CN216045131U - Electromagnetic brake plated with high-friction-coefficient film layer - Google Patents

Abstract

The utility model discloses an electromagnetic brake plated with a high-friction-coefficient film layer, which comprises a lower braking half part and an upper braking half part arranged on one side of the lower braking half part, wherein the lower braking half part comprises an inner magnetic pole and an outer magnetic pole which are arranged side by side inside and outside, a coil is arranged between the inner magnetic pole and the outer magnetic pole, the inner magnetic pole and the outer magnetic pole wrap the magnet inside, a gap is reserved between the inner magnetic pole and the upper braking half part and between the inner magnetic pole and the outer magnetic pole and the upper braking half part, and metal composite materials are arranged on opposite friction surfaces between the upper braking half part and between the inner magnetic pole and the outer magnetic pole to form a film coating layer for increasing the friction force between the lower braking half part and the upper braking half part. The coating layer made of the wear-resistant material is arranged on the friction surface, so that the wear resistance of the friction surface is improved, the gap does not need to be adjusted, and the service life of the electromagnetic brake is prolonged.

Description

Electromagnetic brake plated with high-friction-coefficient film layer

Technical Field

The utility model relates to the field of electromagnetic brakes, in particular to an electromagnetic brake plated with a high-friction-coefficient film layer.

Background

The electromagnetic brake is a new type electromagnetic brake with power-on separation and power-off braking, it is generally used in general Y series motor and other transmission system, can accurately position rotating and moving object and can prevent danger and brake, and said product can be extensively used in the places of petroleum, chemical industry, printing and packaging, etc. The common electromagnetic power-off brake mainly comprises a magnetic yoke, a coil, a spring, an armature, a brake disc, a gear sleeve and the like, and the working principle of the electromagnetic power-off brake is that when the coil is electrified with direct-current exciting current, a direct-current magnetic field generated by a magnetic yoke body overcomes the pressure of the spring to attract the armature, so that the armature moves towards the direction of the magnetic yoke, the moving distance is delta (about 0.5-1 mm), the surface of a friction plate and a friction pair on the brake disc also relieve the pressure at the moment, the brake disc moves on the gear sleeve and is in a floating state, and a shaft of an electric motor is in a rotating state; if the coil is powered off, the magnetic field of the coil disappears, the armature moves towards the direction of the brake disc under the action of the spring force, and the friction surface on the surface of the brake disc is pressed to generate friction torque, so that the effect of braking the rotating motor shaft is achieved.

At present, the gap between the friction surfaces of the conventional electromagnetic brake is increased along with the increase of the number of times of use due to the abrasion of the friction surfaces, for example, in patent CN201610025264.1, the gap control technology is also developed by controlling the size of the gap and further controlling the size of the friction force, but the gap control structure increases the cost of the electromagnetic brake, and the control of the gap cannot reduce the abrasion of the friction surfaces, which is a solution that is both temporary and permanent.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electromagnetic brake coated with a high-friction-coefficient film layer, wherein a coating layer made of wear-resistant materials is arranged on a friction surface, so that the wear resistance of the friction surface is improved, a gap does not need to be adjusted, and the service life of the electromagnetic brake is prolonged.

In order to achieve the purpose, the utility model provides the following technical scheme: the electromagnetic brake comprises a lower braking half part and an upper braking half part arranged on one side of the lower braking half part, wherein the lower braking half part comprises an inner magnetic pole and an outer magnetic pole which are arranged inside and outside in parallel, a coil is arranged between the inner magnetic pole and the outer magnetic pole, the inner magnetic pole and the outer magnetic pole cover the magnets inside, gaps are reserved between the inner magnetic pole and the upper braking half part and between the inner magnetic pole and the outer magnetic pole and between the upper braking half part and the upper braking half part, and the opposite friction surfaces between the upper braking half part and the inner magnetic pole and the outer magnetic pole are provided with metal composite materials to form coating layers for increasing friction force between the lower braking half part and the upper braking half part.

Preferably, the coating layer comprises a friction layer positioned on the surface and an adhesion layer used for fixing the friction layer.

Preferably, a buffer layer is arranged between the friction layer and the adhesion layer.

Preferably, the thickness of the coating is T1 or T2 or T3, wherein 100nm < T1<100um, 100um < T2 < 1mm, and T3>1 mm.

Preferably, the friction coefficient of the coating layer is S1 or S2, wherein 0.01 ≦ S1 ≦ S0.4, and 0.4< S2 ≦ S0.8.

