Overcurrent relay

Abstract

The utility model relates to the technical field of current relays, in particular to an overcurrent relay, which comprises a shell, a cover plate is arranged on one side of the shell, a threading port is arranged at one end of the shell, a guide sleeve is fixedly connected inside the shell and positioned on the inner side of the threading port, the guide sleeve is aligned at the threading port in the horizontal direction, and the guide sleeve is fixedly connected with the cover plate. According to the utility model, the guide sleeve is arranged at the position, corresponding to the threading port, in the shell, so that when the overcurrent relay is wired, a line can pass through the guide sleeve, and then the movable plate is tensioned by using the pressure spring, so that the wiring of the overcurrent relay is facilitated. The movable plate extrudes the insulating rubber gasket, and the insulating rubber gasket extrudes the line located in the guide sleeve, thereby improving the friction force between the insulating sleeve and the external line, achieving the positioning of the external line, and enabling the external line to be not liable to loosen when the external line is introduced into the housing.

Description

Technical Field

[0001] The utility model relates to the technical field of current relays, and specifically relates to an over-current relay. Background Technique

[0002] The main function of the over-current relay is to protect electrical equipment from the impact of large currents, ensure that it is disconnected from the power grid within an effective time period, and thus prevent equipment damage or personal injury.

[0003] In the prior art, such as a thermal over-current relay clamping structure proposed in the patent application number "CN201220388301.2", which includes an upper shell, a lower shell and a cover plate installed on the rear side of the upper shell and the lower shell. The bottom surface of the upper shell is provided with more than one card slot and positioning slot, and the top surface of the lower shell is provided with corresponding numbers of strip-shaped hooks and positioning protrusions.

[0004] However, in the above patent application, when the over-current relay is used, external lines need to be introduced into the interior of the shell through the openings on the shell. However, there is a lack of a mechanism for positioning the lines at the shell, so that the external lines are prone to looseness. Content of the Utility Model

[0005] The purpose of the utility model is to provide an over-current relay to solve the problems raised in the above background technique.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] An over-current relay includes a shell. One side of the shell is provided with a cover plate. One end of the shell is provided with a wire passing opening. Inside the shell and on the inner side of the wire passing opening, a guiding sleeve is fixedly connected. The guiding sleeve is aligned with the wire passing opening in the horizontal direction. The inner surfaces at both ends of the guiding sleeve are inclined to form guiding curved surfaces.

[0008] On the inner wall of the shell and on one side of the guiding sleeve, a fixed sleeve is fixedly connected. A cavity is opened in the fixed sleeve. A movable positioning pressure plate is arranged in the cavity. One end of the positioning pressure plate is set as a curved surface. A positioning opening is opened on the side of the guiding sleeve close to the fixed sleeve. An insulating rubber gasket is fixedly connected to the inner wall of the positioning opening. One end of the positioning pressure plate abuts against the insulating rubber gasket.

[0009] Preferably, a partition is fixedly connected inside the cavity. One end of the positioning pressure plate is fixedly connected with a positioning shaft. One end of the positioning shaft penetrates through the partition and is fixedly connected with a movable plate. A pressure spring is fixedly connected to one side of the movable plate. One end of the pressure spring is fixedly connected with the partition. The pressure spring is sleeved on the outer surface of the positioning shaft.

[0010] Preferably, a fixed connecting plate is fixedly connected to the fixed sleeve, and one end of the fixed connecting plate away from the fixed sleeve is fixedly connected to the guiding sleeve.

[0011] Preferably, a fixed sleeve column is fixedly connected to the inner wall of the housing, and a fixing hole is formed in the cover plate on the outer side of the fixed sleeve column. The fixing hole and the fixed sleeve column are used to assist in fixing the housing and the cover plate.

[0012] Preferably, a plurality of clamping blocks arranged in a linear array are fixedly connected to the inner wall of the housing, and clamping grooves arranged in a linear array are formed on the inner surface of the cover plate. The clamping grooves are adapted to the clamping blocks.

[0013] Preferably, there are two wire passing openings and guiding sleeves. A fixing seat is arranged at one end of the housing away from the wire passing opening, and the fixing seat is used to assist in fixing the housing.

