Noise reduction type electromagnet

Abstract

The utility model discloses a noise reduction type electromagnet which comprises a shell, a containing cavity is formed in the shell, a coil is arranged in the containing cavity, and one end of the coil is limited by an end cover fixedly arranged on the shell. A static armature is fixedly arranged on an inner cavity of the shell, a movable armature arranged on the inner cavity in a sliding mode is arranged on one side of the static armature, a guide shaft is arranged on the movable armature, the guide shaft can penetrate through the static armature, and at least part of the guide shaft extends out of the static armature. An annular groove is formed in the end face, close to the static armature, of the moving armature, an elastic ring is arranged in the annular groove, at least part of the elastic ring extends to be arranged on the outer side of the end face of the moving armature, and the elastic ring can abut against the end face of the static armature. The beneficial effects of the utility model are mainly embodied in that the design is exquisite, the elastic ring can deform when being impacted by the moving armature, impact is absorbed, and noise caused by direct contact and collision of the moving armature and the static armature is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnets, and in particular to a noise reduction electromagnet. Background Art

[0002] An electromagnet is a common electrical component. Existing electromagnets generally include a coil frame, a coil, a stationary armature and a moving armature. When the coil is energized, it generates an attractive force on the moving armature, thereby achieving the purpose of working.

[0003] For example, the authorization announcement number CN 104867648 A discloses an electromagnet structure, including a coil, a coil frame, a yoke, an upper cover, a static armature and a movable armature, the coil is wound around the outer periphery of the coil frame, the yoke is provided on the side wall and the bottom of the coil, the upper cover is provided on the top of the coil, a receiving space is formed in the center of the coil frame, the static armature is fixed to the top of the receiving space through the upper cover, the movable armature is provided at the bottom of the receiving space, a gap is provided between the static armature and the movable armature, and a first buffer pad and a second buffer pad are provided, the first buffer pad is provided at the top of the gap, and the second buffer pad is provided at the bottom of the receiving space. However, such a buffer pad often needs to have a certain thickness to achieve the effect of noise reduction, but the increase in thickness often brings another problem that the suction force of the electromagnet will be significantly weakened under the same power, which is not conducive to the stable operation of the electromagnet. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a noise-reducing electromagnet.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A noise reduction electromagnet comprises a shell, a receiving cavity is provided on the shell, a coil is housed in the receiving cavity, one end of the coil is limited by an end cover fixed on the shell; a static armature is fixed on the inner cavity of the shell, one side of the static armature is provided with the movable armature slidably arranged on the inner cavity, the movable armature is provided with a guide shaft, the guide shaft can pass through the static armature and at least partially extend to the outside thereof; an annular groove is provided on the end face of the movable armature close to the static armature, an elastic ring is housed in the annular groove, the elastic ring at least partially extends to the outside of the end face of the movable armature, and can abut against the end face of the static armature.

[0007] Preferably, the cross section of the annular groove is rectangular, and the cross section of the elastic ring is waist-shaped.

[0008] Preferably, a conical protrusion is provided on the end surface of the movable armature close to the stationary armature, and a groove matching the protrusion is provided on the stationary armature.

[0009] Preferably, the stationary armature has a built-in receiving groove, the built-in receiving groove has a built-in return spring, and the guide shaft passes through the return spring and is threadedly connected to the movable armature.

[0010] Preferably, an upper bearing is fixedly provided on the inner side of the end cover, and an inner ring of the upper bearing is sleeved on the movable armature.

[0011] Preferably, a slot is provided on the static armature, a lower bearing is built into the slot, and an inner ring of the lower bearing is sleeved on the guide shaft.

[0012] Preferably, a locking nut is fixedly provided on the guide shaft.

[0013] Preferably, a flat washer is sleeved on the guide shaft, the flat washer is located between the anti-loosening nut and the static armature, and an elastic washer is fixedly provided on the end side of the flat washer away from the anti-loosening nut.

[0014] Preferably, the elastic pad and the elastic ring are both made of rubber material.

[0015] The beneficial effects of the utility model are mainly reflected in:

[0016] 1. The design is exquisite. The setting of the elastic ring can deform when it is impacted by the moving armature, absorb the impact, and avoid the moving armature and the static armature directly colliding and generating noise. In addition, in this design, the gap between the static armature and the moving armature after being attracted is very small, so as to avoid the weakening of the electromagnet suction force and improve the stable operation of the electromagnet.

[0017] 2. The cross section of the elastic ring is waist-shaped, which increases its axial thickness, can absorb stronger impact and further extend the service life of the elastic ring;

[0018] 3. The setting of the elastic pad prevents the anti-loosening nut from directly colliding with the static armature, further reducing the noise caused by direct collision;

[0019] 4. The setting of the upper bearing can reduce the friction when the movable armature moves up and down, which can extend the service life and reduce the noise; BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 : A cross-sectional view of a preferred embodiment of the utility model;

[0022] Figure 2 : Figure 1 A partial enlarged view of part A. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] like Figure 1 to Figure 2 As shown, the utility model discloses a noise reduction type electromagnet, including a shell 1, a receiving cavity 11 is opened on the shell 1, a coil 2 is built in the receiving cavity 11, one end of the coil 2 is limited by an end cover 3 fixed on the shell 1, an upper bearing 31 is fixed on the inner side of the end cover 3, and the inner ring of the upper bearing 31 is sleeved on the movable armature 5. The setting of the upper bearing 31 can reduce the friction force when the movable armature 5 moves up and down, reduce the generation of noise, and at the same time, can also prolong the service life.

