Protective shell of starting switch

Abstract

The utility model discloses a starting switch protective shell, which comprises a protective shell, the protective shell wraps the outer side of an electromagnetic switch, two ends of a main body of the electromagnetic switch are respectively provided with a first annular plate, and the protective shell is connected with the first annular plates and is not contacted with the main body. The outer side surface and the arc-shaped surface of the first annular plate are positioned on the same curved surface; according to the utility model, the protection layer is arranged to form protection on the outer side of the electromagnetic switch, thereby counteracting impact force of foreign matters, and avoiding the phenomenon of magnetic flux leakage caused by shell breakage of the electromagnetic switch; as the protective layer is not in contact with the electromagnetic switch, a component on the inner side of the electromagnetic switch is slightly influenced when a foreign matter collides with the protective layer.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic switches, in particular to a starting switch protection shell. Background Art

[0002] The electromagnetic switch is used as the control switch of the starter. It controls the on and off of the circuit, and then controls the operation of the starter. Therefore, it is also called the start switch. In order to realize the function of the electromagnetic switch, it is provided with an electromagnet coil, a movable iron core, etc. When working, the electromagnet coil generates electromagnetic attraction after being energized, and the movable iron core pushes or pulls the switch contacts to close, thereby connecting the controlled circuit.

[0003] There are many types of electromagnetic switches, but all of them are equipped with an electromagnet coil and a movable iron core. For example, an electromagnetic switch disclosed in a Chinese patent with publication number CN102456514A includes a first frame and a second frame; a fixed contact facing the second frame; a movable contact, which is in contact with or separated from the fixed contact; a coil group, which generates magnetic force according to the flow of current; a movable unit, which makes the movable contact contact with or separate from the fixed contact; a contact spring, which applies an elastic force to the movable contact in the direction in which the movable contact moves toward the fixed contact; a movement distance limiting unit, which limits the movement distance of the movable unit to determine the contact pressure distance at which the movable contact contacts the fixed contact and the contact spring is compressed; and a reset spring, which applies an elastic force to the movable unit in the direction in which the movable contact separates from the fixed contact.

[0004] When producing electromagnetic switches, the electromagnet coil, movable iron core and other components need to be placed in the shell. In order to avoid magnetic leakage, the welding method of the shell and the base plate is changed, that is, the shell is set as an integral structure, and the magnetic flux is increased at the same time.

[0005] However, in actual use, the electromagnetic switch is usually exposed and installed outside the starter. Since the outer shell of the electromagnetic switch lacks protective parts, it is easily hit by foreign objects during use. Under the action of the impact force, the shell of the electromagnetic switch may be deformed inwards at best, or even ruptured in severe cases, causing magnetic leakage and even reducing magnetic flux, thus affecting the performance of the electromagnetic switch. Utility Model Content

[0006] The utility model aims to provide a start switch protection shell, aiming to improve the problem that the electromagnetic switch lacks a protective part, the shell breaks under the impact of foreign objects, and the performance of the electromagnetic switch is affected.

[0007] The utility model is implemented as follows: a starting switch protective shell includes a protective shell, which is wrapped around the outside of the electromagnetic switch, and a first annular plate is arranged at both ends of the main body of the electromagnetic switch. The protective shell is connected to the first annular plate and does not contact the main body. At the same time, the outer side surface and the arc surface of the first annular plate are located on the same curved surface.

[0008] Preferably, a second annular plate may be further provided on the main body, the outer diameter of the second annular plate being smaller than the outer diameter of the first annular plate, and the inner side surface of the protective shell contacts the outer side surface of the second annular plate.

[0009] Preferably, a stepped annular groove is provided on the side walls of the two first annular plates close to each other, the thickness of the stepped annular groove is equal to the thickness of the protective shell, and the end of the protective shell extends into the stepped annular groove.

