CN219893112U

CN219893112U - Servo brake

Info

Publication number: CN219893112U
Application number: CN202320139212.2U
Authority: CN
Inventors: 黄国硕
Original assignee: Changshu Sansong Precision Electromechanical Co ltd
Current assignee: Changshu Sansong Precision Electromechanical Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-10-24
Anticipated expiration: 2033-02-07

Abstract

The utility model discloses a servo brake, which comprises a coil body shell, wherein a coil is wound on the coil body shell; the armature plate is arranged at one end of the coil body shell opposite to the rotor of the motor, and moves towards the direction away from the coil body shell along the axial direction of the coil body shell under the action of electromagnetic force; the brake block is placed in a gap between the armature plate and the bottom plate along a direction parallel to the working surface of the armature plate; the portion of the base plate outside the area for connection with the armature plate is cut away; in the axial direction of the coil body shell, the armature plate and the brake pad are matched with the shape of the bottom plate; the weight of the servo brake is reduced by simplifying the coil body shell, the armature plate, the brake pad and the bottom plate.

Description

Servo brake

Technical Field

The utility model relates to the technical field of brakes, in particular to a servo brake.

Background

The servo motor is used for driving the mechanical equipment and controlling the motion state of the mechanical equipment. For example, the field of robotics. The servo motor drives the mechanical arm of the robot to move, and the mechanical arm carries or carries out preset machining on the articles in the moving process. After the mechanical arm moves to a preset target position, the servo motor is braked by the servo brake, and after the servo motor brakes, the mechanical arm stops moving. The appearance of the servo brake is generally full-circle size, and is made of metal materials, so that the whole weight of the servo brake is large. After the servo brake is mounted to the mechanical arm, the overall weight of the mechanical arm is made large.

Disclosure of Invention

The utility model aims to provide a servo brake, which can reduce the weight of the servo brake by simplifying the structure, thereby reducing the weight of a mechanical arm.

In order to achieve the purpose of the utility model, the following technical scheme is adopted:

a servo brake includes a coil body case around which a coil is wound; the motor also comprises an armature plate which is arranged at one end of the coil body shell opposite to the rotor of the motor and is parallel to the end face of the coil body shell, and the armature plate moves along the axial direction of the coil body shell towards the direction close to the coil body shell under the action of electromagnetic force generated after the coil is electrified, and the motor further comprises:

the bottom plate is arranged on one side of the armature plate, which is far away from the coil body shell, in parallel, and the armature plate and the bottom plate are connected together in a relatively sliding manner in a direction perpendicular to the working surface of the armature plate; and

a brake pad disposed in a gap between the armature plate and the base plate in a direction parallel to a working surface of the armature plate and fixedly coupled to a side of the base plate opposite to the armature plate;

at an edge portion of the base plate, a portion of the base plate other than a region for connecting with the armature plate is cut off; in the axial direction of the coil body shell, the armature plate and the brake pad are matched with the shape of the bottom plate; the weight of the servo brake is reduced by simplifying the coil body shell, the armature plate, the brake pad and the bottom plate.

In at least one embodiment, the device further comprises a rubber ring; an adjusting groove is formed in one end of the coil body shell, and the rubber ring is arranged in the adjusting groove; one side of the rubber ring extending to the outside of the coil body shell is abutted against the side face, opposite to the coil body shell, of the armature plate.

In at least one embodiment, the device further comprises a fixation sleeve; one end of the fixed sleeve is vertically arranged on the bottom plate; the armature plate is slidably sleeved at the other end of the fixed sleeve and slides along the fixed sleeve under the pushing action of electromagnetic force.

In at least one embodiment, the device further comprises a fixing dish type screw; the dish-shaped screw for fixing is penetrated in the bottom plate and is in threaded connection with the fixing sleeve.

In at least one embodiment, the number of the fixing sleeves is at least one, and the fixing sleeves are uniformly distributed in the circumferential direction of the bottom plate so as to realize stable connection of the bottom plate and the armature plate.