[0026] A stationary armature 4 is fixedly disposed on the inner cavity 12 of the housing 1, and a movable armature 5 is slidably disposed on the inner cavity 12 on one side of the stationary armature 4, and a guide shaft 6 is disposed on the movable armature 5, and the guide shaft 6 can penetrate the stationary armature 4 and at least partially extend to the outside thereof. In the above, the stationary armature 4 has a receiving groove 42 built therein, and a return spring 43 is built therein in the receiving groove 42, and the guide shaft 6 penetrates the return spring 43 and is screwed to the movable armature 5.

[0027] Furthermore, the static armature 4 is provided with a slot 44, the slot 44 is provided with the lower bearing 45, the inner ring of the lower bearing 45 is sleeved on the guide shaft 6, the arrangement of the lower bearing 45 can reduce the friction force when the guide shaft 6 moves up and down, reduce the noise, and at the same time, prolong the service life. In the above, the elastic pad 63 and the elastic ring 7 are both made of rubber material, and the rubber material is used to utilize its elastic buffering characteristics. Of course, other elastic buffering materials can also be used, all of which belong to the protection scope of the utility model, and no further elaboration is made here.

[0028] Another key point of the present invention is that: the end face of the movable armature 5 close to the stationary armature 4 is provided with an annular groove 51, and an elastic ring 7 is built in the annular groove 51, and the elastic ring 7 at least partially extends to the outside of the end face of the movable armature 5, and can abut against the end face of the stationary armature 4. In the above, the cross section of the annular groove 51 is rectangular, and the cross section of the elastic ring 7 is waist-shaped. The setting of the elastic ring can produce deformation when impacted by the movable armature 5, absorb the impact, and avoid direct collision between the movable armature 5 and the stationary armature 4 to generate noise. In addition, the cross section of the elastic ring 7 is waist-shaped, which can increase its axial thickness, absorb stronger impact, and further extend the service life of the elastic ring.

[0029] In the above, a conical protrusion 52 is provided on the end face of the movable armature 5 close to the stationary armature 4, and a groove 41 adapted to the protrusion 52 is provided on the stationary armature 4. The groove 41 and the protrusion 52 cooperate with each other to play a guiding and effective excitation role.

[0030] The guide shaft 6 is also sleeved with a flat washer 62, which is located between the locking nut 61 and the stationary armature 4, and an elastic washer 63 is fixed to the end of the flat washer 62 away from the locking nut 61. The setting of the elastic washer 63 prevents the locking nut 61 from directly colliding with the stationary armature, further reducing the noise generated by the direct collision.

[0031] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0032] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A noise reduction electromagnet, comprising a housing (1), characterized in that: The shell (1) is provided with a receiving cavity (11), the receiving cavity (11) having a coil (2) therein, one end of the coil (2) being limited by an end cover (3) fixedly mounted on the shell (1); a stationary armature (4) is fixedly mounted on the inner cavity (12) of the shell (1), one side of the stationary armature (4) is provided with a movable armature (5) slidably mounted on the inner cavity (12), the movable armature (5) is provided with a guide shaft (6), the guide shaft (6) can penetrate the stationary armature (4) and at least partially extend to the outside thereof; an annular groove (51) is provided on the end surface of the movable armature (5) close to the stationary armature (4), an elastic ring (7) is built in the annular groove (51), the elastic ring (7) at least partially extends to the outside of the end surface of the movable armature (5) and can abut against the end surface of the stationary armature (4).

2. The noise reduction electromagnet according to claim 1, characterized in that: The cross section of the annular groove (51) is rectangular, and the cross section of the elastic ring (7) is waist-shaped.

3. The noise reduction electromagnet according to claim 1, characterized in that: A conical protrusion (52) is provided on the end surface of the movable armature (5) close to the stationary armature (4), and a groove (41) matching the protrusion (52) is provided on the stationary armature (4).

4. The noise reduction electromagnet according to claim 1, characterized in that: The stationary armature (4) has a built-in receiving groove (42), the built-in receiving groove (42) has a built-in return spring (43), and the guide shaft (6) passes through the return spring (43) and is threadedly connected to the movable armature (5).

5. The noise reduction electromagnet according to claim 1, characterized in that: An upper bearing (31) is fixedly disposed on the inner side of the end cover (3), and an inner ring of the upper bearing (31) is sleeved on the movable armature (5).

6. The noise reduction electromagnet according to claim 1, characterized in that: The static armature (4) is provided with a slot (44), a lower bearing (45) is built into the slot (44), and an inner ring of the lower bearing (45) is sleeved on the guide shaft (6).

7. The noise reduction electromagnet according to any one of claims 1 to 6, characterized in that: A locking nut (61) is fixedly provided on the guide shaft (6).

8. The noise reduction electromagnet according to claim 7, characterized in that: A flat washer (62) is also sleeved on the guide shaft (6), the flat washer (62) is located between the anti-loosening nut (61) and the stationary armature (4), and an elastic washer (63) is fixedly provided on the end side of the flat washer (62) away from the anti-loosening nut (61).

9. The noise reduction electromagnet according to claim 8, characterized in that: The elastic pad (63) and the elastic ring (7) are both made of rubber material.

Images