[0010] Preferably, a third annular plate may be provided on the main body, the outer diameter of the third annular plate being equal to the outer diameter of the first annular plate, at least two independent protective shells are provided, and the two protective shells are respectively arranged in the space formed by the third annular plate and the two first annular plates.

[0011] Preferably, stepped annular grooves are provided on the side walls of the two first annular plates close to each other and on the side wall of the third annular plate, and the end of the protective shell extends into the stepped annular groove.

[0012] Preferably, a plurality of perforations are provided on the first annular plate adjacent to the terminal, and a plurality of slots are provided on the other first annular plate. The slots and perforations are both arranged as arc structures and are evenly distributed along the circumference of the annular plate, and the slots and perforations are opposite to each other.

[0013] Preferably, a plurality of independent protective shells are provided, and the plurality of protective shells are evenly distributed along the circumferential direction of the main body; one end of the protective shell is inserted into the slot, the other end extends into the through hole, and the wiring terminal contacts the end of the protective shell.

[0014] Preferably, a plurality of perforations are provided on the first annular plate away from the wiring terminal, and a plurality of slots are provided on the other first annular plate. The slots and the perforations are both arranged in an arc-shaped structure and are evenly distributed along the circumference direction of the annular plate, and the slots and the perforations are opposite to each other one by one; a fourth annular plate is provided on the side of the first annular plate with perforations and is connected by bolts.

[0015] Preferably, a plurality of independent protective shells are provided, and the plurality of protective shells are evenly distributed along the circumferential direction of the main body; one end of the protective shell is inserted into the slot, and the other end extends into the through hole, and the fourth annular plate contacts the end of the protective shell.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a protective layer, which can form protection on the outside of the electromagnetic switch, offset the impact of foreign objects, and avoid the phenomenon of magnetic leakage caused by the rupture of the electromagnetic switch shell; because the protective layer does not contact the electromagnetic switch, therefore, when foreign objects hit the protective layer, it has less impact on the components inside the electromagnetic switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a structural schematic diagram of the electromagnetic switch and the protective shell of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the electromagnetic switch of the utility model;

[0019] Figure 3 This is a first structural schematic diagram of the main body and protective shell of the utility model;

[0020] Figure 4 This is a second structural schematic diagram of the main body and the protective shell of the utility model;

[0021] Figure 5 It is a third structural schematic diagram of the main body and the protective shell of the utility model;

[0022] Figure 6 It is a first structural schematic diagram of the main body of the utility model;

[0023] Figure 7 It is a fourth structural schematic diagram of the main body and the protective shell of the utility model;

[0024] Figure 8 It is a second structural schematic diagram of the main body of the utility model.

[0025] In the figure: 1. electromagnetic switch; 11. terminal; 12. main body; 13. first annular plate; 14. second annular plate; 15. stepped annular groove; 16. third annular plate; 17. slot; 18. through hole; 19. fourth annular plate; 2. protective shell. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0028] Example 1

[0029] like Figure 1 , Figure 2As shown in the background technology, if a foreign object hits the electromagnetic switch, the shell of the electromagnetic switch will rupture, which will cause magnetic leakage, thereby affecting the performance of the electromagnetic switch. In order to solve this problem, this embodiment provides a protective layer on the outside of the existing electromagnetic switch, so that the impact force of the foreign object on the electromagnetic switch can be offset by the protective layer, avoiding the electromagnetic switch shell from easily rupturing.

[0030] The structure of the existing electromagnetic switch has been disclosed, which mainly includes a moving iron core, a solenoid coil, a brass shaft, a return spring, etc. The moving iron core of the electromagnetic switch can move smoothly in the brass sleeve equipped with the solenoid coil, and the moving iron core pull rod is connected through a fork one-way device. Under the action of the return spring, the moving iron core is usually kept in an initial position where it is not working. When starting, the starter drive gear needs to move forward by about 12-20mm. Therefore, when the electromagnetic switch starts to be attracted, a large magnetic potential is required to generate the necessary initial suction force. After the attraction, the air gap is reduced, and the electromagnetic suction force increases sharply, greatly exceeding the force required to maintain the attracted state. For this reason, the electromagnetic switch uses two coils (attracting coil and holding coil). At the beginning, the electromagnetic suction force is jointly generated by the attracting coil and the holding coil. When the switch contacts are attracted, the attracting coil is automatically out of the working state, and the switch is attracted by the holding coil alone. The current of the holding coil is relatively small, and it can be wound with a thinner wire. In this way, the volume of the electromagnetic switch can be reduced and a reasonable suction force matching can be achieved. Since the electromagnetic switch is a prior art and this embodiment does not improve the original function of the electromagnetic switch, it will not be introduced in detail here.

