Automobile relay with dust adsorption function

Abstract

The utility model belongs to the technical field of relays, in particular to an automobile relay with a dust adsorption function, which is characterized in that the automobile relay comprises a shell, and an upper cavity and a lower cavity are arranged in the shell; the executing mechanism is arranged in the upper cavity, the executing mechanism comprises a static contact piece, a movable contact piece, a static contact and a movable contact, the control mechanism comprises a coil assembly, a movable iron core and a moving shaft, a mounting cavity allowing the movable iron core to move up and down is formed in the coil assembly, and the two ends of the moving shaft are connected with the movable iron core and the movable contact piece respectively; the adsorption block is arranged on the static contact piece and is used for adsorbing dust impurities in the upper cavity; when the movable iron core moves upwards, gas in the mounting cavity can enter the upper cavity through the gas flow channel, and disturbance on gas flow in the upper cavity is achieved. The beneficial effects of the utility model are that the relay can effectively reduce the accumulation of dust and impurities on the surface of or near the contact in the relay, adsorb and collect the dust and impurities, and prolong the service life of the relay.

Description

Technical Field

[0001] The utility model belongs to the technical field of relays, in particular to an automobile relay with a dust adsorption function. Background Art

[0002] A relay is an automatic control device whose output changes dramatically when the input reaches a certain value. Automotive relays are used in automobiles. These relays have high load switching power and are highly resistant to shock and vibration. Existing automotive relays generally consist of an iron core, a coil, an armature, and moving and stationary contacts. When current flows through the coil, an electromagnetic force is generated, which attracts the armature, causing the moving contact of the moving contact to contact the stationary contact of the stationary contact. When the current in the coil disappears, the electromagnetic force dissipates, the armature resets, and the moving contact of the moving contact separates from the stationary contact of the stationary contact. By controlling the contact and separation of the moving and stationary contacts through the attraction and separation of the armature and the iron core, the circuit is controlled on and off.

[0003] However, during the operation of automotive relays, due to long-term use, wear will occur between the contacts, resulting in a certain amount of dust and impurities in the relay. The dust and impurities in the relay stay near or adhere to the contacts, which may cause a short circuit or poor contact of the contacts, thereby causing damage to the relay and reducing the service life of the relay. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned technical problems and provide an automotive relay with a dust adsorption function, which can effectively reduce the accumulation of dust impurities on or near the contact surface of the relay, and adsorb and collect dust impurities, thereby extending the service life of the relay.

[0005] The purpose of the utility model is achieved as follows: an automobile relay with a dust adsorption function, comprising:

[0006] a housing, wherein an upper cavity and a lower cavity are provided in the housing;

[0007] an actuator disposed in the upper cavity, the actuator comprising a static contact piece, a movable contact piece, a static contact point, and a movable contact point, the movable contact point being disposed on the movable contact piece, the static contact point being disposed on the static contact piece, and the static contact point being located below the movable contact point;

[0008] A control mechanism is disposed in the lower cavity, comprising a coil assembly, a moving iron core, and a movable shaft. The coil assembly is provided with a mounting cavity for the moving iron core to move up and down, and the two ends of the movable shaft are respectively connected to the moving iron core and the moving contact piece;

[0009] An adsorption block is provided on the static contact piece and is used to adsorb dust and impurities in the upper cavity;

[0010] An air flow channel is provided between the installation cavity and the upper cavity; when the moving iron core moves upward, the gas in the installation cavity will enter the upper cavity through the air flow channel, thereby disturbing the air flow in the upper cavity.

[0011] The utility model is further configured as follows: a storage groove is provided in the air flow channel, a stabilizing ring is provided in the storage groove, ventilation holes are evenly provided around the stabilizing ring, the stabilizing ring is sleeved on the movable shaft, and the stabilizing ring is slidably connected to the movable shaft.

[0012] The present invention is further configured as follows: an air guide portion is provided at the bottom of the static contact piece, and the air guide portion is communicated with the air flow channel.

