阅读说明：本技术 伺服压力机单片大扭矩干式刹车器 (Single-piece high-torque dry brake of servo press ) 是由 纪明东 滨崎宗贞 于 2020-04-09 设计创作，主要内容包括：本发明公开了一种伺服压力机单片大扭矩干式刹车器,其包括依次套设于伺服马达的马达轴上的刹车固定座、压力板、刹车主件、气缸、活塞、端盖,刹车固定座与伺服马达的端面固接,刹车固定座的一轴端面设有至少一圈内凹弹簧座,内凹弹簧座内设有刹车弹簧,刹车弹簧与压力板抵接,压力板与刹车固定座连接,刹车主件具有摩擦片,摩擦片位于压力板与气缸之间,气缸与刹车固定座固接,气缸设有一圈轴向销孔,气缸开设有凹腔,端盖连接于凹腔的腔口上形成活塞腔,活塞活动设于活塞腔内,活塞的一轴端面上紧贴设有一圈顶销,顶销穿过销孔后与压力板抵接,端盖上开设有通气通道；优点是其刹车扭矩大、噪音小,且能有效提高伺服马达的运行效率。(The invention discloses a single-piece high-torque dry brake of a servo press, which comprises a brake fixing seat, a pressure plate and a brake main part which are sequentially sleeved on a motor shaft of a servo motor, the brake device comprises a cylinder, a piston and an end cover, wherein a brake fixing seat is fixedly connected with the end face of a servo motor, at least one circle of inwards concave spring seat is arranged on one axial end face of the brake fixing seat, a brake spring is arranged in the inwards concave spring seat and abutted against a pressure plate, the pressure plate is connected with the brake fixing seat, a brake main part is provided with a friction plate, the friction plate is positioned between the pressure plate and the cylinder, the cylinder is fixedly connected with the brake fixing seat, the cylinder is provided with a circle of axial pin holes, the cylinder is provided with a concave cavity, the end cover is connected to a cavity opening of the concave cavity to form a piston cavity, the piston is movably arranged in the piston cavity; the servo motor has the advantages of large braking torque, low noise and capability of effectively improving the operating efficiency of the servo motor.)

1. The utility model provides a big moment of torsion dry-type brake of servo press monolithic which characterized in that: including overlapping brake fixing base, pressure plate, brake main part, cylinder, piston, the end cover on the motor shaft of the servomotor of locating in the servo press in proper order, brake fixing base with the terminal surface fixed connection of servomotor, brake fixing base orientation pressure plate one terminal surface be provided with at least round evenly distributed's indent spring holder, every indent spring holder in be provided with a brake spring, brake spring with pressure plate orientation brake fixing base a terminal surface butt, the periphery wall of pressure plate with brake fixing base be connected, brake main part along with the rotation of servomotor's motor shaft and rotate, brake main part friction disc has, the friction disc be located pressure plate with the cylinder between, the cylinder with brake fixing base fixed connection, the cylinder is provided with a circle of axial pin holes which are uniformly distributed, a concave cavity is formed in one axial end face of the cylinder, which is back to the friction plate, the end cover is connected to a cavity opening of the concave cavity to form a piston cavity for the piston to move, the piston is movably arranged in the piston cavity, a circle of ejector pins are tightly attached to one axial end face of the piston, each ejector pin penetrates through one axial pin hole and then abuts against the pressure plate, and the end cover is provided with a ventilation channel communicated with the piston cavity; when air is fed, gaps are kept among the friction plate, the pressure plate and the cylinder; when exhausting, the friction plate is tightly attached to the pressure plate and the cylinder to generate friction.

2. The servo press single-piece high torque dry brake of claim 1, wherein: and the brake fixing seat is provided with two circles of the concave spring seats towards one axial end face of the pressure plate, and the two circles of the concave spring seats are staggered.

3. The servo press single-piece high torque dry brake according to claim 1 or 2, characterized in that: the brake main part consists of a connecting seat and the friction plate, the connecting seat is connected to a motor shaft of the servo motor through a tensioning sleeve, and the friction plate is connected to the peripheral wall of the connecting seat.

4. The servo press single-piece high torque dry brake of claim 3, wherein: the friction plate consists of an annular metal sheet and two friction annular sheets, annular notches are symmetrically formed in the outer side parts of the two axial end faces of the annular metal sheet along the radial direction, and each friction annular sheet is arranged in one annular notch; when exhausting, one of the friction ring sheets facing to the pressure plate is tightly attached to the pressure plate to generate friction, one of the friction ring sheets facing to the cylinder is tightly attached to the cylinder to generate friction, and the ring-shaped metal sheets are not in contact with the pressure plate and the cylinder.

