Wire-wound resistor with porcelain shell

Abstract

The utility model discloses a wire-wound resistor with a ceramic shell, and particularly relates to the technical field of wire-wound resistors, the wire-wound resistor comprises a ceramic framework, stainless steel terminating caps are connected to the two ends of the ceramic framework, pins are connected to the middle positions of the outer sides of the stainless steel terminating caps, the outer sides of the pins are sleeved with the shell, and the outer side of the shell is sleeved with the stainless steel terminating caps. The outer side of the ceramic framework is sleeved with a first ceramic shell and a second ceramic shell, the two sides of the first ceramic shell and the two sides of the second ceramic shell are each connected with a pair of protruding plates, meanwhile, a pair of shifting pieces on the two sides are pressed inwards, reset springs are extruded, bottom plates on the upper side and the lower side are driven to move oppositely, and the protruding plates are conveniently inserted into the shells to be fixed; and then the shifting piece is loosened, the inserting rod is driven to be inserted into the protruding plate and the positioning cylinder through the springback effect of the reset spring, fixed installation is completed, the step of threaded connection through a threaded shaft is omitted, stability is improved, and the problems that loosening is prone to being affected by vibration or external force, and stability is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wire-wound resistor technical field, concretely relates to a porcelain shell wire-wound resistor. BACKGROUND

[0002] The porcelain shell wire-wound resistor is a resistor that is wound on a ceramic framework by using constantan, manganese copper or nickel complex alloy wire, and has protective paint or glass glaze on the surface, wherein the resistor body is the resistor wire, the resistor wire is wound on the ceramic framework, the lead wire is connected, and the surface is coated with a layer of glass glaze or insulating paint to form the wire-wound resistor.

[0003] A high-power porcelain shell wire-wound resistor is disclosed in a Chinese patent (publication number CN213815687U), which is provided with a threaded shaft and a sealing ring. The threaded shaft is connected to the porcelain shell in a screwing manner, the sealing ring is connected to the porcelain shell in a sliding manner, and the porcelain shell is connected to the ceramic body and the resistor wire in a sliding manner. When using the device, the disassembly and assembly of the device are facilitated. However, the threaded connection of the threaded shaft is prone to loosening due to vibration or external force during use, which reduces the stability. SUMMARY

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A porcelain shell wire-wound resistor comprises:

[0006] A ceramic framework has a resistor wire wound on the outer side, and a stainless steel terminal cap is connected to each end of the ceramic framework. A lead pin is connected to the middle of the outer side of the stainless steel terminal cap. An outer shell is provided on the outer side of the lead pin. A positioning mechanism is arranged in the inner part of the outer shell.

[0007] A first porcelain shell and a second porcelain shell are provided on the outer side of the ceramic framework. A pair of convex plates are connected to the two sides of the first porcelain shell and the second porcelain shell. A positioning hole is formed in the inner part of the convex plate. The convex plate extends to the inner part of the outer shell on one side and is fixedly connected through the positioning mechanism.

[0008] In one possible implementation, the positioning mechanism comprises a pair of partitions, the two sides of the partition are fixedly connected to the inner wall of the outer shell, the upper and lower sides of the partition are connected to a reset spring, one end of the reset spring is connected to a bottom plate, one side of the bottom plate is connected to a push piece, one side of the push piece extends to the outer side of the outer shell, the other side of the bottom plate is connected to a plug rod, the end of the plug rod is provided with a positioning cylinder, and the bottom of the positioning cylinder is fixedly connected to the inner wall of the outer shell.

[0009] In a possible implementation, the front side of the shell is provided with four second rectangular holes, and one side of the pressing piece penetrates the inside of the second rectangular hole and extends to the outside of the shell.

[0010] In a possible implementation, the back side of the shell is provided with four first rectangular holes, and one side of the convex plate penetrates the inside of the first rectangular hole and extends to the inside of the shell.

[0011] In a possible implementation, the position of the positioning hole corresponds to the position of the inserting rod.

[0012] In a possible implementation, the bottom of the first porcelain shell is connected with four clamping columns, and the top of the second porcelain shell is provided with four clamping grooves.