Preferably, the upper braking half part comprises an armature and a plate spring arranged on the axial end face of the armature, rivet holes are uniformly formed in the armature, the plate spring is fixed on the armature through rivets penetrating through the rivet holes, and coating layers are arranged on the bottom face of the armature except the rivet holes.

Preferably, a plurality of holding frames are arranged between the inner magnetic pole and the outer magnetic pole and fixed by a plurality of screws, and the magnets are embedded in the holding frames in a limiting manner.

Preferably, the side of the coil facing the upper brake half is coated with an insulating glue.

Compared with the prior art, the utility model has the beneficial effects that:

the structure is simple, high friction coefficient and high hardness materials are sputtered on the friction surface to form a coating layer, so that the friction force of the coating layer can be increased, the coating layer has the advantages of high hardness, high oxidation temperature, strong adhesive force, corrosion resistance and the like, the friction force of the electromagnetic brake is greatly improved, and due to the wear-resistant characteristic of the coating layer, the gap size can be kept unchanged for a long time without adjusting the gap, so that the service life of the electromagnetic brake is prolonged.

Drawings

FIG. 1 is a cross-sectional perspective structural view of the present invention;

FIG. 2 is a half-section and partially enlarged view of the present invention;

FIG. 3 is a schematic view of the position of a coating layer according to the present invention;

FIG. 4 is a schematic cross-sectional view of a coating of the present invention;

FIG. 5 is a graph showing the change of the friction coefficient and the applied force before and after the plating according to the present invention.

Reference numerals:

1. the magnetic field generator comprises an outer magnetic pole, 2 an inner magnetic pole, 21 a gap, 3 a coil, 31 a coating layer, 4 a magnet, 41 an attachment layer, 42 a buffer layer, 43 a friction layer, 5 a retainer, 6 an armature, 7 a plate spring, 8 a screw, 9 and a rivet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 4, the present invention provides the following technical solutions to achieve the above objects: an electromagnetic brake plated with a high-friction-coefficient film layer comprises a lower braking half part and an upper braking half part arranged on one side of the lower braking half part, wherein the lower braking half part comprises an inner magnetic pole 2 and an outer magnetic pole 1 which are arranged side by side inside and outside, a coil 3 is arranged between the inner magnetic pole 2 and the outer magnetic pole 1, the inner magnetic pole 2 and the outer magnetic pole 1 wrap a magnet 4 inside, a gap is reserved between the inner magnetic pole 2 and the upper braking half part and between the outer magnetic pole 1 and the upper braking half part, and a coating layer 31 formed by metal composite materials is arranged on opposite friction surfaces between the upper braking half part and between the inner magnetic pole 2 and the outer magnetic pole 1 and used for increasing the friction force between the lower braking half part and the upper braking half part; after the power is switched on, the magnetic field intensity is limited to the lower braking half part, the suction force of the brake is weakened (approaches to zero), and the upper braking half part and the lower braking half part are separated at the moment.

As shown in fig. 5, when the brake is not energized, the upper and lower halves are engaged, and it can be seen that the curve of the friction coefficient (μ) and the acting force (F) of the plated layer before and after plating changes, the friction coefficient after plating becomes larger, and the friction force when the actuator is closed increases.

In this embodiment, as shown in fig. 4, the coating layer 31 is preferably a multi-layer structure, and includes a friction layer 43 located on the surface and an adhesion layer 41 for fixing the friction layer 43, the adhesion layer 41 is combined with the inner pole 2, the outer pole 1 and the upper half of the brake by sputtering methods such as CVD, PVD and the like, the friction layer 43 is made of metal or metal oxide or wear-resistant composite material and can be firmly combined with the adhesion layer 41, the friction layer 43 enables the whole coating layer 31 to have a relatively high friction coefficient, wherein the friction coefficient of the coating layer 31 is S1 or S2, where 0.01 ≦ S1 ≦ 0.4 and 0.4< S2 ≦ 0.8, the friction coefficients forming two selected regions can be selected, and a person skilled in the art can select different wear-resistant materials to make the friction layer 43 according to the friction coefficients.

Among these, as several options for the friction layer 43: (1) the titanium nitride silicon material is adopted, the appearance is golden, the film thickness is 4-5um, and the hardness is 2200 HV; (2) the carbonized material is adopted, the appearance is gray black, and the film thickness is 6 um; (3) the CTiAlN material is adopted, the appearance is grey white, the film thickness is 4-5um, and the friction coefficient is 0.8; (4) the GLC material is adopted, the appearance is black, the film thickness is 4-5um, and the hardness is 900 HV-1200V.