5. The servo press single-piece high torque dry brake of claim 4, wherein: the outer circumferential wall of the connecting seat is symmetrically provided with two annular baffles along the axial direction, the inner side ends of the annular metal sheets along the radial direction are movably connected between the two annular baffles, and a gap retaining mechanism used for ensuring that the two friction annular sheets are completely separated when air enters is arranged between one annular baffle positioned on one side of the air cylinder and the annular metal sheets.

6. The servo press single-piece high torque dry brake of claim 5, wherein: the gap retaining mechanism consists of a circle of spring cavities which are uniformly distributed and arranged on one axial end surface of the annular metal sheet facing the cylinder and a tension dividing spring arranged in the spring cavities, and the tension dividing spring is abutted against one annular baffle plate facing the spring cavities; during air intake, the tension spring is stretched to maintain the gaps among the friction ring plate, the pressure plate and the cylinder.

Technical Field

The invention relates to a brake for a servo press, in particular to a single-piece high-torque dry brake for the servo press.

Background

In the servo press, the brake is used for braking a servo motor in a servo control system in an emergency when the servo control system is abnormal and needs emergency braking, so that safety accidents caused by the abnormity of the servo control system are avoided.

At present, the commonly used brakes in the servo press include a magnetic brake and a multi-piece dry brake. The magnetic brake is driven by electromagnetism, the electromagnet is electrified, and attracts the pressure plate, so that the brake pad is separated from the friction plate, and the brake is loosened; when the electromagnet is powered off, the pressure plate is pushed by spring force to be tightly attached to the friction plate, so that friction force is generated, and the brake state is entered. The multi-piece dry brake is driven by air pressure, the air cylinder enters air, the piston pushes the pressure plate to separate the brake lining from the friction plate, and the brake is released; the air cylinder exhausts air, the pressure plate is pushed by spring force to be tightly attached to the friction plate, friction force is generated, and the brake state is achieved. However, the magnetic brake has small braking capacity, generally the braking torque is about 30% of that of a servo motor, the slip angle is large in the emergency braking process, and the safety performance is poor; the multi-disc dry brake has high braking capacity, but during the operation of the servo motor, the friction plates can rub against each other, which not only can generate noise, but also can generate resistance, thereby reducing the working efficiency of the servo motor.

Disclosure of Invention

The invention aims to solve the technical problem of providing a single-piece high-torque dry brake of a servo press, which has high braking torque and low noise and can effectively improve the operating efficiency of a servo motor in the servo press.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a big moment of torsion dry-type brake of servo press monolithic which characterized in that: including overlapping brake fixing base, pressure plate, brake main part, cylinder, piston, the end cover on the motor shaft of the servomotor of locating in the servo press in proper order, brake fixing base with the terminal surface fixed connection of servomotor, brake fixing base orientation pressure plate one terminal surface be provided with at least round evenly distributed's indent spring holder, every indent spring holder in be provided with a brake spring, brake spring with pressure plate orientation brake fixing base a terminal surface butt, the periphery wall of pressure plate with brake fixing base be connected, brake main part along with the rotation of servomotor's motor shaft and rotate, brake main part friction disc has, the friction disc be located pressure plate with the cylinder between, the cylinder with brake fixing base fixed connection, the cylinder is provided with a circle of axial pin holes which are uniformly distributed, a concave cavity is formed in one axial end face of the cylinder, which is back to the friction plate, the end cover is connected to a cavity opening of the concave cavity to form a piston cavity for the piston to move, the piston is movably arranged in the piston cavity, a circle of ejector pins are tightly attached to one axial end face of the piston, each ejector pin penetrates through one axial pin hole and then abuts against the pressure plate, and the end cover is provided with a ventilation channel communicated with the piston cavity; when air is fed, gaps are kept among the friction plate, the pressure plate and the cylinder; when exhausting, the friction plate is tightly attached to the pressure plate and the cylinder to generate friction. When the servo press machine works normally, air enters from the ventilation channel, pushes the annular piston, pushes the annular pressure plate through the ejector pin, and enables the brake spring to be compressed, so that gaps are kept among the friction plate, the annular pressure plate and the annular cylinder, the friction plate is in a complete disengagement state at the moment, the brake is loosened, the servo motor runs at a high speed, and the annular brake main part rotates along with the rotation of a motor shaft of the servo motor; when the servo press is abnormal, air is exhausted from the ventilation channel, the brake spring extends to push the annular pressure plate, the annular piston is reset through the ejector pin, the friction plate, the annular pressure plate and the annular air cylinder are tightly attached together to generate friction under the action of the brake spring, and the brake enters a braking state to enable a motor shaft of the servo motor not to rotate any more.

