阅读说明：本技术 叠加制动的常闭式制动器 (Normally closed brake with superimposed braking ) 是由 杨国平 于 2020-05-27 设计创作，主要内容包括：叠加制动的常闭式制动器。电动推动装置(2)包括推杆装置(4)、电机(5)和单向控制机构(9),电动推动装置传动系统中的转轴有电机轴(5a)、推杆装置(4)中的螺纹转轴(4a)和单向控制机构(9)中的连接轴(9a),连接轴(9a)与电机轴、螺纹转轴内端有多种匹配连接方式；推杆装置内有第一制动弹簧构件(7)和第二制动弹簧构件(16)构成双级制动力源构件,所述电动推杆装置端部有与制动机构(1)中制动臂驱动端(3c)铰轴连接的连接耳(8a)。第一制动弹簧构件实现一级制动,第二制动弹簧构件实现叠加制动,可克服现有技术制动间隙增大时影响制动效果的不足,提高制动效果的可靠性和稳定性,减少维护工作量。(Normally closed brake with superimposed braking. The electric pushing device (2) comprises a push rod device (4), a motor (5) and a one-way control mechanism (9), a rotating shaft in a transmission system of the electric pushing device is provided with a motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4) and a connecting shaft (9a) in the one-way control mechanism (9), and the connecting shaft (9a) is connected with the motor shaft and the inner end of the threaded rotating shaft in a multiple matching mode; a first brake spring component (7) and a second brake spring component (16) are arranged in the push rod device to form a two-stage brake force source component, and the end part of the electric push rod device is provided with a connecting lug (8a) which is hinged with a brake arm driving end (3c) in the brake mechanism (1). The first brake spring component realizes primary braking, the second brake spring component realizes superposition braking, the defect that the braking effect is influenced when the braking gap is increased in the prior art can be overcome, the reliability and the stability of the braking effect are improved, and the maintenance workload is reduced.)

1. The normally closed brake with superimposed braking comprises a braking mechanism (1) and an electric pushing device (2);

the brake mechanism (1) comprises symmetrically arranged brake arms (3), the two brake arms (3) are respectively hinged with two fixed members on the base to form a fulcrum Z of the brake arms, the brake arms (3) can swing around the fulcrum Z, one ends of the brake arms (3) are brake ends (3a) and the other ends of the brake arms are drive ends (3c), the brake ends (3a) of the two brake arms (3) are provided with brake members (3b) with symmetrical structures, and brake friction plates (3d) are arranged on the inner sides of brake blocks on the brake members (3 b);

the method is characterized in that:

the electric pushing device (2) comprises a push rod device (4), a motor (5) and a one-way control mechanism (9) for controlling the brake operation condition;

the one-way control mechanism (9) comprises a second shell (17) and a connecting shaft (9a) positioned in the shell, and a normally closed one-way brake mechanism (10) and a normally open one-way brake mechanism (11) are arranged on the connecting shaft (9 a);

the rotating shafts in the transmission system of the electric pushing device (2) comprise a motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4) and a connecting shaft (9a) in the one-way control mechanism (9), the motor shaft (5a) can drive the connecting shaft (9a) and the threaded rotating shaft (4a) to rotate in the forward direction, and when the threaded rotating shaft (4a) rotates in the reverse direction, the connecting shaft (9a) and the motor shaft (5a) rotate in the reverse direction;

the push rod device (4) is provided with a connecting plate (12) and a first shell (13), the inner end of the first shell (13) is connected with the connecting plate (12), one end of a threaded rotating shaft (4a) is connected with the connecting plate (12), a threaded section (4b) at the other end of the threaded rotating shaft (4a) is located in the first shell (13), a nut (14) is arranged on the threaded section (4b), the threaded section (4b) and the nut (14) form a threaded transmission pair, the thread angle is larger than a self-locking angle, a flange plate (14a) is arranged on the nut (14), when the threaded rotating shaft (4a) rotates, the nut (14) can axially displace along the threaded section (4b), and the flange plate (14a) on the nut (14) displaces along with the displacement;