[0031] like Figure 1 , Figure 2 As shown, the protective layer includes a protective shell 2, which is formed by bending an iron product and is wrapped around the outside of the electromagnetic switch 1. The two ends of the protective shell 2 are welded together, and a first annular plate 13 is provided at both ends of the main body 12 of the electromagnetic switch 1. The protective shell 2 is located between the two first annular plates 13 and is welded together with the first annular plates 13. In addition, the thickness of the protective shell 2 is less than the thickness of the space formed by the two first annular plates 13. Therefore, the protective shell 2 does not contact the main body 12, and the outer side surface and the arc surface of the first annular plate 13 are located on the same curved surface.

[0032] like Figure 3 As shown, in order to enhance the compressive strength of the protective shell 2, a second annular plate 14 may be further provided on the main body 12. The outer diameter of the second annular plate 14 is smaller than the outer diameter of the first annular plate 13. The inner side surface of the protective shell 2 contacts the outer side surface of the second annular plate 14. With the support of the second annular plate 14, the protective shell 2 may be installed more stably and its ability to resist external forces may be enhanced.

[0033] like Figure 3As shown, in order to reduce the welding process of installing the protective shell 2, a stepped annular groove 15 can be provided on the side walls of the two first annular plates 13 close to each other, and the thickness of the stepped annular groove 15 is equal to the thickness of the protective shell 2, and the end of the protective shell 2 extends into the stepped annular groove 15. This arrangement can force the protective shell 2 to be tightly wrapped on the main body 12 by welding the adjacent two ends of the protective shell 2, and at the same time, the end of the protective shell 2 is stably supported on the stepped annular groove 15.

[0034] Example 2

[0035] like Figure 1 , Figure 2 As shown in the background technology, if a foreign object hits the electromagnetic switch, the shell of the electromagnetic switch will rupture, which will cause magnetic leakage, thereby affecting the performance of the electromagnetic switch. In order to solve this problem, this embodiment provides a protective layer on the outside of the existing electromagnetic switch, so that the impact force of the foreign object on the electromagnetic switch can be offset by the protective layer, avoiding the electromagnetic switch shell from easily rupturing.

[0036] The structure of the existing electromagnetic switch has been disclosed, which mainly includes a moving iron core, a solenoid coil, a brass shaft, a return spring, etc. The moving iron core of the electromagnetic switch can move smoothly in the brass sleeve equipped with the solenoid coil, and the moving iron core pull rod is connected through a fork one-way device. Under the action of the return spring, the moving iron core is usually kept in an initial position where it is not working. When starting, the starter drive gear needs to move forward by about 12-20mm. Therefore, when the electromagnetic switch starts to be attracted, a large magnetic potential is required to generate the necessary initial suction force. After the attraction, the air gap is reduced, and the electromagnetic suction force increases sharply, greatly exceeding the force required to maintain the attracted state. For this reason, the electromagnetic switch uses two coils (attracting coil and holding coil). At the beginning, the electromagnetic suction force is jointly generated by the attracting coil and the holding coil. When the switch contacts are attracted, the attracting coil is automatically out of the working state, and the switch is attracted by the holding coil alone. The current of the holding coil is relatively small, and it can be wound with a thinner wire. In this way, the volume of the electromagnetic switch can be reduced and a reasonable suction force matching can be achieved. Since the electromagnetic switch is a prior art and this embodiment does not improve the original function of the electromagnetic switch, it will not be introduced in detail here.