[0013] The utility model is further configured as follows: the coil assembly includes:

[0014] A fixed block is provided below the moving iron core, the fixed block is provided with a through hole, and the movable shaft is inserted into the through hole;

[0015] A return spring is provided between the fixed block and the movable iron core. The return spring is sleeved on the movable shaft. One end of the return spring abuts against the bottom of the movable iron core, and the other end abuts against the top of the fixed block.

[0016] The electromagnetic coil is arranged in the lower cavity, and the electromagnetic coil is arranged outside the installation cavity.

[0017] The present invention is further configured as follows: a first limiting ring and a second limiting ring are provided on the movable shaft, the first limiting ring is arranged above the second limiting ring, and the movable contact piece is arranged between the first limiting ring and the second limiting ring.

[0018] The utility model is further configured as follows: the actuator further includes:

[0019] A contact spring is provided between the first limiting ring and the movable contact piece, one end of the contact spring abuts against the bottom of the first limiting ring, and the other end abuts against the top of the movable contact piece.

[0020] The utility model is further configured as follows: a clamping groove is provided on the adsorption block, a clamping protrusion is provided on the static contact piece, and the clamping protrusion is clamped with the clamping groove.

[0021] By adopting the above technical solution, the utility model has at least the following beneficial effects:

[0022] 1. When the relay is working, the control mechanism controls the moving iron core and the moving shaft in the installation cavity to move up and down. When the moving contact and the static contact are closed, the moving iron core descends, the circuit is connected, and there is gas between the moving iron core and the air flow channel. When the moving contact and the static contact are reset, the control mechanism drives the moving iron core and the moving shaft to move upward. At this time, the air in the installation cavity enters the upper cavity through the air flow channel, disturbing the air in the upper cavity and blowing the dust impurities near the moving contact and the static contact to the adsorption block. The adsorption block adsorbs and collects the dust impurities, thereby reducing the impact of dust impurities on the operation of the relay and extending the service life of the relay.

[0023] 2. The stabilizing ring is used to limit the moving shaft. The stabilizing ring can improve the stability of the moving shaft when it moves up and down, prevent the moving shaft from tilting when it moves up and down, resulting in poor contact between the moving contact and the static contact, and improve the stability of the relay operation. A through hole is set on the stabilizing ring, and the gas in the lower cavity can enter the upper cavity through the through hole, thereby blowing dust impurities toward the adsorption block.

[0024] 3. When the moving contact and the static contact are reset and separated, the airflow passing between the moving contact and the static contact can reduce the temperature between the moving contact and the static contact, thereby reducing or inhibiting the generation of arc between the moving contact and the static contact during reset and separation, protecting the contacts and extending the service life of the relay.

[0025] 4. An air guide is provided at the bottom of the static contact piece, which is connected to the air flow channel. The air from the installation cavity into the upper cavity can be concentrated and guided to the moving contact and the static contact, thereby enhancing the blowing effect of the gas on the dust impurities, improving the adsorption efficiency of the adsorption block on the dust impurities, and at the same time enhancing the cooling effect of the air on the moving contact and the static contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of an automobile relay with a dust adsorption function according to the present invention;

[0027] Figure 2 This is a cross-sectional view of the automobile relay with dust adsorption function in the reset state of the utility model;

[0028] Figure 3 This is a cross-sectional view of the automobile relay with dust adsorption function in the closed state of the utility model;

[0029] Figure 4 It is an enlarged view of part A of the utility model;

[0030] Figure 5 It is an enlarged view of part B of the present utility model;

[0031] Figure 6 It is a schematic diagram of the actuator of the utility model;

[0032] Figure 71 is a schematic diagram of a stabilizing ring of the present invention;

[0033] The figures are marked as follows: 1-shell, 2-actuator, 3-air flow channel, 4-control mechanism, 5-adsorption block, 11-upper cavity, 12-lower cavity, 21-static contact piece, 22-moving contact piece, 23-static contact, 24-moving contact, 25-air guide part, 26-contact spring, 31-storage slot, 32-stabilizing ring, 33-ventilation hole, 41-installation cavity, 42-moving shaft, 43-moving iron core, 44-fixed block, 45-reset spring, 46-electromagnetic coil, 51-clamping groove, 421-first limiting ring, 422-second limiting ring, 211-clamping protrusion, 441-through hole. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further described in subsequent figures.