In this embodiment, as shown in fig. 4, a buffer layer 42 is disposed between the friction layer 43 and the adhesion layer 41, and the buffer layer 42 has a certain flexibility, so that the film plating layer 31 can be buffered when being impacted, the abrasion of the film plating layer 31 can be reduced, and the buffer layer 42 can be firmly combined with the friction layer 43 and the adhesion layer 41 at the same time.

The thickness of the coating layer 31 may be between nanometer and micrometer, and the thickness parameter is related to the gap, which may affect the magnitude of the friction force, in this embodiment, the thickness of the coating layer 31 is T1 or T2 or T3, where T1 is less than or equal to 100nm and less than or equal to 100um, T2 is less than or equal to 100um and less than or equal to 1mm, and T3 is greater than 1mm, so that the thickness of the coating layer 31 may be divided into three grades, and one skilled in the art may select T1 or T2 or T3 according to the gap 21.

In the embodiment, as shown in fig. 1 to 3, the upper brake half includes an armature 6 and a plate spring 7 disposed on an axial end face of the armature 6, rivet holes are uniformly disposed on the armature 6, the plate spring 7 is fixed on the armature 6 by rivets 9 penetrating through the rivet holes, coating layers 31 are disposed on the bottom surface of the armature 6 except the rivet holes, the rivet holes do not affect the disposition of the coating layers 31 and the friction force, and the rivets 9 facilitate the mounting and dismounting of the plate spring 7.

In this embodiment, as shown in fig. 1 to 3, a retainer 5 is installed between the inner magnetic pole 2 and the outer magnetic pole 1, the retainer 5 is fixed by a plurality of screws 8, the plurality of magnets 4 are embedded in the retainer 5 in a limiting manner, and the retainer 5, the inner magnetic pole 2 and the outer magnetic pole 1 are combined into a firm structure which is compact in structure, and can limit the magnets 4, so that the magnetic field generated by the magnets 4 is more stable, and the use of fasteners is reduced.

In this embodiment, the side of the coil 3 facing the upper brake half is coated with an insulating adhesive, the insulating adhesive does not contact with the armature 6, and the insulating adhesive has electrical insulation and heat dissipation functions, thereby improving the performance of the coil 3.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims (8)

1. The electromagnetic brake is characterized in that gaps are reserved between the inner magnetic pole (2) and the outer magnetic pole (1) and the upper braking half, and metal composite materials are arranged on the opposite friction surfaces between the upper braking half and the inner magnetic pole (2) and the upper braking half and between the upper braking half and the outer magnetic pole (1) to form coating layers (31) for increasing the friction force between the lower braking half and the upper braking half.

2. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: the coating layer (31) comprises a friction layer (43) positioned on the surface and an adhesion layer (41) used for fixing the friction layer (43).

3. The high coefficient of friction thin film layer electromagnetic brake of claim 2, wherein: a buffer layer (42) is arranged between the friction layer (43) and the adhesion layer (41).

4. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: the thickness of the coating layer (31) is T1 or T2 or T3, wherein the thickness of T1 is less than or equal to 100nm and less than or equal to 100um, the thickness of T2 is less than or equal to 100um and less than or equal to 1mm, and the thickness of T3 is greater than 1 mm.

5. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: the friction coefficient of the coating layer (31) is S1 or S2, wherein 0.01 is less than or equal to S1 is less than or equal to 0.4, and 0.4 is less than or equal to S2 is less than or equal to 0.8.

6. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: brake first half including armature (6) and setting leaf spring (7) on armature (6) axial terminal surface, armature (6) on evenly be provided with the rivet hole, leaf spring (7) fix on armature (6) through rivet (9) that pass the rivet hole, the bottom surface of armature (6) all be provided with coating film layer (31) except that the region of rivet hole.

7. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: the magnetic field generator is characterized in that a retainer (5) is arranged between the inner magnetic pole (2) and the outer magnetic pole (1), the retainer (5) is fixed through a plurality of screws (8), and a plurality of magnets (4) are embedded in the retainer (5) in a limiting manner.

8. The high coefficient of friction thin film layer electromagnetic brake of claim 1, wherein: one side of the coil (3) facing the upper half part of the brake is coated with insulating glue.

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