the outer end of the first shell (13) is provided with a sleeve type push rod (8) with an end wall (8b), the inner end of the sleeve type push rod (8) is provided with a disc piece (15), the disc piece (15) is connected and fixed with the inner end of the sleeve type push rod (8), the wall surface of the sleeve type push rod (8) is matched with a hole in the end wall (13a) of the first shell (13), the outer end of the sleeve type push rod (8) extends out of the end wall (13a) of the first shell (13), a flange plate (14a) on the nut (14) is positioned in the cavity of the sleeve type push rod (8), the diameter of an inner hole (15a) in the disc piece (15) is larger than the outer diameter of the nut (14), and the sleeve type push rod (8) can axially extend out or retract relative to the first shell (13) under the action;

a first brake spring component (7) is arranged in the first shell (13), the first brake spring component (7) is positioned between a disc piece (15) at the inner end of the sleeve type push rod (8) and a connecting plate (12), or between the disc piece (15) at the inner end of the sleeve type push rod (8) and an end wall (13a) of the first shell (13), and the tension of the first brake spring component (7) acts on the sleeve type push rod (8);

a second brake spring member (16) is arranged in the push rod device (4), the second brake spring member (16) is positioned between a flange (14a) on the nut (14) and an end wall (8b) of the sleeve type push rod (8), or between the flange (14a) on the nut (14) and a disc piece (15) at the inner end of the sleeve type push rod (8), and the tension of the second brake spring member (16) acts on the sleeve type push rod (8);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the outer end of a component at the other end of the sleeve type push rod (8) which is coaxial are respectively provided with a connecting lug (8a) which is positioned on the same axis, and the connecting lug (8a) is hinged with a driving end (3c) of a brake arm (3) in the brake mechanism.

2. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between the motor shaft (5a) and the threaded rotating shaft (4a), the front end of the motor shaft (5a) is connected with one end of the connecting shaft (9a), and the other end of the connecting shaft (9a) is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with the front end of the shell of the motor (5), and the other end of the second shell is connected with the connecting plate (12);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the rear end of a shell of the motor (5) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

3. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of an integral structure and is positioned at the rear end of the motor shaft (5a), the rear end of the motor shaft (5a) is connected with the inner end of the connecting shaft (9a), and the front end of the motor shaft (5a) is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, and the inner end of the second shell (17) is connected with the rear end of the shell of the motor (5);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer end wall of the second shell (17) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

4. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of a segmented structure of a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between the motor shaft (5a) and the threaded rotating shaft (4a), and the second segmented body (9a02) is located at the rear end of the motor shaft (5 a); the first subsection body (9a01) positioned between the motor shaft (5a) and the threaded rotating shaft (4a) is connected with the front end of the motor shaft (5a) at one end and the inner end of the threaded rotating shaft (4a) at the other end, and the second subsection body (9a02) positioned at the rear end of the motor shaft (5a) is connected with the rear end of the motor shaft (5a) at the inner end; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

any one of the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) can be arranged on the subsection body (9a01), the other one of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism is arranged on the subsection body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the first subsection body (9a01) and the second subsection body (9a02) can be mutually shifted;

the second shell (17) is of a first sub-shell (1701) and second sub-shell (1702) sub-shell structure, corresponds to a first section (9a01) and a second section (9a02) of the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the front end of the shell of the motor (5), the other end of the first sub-shell is connected with the connecting plate (12), and the inner end of the second sub-shell (1702) is connected with the rear end of the shell of the motor (5);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer end wall of the second sub-shell (1702) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