[0036] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-7 :

[0037] Example 1.

[0038] This embodiment provides an automotive relay with a dust adsorption function, comprising:

[0039] The housing 1 includes an upper cavity 11 and a lower cavity 12;

[0040] The actuator 2 is disposed in the upper cavity 11 and includes a static contact piece 21, a movable contact piece 22, a static contact point 23, and a movable contact point 24. The movable contact point 24 is disposed on the movable contact piece 22, and the static contact point 23 is disposed on the static contact piece 21, and the static contact point 23 is located below the movable contact point 24.

[0041] The control mechanism 4 is disposed in the lower cavity 12 and includes a coil assembly, a moving iron core 43, and a movable shaft 42. The coil assembly is provided with a mounting cavity 41 for the moving iron core 43 to move up and down. The ends of the movable shaft 42 are respectively connected to the moving iron core 43 and the movable contact piece 22.

[0042] The adsorption block 5 is provided on the static contact piece 21 and is used to adsorb dust impurities in the upper cavity 11;

[0043] Among them, an air flow channel 3 is provided between the installation cavity 41 and the upper cavity 11; when the moving iron core 43 moves upward, the gas in the installation cavity 41 will enter the upper cavity 11 through the air flow channel 3, thereby disturbing the air flow in the upper cavity 11.

[0044] like Figure 1-6 As shown, one end of the movable shaft 42 is arranged in the upper cavity 11, and the other end passes through the air flow channel 3 and is inserted into the installation cavity 41. The movable iron core 43 is sleeved and fixed with the movable shaft 42, and the movable iron core 43 is slidingly connected with the inner wall of the installation cavity 41. The control mechanism 4 can control the movable iron core 43 and the movable shaft 42 to move up and down. The movable contact piece 22 is sleeved and fixed with the movable shaft 42. A movable contact 24 is provided at the bottom of the movable contact piece 22. The static contact piece 21 is arranged in the shell 1. A static contact 23 is provided on the static contact piece 21. The static contact 23 is arranged below the moving contact 24. The static contact piece 21 is U-shaped, and an external terminal is provided above the static contact piece 21. One end of the external terminal is connected to the static contact piece 21, and the other end passes through the shell 1 and extends out of the shell 1.

[0045] When the relay is working, the control mechanism 4 controls the moving iron core 43 to move downward, driving the moving shaft 42 to move downward, the moving shaft 42 drives the moving contact piece 22 to move downward, the moving contact piece 22 drives the moving contact 24 downward and contacts the static contact 23. At this time, the circuit is connected, and a gas space is formed between the top of the moving iron core 43 and the air flow channel 3. The moving shaft 42 does not contact the inner wall of the air flow channel 3. There is a gap between the inner wall of the air flow channel 3 and the surface of the moving shaft 42, and gas can pass through the gap.

[0046] When the relay is reset, the control mechanism 4 controls the moving iron core 43 to move upward, the volume of the gas space is reduced, and the gas in the gas space is pushed upward by the moving iron core 43, and the gas enters the upper cavity 11 through the air flow channel 3. The air flow channel 3 and the mounting cavity 41 are both cylindrical, and the inner diameter of the air flow channel 3 is smaller than the inner diameter of the mounting cavity 41. The gas in the mounting cavity 41 is accelerated when entering the upper cavity 11, so that it flows to the upper cavity 11 at a faster speed. At this time, the static contact 23 is separated from the moving contact 24, and the gas flows between the moving contact 24 and the static contact 23 at a faster speed, and disturbs the airflow in the upper cavity 11, blowing the dust impurities between the static contact 23 and the moving contact 24 to the adsorption block 5. The adsorption block 5 adsorbs and collects the dust impurities, reducing the contact and adhesion of the dust impurities in the relay to the moving contact 24 and the static contact 23, thereby reducing the impact of the dust impurities on the operation of the relay and extending the service life of the relay.