In at least one embodiment, the device further comprises a copper wire outlet pipe; the copper wire outlet pipe is arranged at the side part of the coil body shell; the coil wound in the coil body housing protrudes through the copper wire outlet tube.

In at least one embodiment, the device further comprises a tetragonal sleeve; the four-corner shaft sleeve and the bottom plate are concentrically arranged in a cavity at the center of the bottom plate; the brake pads are arranged on the outer peripheral side of the tetragonal shaft sleeve.

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

the end of the servo brake in the prior art is round. In the present utility model, at the edge portion of the base plate, the portion of the base plate for connection with the armature plate is left, the remaining portion is cut away, that is, only the portion necessary for mounting is left, and the remaining portion which does not achieve the special purpose is removed, so that the weight of the base plate is reduced.

The coil body shell, the armature plate, the brake pad and the bottom plate are aligned along the axial direction of the coil body shell and are sequentially arranged. The other parts, which are not shielded by the base plate and are not used for special purposes, are unnecessary parts, which are seen from one side of the base plate along the axial direction of the coil body housing, based on the shape and size of the base plate. Thereby cutting unnecessary parts of the coil body housing, the armature plate and the brake pad to obtain new coil body housing, armature plate and brake pad respectively. The coil body housing, the armature plate, and the brake pad each retain a necessary portion for achieving its function, and the weight of the coil body housing, the armature plate, and the brake pad is reduced by cutting unnecessary portions.

The weight of the servo brake is reduced by reducing the weight of the base plate, the coil body housing, the armature plate and the brake pad, thereby reducing the overall weight of the mechanical arm. Along with the reduction of the whole weight of the mechanical arm, the energy consumption in the mechanical arm movement engineering can be reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, and are included to illustrate and practice the utility model.

Fig. 1 is a longitudinal section view of the servo brake of the present utility model taken along a middle section.

Fig. 2 is a plan view of the servo brake of the present utility model as seen from the bottom plate side.

Fig. 3 is a longitudinal section along a middle section of a prior art servo brake.

Fig. 4 is a top view of a prior art servo brake as seen from the side of the base plate.

In the figure: 1. a coil body case; 2. a rubber ring; 3. an armature plate; 4. fixing the sleeve; 5. a bottom plate; 6. a dish-type screw for fixing; 7. a brake pad; 8. copper wire outlet groove; 9. and a four-corner shaft sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

The servo motor drives the mechanical arm to move, the servo motor is braked by the servo brake after the mechanical arm moves to a preset target position, and the mechanical arm stops moving after the servo motor brakes. The servo brake is made of metal materials, and the whole weight of the servo brake is large. After the servo brake is mounted to the mechanical arm, the overall weight of the mechanical arm is made large. When the weight of the mechanical arm is large, a large amount of energy is consumed to drive the mechanical arm to move. However, the existing servo brake is generally full-circle in shape, and the various components of the servo brake are matched in shape. The parts of each part have parts which do not play a role, and the parts which do not play a role can increase the weight of the servo brake, so that the weight of the whole structure of the mechanical arm is increased, the movement is inconvenient, and the energy consumption is increased.

In view of the above technical problems, the present utility model provides a servo brake, as shown in fig. 1 and 2, which includes a coil body housing 1, a coil wound around the coil body housing 1, and an armature plate 3, wherein the armature plate 3 is disposed parallel to an end surface of the coil body housing 1 at an end opposite to a rotor of a motor of the coil body housing 1.

The base plate 5 is arranged parallel to the armature plate 3 on the side facing away from the coil housing 1, and the armature plate 3 and the base plate 5 are connected in a sliding manner relative to one another in a direction perpendicular to the working surface of the armature plate 3. A braking gap is formed between the base plate 5 and the armature plate 3. The brake pads 7 are placed in the gap between the armature plate and the base plate, i.e. in the brake gap, in a direction parallel to the working surface of the armature plate 3.

The coil generates electromagnetic force after being energized, and the armature plate 3 is moved in a direction approaching the coil body case 1 along an axial direction of the coil body case 1 by electromagnetic force driving. The armature plate 3 releases the brake pads 7 during sliding movement and away from the base plate 5. The base plate 5 is connected to the rotor of the motor. After the base plate 5 is released, the motor rotates.

