阅读说明：本技术 一种超薄电磁制动器 (Ultrathin electromagnetic brake ) 是由 王荣春 赵梁 于 2021-11-15 设计创作，主要内容包括：本发明公开了一种超薄电磁制动器,包括定子、电磁线圈、衔铁、摩擦片、盖板和压簧,定子与衔铁相互靠近,电磁线圈安装于定子内并靠近衔铁,压簧置于定子上的压簧孔内且与衔铁接触,定子上远离衔铁的一侧表面设有内凹的定子沉槽,摩擦片和盖板均置于定子沉槽内且摩擦片位于盖板与定子沉槽的槽底之间,衔铁与盖板之间通过连接件固定连接且该连接件穿过定子上的对应通孔并能自由移动。本发明有效利用了定子上除了安装电磁线圈和压簧以外的剩余空间,有效降低了整个电磁制动器的厚度,其厚度可小于10mm,最小可达9mm,显著地降低了电磁制动器的厚度,使其满足更高要求产品如协助机器人关节模组的超薄化需求。(The invention discloses an ultrathin electromagnetic brake which comprises a stator, an electromagnetic coil, an armature, a friction plate, a cover plate and a pressure spring, wherein the stator and the armature are close to each other, the electromagnetic coil is arranged in the stator and close to the armature, the pressure spring is arranged in a pressure spring hole in the stator and is in contact with the armature, an inwards concave stator sinking groove is formed in the surface of one side, far away from the armature, of the stator, the friction plate and the cover plate are both arranged in the stator sinking groove, the friction plate is positioned between the cover plate and the bottom of the stator sinking groove, the armature and the cover plate are fixedly connected through a connecting piece, and the connecting piece penetrates through a corresponding through hole in the stator and can move freely. The invention effectively utilizes the residual space on the stator except for the installation of the electromagnetic coil and the pressure spring, effectively reduces the thickness of the whole electromagnetic brake, the thickness of the electromagnetic brake can be less than 10mm and can reach 9mm at least, and the thickness of the electromagnetic brake is obviously reduced, so that the ultrathin electromagnetic brake can meet the requirements of products with higher requirements such as an auxiliary robot joint module.)

1. The utility model provides an ultra-thin electromagnetic braking ware, includes stator, solenoid, armature, friction disc, apron and pressure spring, the stator with armature is close to each other, solenoid install in the stator and be close to armature, be close to on the stator one side of armature is equipped with the pressure spring hole, the pressure spring is arranged in the pressure spring is downthehole and its both ends respectively with the pressure spring hole the hole bottom with armature contact its characterized in that: keep away from on the stator one side surface of armature is equipped with the sunken groove of stator of indent, the friction disc with the apron is all arranged in the sunken inslot of stator just the friction disc is located the apron with between the tank bottom of the sunken groove of stator, armature with pass through connecting piece fixed connection and this connecting piece between the apron correspond the through-hole on the stator and can freely move.

2. The ultra-thin electromagnetic brake of claim 1, wherein: the method comprises the steps of setting a part, corresponding to a friction plate, in a stator sinking groove to be a first stator sinking groove, setting a part, corresponding to a cover plate, in the stator sinking groove to be a second stator sinking groove, wherein the groove bottom of the second stator sinking groove is communicated with the first stator sinking groove, the diameter of the first stator sinking groove is smaller than that of the second stator sinking groove, the height of the first stator sinking groove is smaller than that of the friction plate, the height of the second stator sinking groove is larger than that of the cover plate, and a connecting piece is located on the outer side of the circumference of the friction plate.

3. The ultra-thin electromagnetic brake of claim 1 or 2, characterized in that: the connecting piece is a screw, a counter bore is formed in the armature, a cover plate screw hole is formed in the cover plate, a screw rod of the screw penetrates through the counter bore to be connected with the cover plate screw hole, and a nut of the screw is arranged in the counter bore.

4. The ultra-thin electromagnetic brake of claim 3, wherein: the part of the screw, which is positioned between the armature and the cover plate, is sleeved with a bushing, and the outer diameter of the bushing is smaller than the aperture of the corresponding through hole on the stator.

5. The ultra-thin electromagnetic brake of claim 3, wherein: thread glue is filled between the screw and the counter bore, between the screw and the cover plate screw hole and between the screw and the bushing.

6. The ultra-thin electromagnetic brake of claim 3, wherein: the number of the screws is three, and the screws are evenly distributed on the same virtual circumference on the stator.

Technical Field

The invention relates to a thin electromagnetic brake, in particular to an ultrathin electromagnetic brake suitable for a robot joint module.

Background

The electromagnetic brake is a connector for transmitting the torque force of the driving side to the driven side, can be freely combined, cut off or braked according to requirements, has the advantages of compact structure, simplicity in operation, sensitivity in response, long service life, reliability in use, easiness in realization of remote control and the like, is an ideal automatic execution element in the modern industry, and mainly plays roles in transmitting power, controlling movement and the like in a mechanical transmission system.