5. The normally closed superimposed brake actuator according to claim 1, wherein:

a speed reducing mechanism (6) is arranged in the electric pushing device (2), and the speed reducing mechanism (6) is provided with an input shaft (6a) and an output shaft (6 b);

the rotating shafts in the transmission system of the electric pushing device (2) comprise the motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4), a connecting shaft (9a) in the one-way control mechanism (9), an input shaft (6a) and an output shaft (6b) of the speed reducing mechanism (6); the motor shaft (5a) can drive the connecting shaft (9a), the input shaft (6a) and the output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a) to rotate, and when the threaded rotating shaft (4a) rotates reversely, the output shaft (6b) and the input shaft (6a) of the speed reducing mechanism, the connecting shaft (9a) and the motor shaft (5a) rotate reversely.

6. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between a motor shaft (5a) and an input shaft (6a) of the speed reducing mechanism, the front end of the motor shaft (5a) is connected with one end of the connecting shaft (9a), the other end of the connecting shaft (9a) is connected with the input shaft (6a) of the speed reducing mechanism, and an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with the front end of the shell of the motor (5), and the other end of the second shell is connected with one side wall of the speed reducing mechanism (6);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the rear end of a shell of a motor (5) at the other end coaxial with the sleeve type push rod (8) are respectively provided with a connecting lug (8a) which is positioned on the same axis.

7. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between an output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a), the front end of the motor shaft (5a) is connected with an input shaft (6a) of the speed reducing mechanism, the output shaft (6b) of the speed reducing mechanism is connected with one end of the connecting shaft (9a), and the other end of the connecting shaft (9a) is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with one side wall of the speed reducing mechanism (6), and the other end of the second shell is connected with the connecting plate (12);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the rear end of a shell of a motor (5) at the other end coaxial with the sleeve type push rod (8) are respectively provided with a connecting lug (8a) which is positioned on the same axis.

8. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned at the rear end of the motor shaft (5a), the inner end of the connecting shaft (9a) is connected with the rear end of the motor shaft (5a), the front end of the motor shaft (5a) is connected with an input shaft (6a) of the speed reducing mechanism, and an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, and the inner end of the second shell (17) is connected with the rear end of the shell of the motor (5);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer end wall of the second shell (17) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

9. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of a segmented structure comprising a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between an output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a), the second segmented body (9a02) is located on the outer end of an input shaft (6a) of the speed reducing mechanism, one end of the first segmented body (9a01) is connected with the output shaft (6b) of the speed reducing mechanism, the other end of the first segmented body is connected with the inner end of the threaded rotating shaft (4a), and the inner end of the second segmented body (9a02) is connected with the outer end of the input shaft (6a) of the speed reducing mechanism; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

the normally closed type one-way brake mechanism (10) is connected to the first sectional body (9a01), the normally open type one-way brake mechanism (11) is connected to the second sectional body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the sectional body (9a01) and the sectional body (9a02) can be mutually replaced;

the second shell (17) is a sub-shell structure of a first sub-shell (1701) and a second sub-shell (1702), a first section body (9a01) and a second section body (9a02) corresponding to the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the inner side wall of the speed reducing mechanism (6), the other end of the first sub-shell is connected with the connecting plate (12), and the inner end of the second sub-shell (1702) is connected with the outer side wall of the speed reducing mechanism (6);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer side wall of the speed reducing mechanism (6) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

10. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of a segmented structure comprising a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between the motor shaft (5a) and the inner end of an input shaft (6a) of the speed reducing mechanism, the second segmented body (9a02) is located on the outer end of the input shaft (6a) of the speed reducing mechanism, one end of the first segmented body (9a01) is connected with the inner end of the input shaft (6a) of the speed reducing mechanism, the other end of the first segmented body is connected with the front end of the motor shaft (5a), the inner end of the second segmented body (9a02) is connected with the outer end of the input shaft (6a) of the speed reducing mechanism, and the inner end of an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

the normally closed type one-way brake mechanism (10) is connected to the first sectional body (9a01), the normally open type one-way brake mechanism (11) is connected to the second sectional body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the sectional body (9a01) and the sectional body (9a02) can be mutually shifted;

the second shell (17) is a sub-shell structure of a first sub-shell (1701) and a second sub-shell (1702), a first section body (9a01) and a second section body (9a02) corresponding to the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the inner side wall of the speed reducing mechanism (6), the other end of the first sub-shell is connected with the front end of the shell of the motor (5), and the inner end of the second sub-shell (1702) is connected with the outer side wall of the speed reducing mechanism (6);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer side wall of the speed reducing mechanism (6) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

