Silencing type electromagnet

Abstract

The utility model discloses a noise reduction type electromagnet which comprises a shell with a hollow cavity, an upper flange and a lower flange, the upper flange and the lower flange are fixedly arranged at the two ends of the shell, a fixed iron core is fixedly arranged on the lower flange, a movable iron core is arranged on one side of the fixed iron core, an ejector rod is fixedly arranged on the movable iron core, a reset spring is arranged on the ejector rod in a sleeved mode, and the reset spring is arranged on the shell. The reset spring is located between the movable iron core and the fixed iron core, and a coil fixedly arranged on the inner wall of the shell is arranged on the outer side of the movable iron core. The fixed iron core is further provided with a circular truncated cone groove, the movable iron core is provided with a circular truncated cone block matched with the trapezoid groove, and the outer circumferential face of the circular truncated cone block can be completely attached to the inner wall of the circular truncated cone groove. The utility model has the main beneficial effects that the design is exquisite, the outer circumferential surface of the circular truncated cone block can be completely clung to the inner wall of the circular truncated cone groove, and the circular truncated cone block and the circular truncated cone groove are in surface-to-surface contact, so that the condition that the stress is excessively concentrated during collision can be avoided, the service life is prolonged, and the applicability is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnets, and more particularly to a noise-reducing electromagnet. Background Art

[0002] An electromagnet is a common electrical component. Existing electromagnets generally include a coil bobbin, a coil, a static armature, and a moving armature. When the coil is energized, it generates an attractive force on the moving armature to achieve the working purpose. In existing electromagnets, since the moving armature is freely placed in the central hole of the coil bobbin, a large impact force is generated at the moment when the moving armature is attracted, resulting in a large amount of noise.

[0003] For example, the authorized publication number CN110005732B discloses an electromagnetic brake, which includes a housing, an electromagnetic coil, a friction pair, a first pressing plate, a central shaft, a second pressing plate, a first spring, and a second spring. However, during the braking process of this brake, the moving armature and the static armature will collide violently, which easily causes damage to it, seriously affects its service life, and greatly increases the cost. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the existing technology and provide a noise-reducing electromagnet.

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

[0006] A noise-reducing electromagnet includes a housing with a hollow cavity, an upper flange and a lower flange fixed at both ends of the housing. A fixed iron core is fixed on the lower flange. A moving iron core is provided on one side of the fixed iron core. A push rod is fixed on the moving iron core. A return spring is sleeved on the push rod, and the return spring is located between the moving iron core and the fixed iron core. A coil is fixed on the inner wall of the housing outside the moving iron core. A frustum-shaped groove is also formed on the fixed iron core, and a frustum-shaped block adapted to the trapezoidal groove is provided on the moving iron core. The outer circumferential surface of the frustum-shaped block can be completely in close contact with the inner wall of the frustum-shaped groove.

[0007] Preferably, two clamping grooves are formed on the moving iron core, and a buffer pad is arranged in each clamping groove. One end of one of the buffer pads can be in contact with the fixed iron core, and one end of the other buffer pad can be in contact with the upper flange.

[0008] Preferably, a lower bearing sleeve is sleeved on the push rod, and the outer ring of the lower bearing sleeve is fixed on the fixed iron core.

[0009] Preferably, an upper bearing sleeve is sleeved on the moving iron core, and the outer ring of the upper bearing sleeve is fixed on the upper flange.

[0010] Preferably, a groove is formed on the frustum block, one end of the return spring is placed in the groove, and the other end abuts against the lower bearing sleeve.

[0011] Preferably, a coil box is further provided on the inner wall of the housing, the coil is wound on the coil box, upper and lower flanges are respectively provided on both sides of the coil, and the coil abuts against both of them.

[0012] Preferably, a convex portion is provided on the outer circumferential surface of the coil box, and the buffer pad can abut against the convex portion.

[0013] The beneficial effects of the present utility model are mainly reflected in:

[0014] 1. Exquisite design, the outer circumferential surface of the frustum block can be completely close to the inner wall of the frustum groove, and the contact between the two is surface-to-surface contact, which can avoid the stress concentration during collision, extend the service life, and has wide applicability.

[0015] 2. When the coil is energized, the moving iron core is affected by the magnetic field force and moves towards the fixed iron core against the elastic force of the return spring. When the coil is de-energized, the moving iron core is reset under the action of the return spring to ensure the position unity during the next operation.

[0016] 3. The setting of the lower bearing sleeve and the upper bearing sleeve can reduce the friction between the moving iron core and the ejector rod during the movement, reduce the generation of noise, and extend the service life.

[0017] 4. The setting of the buffer pad can further play a buffering role, avoid collision damage or the generation of noise, and extend the service life to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present utility model will be further described below with reference to the drawings:

[0019] Figure 1 : Cross-sectional view of the preferred embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be described in detail below with reference to the specific embodiments shown in the drawings. However, these embodiments are not limited to the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present utility model.

[0021] The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] As Figure 1As shown in the figure, the present utility model discloses a silencing electromagnet, which includes a housing 1 having a hollow cavity 11, and an upper flange 2 and a lower flange 3 fixed at both ends of the housing 1. The upper flange 2 and the lower flange 3 can be welded or screwed onto the housing, which both fall within the protection scope of the present utility model and will not be elaborated here.