[0013] In a possible implementation, the position of the clamping groove corresponds to the position of the clamping column.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are as follows:

[0015] 1. By simultaneously pressing a pair of pressing pieces on both sides inward and extruding the reset spring, the bottom plates on both sides are driven to move towards each other, thereby driving the inserting rod to be taken out from the inside of the positioning cylinder and the convex plate, and then the shell, the first porcelain shell and the second porcelain shell are conveniently disassembled; conversely, when fixing and installing is needed, the pressing pieces on both sides are pressed again and the reset spring is extruded, the inserting rods on both sides are driven to move towards each other, the convex plate is conveniently inserted into the shell for fixing, then the pressing pieces are released, the rebound effect of the reset spring is utilized to drive the inserting rod to be inserted into the inside of the convex plate and the positioning cylinder, the fixing and installing are completed, the step of threadedly connecting through the threaded shaft is saved, the stability is improved, and the problem of loosening and reducing stability due to the influence of vibration or external force is solved.

[0016] 2. By arranging four clamping columns at the bottom of the first porcelain shell and arranging four clamping grooves corresponding to the clamping columns at the top of the second porcelain shell, the stability during the connection of the first porcelain shell and the second porcelain shell is conveniently improved, and the problem of easy deviation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2The overall structure explosion map of the utility model;

[0020] Figure 3 The rear view side sectional view of the shell of the utility model;

[0021] Figure 4 The explosion map of the first porcelain shell and the second porcelain shell of the utility model.

[0022] Mark explanation:

[0023] 1, the first porcelain shell; 2, the second porcelain shell; 3, the shell; 4, the paddle; 5, the pin; 6, the ceramic framework; 7, the resistance wire; 8, the stainless steel terminal cap; 9, the convex plate; 10, the positioning hole; 11, the first rectangular hole; 12, the second rectangular hole; 13, the partition plate; 14, the reset spring; 15, the bottom plate; 16, the insertion rod; 17, the positioning cylinder; 18, the clamping groove; 19, the clamping column. Specific implementation

[0024] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be further introduced in detail below in conjunction with the drawings.

[0025] The porcelain shell wire-wound resistor provided by the embodiment of the application solves the problems in the prior art.

[0026] The technical scheme in the embodiment of the application is as follows to solve the above problems:

[0027] As shown in Figures 1-4 A porcelain shell wire-wound resistor, comprising:

[0028] The outer side of the ceramic framework 6 is wound with the resistance wire 7, both ends of the ceramic framework 6 are connected with the stainless steel terminal cap 8, the middle position of the outer side of the stainless steel terminal cap 8 is connected with the pin 5, the outer side of the pin 5 is sleeved with the shell 3, and the inside of the shell 3 is provided with a positioning mechanism;

[0029] The outer side of the ceramic framework 6 is respectively sleeved with the first porcelain shell 1 and the second porcelain shell 2, both sides of the first porcelain shell 1 and the second porcelain shell 2 are connected with a pair of convex plates 9, the inside of the convex plate 9 is provided with the positioning hole 10, and one side of the convex plate 9 extends to the inside of the shell 3 and is fixedly connected through the positioning mechanism.

[0030] In some examples, the positioning mechanism includes a pair of partitions 13, both sides of the partitions 13 are fixedly connected with the inner wall of the shell 3, both upper and lower sides of the partitions 13 are connected with return springs 14, one end of the return springs 14 is connected with a bottom plate 15, one side of the bottom plate 15 is connected with a push piece 4, one side of the push piece 4 extends to the outside of the shell 3, the other side of the bottom plate 15 is connected with a plug rod 16, the end of the plug rod 16 is sleeved with a positioning cylinder 17, the bottom of the positioning cylinder 17 is fixedly connected with the inner wall of the shell 3, at the same time, the pair of push pieces 4 on both sides are pressed inward, and the return springs 14 are extruded, the bottom plates 15 on both upper and lower sides are driven to move towards each other, and then the plug rod 16 is taken out from the inside of the positioning cylinder 17 and the lug plate 9, and vice versa. Press the pair of push pieces 4 on both sides, extrude the return springs 14, drive the plug rods 16 on both upper and lower sides to move towards each other, facilitate the insertion of the lug plate 9 into the shell 3 for fixation, then release the push piece 4, use the rebound effect of the return spring 14 to drive the plug rod 16 to insert into the inside of the lug plate 9 and the positioning cylinder 17.

[0031] In some examples, four second rectangular holes 12 are formed in the front side of the shell 3, one side of the push piece 4 penetrates the inside of the second rectangular hole 12 and extends to the outside of the shell 3, facilitating the push piece 4 to slide up and down along the front side of the shell 3.

[0032] In some examples, four first rectangular holes 11 are formed in the back side of the shell 3, one side of the lug plate 9 penetrates the inside of the first rectangular hole 11 and extends to the inside of the shell 3, facilitating the lug plate 9 to pass through the inside of the first rectangular hole 11 and insert into the inside of the shell 3.