And the brake fixing seat is provided with two circles of the concave spring seats towards one axial end face of the pressure plate, and the two circles of the concave spring seats are staggered. Set up two rings of brake spring and make the brake ability stronger, brake spring's quantity is as much as possible under the general condition, makes two adjacent brake spring can set up a maximum amount of brake spring under the minimum condition in clearance under the condition that does not influence each other, namely the position dislocation of two rings of indent spring seats, and an indent spring seat of inner circle is located between two adjacent indent spring seats of outer lane.

The brake main part consists of a connecting seat and the friction plate, the connecting seat is connected to a motor shaft of the servo motor through a tensioning sleeve, and the friction plate is connected to the peripheral wall of the connecting seat.

The friction plate consists of an annular metal sheet and two friction annular sheets, annular notches are symmetrically formed in the outer side parts of the two axial end faces of the annular metal sheet along the radial direction, and each friction annular sheet is arranged in one annular notch; when exhausting, one of the friction ring sheets facing to the pressure plate is tightly attached to the pressure plate to generate friction, one of the friction ring sheets facing to the cylinder is tightly attached to the cylinder to generate friction, and the ring-shaped metal sheets are not in contact with the pressure plate and the cylinder.

The outer circumferential wall of the connecting seat is symmetrically provided with two annular baffles along the axial direction, the inner side ends of the annular metal sheets along the radial direction are movably connected between the two annular baffles, and a gap retaining mechanism used for ensuring that the two friction annular sheets are completely separated when air enters is arranged between one annular baffle positioned on one side of the air cylinder and the annular metal sheets.

The gap retaining mechanism consists of a circle of spring cavities which are uniformly distributed and arranged on one axial end surface of the annular metal sheet facing the cylinder and a tension dividing spring arranged in the spring cavities, and the tension dividing spring is abutted against one annular baffle plate facing the spring cavities; during air intake, the tension spring is stretched to maintain the gaps among the friction ring plate, the pressure plate and the cylinder. When air is fed, the tension spring is extended to make the friction plate be completely separated, so that no friction is produced, and when the air is discharged, the tension spring is compressed, so that the friction produced by tightly sticking the friction plate, pressure plate and cylinder is not influenced.

Compared with the prior art, the invention has the advantages that:

1) when the servo press machine works normally, air enters from the ventilation channel, pushes the piston, the piston pushes the pressure plate through the ejector pin, so that the brake spring is compressed, further gaps are kept among the friction plate, the pressure plate and the cylinder, the friction plate is in a complete disengagement state at the moment, the brake is loosened, the servo motor runs at a high speed, and the brake main part rotates along with the rotation of a motor shaft of the servo motor; when the servo press machine is abnormal, air is exhausted from the ventilation channel, the brake spring extends to push the pressure plate, the piston is reset through the ejector pin, friction is generated by tightly attaching the friction plate to the pressure plate and the air cylinder under the action of the brake spring, the brake enters a braking state, a motor shaft of the servo motor does not rotate any more, and due to the fact that only one friction plate is adopted, the phenomenon that noise is generated due to mutual friction of multiple friction plates in the prior art is avoided, noise is greatly reduced, the phenomenon that resistance is generated due to mutual friction of multiple friction plates in the prior art is avoided simultaneously, and therefore the working efficiency of the servo motor is greatly improved.

2) The friction plate is used for the part of friction and friction annular piece selects the friction material that has great coefficient of friction to increase the diameter and the effective friction area of friction plate, more brake spring can be arranged to the friction plate of bigger diameter, has increased the brake torque, can make servo press stop more rapidly when taking place unusually like this, and the brake torque is greater than servo motor's moment of torsion, even servo motor's control system is out of control completely, this brake also can let servo motor stop rotating.

