Overload protector

Abstract

The utility model belongs to the technical field of electrical control, and particularly relates to an overload protector, which comprises a first shell and a second shell, a mounting pipe is assembled between the first shell and the second shell, an abutting ring and a limiting ring are fixedly arranged on the mounting pipe, the limiting ring is of a polygonal structure, threads are arranged on the mounting pipe, a button is movably inserted in the mounting pipe in a penetrating manner, and the button is connected with the abutting ring. A snap ring is fixedly arranged on the button, a spring sleeves the button, the spring is located in the mounting pipe, the two ends of the spring abut against the snap ring and the inner wall of the mounting pipe respectively, mounting grooves are oppositely formed in the first shell and the second shell, and when the mounting pipe is assembled, grooves between the abutting ring and the limiting ring are assembled with the mounting grooves in a matched mode; a first wiring insertion piece groove and a second wiring insertion piece groove are fixedly formed in the first shell, a first wiring insertion piece and a second wiring insertion piece are assembled in the first wiring insertion piece groove and the second wiring insertion piece groove respectively, and through cooperation of the structures, the utilization rate of the internal space of the overload protector is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical control, and specifically relates to an overload protector. Background Art

[0002] An overload protector is an electrical safety device mainly used to monitor the current load of a circuit or equipment. When the current exceeds the set value, it can automatically cut off the power supply to prevent equipment from being overloaded, damaged or even causing a fire. It is widely used in industries such as machinery, metallurgy, building materials, chemical industry, and textile to ensure the safe and stable operation of the electrical system.

[0003] The existing overload protector mainly consists of a bimetallic thermal element, an operating mechanism, contacts and a reset button, etc. Its working principle is based on the thermal effect of current: when the current is too large, the bimetallic thermal element is deformed by heat, pushing the operating mechanism to disconnect the contacts of the circuit, thereby protecting the equipment from overload damage. The reset button is used to restore the protector to its initial state and reconnect the circuit.

[0004] At present, the overload protector in the existing technology has the following disadvantages: the utilization rate of the internal structure space is low, which is not conducive to miniaturization, and has great limitations in use in some equipment with small internal installation spaces; therefore, an overload protector is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the existing overload protector and solve the problems of low utilization rate of the internal structure space, not being conducive to miniaturization, and having great limitations in use in some equipment with small internal installation spaces, an overload protector is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: An overload protector of the utility model includes a first housing and a second housing. An installation pipe is assembled between the first housing and the second housing. An abutting ring and a limiting ring are fixedly arranged on the installation pipe. The limiting ring is of a polygonal structure. Threads are provided on the installation pipe. A button is movably inserted into the installation pipe. A clamping ring is fixedly arranged on the button. A spring is sleeved on the button and is located inside the installation pipe, and its two ends are respectively abutted against the clamping ring and the inner wall of the installation pipe. Installation grooves are oppositely opened on both the first housing and the second housing. When the installation pipe is assembled, the groove between the abutting ring and the limiting ring is assembled in cooperation with the installation groove.

[0007] Preferably, a first wiring terminal slot and a second wiring terminal slot are fixedly arranged in the first housing respectively. A first wiring terminal and a second wiring terminal are assembled in the first wiring terminal slot and the second wiring terminal slot respectively. A memory reed is fixedly arranged on the first wiring terminal. The memory reed is horizontally arranged inside the first housing and the second housing. A first contact is fixedly arranged on the memory reed. A second contact is fixedly arranged on the second wiring terminal. Both the first contact and the second contact are made of copper.

[0008] Preferably, clamping grooves are oppositely formed on both the first housing and the second housing. Slots corresponding to the clamping grooves are formed on both the first wiring terminal and the second wiring terminal.

[0009] Preferably, limiting blocks are fixedly arranged oppositely on the inner walls of both the first housing and the second housing. The limiting blocks are used to limit the lowest point of button pressing.