In some specific applications, the electromagnetic brake is required to have a smaller thickness for convenient application, for example, as the robot industry is continuously developing, the demand for the electromagnetic brake is more and more severe, and the electromagnetic brake is expected to be thinner and better.

As shown in fig. 1, a conventional thin electromagnetic brake includes a stator 1, an armature 2, a friction plate 3, and a cover plate 4, and its basic principle is: a motor shaft (not shown) is connected with a square wheel (not shown), the square wheel is matched with an inner hole of a friction plate 3, when an electromagnetic coil (not shown) in a stator 1 is powered off, the elastic force of a spring (not shown, arranged between the stator 1 and an armature 2) acts on the armature 2, the motor shaft drives the rotating friction plate 3 to be tightly clamped between the armature 2 and a cover plate 4 through the square wheel, so that braking torque is generated, and at the moment, a gap is generated between the armature 2 and the stator 1. When the brake needs to be released, the electromagnetic coil in the stator 1 is connected with a direct current power supply, the generated magnetic field attracts the armature 2 to move towards the direction close to the stator 1, the armature 2 compresses the spring when moving, and the friction plate 3 is released at the moment to release the brake.

The conventional thin electromagnetic brake described above has disadvantages in that: the stator 1, the armature 2, the friction plate 3 and the cover plate 4 are sequentially arranged, and each part occupies a certain thickness space, so that the thickness of the whole electromagnetic brake is larger, the thinnest part at present is 14.5mm, and the thickness can meet the general thinning requirement, but is difficult to meet the ultrathin requirement of products with higher requirements such as an auxiliary robot joint module.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a slim electromagnetic brake having a further reduced overall thickness to meet the demand for slim down.

The invention realizes the purpose through the following technical scheme:

the utility model provides an ultra-thin electromagnetic brake, includes stator, solenoid, armature, friction disc, apron and pressure spring, the stator with armature is close to each other, solenoid install in the stator and close to armature, be close to on the stator one side of armature is equipped with the pressure spring hole, the pressure spring is arranged in the pressure spring is downthehole and its both ends respectively with the hole bottom in pressure spring hole with the armature contact, keep away from on the stator a side surface of armature is equipped with the stator heavy groove of indent, the friction disc with the apron is all arranged in the stator heavy inslot just the friction disc is located the apron with between the tank bottom of stator heavy groove, armature with pass through connecting piece fixed connection and this connecting piece between the apron corresponding through-hole on the stator and can freely move.

Preferably, in order to ensure that the friction plate and the cover plate are reliably limited and simultaneously reduce the occupied space of the friction plate and the cover plate so as to ensure that the stator has enough installation space for installing a pressure spring and an electromagnetic coil, the part of the stator sinking groove corresponding to the friction plate is set as a first stator sinking groove, the part of the stator sinking groove corresponding to the cover plate is set as a second stator sinking groove, the groove bottom of the second stator sinking groove is communicated with the first stator sinking groove, the diameter of the first stator sinking groove is smaller than that of the second stator sinking groove, the height of the first stator sinking groove is smaller than that of the friction plate, the height of the second stator sinking groove is larger than that of the cover plate, and the connecting piece is positioned outside the circumference of the friction plate.

Preferably, in order to facilitate reliable connection of the cover plate and the armature, the connecting piece is a screw, a countersunk hole is formed in the armature, a cover plate screw hole is formed in the cover plate, a screw rod of the screw penetrates through the countersunk hole to be connected with the cover plate screw hole, and a nut of the screw is arranged in the countersunk hole.

Preferably, in order to connect the cover plate and the armature more stably, a bushing is sleeved on a part of the screw, which is located between the armature and the cover plate, and the outer diameter of the bushing is smaller than the aperture of the corresponding through hole on the stator.

Preferably, in order to more stably connect the cover plate and the armature, thread glue is filled between the screw and the countersunk hole, between the screw and the cover plate screw hole, and between the screw and the bushing.

Preferably, for more stable connection of the cover plate and the armature, the number of the screws is three and is uniformly distributed on the same virtual circumference on the stator.

The invention has the beneficial effects that:

according to the invention, the stator sinking groove is designed on the stator, the friction plate and the cover plate are arranged in the stator sinking groove, the residual space except for the installation of the electromagnetic coil and the pressure spring on the stator is effectively utilized, the thickness of the whole electromagnetic brake is effectively reduced, the thickness can be smaller than 10mm and can be as small as 9mm at least, the thickness of the electromagnetic brake is obviously reduced, the thickness of the electromagnetic brake can meet the requirement of products with higher requirements on ultra-thinness such as a joint module of a assisting robot, the armature and the cover plate are connected together to realize a transmission function, and the suction force and the thrust force of the electromagnetic coil and the pressure spring to the armature are transmitted to the cover plate, so that the normal functions of braking and braking of the friction plate are realized.