[0047] When the relay is reset, the airflow in the gas space passes between the moving contact 24 and the static contact 23, which can effectively reduce the temperature between the moving contact 24 and the static contact 23, reduce or suppress the generation of arcs, protect the safety of the moving contact 24 and the static contact 23, and extend the service life of the relay.

[0048] The moving iron core 43 can be made of materials such as pure iron and copper. In the present invention, silicon steel is preferably used. Silicon steel has excellent magnetic conductivity and low hysteresis loss, which can improve the working efficiency of the relay and has a long service life.

[0049] The moving shaft 42 is made of stainless steel, which has high strength and corrosion resistance, and can effectively extend the service life of the relay.

[0050] Example 2:

[0051] This embodiment provides an automotive relay with a dust adsorption function. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0052] A storage groove 31 is provided in the air flow channel 3 , a stabilizing ring 32 is provided in the storage groove 31 , and ventilation holes 33 are evenly provided around the stabilizing ring 32 . The stabilizing ring 32 is sleeved on the moving shaft 42 and is slidably connected to the moving shaft 42 .

[0053] like Figure 2-4 As shown in Figures 6-7, the stabilizing ring 32 is clamped in the storage groove 31, the stabilizing ring 32 is sleeved on the moving shaft 42, and is slidably connected to the moving shaft 42. The inner wall of the stabilizing ring 32 is in contact with the outer periphery of the moving shaft 42. The stabilizing ring 32 can prevent the moving shaft 42 from shifting during the rising or falling process, thereby causing the contact between the moving contact 24 and the static contact 23 to shift, affecting the stability of the relay's operation.

[0054] Ventilation holes 33 are provided on the stabilizing ring 32 . The ventilation holes 33 are evenly arranged on the stabilizing ring 32 . The air in the upper cavity 11 and the installation cavity 41 can circulate through the ventilation holes 33 .

[0055] The stabilizing ring 32 can be made of materials such as stainless steel. In the present invention, ceramic is preferably used. Ceramics have high hardness, strong wear resistance and corrosion resistance, and a long service life, which can effectively reduce maintenance costs.

[0056] An air guide portion 25 is provided at the bottom of the static contact piece 21 , and the air guide portion 25 is communicated with the air flow channel 3 .

[0057] like Figure 2-6 As shown, the air guide portion 25 includes air guide plates, which are arranged around the air flow channel 3. The air guide plates and the static contact plates 21 are of an integrated design. The bottom of the air guide plates is connected to the shell 1. The air guide plates are arranged on both sides of the air flow channel 3 facing the upper cavity 11. The air guide plates can limit the airflow from the lower cavity 12 to the upper cavity 11 when the actuator 2 is reset. The air guide plates cooperate with the air flow channel 3 to guide the airflow to flow in the direction of the moving contact 24 and the static contact 23, prevent the airflow from escaping outward, improve the adsorption efficiency of the adsorption block 5 on dust impurities, reduce the influence of dust impurities on the moving contact 24 and the static contact 23, and extend the service life of the relay.

[0058] Example 3:

[0059] This embodiment provides an automotive relay with a dust adsorption function. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0060] The control mechanism 4 also includes:

[0061] The fixed block 44 is disposed below the moving iron core 43 and has a through hole 441 formed therein, through which the movable shaft 42 is inserted.

[0062] The return spring 45 is disposed between the fixed block 44 and the movable iron core 43 . The return spring 45 is sleeved on the movable shaft 42 . One end of the return spring 45 abuts against the bottom of the movable iron core 43 , and the other end abuts against the top of the fixed block 44 .

