An overload protector

Abstract

The utility model discloses an overload protector relates to the technical field of overload protector's installation board, two insulating seats are detachably fixed connection on the installation board, and the first threaded column is formed on the insulating seat, the fuse, the first conducting sheet is set up on the fuse, and one side of the first conducting sheet has the first positioning slot, the second conducting sheet is set up on the fuse, and one side of the second conducting sheet has the second positioning slot, the opening direction of the first positioning slot and the second positioning slot is expanded, two first threaded columns respectively extend into the first positioning slot, the second positioning slot of corresponding position, two first nuts are respectively connected on two first threaded columns through the thread, two third nuts are respectively connected on two first threaded columns through the thread, and the first nut and third nut hold the first conducting sheet, the second conducting sheet of corresponding position, the utility model has convenient to use, convenient replacement, small resistance, low temperature and so on the advantages of heating temperature.

Description

Technical Field

[0001] This utility model relates to the technical field of overload protectors, and in particular to an overload protector. Background Technology

[0002] In my country, railway passenger cars typically have one battery box on each of the first and second seats. Each box contains 39 alkaline batteries. The first-side battery box has a fuse assembly of model DCB-RL80 at the positive terminal outlet and a fuse assembly of model DCB-RL / GL80(-) at the negative terminal outlet. The second-side battery box has a fuse assembly of model DCB-RL80 at the negative terminal outlet and a fuse assembly of model DCB-RL / GL80(+) at the positive terminal outlet, which serves as short-circuit protection.

[0003] Currently, both the DCB-RLx and DCB-RL / GLx fuses use the JF5NR-25 / RD molded shell spiral structure. The fuse is placed on the lower conductive piece inside the molded shell, and the upper conductive piece is connected to the other end of the fuse via a threaded ring. Tightening is achieved by screwing on the ceramic knob on the threaded ring, which compresses the fuse to connect the upper and lower conductive pieces. (e.g.) Figure 4 For DCB-RLx; Figure 5 (JF5NR-25 / RD).

[0004] The existing structure, which involves multiple combinations, has been found to have many shortcomings after years of practical use:

[0005] 1. The fuse and the conductive plates at both ends are pressed into contact by tightening the ceramic knob. If the ceramic knob becomes loose during operation, it can easily cause poor contact, causing the conductive plates to overheat and burn the plastic shell.

[0006] 2. The connection method of one end of the fuse is fuse-threaded ring-upper conductive plate. The threaded ring and the upper conductive plate conduct electricity through the threaded engagement, which can easily increase the contact resistance.

[0007] 3. When replacing the fuse, it is necessary to clean the dust inside the plastic casing in time (dust drifts in through the heat dissipation holes on the plastic casing), otherwise there may be occasional poor contact between the lower conductive piece and the fuse. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide an overload protector to solve the problems of poor contact, high connection resistance, and complicated replacement steps of the fuse connection method in the battery box in the prior art described in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: an overload protector, comprising...

[0010] Mounting plate;

[0011] Two insulating bases are detachably fixed to the mounting plate, and each insulating base has a first threaded post;

[0012] Fuse;

[0013] A first conductive piece is disposed on the fuse, and one side of the first conductive piece has a first positioning groove;

[0014] A second conductive piece is disposed on the fuse, and one side of the second conductive piece has a second positioning groove; the openings of the first positioning groove and the second positioning groove are widened.

[0015] Among them, the two first threaded pins extend into the first positioning groove and the second positioning groove at corresponding positions, respectively;

[0016] Two first nuts are respectively threaded onto two first threaded posts;

[0017] Two third nuts are respectively threaded to two first threaded posts, and the first and third nuts clamp the first and second conductive plates at corresponding positions.

[0018] Preferably, a first spring washer and a first flat washer are fitted on the first threaded post, the first spring washer being located between the first nut and the first flat washer, and the first flat washer contacting the first conductive sheet or the second conductive sheet.

[0019] Preferably, two third flat washers are fitted on the first threaded post, and the two third flat washers are respectively located on both sides of the third nut.

[0020] Preferably, the insulating base has a second threaded post that penetrates the mounting plate, a second spring washer and a second flat washer are fitted on the second threaded post, and a second nut is also threadedly connected to the second threaded post. The second spring washer and the second flat washer are located between the mounting plate and the second nut, and the second flat washer is in contact with the mounting plate.

[0021] The beneficial effects of adopting the above technical solutions are:

[0022] The fuse is directly mounted on the first threaded post of the insulating base, which is fixed to the mounting plate. This reduces intermediate steps, allowing for a one-step installation and effectively avoiding increased contact resistance, preventing excessive temperature rise, and making it convenient to install or replace the fuse. Attached Figure Description

[0023] Figure 1 This is a front view of an overload protector according to this utility model.

[0024] Figure 2 This is a top view of an overload protector according to this utility model.

[0025] Figure 3It is the left view of an overload protector of the present utility model.

[0026] Figure 4 It is a schematic diagram of an existing DCB-RLX fuse.

[0027] Figure 5 It is a schematic diagram of the existing JF5NR-25 / RD plastic shell spiral structure.