Drawings

Fig. 1 is a schematic sectional view of a conventional thin electromagnetic brake;

FIG. 2 is a front view of the ultra-thin electromagnetic brake of the present invention;

fig. 3 is a sectional view a-a in fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 2 and 3, the ultrathin electromagnetic brake of the present invention includes a stator 9, an electromagnetic coil 8, an armature 6, a friction plate 13, a cover plate 12, and a pressure spring (not visible in the figures), where the stator 9 and the armature 6 are close to each other, the electromagnetic coil 8 is installed in the stator 9 and close to the armature 6, one side of the stator 9 close to the armature 6 is provided with a pressure spring hole (not visible in the figures), the pressure spring is placed in the pressure spring hole, and two ends of the pressure spring are respectively contacted with a hole bottom of the pressure spring hole and the armature 6, one side surface of the stator 9 far from the armature 6 is provided with a concave stator sink groove, the friction plate 13 and the cover plate 12 are both placed in the stator sink groove, the friction plate 13 is located between the cover plate 12 and a groove bottom of the stator sink groove, the armature 6 and the cover plate 12 are fixedly connected by a connection piece, and the connection piece passes through a corresponding through hole on the stator 9 and can move freely. Also shown in fig. 2 is the power supply line 5 for the electromagnetic coil 8.

As shown in fig. 2 and fig. 3, the present invention also discloses a plurality of more optimized specific structures, and the structures can be combined with one or more structures to form a more optimized technical solution according to actual needs.

In order to ensure that the friction plate 13 and the cover plate 12 are reliably limited, and simultaneously reduce the occupied space of the friction plate 13 and the cover plate 12 to ensure that the stator 9 has enough installation space for installing a pressure spring and an electromagnetic coil 8, the part of the stator sink groove corresponding to the friction plate 13 is set as a first stator sink groove 10, the part of the stator sink groove corresponding to the cover plate 12 is set as a second stator sink groove 11, the groove bottom of the second stator sink groove 11 is communicated with the first stator sink groove 10, the diameter of the first stator sink groove 10 is smaller than that of the second stator sink groove 11, the height of the first stator sink groove 10 is smaller than that of the friction plate 13, the height of the second stator sink groove 11 is larger than that of the cover plate 12, and the connecting piece is positioned outside the circumference of the friction plate 13.

In order to conveniently and reliably connect the cover plate 12 and the armature 6, the connecting piece is a screw 7, the armature 6 is provided with a countersunk hole (not marked in the figure), the cover plate 12 is provided with a cover plate screw hole (not marked in the figure), a screw rod of the screw 7 penetrates through the countersunk hole to be connected with the cover plate screw hole, and a nut of the screw 7 is arranged in the countersunk hole.

In order to connect the cover plate 12 and the armature 6 more stably, the portion of the screw 7 located between the armature 6 and the cover plate 12 is sleeved with a bushing 14, and the outer diameter of the bushing 14 is smaller than the diameter of a corresponding through hole (not marked in the figure) of the stator 9.

In order to connect the cover plate 12 and the armature 6 more stably, thread glue is filled between the screw 7 and the countersunk hole, between the screw 7 and the cover plate screw hole, and between the screw 7 and the bushing 14.

For a more stable connection of the cover plate 12 and the armature 6, the screws 7 are three and evenly distributed on the same imaginary circumference on the stator 9.

As shown in fig. 2 and 3, when in use, a motor shaft (not shown, same as a conventional structure) is connected with a square wheel (not shown, same as a conventional structure), the square wheel is matched with an inner hole of a friction plate 13, when an electromagnetic coil 8 in a stator 9 is powered off, the elastic force of a compression spring acts on an armature 6, the armature 6 and a cover plate 12 are mutually connected, the armature 6 and the cover plate 12 are simultaneously pushed to the left in fig. 3 by the elastic force of the compression spring, the cover plate 12 tightly presses the friction plate 13 on the bottom of a first stator sunken groove 10, so that braking torque is generated, and at the moment, a gap is generated between the armature 6 and the stator 9. When the brake needs to be released, the electromagnetic coil 8 in the stator 9 is connected with a direct current power supply, the generated magnetic field attracts the armature 6 to move towards the direction close to the stator 9, the pressure spring is compressed when the armature 6 moves, the armature 6 drives the cover plate 12 to move synchronously, and the cover plate 12 releases the pressure on the friction plate 13, so that the brake is released.

Description of the drawings: the stator, the armature, the friction plate and the cover plate correspond to those in the background art, but the structure of the stator is obviously changed, and the structures of the armature, the friction plate and the cover plate need to be adaptively changed, so that different reference numerals are adopted.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.