[0063] The electromagnetic coil 46 is disposed in the lower cavity 12 and outside the mounting cavity 41 .

[0064] like Figure 2-3As shown, the fixed block 44 is arranged below the moving iron core 43, and the bottom of the fixed block 44 passes through the shell 1 and extends outward. The fixed block 44 is clamped to the bottom of the shell 1. A through hole 441 is provided at the bottom of the fixed block 44. The moving shaft 42 is inserted into the through hole 441 and contacts the fixed block 44. The moving shaft 42 is slidably connected to the fixed block 44. The current can enter the relay through the fixed block 44, flow to the moving shaft 42, the moving contact 24 and the static contact 23, and finally be discharged through the external terminal.

[0065] The reset spring 45 is arranged between the moving iron core 43 and the fixed block 44. When the relay is reset and disconnected, the reset spring 45 can provide an upward elastic force for the moving iron core 43, causing the moving iron core 43 to move upward, driving the moving shaft 42 and the moving contact piece 22 upward, thereby separating the moving contact 24 from the static contact 23.

[0066] The electromagnetic coil 46 is arranged outside the installation cavity 41. When the electromagnetic coil 46 is energized, it can generate a magnetic field. The magnetic field can generate a downward attraction on the moving iron core 43, causing the moving shaft 42 to move downward, and the moving contact 24 and the static contact 23 to close, so that the circuit inside the relay is connected.

[0067] A first limiting ring 421 and a second limiting ring 422 are provided on the movable shaft 42 . The first limiting ring 421 is disposed above the second limiting ring 422 , and the movable contact piece 22 is disposed between the first limiting ring 421 and the second limiting ring 422 .

[0068] like Figure 2-3 As shown in FIG. 6 , a limiting space is formed between the first limiting ring 421 and the second limiting ring 422 , which can limit the movable contact piece 22 and maintain the stability of the movable contact piece 22 in moving up and down.

[0069] A threaded hole is provided at the bottom of the first limiting ring 421, and an external thread is provided at the top of the movable shaft 42. The first limiting ring 421 is threadedly connected to the movable shaft 42, and the second limiting ring 422 and the movable shaft 42 are integrated into one. When the movable contact piece 22 is damaged, the first limiting ring 421 and the movable contact piece 22 can be directly disassembled and replaced, which is convenient for disassembly and assembly and can improve maintenance efficiency and reduce maintenance costs.

[0070] The actuator 2 also includes:

[0071] The contact spring 26 is disposed between the first limiting ring 421 and the movable contact piece 22 . One end of the contact spring 26 abuts against the bottom of the first limiting ring 421 , and the other end abuts against the top of the movable contact piece 22 .

[0072] like Figure 2-3As shown in Figures 6 and 7, the contact spring 26 is sleeved on the movable shaft 42. The contact spring 26 can generate a downward pressure on the moving contact piece 22 when the moving contact 24 and the static contact 23 are in contact and closed, thereby preventing the moving contact 24 and the static contact 23 from deviating when they are in contact and connected, thereby improving the contact stability of the moving contact 24 and the static contact 23.

[0073] At the same time, it can also improve the tightness of the contact between the moving contact 24 and the static contact 23, reduce the friction generated when the moving contact 24 and the static contact 23 are in contact, thereby protecting the moving contact 24 and the static contact 23, reducing the generation of dust and impurities, and extending the service life of the moving contact 24 and the static contact 23.

[0074] A clamping groove 51 is provided on the adsorption block 5 , and a clamping protrusion 211 is provided on the static contact piece 21 . The clamping protrusion 211 is clamped with the clamping groove 51 .

[0075] like Figure 3 、 5 As shown, the snap-fit ​​groove 51 and the snap-fit ​​protrusion 211 are both T-shaped. The snap-fit ​​groove 51 and the snap-fit ​​protrusion 211 cooperate to fix the adsorption block 5 on the static contact piece 21, thereby improving the stability of the adsorption block 5 and preventing the adsorption block 5 from falling during use and affecting the operation of the relay.