[0014] Advantages of the present utility model:

[0015] By arranging guiding sleeves at positions corresponding to the wire passing openings inside the housing, when wiring the overcurrent relay, the wires can pass through the guiding sleeves, and then the movable plate is tightened by the pressure spring. The movable plate presses the insulating rubber gasket, and the insulating rubber gasket presses the wires located inside the guiding sleeves, improving the friction between the insulating sleeve and the external wires, realizing the positioning of the external wires, and making it not easy for the external wires to loosen when introduced into the housing. Description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is the present utility model Figure 1 a schematic diagram of the connection between the housing and the cover plate in;

[0019] Figure 3 is the present utility model Figure 2 a rear view of the cover plate in;

[0020] Figure 4 is the present utility model Figure 2 a schematic diagram of the internal structure of the housing in;

[0021] Figure 5 is the present utility model Figure 4 a schematic diagram of the connection between the guiding sleeve and the fixed sleeve in;

[0022] Figure 6 is a cross-sectional view of the fixing sleeve in the present utility model Figure 5 in the present utility model

[0023] The reference numerals in the figure are as follows:

[0024] 1. Housing, 2. Cover plate, 3. Wire passing opening, 4. Guide sleeve, 401. Guide curved surface part, 5. Fixing sleeve, 501. Fixed connecting plate, 6. Cavity, 7. Positioning pressure plate, 8. Positioning opening, 9. Insulating rubber gasket, 10. Partition board, 11. Positioning shaft, 12. Movable plate, 13. Pressure spring, 14. Fixing sleeve column, 15. Fixing hole, 16. Clamping block, 17. Clamping groove, 18. Fixed seat. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0026] An overcurrent relay includes a housing 1. A cover plate 2 is provided on one side of the housing 1. A wire passing opening 3 is formed at one end of the housing 1. A guide sleeve 4 is fixedly connected inside the housing 1 and on the inner side of the wire passing opening 3. The guide sleeve 4 is horizontally aligned with the wire passing opening 3. The inner surfaces at both ends of the guide sleeve 4 are inclined to form guide curved surface parts 401.

[0027] A fixing sleeve 5 is fixedly connected to the inner wall of the housing 1 and on one side of the guide sleeve 4. A cavity 6 is formed inside the fixing sleeve 5. A movable positioning pressure plate 7 is arranged inside the cavity 6. One end of the positioning pressure plate 7 is a curved surface. A positioning opening 8 is formed on the side of the guide sleeve 4 close to the fixing sleeve 5. An insulating rubber gasket 9 is fixedly connected to the inner wall of the positioning opening 8. One end of the positioning pressure plate 7 abuts against the insulating rubber gasket 9.

[0028] As Figure 1 、 Figure 4 and Figure 5 , the housing 1 is the housing of an overcurrent relay in the prior art. The cover plate 2 is used to close the opening on one side of the housing 1. External circuits can extend into the housing 1 through the wire passing opening 3. The guide sleeve 4 is made of insulating material and can provide protection for the circuits. By providing the guide curved surface parts 401 at both ends of the guide sleeve 4, it is easier for external circuits to pass through the guide sleeve 4.

[0029] Inside the cavity 6, there is a partition 10 fixedly connected. One end of the positioning pressure plate 7 is fixedly connected with a positioning shaft 11. One end of the positioning shaft 11 penetrates through the partition 10 and is fixedly connected with a movable plate 12. One side of the movable plate 12 is fixedly connected with a pressure spring 13. One end of the pressure spring 13 is fixedly connected with the partition 10, and the pressure spring 13 is sleeved on the outer surface of the positioning shaft 11.

[0030] As Figure 4 , Figure 5 and Figure 6 , the pressure spring 13 has a pulling force on the movable plate 12 in the direction of the partition 10. There is an opening on the partition 10 to facilitate the positioning shaft 11 to pass through, so that the movable plate 12, the positioning shaft 11 and the positioning pressure plate 7 can move together.

[0031] On the fixed sleeve 5, there is a fixed connecting plate 501 fixedly connected. One end of the fixed connecting plate 501 away from the fixed sleeve 5 is fixedly connected with the guiding sleeve 4.

[0032] As Figure 5 and Figure 6 , the fixed sleeve 5 is fixed to the guiding sleeve 4 through the fixed connecting plate 501 and can be connected to the guiding sleeve 4 to form a whole.

[0033] On the inner wall of the housing 1, there is a fixed sleeve column 14 fixedly connected. On the cover plate 2 and outside the fixed sleeve column 14, there is a fixing hole 15. The fixing hole 15 and the fixed sleeve column 14 are used to assist in fixing the housing 1 and the cover plate 2.

[0034] As Figure 1 , Figure 2 , Figure 3 and Figure 4 , there is a threaded hole inside the fixed sleeve column 14. When the cover plate 2 is covered on the housing 1, the fixed sleeve column 14 and the fixing hole 15 are aligned. At this time, a bolt can pass through the fixing hole 15 and be threadedly connected to the fixed sleeve column 14 to fix the cover plate 2 and the housing 1.

[0035] On the inner wall of the housing 1, there are a plurality of clamping blocks 16 fixedly connected in a linear array. On the inner surface of the cover plate 2, there are clamping grooves 17 fixedly connected in a linear array. The clamping grooves 17 and the clamping blocks 16 are adapted to each other.