[0010] Preferably, at least two positioning columns are fixedly arranged in the first housing. A positioning groove corresponding to the positioning columns is arranged in the second housing, and a sliding groove cooperating with the positioning columns is arranged on the inner wall of the second housing.

[0011] Preferably, at least two first fixing columns are fixedly arranged inside the second housing. A first fixing hole corresponding to the first fixing columns is fixedly arranged in the first housing for fixedly assembling the first housing and the second housing.

[0012] Preferably, the aperture size of the first fixing hole is slightly smaller than the diameter of the first fixing column.

[0013] Preferably, a chamfer is formed at the entrance of the first fixing hole.

[0014] Preferably, a second fixing column is fixedly arranged inside the second housing. A second fixing hole corresponding to the second fixing column is fixedly arranged in the first housing.

[0015] Preferably, reinforcing ribs are fixedly arranged on the inner wall of the second housing.

[0016] The beneficial effects of the present utility model:

[0017] The present utility model provides an overload protector. Through the cooperation between the overall structures, the utilization rate of the internal structure space of the overload protector is greatly improved, which is beneficial to the miniaturization of the overload protector and wider application places. And the compact structure design can reduce problems such as looseness and poor contact that may be caused by too large gaps between components, thereby improving the overall reliability of the overload protector. At the same time, the reasonable space layout also helps to reduce the damage caused by external factors such as vibration and impact.

[0018] Cost reduction: Improving the utilization rate of internal space can reduce the amount of materials used and lower the manufacturing costs of production enterprises. In addition, a more compact structure also means that space and resources can be saved during transportation, installation, and maintenance, further reducing the overall cost. Description of the Drawings

[0019] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall internal structure;

[0021] Figure 2 is a plan view of the whole;

[0022] Figure 3 is a three-dimensional view of the structure of the first housing;

[0023] Figure 4 is a three-dimensional view of the structure of the second housing;

[0024] Figure 5 is a plan view of the structure of the first housing;

[0025] Figure 6 is a plan view of the structure of the second housing;

[0026] Figure 7 is a sectional plan view of the installation pipe;

[0027] Figure 8 is a three-dimensional view of the structure of the installation pipe and the button;

[0028] Figure 9 is a three-dimensional view of the structure of the first wiring tab;

[0029] Figure 10 is a three-dimensional view of the structure of the second wiring tab;

[0030] Legend:

[0031] 1. First housing; 2. Second housing; 3. Installation pipe; 4. Bracing ring; 5. Limiting ring; 6. Thread; 7. Spring; 8. Installation groove; 9. First wiring tab groove; 10. Second wiring tab groove; 11. First wiring tab; 12. Second wiring tab; 13. Memory reed; 14. First contact; 15. Second contact; 16. Card slot; 17. Slot; 18. Limiting block; 19. Positioning post; 20. Positioning groove; 21. Slide groove; 22. First fixing post; 23. First fixing hole; 24. Second fixing post; 25. Second fixing hole; 26. Reinforcing rib; 27. Button; 28. Snap ring. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The following gives specific embodiments.

[0034] Please refer to Figures 1 - 10 , an overload protector of the present invention includes a first housing 1 and a second housing 2. An installation pipe 3 is assembled between the first housing 1 and the second housing 2. A resisting ring 4 and a limiting ring 5 are fixedly arranged on the installation pipe 3. The limiting ring 5 is of a polygonal structure. A thread 6 is provided on the installation pipe 3. A button 27 is movably inserted into the installation pipe 3. A clamping ring 28 is fixedly arranged on the button 27. A spring 7 is sleeved on the button 27 and is located inside the installation pipe 3. The two ends of the spring 7 are respectively in contact with the clamping ring 28 and the inner wall of the installation pipe 3. Installation grooves 8 are oppositely provided on both the first housing 1 and the second housing 2. When the installation pipe 3 is assembled, the groove between the resisting ring 4 and the limiting ring 5 is assembled in cooperation with the installation groove 8. During operation, the spring 7 is arranged inside the installation pipe 3 and sleeved on the button 27. The cooperation of this structure greatly improves the utilization rate of the internal space. And through the cooperation of the installation groove 8, the resisting ring 4 and the limiting ring 5, the assembly of the installation pipe 3 with the first housing 1 and the second housing 2 is more stable. And the limiting ring 5 is of a polygonal structure, and its flat side is close to the inner walls of the first housing 1 and the second housing 2. Such a structure enables the fittings rotatably sleeved on the thread of the installation pipe 3 not to cause the installation pipe 3 to rotate during assembly, affecting the assembly.