Drawings

FIG. 1 is a schematic cross-sectional structural view of a single-piece high-torque dry brake of a servo press according to the present invention mounted on a motor shaft of a servo motor;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The invention provides a single-piece high-torque dry brake of a servo press, which comprises an annular brake fixing seat 1, an annular pressure plate 2, an annular brake main part 3, an annular cylinder 4, an annular piston 5 and an annular end cover 6 which are sequentially sleeved on a motor shaft 91 of a servo motor 9 in the servo press, wherein the annular brake fixing seat 1 is fixedly connected with the end surface of the servo motor 9, two circles of uniformly distributed concave spring seats 11 are arranged on one axial end surface of the annular brake fixing seat 1 facing the annular pressure plate 2, the positions of the two circles of concave spring seats 11 are staggered, a brake spring 12 is arranged in each concave spring seat 11, the brake spring 12 is abutted against one axial end surface of the annular pressure plate 2 facing the annular brake fixing seat 1, the peripheral wall of the annular pressure plate 2 is connected with the annular brake fixing seat 1 through a spline 7, the annular brake main part 3 rotates along with the rotation of a motor shaft 91 of a servo motor 9, the annular brake main part 3 is provided with a friction plate 31, the friction plate 31 is positioned between an annular pressure plate 2 and an annular cylinder 4, the annular cylinder 4 is fixedly connected with an annular brake fixing seat 1, the annular cylinder 4 is provided with a circle of axial pin holes 41 which are uniformly distributed, one axial end surface of the annular cylinder 4, which is back to the friction plate 31, is provided with an annular concave cavity 42, an annular end cover 6 is connected to a cavity opening of the annular concave cavity 42 to form a piston cavity for the movement of an annular piston 5, the annular piston 5 is movably arranged in the piston cavity, one axial end surface of the annular piston 5 is closely provided with a circle of top pins 43, each top pin 43 passes through one axial pin hole 41 and then abuts against the annular pressure plate 2, and the annular end cover 6 is provided with a ventilation channel 61 communicated with the piston cavity; when air is fed, gaps are kept among the friction plate 31, the annular pressure plate 2 and the annular cylinder 4; during exhaust, friction is generated by the friction plate 31, the annular pressure plate 2 and the annular cylinder 4 which are tightly attached. When the servo press machine works normally, air enters from the ventilation channel 61, pushes the annular piston 5, the annular piston 5 pushes the annular pressure plate 2 through the ejector pin 43, the brake spring 12 is compressed, gaps are kept among the friction plate 31, the annular pressure plate 2 and the annular cylinder 4, the friction plate 31 is in a complete disengagement state at the moment, the brake is released, the servo motor 9 runs at a high speed, and the annular brake main part 3 rotates along with the rotation of the motor shaft 91 of the servo motor 9; when the servo press is abnormal, air is exhausted from the ventilation channel 61, the brake spring 12 extends to push the annular pressure plate 2, the annular piston 5 is reset through the ejector pin 43, the friction plate 31 is tightly attached between the annular pressure plate 2 and the annular air cylinder 4 under the action of the brake spring 12 to generate friction, and the brake enters a braking state, so that the motor shaft 91 of the servo motor 9 does not rotate any more. Set up two rings of brake spring 12 and make the brake ability stronger, the quantity of brake spring 12 is many as far as possible under the general condition, makes two adjacent brake spring 12 can set up a maximum amount of brake spring 12 under the condition that the clearance is minimum under the condition that does not influence each other, namely makes the position dislocation of two rings of indent spring seats 11, and an indent spring seat 11 of inner circle is located between two adjacent indent spring seats 11 of outer circle.

In this embodiment, the annular brake main part 3 is composed of an annular connecting seat 32 and a friction plate 31, the annular connecting seat 32 is connected to a motor shaft 91 of the servo motor 9 through a tension sleeve 33, the friction plate 31 is connected to the outer peripheral wall of the annular connecting seat 32 through a spline, the friction plate 31 is composed of an annular metal plate 34 and two friction annular plates 35 made of friction materials, annular notches 36 are symmetrically formed in the outer side parts of the two axial end surfaces of the annular metal plate 34 in the radial direction, and each friction annular plate 35 is installed in one annular notch 36; when exhausting, one friction ring piece 35 facing to the annular pressure plate 2 side is tightly attached to the annular pressure plate 2 to generate friction, one friction ring piece 35 facing to the annular cylinder 4 side is tightly attached to the annular cylinder 4 to generate friction, and the annular metal piece 34 is not contacted with the annular pressure plate 2 and the annular cylinder 4.

In this embodiment, two annular baffles 37 are axially symmetrically arranged on the outer peripheral wall of the annular connecting seat 32, the inner end of the annular metal sheet 34 in the radial direction is movably connected between the two annular baffles 37, a gap retaining mechanism 38 for ensuring that two friction annular sheets 35 are completely separated during air intake is arranged between one annular baffle 37 located on one side of the annular cylinder 4 and the annular metal sheet 34, the gap retaining mechanism 38 is composed of a circle of spring cavities 381 uniformly distributed on one axial end surface of the annular metal sheet 34 facing the annular cylinder 4 and a separate spring 382 arranged in the spring cavity 381, and the separate spring 382 abuts against one annular baffle 37 facing the spring cavity 381; during intake, the extension spring 382 extends to maintain a gap between the friction annular plate 35 and both the annular pressure plate 2 and the annular cylinder 4. During air intake, the tension spring 382 extends to completely disengage the friction plate 31 without any friction, and during air exhaust, the tension spring 382 is compressed without affecting the friction generated by the friction plate 31 and the close contact between the annular pressure plate 2 and the annular cylinder 4.

As described above, the brake spring 12 and the extension spring 382 are conventional springs.