[0028] Wherein: mounting plate 10, insulating seat 20, first threaded post 21, second threaded post 22, fuse 30, first conductive sheet 40, first positioning groove 41, second conductive sheet 50, second positioning groove 51, first nut 60, first spring washer 61, first flat washer 62, second nut 70, second spring washer 71, second flat washer 72, third nut 80, third flat washer 81. Specific embodiments

[0029] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0030] As Figure 1-3 , in the first embodiment, an overload protector includes

[0031] Mounting plate 10;

[0032] Two insulating seats 20, which are respectively detachably fixedly connected to the mounting plate 10, and the insulating seat 20 has a first threaded post 21;

[0033] Fuse 30;

[0034] First conductive sheet 40, which is arranged on the fuse 30, and one side of the first conductive sheet 40 has a first positioning groove 41;

[0035] Second conductive sheet 50, which is arranged on the fuse 30, and one side of the second conductive sheet 50 has a second positioning groove 51; the opening directions of the first positioning groove 41 and the second positioning groove 51 are widened;

[0036] Wherein, the two first threaded posts 21 respectively extend into the first positioning groove 41 and the second positioning groove 51 at corresponding positions;

[0037] Two first nuts 60, which are respectively threadedly connected to the two first threaded posts 21;

[0038] Two third nuts 80, which are respectively threadedly connected to the two first threaded posts, and the first nut 60 and the third nut 80 clamp the first conductive sheet 40 and the second conductive sheet 50 at corresponding positions.

[0039] This embodiment is implemented as follows:

[0040] In use, the two third nuts 80 are first threaded onto the two first threaded posts 21 respectively. Then, the first positioning groove 41 of the first conductive piece 40 is fitted onto the first threaded post 21, and the second positioning groove 51 of the second conductive piece 50 is fitted onto the first threaded post 21. Then, the first nut 60 is connected to the first threaded post 21, so that the first nut 60 and the third nut 80 clamp the first conductive piece 40 and the second conductive piece 50. This reduces the intermediate transition links, completes the process in one step, effectively avoids the increase of contact resistance, prevents excessive temperature rise, and makes it convenient to install or replace the fuse 30.

[0041] Please see Figure 1 , 2 3. A first spring washer 61 and a first flat washer 62 are fitted on the first threaded post 21. The first spring washer 61 is located between the first nut 60 and the first flat washer 62. The first flat washer 62 contacts the first conductive sheet 40 or the second conductive sheet 50.

[0042] By having the first spring washer 61 and the first flat washer 62 fitted onto the first threaded post 21 and positioned between the first nut 60 and the first conductive sheet 40 or the second conductive sheet 50, the stability of the first nut 60 can be increased.

[0043] Please see Figure 1 , 3 Two third flat washers 81 are fitted on the first threaded post 21, and the two third flat washers 81 are located on both sides of the third nut 80.

[0044] The stability of the third nut 80 is improved by using third flat washers 81 at both ends of the third nut 80.

[0045] Please see Figure 1 , 3 The insulating base 20 has a second threaded post 22 that penetrates the mounting plate 10. A second spring washer 71 and a second flat washer 71 are fitted on the second threaded post 22. A second nut 70 is also threadedly connected to the second threaded post 22. The second spring washer 71 and the second flat washer 72 are located between the mounting plate 10 and the second nut 70. The second flat washer 72 is in contact with the mounting plate 10.

[0046] By having the second spring washer 71 and the second flat washer 72 fitted onto the second threaded post 21 and positioned between the second nut 70 and the first conductive sheet 40 or the second conductive sheet 50, the stability of the second nut 70 can be increased.

[0047] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An overload protector, characterized in that, include Mounting plate; Two insulating bases are detachably fixed to the mounting plate, and each insulating base has a first threaded post; Fuse; A first conductive piece is disposed on the fuse, and one side of the first conductive piece has a first positioning groove; A second conductive piece is disposed on the fuse, and one side of the second conductive piece has a second positioning groove; the openings of the first positioning groove and the second positioning groove are widened. Among them, the two first threaded pins extend into the first positioning groove and the second positioning groove at corresponding positions, respectively; Two first nuts are respectively threaded onto two first threaded posts; Two third nuts are respectively threaded to two first threaded posts, and the first and third nuts clamp the first and second conductive plates at corresponding positions.

2. An overload protector according to claim 1, characterized in that, The first threaded post is fitted with a first spring washer and a first flat washer. The first spring washer is located between the first nut and the first flat washer. The first flat washer contacts the first conductive plate or the second conductive plate.

3. An overload protector according to claim 2, characterized in that, Two third flat washers are fitted onto the first threaded post, with the two third flat washers located on either side of the third nut.

4. An overload protector according to claim 3, characterized in that, The insulating base has a second threaded post that penetrates the mounting plate. A second spring washer and a second flat washer are fitted on the second threaded post. A second nut is also threaded onto the second threaded post. The second spring washer and the second flat washer are located between the mounting plate and the second nut. The second flat washer is in contact with the mounting plate.

Images