[0035] Furthermore, a first wiring insert slot 9 and a second wiring insert slot 10 are respectively fixedly arranged inside the first housing 1. A first wiring insert 11 and a second wiring insert 12 are respectively assembled in the first wiring insert slot 9 and the second wiring insert slot 10. A memory reed 13 is fixedly arranged on the first wiring insert 11. The memory reed 13 is horizontally arranged inside the first housing 1 and the second housing 2. A first contact 14 is fixedly arranged on the memory reed 13. A second contact 15 is fixedly arranged on the second wiring insert 12. Both the first contact 14 and the second contact 15 are made of copper. During operation, the first wiring insert slot 9 is arranged in a Z-shaped structure, the second wiring insert slot 10 is arranged in an L-shaped structure, and the structures of the first wiring insert 11 and the second wiring insert 12 are respectively corresponding to the first wiring insert slot 9 and the second wiring insert slot 10. The cooperation of such a structure further improves the utilization rate of the overall internal structure space.

[0036] Further, clamping grooves 16 are oppositely formed on both the first housing 1 and the second housing 2, and slots 17 corresponding to the clamping grooves 16 are formed on both the first wiring insert piece 11 and the second wiring insert piece 12. During operation, through the cooperation of the clamping grooves 16 and the slots 17, when the first wiring insert piece 11 and the second wiring insert piece 12 are assembled, the structural state is more firm and the reliability is higher.

[0037] Further, limiting blocks 18 are fixedly arranged oppositely on the inner walls of both the first housing 1 and the second housing 2. The limiting blocks 18 are used to limit the lowest point of the button 27 being pressed. Through the cooperation of the limiting blocks 18, when the button 27 is pressed and reset, the limiting blocks 18 limit the lowest point of the button being pressed, preventing damage to the memory reed 13 caused by excessive pressing and affecting its service life.

[0038] Further, at least two positioning columns 19 are fixedly arranged in the first housing 1, a positioning groove 20 corresponding to the positioning columns 19 is arranged in the second housing 2, and a sliding groove 21 cooperating with the positioning columns 19 is arranged on the inner wall of the second housing 2. During operation, when the first housing 1 is assembled with the second housing 2, due to the relatively long length of the positioning columns 19, they first insert into the positioning groove 20 to ensure the correct assembly position of the first housing 1 and the second housing 2, and under the cooperation of the sliding groove 21, guide the positioning columns 19 when inserting into the positioning groove 20.

[0039] Further, at least two first fixing columns 22 are fixedly arranged inside the second housing 2, and first fixing holes 23 corresponding to the first fixing columns 22 are fixedly arranged in the first housing 1 for fixedly assembling the first housing 1 and the second housing 2. The aperture size of the first fixing holes 23 is slightly smaller than the diameter of the first fixing columns 22, and a chamfer is formed at the entrance of the first fixing holes 23. During operation, when the first housing 1 is spliced with the second housing 2, the first fixing columns 22 will insert into the first fixing holes 23. And because the aperture of the first fixing holes 23 is smaller than the diameter of the first fixing columns 22, the friction force is larger when the first fixing columns 22 enter the first fixing holes 23, thereby improving the firmness of the fixed assembly between the first housing 1 and the second housing 2. Because a chamfer is formed at the entrance of the first fixing holes 23, it is more convenient when the first fixing columns 22 insert into them.