[0037] The protective layer includes a protective shell 2, which is formed by bending an iron product and is wrapped around the outside of the electromagnetic switch 1. The two ends of the protective shell 2 are welded together. A first annular plate 13 is provided at both ends of the main body 12 of the electromagnetic switch 1. The protective shell 2 is located between the two first annular plates 13. In addition, the thickness of the protective shell 2 is less than the thickness of the space formed by the two first annular plates 13. Therefore, the protective shell 2 does not contact the main body 12, and the outer side surface and the arc surface of the first annular plate 13 are located on the same curved surface.

[0038] like Figure 4As shown, in order to reduce the resistance of the protective shell 2 when it is bent, multiple protective shells 2 with smaller sizes can be arranged on the outside of the main body 12. At this time, a third annular plate 16 can be arranged on the main body 12, and the outer diameter of the third annular plate 16 is equal to the outer diameter of the first annular plate 13. At least two independent protective shells 2 are arranged, and the two protective shells 2 are respectively arranged in the space formed by the third annular plate 16 and the two first annular plates 13. At this time, the ends of the protective shells 2 and the contact positions with the annular plates are welded and connected.

[0039] like Figure 4 As shown, similarly, in order to reduce the welding process for installing the protective shell 2, stepped annular grooves 15 can also be provided on the side walls of the two first annular plates 13 close to each other and on the side walls of the third annular plate 16, and the end of the protective shell 2 extends into the stepped annular groove 15.

[0040] Example 3

[0041] like Figure 1 , Figure 2 As shown in the background technology, if a foreign object hits the electromagnetic switch, the shell of the electromagnetic switch will rupture, which will cause magnetic leakage, thereby affecting the performance of the electromagnetic switch. In order to solve this problem, this embodiment provides a protective layer on the outside of the existing electromagnetic switch, so that the impact force of the foreign object on the electromagnetic switch can be offset by the protective layer, avoiding the electromagnetic switch shell from easily rupturing.

[0042] The structure of the existing electromagnetic switch has been disclosed, which mainly includes a moving iron core, a solenoid coil, a brass shaft, a return spring, etc. The moving iron core of the electromagnetic switch can move smoothly in the brass sleeve equipped with the solenoid coil, and the moving iron core pull rod is connected through a fork one-way device. Under the action of the return spring, the moving iron core is usually kept in an initial position where it is not working. When starting, the starter drive gear needs to move forward by about 12-20mm. Therefore, when the electromagnetic switch starts to be attracted, a large magnetic potential is required to generate the necessary initial suction force. After the attraction, the air gap is reduced, and the electromagnetic suction force increases sharply, greatly exceeding the force required to maintain the attracted state. For this reason, the electromagnetic switch uses two coils (attracting coil and holding coil). At the beginning, the electromagnetic suction force is jointly generated by the attracting coil and the holding coil. When the switch contacts are attracted, the attracting coil is automatically out of the working state, and the switch is attracted by the holding coil alone. The current of the holding coil is relatively small, and it can be wound with a thinner wire. In this way, the volume of the electromagnetic switch can be reduced and a reasonable suction force matching can be achieved. Since the electromagnetic switch is a prior art and this embodiment does not improve the original function of the electromagnetic switch, it will not be introduced in detail here.

[0043] The protective layer includes a protective shell 2, which is wrapped around the outside of the electromagnetic switch 1. First annular plates 13 are provided at both ends of the main body 12 of the electromagnetic switch 1. The protective shell 2 is located between the two first annular plates 13. In addition, the thickness of the protective shell 2 is less than the thickness of the space formed by the two first annular plates 13. Therefore, the protective shell 2 does not contact the main body 12, and the outer side surface is on the same curved surface as the arc surface of the first annular plate 13.