[0023] A fixed iron core 31 is fixed on the lower flange 3. A moving iron core 4 is arranged on one side of the fixed iron core 31. A push rod 6 is fixed on the moving iron core 4. A return spring 7 is sleeved on the push rod 6. The return spring 7 is located between the moving iron core 4 and the fixed iron core 31. A coil 5 fixed on the inner wall of the housing 1 is arranged outside the moving iron core 4. When the coil 5 is energized, the moving iron core 4 is affected by the magnetic field force and moves towards the fixed iron core 31 against the elastic force of the return spring 7. When the coil is de-energized, the moving iron core 4 is reset under the action of the return spring 7 to ensure the position unity during the next operation.

[0024] A lower bearing sleeve 61 is sleeved on the push rod 6, and the outer ring of the lower bearing sleeve 61 is fixed on the fixed iron core 31. An upper bearing sleeve 44 is sleeved on the moving iron core 4, and the outer ring of the upper bearing sleeve 44 is fixed on the upper flange 2. The settings of the lower bearing sleeve 61 and the upper bearing sleeve 44 can reduce the friction between the moving iron core 4 and the push rod 6 during movement, reduce the generation of noise, and extend the service life.

[0025] A frustum groove 32 is also formed on the fixed iron core 31. A frustum block 41 adapted to the trapezoidal groove 32 is arranged on the moving iron core 4. The outer circumferential surface of the frustum block 41 can be completely in close contact with the inner wall of the frustum groove 32, and the contact between the two is surface-to-surface contact, which can avoid the situation of too concentrated stress during collision, extend the service life, and has a wide range of applicability.

[0026] Two clamping grooves 42 are formed on the moving iron core 4. A buffer pad 43 is arranged in each clamping groove 42. One end of one buffer pad 43 can abut against the fixed iron core 31, and one end of the other buffer pad 43 can abut against the upper flange 2. The setting of the buffer pad 43 can further play a buffering role, avoid the situation of collision damage or noise generation, and extend the service life to the greatest extent.

[0027] A groove 45 is formed on the frustum block 41. One end of the return spring 7 is placed in the groove 45, and the other end abuts against the lower bearing sleeve 61. The setting of the return spring 7 resets after the work is completed, which is convenient for the next operation and greatly improves the work efficiency.

[0028] On the inner wall of the housing 1, there is also a coil box 51 around which the coil 5 is wound. On both sides of the coil box 51, there are an upper flange 2 and a lower flange 3 respectively, and they are in contact with each other. On the outer circumferential surface of the coil box 51, there is a protrusion 52 with which the buffer pad 43 can be in contact to limit the position of the moving armature and avoid damage.

[0029] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0030] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Sound-absorbing electromagnet, comprising a housing (1) having a hollow cavity (11) and upper and lower flanges (2) and (3) fixedly provided at both ends of the housing (1), characterized in that: A fixed iron core (31) is fixedly arranged on the lower flange (3). A moving iron core (4) is arranged on one side of the fixed iron core (31). A push rod (6) is fixedly arranged on the moving iron core (4). A return spring (7) is sleeved on the push rod (6). The return spring (7) is located between the moving iron core (4) and the fixed iron core (31). A coil (5) fixedly arranged on the inner wall of the housing (1) is arranged outside the moving iron core (4). A frustum groove (32) is further formed in the fixed iron core (31). A frustum block (41) adapted to the frustum groove (32) is arranged on the moving iron core (4). The outer circumferential surface of the frustum block can be in complete contact with the inner wall of the frustum groove (32).

2. The muffling electromagnet according to claim 1, wherein: Two clamping grooves (42) are formed in the moving iron core (4). A buffer pad (43) is arranged in each clamping groove (42). One end of one buffer pad (43) can be in contact with the fixed iron core (31), and one end of the other buffer pad (43) can be in contact with the upper flange (2).

3. The sound - silencing electromagnet according to claim 1, characterized in that: A lower bearing sleeve (61) is sleeved on the push rod (6). The outer ring of the lower bearing sleeve (61) is fixedly arranged on the fixed iron core (31).

4. The sound-absorbing electromagnet according to claim 1, wherein: An upper bearing sleeve (44) is sleeved on the moving iron core (4). The outer ring of the upper bearing sleeve (44) is fixedly arranged on the upper flange (2).

5. The silencing electromagnet according to claim 3, characterized in that: A groove (45) is formed in the frustum block (41). One end of the return spring (7) is placed in the groove (45), and the other end is in contact with the lower bearing sleeve (61).

6. The sound-absorbing electromagnet according to claim 2, wherein: A coil box (51) is further arranged on the inner wall of the housing (1). The coil (5) is wound on the coil box (51). The upper flange (2) and the lower flange (3) are respectively arranged on both sides of the coil box (51) and are in contact with both of them.

7. The sound-damping electromagnet according to claim 6, wherein: A protruding portion (52) is arranged on the outer circumferential surface of the coil box (51). The buffer pad (43) can be in contact with the protruding portion (52).

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