After the power is off, the electromagnetic force of the coil disappears, the armature plate 3 moves along the axial direction of the coil body shell 1 towards the direction close to the brake pad 7 under the pushing of the rubber ring 2, the brake pad 7 is pressed onto the bottom plate 5, and the bottom plate 5 is locked, so that the braking of the motor is realized.

The base plate 5 of the prior art servo brake is circular as shown in fig. 3 and 4. Only a partial region of the base plate 5 is used for bearing the pressing of the brake pads 7, namely, the brake pads 7 only apply friction force to the partial region of the base plate 5, and a part of the region of the base plate 5 close to the edge does not play a role in friction braking. The edge portion of the bottom plate 5, which is of an opposite complete circular structure, increases the weight and increases the moving load.

In another embodiment, at the edge portion of the base plate 5, the base plate 5 and the armature plate 3 are axially aligned, which can slide relatively in the axial direction, and the base plate 5 and the edge portion of the armature plate 3 are connected. The portion of the base plate 5 other than the area for connection with the armature plate 3 does not play a practical role, and is cut away to reduce the weight of the base plate 5.

In another embodiment, the coil body housing 1, the armature plate 3, and the brake pad 7 are matched in shape with the bottom plate 5 in the axial direction of the coil body housing 1.

As shown in fig. 2, the coil housing 1, the armature plate 3, and the cut-out portions of the bottom plate 5 are cut out from the top view from one side of the bottom plate 5, and the coil housing 1, the armature plate 3 are simplified in structure and reduced in weight.

The brake pad 7 is used for realizing braking, and the armature plate 3 pushes the brake pad 7 to be extruded onto the bottom plate 5 so as to realize extrusion braking on the bottom plate 5. As shown in fig. 2, a part of the bottom plate 5 near the edge is cut away, which cannot actually function, and a corresponding part of the brake pad 7 is also cut away, so that weight is reduced, and friction braking of the bottom plate 5 can be realized only by keeping a part matched with the bottom plate 5. The radial maximum of the brake pad 7 can be kept circular, and the rest part can be cut off to form a notch.

In general, the coil body housing 1, the armature plate 3, the brake pad 7 and the bottom plate 5 are simplified in structure, and portions which cannot be actually used are removed, so that the weight of the servo brake is reduced.

In another embodiment, as shown in fig. 1, the servo brake further comprises a rubber ring 2. An adjusting groove is formed in one end of the coil body shell 1, the adjusting groove can be in a circular ring shape concentric with the coil body shell 1, and the rubber ring 2 is arranged in the adjusting groove. The side of the rubber ring 2 that extends outside the coil housing 1 abuts against the side of the armature plate 3 opposite the coil housing 1. The armature plate 3 moves along the axial direction of the coil body housing 1 under the action of electromagnetic force, and when the armature plate 3 approaches the coil body housing 1 and contacts with the end part of the coil body housing 1, the armature plate 3 is supported by the rubber ring 2, namely, the rubber ring 2 plays a supporting and protecting role on the armature plate 3, so that impact damage is avoided.

In another embodiment, the adjusting groove may be provided as a plurality of circular arc segments, each of which is located on the same circumference concentric with the coil body housing 1.

In another embodiment, as shown in fig. 1, the servo brake further comprises a stationary sleeve 4.

The fixing dish-shaped screw 6 is vertically penetrated in the bottom plate 5, and the fixing dish-shaped screw 6 is penetrated in the fixing sleeve 4 and is in threaded connection. The fixing dish screw 6 locks the fixing sleeve 4 to the opposite side of the base plate 5 from the armature plate 3 in a direction perpendicular to the side of the base plate 5. The armature plate 3 is slidably sleeved at one end of the fixed sleeve 4, which is away from the bottom plate 5. The armature plate 3 slides along the fixed sleeve 4 under the action of electromagnetic force. The axial direction of the fixed sleeve 4 and the coil body housing 1 are parallel.