[0044] like Figure 5 , Figure 6 As shown, in order to completely eliminate the welding process, a plurality of perforations 18 can be provided on the first annular plate 13 adjacent to the terminal 11, and a plurality of slots 17 can be provided on the other first annular plate 13. The slots 17 and the perforations 18 are both arranged in an arc structure and are evenly distributed along the circumference direction of the annular plate, and the slots 17 and the perforations 18 are opposite to each other. A plurality of independent protective shells 2 are provided, and the plurality of protective shells 2 are evenly distributed along the circumference direction of the main body 12. One end of the protective shell 2 is inserted into the slot 17, and the other end is extended into the perforation 18, and the terminal 11 is in contact with the end of the protective shell 2. Under the action of the slot 17 and the perforation 18, the protective shell 2 is stably installed on the two first annular plates 13, and under the action of the terminal 11, the position of the protective shell 2 is limited, so that the protective shell 2 is stably installed. In addition, because the terminal 11 is connected to the end of the main body 12 by bolts, the restriction of the protective shell 2 can be released by disassembling the terminal 11, which provides convenience for disassembling the protective shell 2.

[0045] Example 4

[0046] like Figure 1 , Figure 2 As shown in the background technology, if a foreign object hits the electromagnetic switch, the shell of the electromagnetic switch will rupture, which will cause magnetic leakage, thereby affecting the performance of the electromagnetic switch. In order to solve this problem, this embodiment provides a protective layer on the outside of the existing electromagnetic switch, so that the impact force of the foreign object on the electromagnetic switch can be offset by the protective layer, avoiding the electromagnetic switch shell from easily rupturing.

[0047] The structure of the existing electromagnetic switch has been disclosed, which mainly includes a moving iron core, a solenoid coil, a brass shaft, a return spring, etc. The moving iron core of the electromagnetic switch can move smoothly in the brass sleeve equipped with the solenoid coil, and the moving iron core pull rod is connected through a fork one-way device. Under the action of the return spring, the moving iron core is usually kept in an initial position where it is not working. When starting, the starter drive gear needs to move forward by about 12-20mm. Therefore, when the electromagnetic switch starts to be attracted, a large magnetic potential is required to generate the necessary initial suction force. After the attraction, the air gap is reduced, and the electromagnetic suction force increases sharply, greatly exceeding the force required to maintain the attracted state. For this reason, the electromagnetic switch uses two coils (attracting coil and holding coil). At the beginning, the electromagnetic suction force is jointly generated by the attracting coil and the holding coil. When the switch contacts are attracted, the attracting coil is automatically out of the working state, and the switch is attracted by the holding coil alone. The current of the holding coil is relatively small, and it can be wound with a thinner wire. In this way, the volume of the electromagnetic switch can be reduced and a reasonable suction force matching can be achieved. Since the electromagnetic switch is a prior art and this embodiment does not improve the original function of the electromagnetic switch, it will not be introduced in detail here.

[0048] The protective layer includes a protective shell 2, which is wrapped around the outside of the electromagnetic switch 1. First annular plates 13 are provided at both ends of the main body 12 of the electromagnetic switch 1. The protective shell 2 is located between the two first annular plates 13. In addition, the thickness of the protective shell 2 is less than the thickness of the space formed by the two first annular plates 13. Therefore, the protective shell 2 does not contact the main body 12, and the outer side surface is on the same curved surface as the arc surface of the first annular plate 13.