[0076] The adsorption block 5 is made of a cured silicone adhesive with good bonding effect. It can adsorb and collect metal and non-metal dust impurities. It has stable chemical properties, good insulation and corrosion resistance, and a long service life. It can effectively adsorb dust impurities in the relay, reduce the impact of dust impurities on the moving contact 24 and the static contact 23, and extend the service life of the relay.

[0077] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automotive relay with a dust adsorption function, characterized in that: include: A housing (1), wherein an upper cavity (11) and a lower cavity (12) are provided in the housing (1); An actuator (2) is arranged in the upper cavity (11), the actuator (2) comprising a static contact piece (21), a movable contact piece (22), a static contact point (23) and a movable contact point (24), the movable contact point (24) being arranged on the movable contact piece (22), the static contact point (23) being arranged on the static contact piece (21), and the static contact point (23) being located below the movable contact point (24); A control mechanism (4) is disposed in the lower cavity (12), and the control mechanism (4) includes a coil assembly, a moving iron core (43), and a movable shaft (42). The coil assembly is provided with a mounting cavity (41) for the moving iron core (43) to move up and down, and the two ends of the movable shaft (42) are respectively connected to the moving iron core (43) and the movable contact piece (22); An adsorption block (5) is provided on the static contact piece (21) and is used for adsorbing dust impurities in the upper cavity (11); An air flow channel (3) is provided between the installation cavity (41) and the upper cavity (11); when the moving iron core (43) moves upward, the gas in the installation cavity (41) enters the upper cavity (11) through the air flow channel (3), thereby disturbing the air flow in the upper cavity (11).

2. The automotive relay with dust adsorption function according to claim 1, characterized in that: A storage groove (31) is provided in the air flow channel (3), a stabilizing ring (32) is provided in the storage groove (31), ventilation holes (33) are evenly arranged around the stabilizing ring (32), the stabilizing ring (32) is sleeved on the movable shaft (42), and the stabilizing ring (32) is slidably connected to the movable shaft (42).

3. The automotive relay with dust adsorption function according to claim 2, characterized in that: An air guide portion (25) is provided at the bottom of the static contact piece (21), and the air guide portion (25) is communicated with the air flow channel (3).

4. The automotive relay with dust adsorption function according to claim 1, characterized in that: The coil assembly comprises: A fixed block (44) is arranged below the moving iron core (43); a through hole (441) is provided on the fixed block (44); and the movable shaft (42) is inserted into the through hole (441); A return spring (45) is provided between the fixed block (44) and the movable iron core (43). The return spring (45) is sleeved on the movable shaft (42). One end of the return spring (45) abuts against the bottom of the movable iron core (43), and the other end abuts against the top of the fixed block (44). An electromagnetic coil (46) is disposed in the lower cavity (12), and the electromagnetic coil (46) is disposed outside the installation cavity (41).

5. The automotive relay with dust adsorption function according to claim 1, characterized in that: A first limiting ring (421) and a second limiting ring (422) are provided on the movable shaft (42); the first limiting ring (421) is arranged above the second limiting ring (422); and the movable contact piece (22) is arranged between the first limiting ring (421) and the second limiting ring (422).

6. The automotive relay with dust adsorption function according to claim 5, characterized in that: The execution mechanism further comprises: A contact spring (26) is arranged between the first limiting ring (421) and the movable contact piece (22), one end of the contact spring (26) abuts against the bottom of the first limiting ring (421), and the other end abuts against the top of the movable contact piece (22).

7. The automotive relay with dust adsorption function according to claim 1, characterized in that: The adsorption block (5) is provided with a clamping groove (51), and the static contact piece (21) is provided with a clamping protrusion (211), and the clamping protrusion (211) is clamped with the clamping groove (51).

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