The fixed sleeve 4 guides the armature plate 3 so that the armature plate 3 can accurately move along the direction defined by the fixed sleeve 4, the armature plate 3 can accurately and stably approach the bottom plate 5, and the moving stability of the armature plate 3 is improved.

In another embodiment, as shown in fig. 2, the number of the fixing sleeves 4 is at least 3, and the number of the fixing sleeves 4 in this embodiment is 3. 3 fixed sleeve 4 is in evenly distributed in the circumferencial direction of bottom plate 5, 3 fixed sleeve 4 will respectively from different positions bottom plate 5 with armature board 3 links together, and each fixed sleeve 4 evenly distributed is in on the bottom plate 5 for fixed sleeve 4 evenly distributed is in the atress is even on the bottom plate 5, improves the stability of installation.

In another embodiment, as shown in fig. 1, the servo brake further comprises a copper wire outlet tube 8. In this embodiment, the copper wire outlet pipe 8 is in a circular pipe shape, and the copper wire outlet pipe 8 is mounted on the side of the coil body case 1. The copper wire outlet pipe 8 leads out the coil wound in the coil body shell 1, limits the position of the led-out wire and prevents the lead-out wire from being scattered and affecting normal use.

In another embodiment, as shown in fig. 2, the servo brake further comprises a quadrangular shaft sleeve 9. The quadrangle shaft sleeve 9 and the bottom plate 5 are concentrically arranged in a cavity at the center of the bottom plate 5. The brake pads 7 are arranged on the outer peripheral side of the quadrangular shaft sleeve 9.

Principle of power-off of servo motor brake (brake): the structure is that a coil spring presses a brake pad, and braking torsion is generated by friction force. When the exciting current is cut off, the spring pressure of the coil spring can enable the armature to press the brake plate, and the brake can be actuated; when the exciting coil is electrified, the armature pressing the brake disc compresses the coil spring and is attracted by the exciting iron core, and the brake is in a released state.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims

1. A servo brake includes a coil body case around which a coil is wound; the armature plate is arranged at one end of the coil body shell opposite to the rotor of the motor in parallel relative to the end face of the coil body shell, and moves along the axial direction of the coil body shell towards the direction approaching the coil body shell under the action of electromagnetic force generated after the coil is electrified; the device also comprises a quadrangle shaft sleeve; the four-corner shaft sleeve and the bottom plate are concentrically arranged in the cavity at the center of the bottom plate, and the novel structure is characterized by further comprising:

a brake pad disposed in a gap between the armature plate and the bottom plate in a direction parallel to a working surface of the armature plate, the brake pad being disposed on an outer peripheral side of the quadrangular shaft sleeve;

at an edge portion of the base plate, a portion of the base plate other than a region for connecting with the armature plate is cut off; in the axial direction of the coil body shell, the armature plate and the brake pad are matched with the shape of the bottom plate; the weight of the servo brake is reduced by simplifying the coil body housing, the armature plate, the brake pad and the base plate.

2. The servo brake as recited in claim 1, further comprising a rubber ring; an adjusting groove is formed in one end of the coil body shell, and the rubber ring is arranged in the adjusting groove; one side of the rubber ring extending to the outside of the coil body shell is abutted against the side face, opposite to the coil body shell, of the armature plate.

3. The servo brake as recited in claim 1, further comprising a stationary sleeve; one end of the fixed sleeve is vertically arranged on the bottom plate; the armature plate is slidably sleeved at the other end of the fixed sleeve and slides along the fixed sleeve under the pushing action of electromagnetic force.

4. The servo brake as recited in claim 3, further comprising a set screw; the dish-shaped screw for fixing is penetrated in the bottom plate and is in threaded connection with the fixing sleeve.

5. A servo brake as claimed in claim 3 wherein said number of said retaining sleeves is at least 3 and is evenly distributed about the circumference of said base plate to provide a stable connection between said base plate and said armature plate.

6. The servo brake as recited in any one of claims 1 to 5, further comprising a copper wire outlet tube; the copper wire outlet pipe is arranged at the side part of the coil body shell; the coil wound in the coil body housing protrudes through the copper wire outlet tube.