[0049] like Figure 7 , Figure 8 As shown, in order to completely eliminate the welding process, a plurality of perforations 18 may be provided on the first annular plate 13 away from the terminal 11, and a plurality of slots 17 may be provided on the other first annular plate 13. The slots 17 and the perforations 18 are both arranged in an arc structure and are evenly distributed along the circumference direction of the annular plate, and the slots 17 and the perforations 18 are opposite to each other. A plurality of independent protective shells 2 are provided, and the plurality of protective shells 2 are evenly distributed along the circumference direction of the main body 12. One end of the protective shell 2 is inserted into the slot 17, and the other end is extended into the perforation 18. A fourth annular plate 19 is provided on the side of the first annular plate 13 with the perforation 18 by bolts, and the fourth annular plate 19 is in contact with the end of the protective shell 2. Under the action of the slots 17 and the perforations 18, the protective shell 2 is stably installed on the two first annular plates 13, and under the action of the fourth annular plate 19, the position of the protective shell 2 is limited, so that the protective shell 2 is stably installed. In addition, since the fourth annular plate 19 is connected and arranged at the end of the main body 12 by bolts, the restriction of the protective shell 2 can be released by removing the fourth annular plate 19, which provides convenience for removing the protective shell 2.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A start switch protective housing, characterized in that: The invention comprises a protective shell (2), wherein the protective shell (2) is wrapped around the outside of an electromagnetic switch (1), and first annular plates (13) are arranged at both ends of a main body (12) of the electromagnetic switch (1). The protective shell (2) is connected to the first annular plate (13) and does not contact the main body (12), and the outer side surface and the arc surface of the first annular plate (13) are located on the same curved surface.

2. A start switch protection housing according to claim 1, characterized in that: A second annular plate (14) may also be provided on the main body (12), the outer diameter of the second annular plate (14) being smaller than the outer diameter of the first annular plate (13), and the inner side surface of the protective shell (2) being in contact with the outer side surface of the second annular plate (14).

3. A start switch protection housing according to claim 2, characterized in that: A stepped annular groove (15) is provided on the side walls of the two first annular plates (13) close to each other. The thickness of the stepped annular groove (15) is equal to the thickness of the protective shell (2), and the end of the protective shell (2) extends into the stepped annular groove (15).

4. The starting switch protection housing according to claim 1, characterized in that: A third annular plate (16) may be arranged on the main body (12), the outer diameter of the third annular plate (16) being equal to the outer diameter of the first annular plate (13), at least two independent protective shells (2) are arranged, and the two protective shells (2) are respectively arranged in a space formed by the third annular plate (16) and the two first annular plates (13).

5. A start switch protection housing according to claim 4, characterized in that: Stepped annular grooves (15) are provided on the side walls of the two first annular plates (13) that are close to each other and on the side wall of the third annular plate (16), and the end of the protective shell (2) extends into the stepped annular groove (15).

6. The starting switch protection housing according to claim 1, characterized in that: A plurality of through holes (18) are arranged on a first annular plate (13) adjacent to the terminal (11), and a plurality of slots (17) are arranged on another first annular plate (13). The slots (17) and the through holes (18) are both arranged in an arc-shaped structure and are evenly distributed along the circumference of the annular plate. At the same time, the slots (17) and the through holes (18) are opposite to each other.

7. A start switch protection housing according to claim 6, characterized in that: The protective shell (2) is provided with a plurality of independent ones, and the plurality of protective shells (2) are evenly distributed along the circumferential direction of the main body (12); one end of the protective shell (2) is inserted into the slot (17), and the other end extends into the through hole (18), and the wiring terminal (11) contacts the end of the protective shell (2).

8. The starting switch protection housing according to claim 1, characterized in that: A plurality of through holes (18) are arranged on a first annular plate (13) away from a terminal (11), and a plurality of slots (17) are arranged on another first annular plate (13). The slots (17) and the through holes (18) are both arranged in an arc-shaped structure and are evenly distributed along the circumference of the annular plate. The slots (17) and the through holes (18) are opposite to each other. A fourth annular plate (19) is arranged on the side of the first annular plate (13) having the through holes (18) and is connected by bolts.

9. A start switch protection housing according to claim 8, characterized in that: The protective shell (2) is provided in a plurality of independent ones, and the plurality of protective shells (2) are evenly distributed along the circumferential direction of the main body (12); one end of the protective shell (2) is inserted into the slot (17), and the other end extends into the through hole (18), and the fourth annular plate (19) is in contact with the end of the protective shell (2).

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