[0036] As Figure 1 , Figure 2 , Figure 3 and Figure 4 , when the cover plate 2 is covered on the housing 1, the clamping blocks 16 will be correspondingly clamped into the clamping grooves 17 to realize the clamping between the cover plate 2 and the housing 1.

[0037] There are two threading ports 3 and guiding sleeves 4 respectively. At one end of the housing 1 away from the threading port 3, there is a fixing seat 18. The fixing seat 18 is used to assist in fixing the housing 1.

[0038] Such as Figure 1 And Figure 4 The fixing base 18 is adapted to an external mechanism. When installing the housing 1, the fixing base 18 and the external mechanism are connected together to install and fix the housing 1.

[0039] The working principle of an overcurrent relay provided by the present utility model is as follows:

[0040] When an external circuit extends into the interior of the housing 1 through the wire passing port 3, the circuit can pass through the guiding sleeve 4 under the guiding of the guiding curved surface portion 401. Under the pulling force of the pressure spring 13, the movable plate 12 will be pulled towards the partition plate 10. The movable plate 12 drives the positioning pressing plate 7 to move together through the positioning shaft 11. The positioning pressing plate 7 moves towards the interior of the guiding sleeve 4 and presses the insulating rubber gasket 10. The insulating rubber gasket 10 is pressed against the surface of the circuit passing through the guiding sleeve 4 to press and position the circuit, preventing the circuit from loosening.

[0041] Compared with the related art, an overcurrent relay provided by the present utility model has the following beneficial effects:

[0042] By arranging the guiding sleeve 4 at a position corresponding to the wire passing port 3 inside the housing 1, when wiring the overcurrent relay, the circuit can pass through the guiding sleeve 4. Then, the pressure spring 13 is used to tighten the movable plate 12. The movable plate 12 presses the insulating rubber gasket 9, and the insulating rubber gasket 9 presses the circuit located inside the guiding sleeve 4, enhancing the friction between the insulating sleeve 4 and the external circuit, realizing the positioning of the external circuit, and making it not easy for the external circuit to loosen when introduced into the interior of the housing 1.

[0043] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An overcurrent relay, comprising a housing (1), characterized in that: A cover plate (2) is provided on one side of the shell (1), a threading opening (3) is provided at one end of the shell (1), a guide sleeve (4) is fixedly connected inside the shell (1) and located on the inner side of the threading opening (3), the guide sleeve (4) is aligned with the threading opening (3) in the horizontal direction, and the inner surfaces of both ends of the guide sleeve (4) are inclined to form a guide curved surface portion (401); A fixing sleeve (5) is fixedly connected to the inner wall of the shell (1) and located on one side of the guide sleeve (4); a cavity (6) is provided in the fixing sleeve (5); a movable positioning pressure plate (7) is provided in the cavity (6); one end of the positioning pressure plate (7) is arranged as a curved surface; a positioning opening (8) is provided on the side of the guide sleeve (4) close to the fixing sleeve (5); an insulating rubber gasket (9) is fixedly connected to the inner wall of the positioning opening (8); one end of the positioning pressure plate (7) is in contact with the insulating rubber gasket (9).

2. An overcurrent relay according to claim 1, characterized in that: A partition (10) is fixedly connected to the interior of the cavity (6); one end of the positioning pressure plate (7) is fixedly connected to a positioning shaft (11); one end of the positioning shaft (11) passes through the partition (10) and is fixedly connected to a movable plate (12); one side of the movable plate (12) is fixedly connected to a pressure spring (13); one end of the pressure spring (13) is fixedly connected to the partition (10); and the pressure spring (13) is sleeved on the outer surface of the positioning shaft (11).

3. An overcurrent relay according to claim 2, characterized in that: A fixed connecting plate (501) is fixedly connected to the fixed sleeve (5), and one end of the fixed connecting plate (501) away from the fixed sleeve (5) is fixedly connected to the guide sleeve (4).

4. An overcurrent relay according to claim 1, characterized in that: A fixing sleeve (14) is fixedly connected to the inner wall of the shell (1), and a fixing hole (15) is provided on the cover plate (2) and located outside the fixing sleeve (14). The fixing hole (15) and the fixing sleeve (14) are used to assist in fixing the shell (1) and the cover plate (2).

5. An overcurrent relay according to claim 4, characterized in that: A plurality of clamping blocks (16) in a linear array are fixedly connected to the inner wall of the housing (1), and clamping grooves (17) in a linear array are provided on the inner surface of the cover plate (2), wherein the clamping grooves (17) and the clamping blocks (16) are matched.

6. An overcurrent relay according to claim 1, characterized in that: The threading opening (3) and the guide sleeve (4) are both provided with two, and a fixing seat (18) is provided at one end of the housing (1) away from the threading opening (3), and the fixing seat (18) is used to assist in fixing the housing (1).

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