[0040] Further, a second fixing column 24 is fixedly arranged inside the second housing 2, and a second fixing hole 25 corresponding to the second fixing column 24 is fixedly arranged in the first housing 1. During operation, when the first housing 1 is spliced with the second housing 2, the second fixing column 24 will insert into the second fixing hole 25, further improving the stability and firmness of the assembly fixation, and thus improving the service life of the overload protector.

[0041] Furthermore, a reinforcing rib 26 is fixedly arranged on the inner wall of the second housing 2. During operation, the reinforcing rib 26 arranged on the inner wall of the second housing 2 improves the structural strength of the second housing 2, thereby improving the structural strength and service life of the overload protector.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An overload protector, comprising a first housing (1) and a second housing (2), characterized in that: A mounting tube (3) is arranged between the first shell (1) and the second shell (2), a retaining ring (4) and a limiting ring (5) are fixedly arranged on the mounting tube (3), the limiting ring (5) is of a polygonal structure, a thread (6) is provided on the mounting tube (3), a button (27) is movably inserted in the mounting tube (3), a retaining ring (28) is fixedly arranged on the button (27), a spring (7) is sleeved on the button (27), and the spring (7) is located in the mounting tube (3), and its two ends are respectively abutted against the retaining ring (28) and the inner wall of the mounting tube (3), the first shell (1) and the second shell (2) are both provided with mounting grooves (8) opposite to each other, and when the mounting tube (3) is assembled, the groove between the retaining ring (4) and the limiting ring (5) is assembled with the mounting groove (8).

2. An overload protector according to claim 1, characterized in that: A first wiring plug slot (9) and a second wiring plug slot (10) are fixedly arranged in the first housing (1), and a first wiring plug slot (11) and a second wiring plug slot (12) are respectively mounted in the first wiring plug slot (9) and the second wiring plug slot (10), a memory spring (13) is fixedly arranged on the first wiring plug slot (11), and the memory spring (13) is horizontally arranged inside the first housing (1) and the second housing (2), a first contact (14) is fixedly arranged on the memory spring (13), and a second contact (15) is fixedly arranged on the second wiring plug slot (12).

3. An overload protector according to claim 2, characterized in that: The first housing (1) and the second housing (2) are both provided with card slots (16) opposite to each other, and the first wiring plug-in sheet (11) and the second wiring plug-in sheet (12) are both provided with slots (17) corresponding to the card slots (16).

4. An overload protector according to claim 1, characterized in that: Limit blocks (18) are fixedly disposed on the inner walls of the first shell (1) and the second shell (2) in an opposed manner, and the limit blocks (18) are used to limit the lowest point of pressing the button (27).

5. The overload protector according to claim 1, characterized in that: At least two positioning columns (19) are fixedly arranged in the first shell (1), positioning grooves (20) corresponding to the positioning columns (19) are arranged in the second shell (2), and sliding grooves (21) cooperating with the positioning columns (19) are arranged on the inner wall of the second shell (2).

6. An overload protector according to claim 1, characterized in that: At least two first fixing columns (22) are fixedly arranged inside the second shell (2), and first fixing holes (23) corresponding to the first fixing columns (22) are fixedly arranged inside the first shell (1) for fixedly assembling the first shell (1) and the second shell (2).

7. An overload protector according to claim 6, characterized in that: The diameter of the first fixing hole (23) is smaller than the diameter of the first fixing column (22).

8. An overload protector according to claim 7, characterized in that: A bevel chamfer is provided at the entrance of the first fixing hole (23).

9. An overload protector according to claim 1, characterized in that: A second fixing column (24) is fixedly arranged in the second shell (2), and a second fixing hole (25) corresponding to the second fixing column (24) is fixedly arranged in the first shell (1).

10. An overload protector according to claim 1, characterized in that: The inner wall of the second shell (2) is fixedly provided with a reinforcing rib (26).

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