[0033] In some examples, the positions of the positioning holes 10 correspond to the positions of the plug rods 16, after the lug plate 9 is inserted into the inside of the shell 3, the plug rods 16 are facilitated to be inserted into the inside of the positioning holes 10.

[0034] In some examples, the bottom of the first porcelain shell 1 is connected with four clamping columns 19, and the top of the second porcelain shell 2 is formed with four clamping grooves 18, facilitating to improve the stability during the connection of the first porcelain shell 1 and the second porcelain shell 2, and avoiding the problem of easy deviation.

[0035] In some examples, the positions of the clamping grooves 18 correspond to the positions of the clamping columns 19, facilitating the clamping columns 19 to be inserted into the inside of the clamping grooves 18.

[0036] The utility model discloses a pair of the pressing piece 4 of one side is pressed to the inside through the pressing piece 4 of the other side, and the reset spring 14 is extruded, and the bottom plate 15 of upper and lower sides is driven to move to each other, and then the plug rod 16 is taken out from the inside of the positioning cylinder 17 and the lug plate 9, and the shell 3, first porcelain shell 1 and second porcelain shell 2 are conveniently disassembled, and vice versa, when needing to be fixed and installed, press the pressing piece 4 of one side to the inside again, and the reset spring 14 is extruded, and the plug rod 16 of upper and lower sides is driven to move to each other, and the lug plate 9 is conveniently inserted into the shell 3 and is fixed, and then the pressing piece 4 is loosened, and the rebound effect of the reset spring 14 is utilized, and the plug rod 16 is inserted into the inside of the lug plate 9 and the positioning cylinder 17, and fixed and installed are completed, and the step of being connected through the threaded shaft thread is saved, and the stability is improved.

[0037] The above only describes certain exemplary embodiments of the utility model through the way of illustration, and it is needless to say that the ordinary skilled in the art can modify the described embodiments in various different ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A porcelain housed wirewound resistor characterized by, Include: The outer side of the ceramic skeleton (6) is wound with resistance wire (7), both ends of the ceramic skeleton (6) are connected with stainless steel end cap (8), the middle position of the outer side of the stainless steel end cap (8) is connected with pin (5), the outer side of the pin (5) is sleeved with shell (3), the inside of the shell (3) is provided with positioning mechanism; The outer side of the ceramic skeleton (6) is sleeved with first porcelain shell (1) and second porcelain shell (2) respectively, both sides of the first porcelain shell (1) and the second porcelain shell (2) are connected with a pair of convex plate (9), the inside of the convex plate (9) is provided with positioning hole (10), one side of the convex plate (9) extends to the inside of the shell (3) and is fixedly connected through the positioning mechanism.

2. A ceramic housed wirewound resistor according to claim 1, characterised in that: The positioning mechanism includes a pair of partition plates (13), both sides of the partition plate (13) are fixedly connected with the inner wall of the shell (3), the upper and lower sides of the partition plate (13) are connected with reset spring (14), one end of the reset spring (14) is connected with bottom plate (15), one side of the bottom plate (15) is connected with push piece (4), one side of the push piece (4) extends to the outside of the shell (3), the other side of the bottom plate (15) is connected with plug rod (16), the tail end of the plug rod (16) is sleeved with positioning cylinder (17), the bottom of the positioning cylinder (17) is fixedly connected with the inner wall of the shell (3).

3. A wirewound resistor in a ceramic housing according to claim 2, characterized in that: The front side of the shell (3) is provided with four second rectangular holes (12), one side of the push piece (4) penetrates the inside of the second rectangular hole (12) and extends to the outside of the shell (3).

4. A ceramic housed wirewound resistor according to claim 2, wherein: The back side of the shell (3) is provided with four first rectangular holes (11), one side of the convex plate (9) penetrates the inside of the first rectangular hole (11) and extends to the inside of the shell (3).

5. A ceramic housed wirewound resistor according to claim 2, wherein: The position of the positioning hole (10) corresponds to the position of the plug rod (16).

6. A ceramic housed wirewound resistor according to claim 1 wherein: The bottom of the first porcelain shell (1) is connected with four clamping columns (19), the top of the second porcelain shell (2) is provided with four clamping grooves (18).

7. A wirewound resistor in a ceramic housing according to claim 6, characterized in that: The position of the clamping groove (18) corresponds to the position of the clamping column (19).

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