11. A normally closed superimposed brake actuator according to any one of claims 1 to 10, wherein: in the push rod device (4), a first key groove matching structure (18) formed by a sliding key and a sliding groove is arranged on the outer wall surface of the nut (14) and an inner hole (15a) of the disc piece (15), and a second key groove matching structure (19) formed by a groove and a key is arranged on the outer edge of the disc piece (15) at the inner end of the sleeve type push rod (8) and the inner wall surface of the first shell (13).

The technical field is as follows:

the invention relates to a normally closed brake, in particular to a normally closed brake with superposition braking.

Background art:

the normally closed brake mainly comprises a brake mechanism and a driving device. Fig. 1 is a schematic structural diagram of a conventional normally closed brake, which includes a braking mechanism 1 'and an electric pushing device 2'; the brake mechanism 1 'comprises symmetrically arranged brake arms 3', the two brake arms 3 'are respectively connected with two fixed component hinge shafts on the machine base to form a fulcrum Z' of the brake arms, the brake arms 3 'can swing around the fulcrum Z', one end of each brake arm 3 'is a brake end 3 a', the other end of each brake arm is a drive end 3c ', the brake ends 3 a' of the two brake arms 3 'are provided with brake components 3 b' with symmetrical structures, and the inner sides of brake blocks on the brake components 3b 'are provided with brake friction plates 3 d'; the electric pushing device 2 'comprises a pushing rod device 4', a motor 5 'and a speed reducing mechanism 6'; the rotating shaft in the transmission system of the electric pushing device 2 ' comprises a motor shaft 5a ', an input shaft 6a ' and an output shaft 6b ' of a speed reducing mechanism 6 ', and a threaded rotating shaft 4a ' of the pushing rod device 4 '; when the motor 5 ' is electrified, the motor shaft 5a ' drives the input shaft, the output shaft and the threaded rotating shaft of the speed reducing mechanism 6 ' to rotate in the positive direction; the outer end of the input shaft 6a 'of the speed reducing mechanism is provided with a normally open clutch 2 a' which is used for locking the input shaft of the speed reducing mechanism in a non-rotatable state when the brake mechanism is in an open state and is powered on and closed so as to maintain the brake mechanism in the open state;

the push rod device 4 'comprises a shell 4 e', the inner end of the shell 4e 'is connected with the inner side wall of the box body of the speed reducing mechanism 6', the thread section 4b 'of the thread rotating shaft 4 a' is located in an inner cavity of the shell 4e ', the thread section 4 b' is provided with a nut 4c ', the nut 4 c' and the thread section 4b 'are thread transmission pairs, the middle part of the nut 4 c' is provided with a flange plate 4d ', the outer end of the flange plate 4 d' is a push rod 8 ', the outer section of the push rod 8' extends out of the end wall of the shell 4e ', a brake spring part 7' is arranged between the flange plate 4d 'and the inner side wall of a box body of the speed reducing mechanism 6', the tension of the brake spring part 7 'acts on the push rod 8' through the flange plate 4d ', the end part of the push rod 8' and the outer side wall of the box body of the speed reducing mechanism 6 'are provided with connecting lugs 8 a' located on the same axis.

The working process of the normally closed brake is as follows: when the motor is electrified and operated, the output shaft of the speed reducing mechanism drives the threaded rotating shaft 4a ' to rotate, the nut 4c ' displaces inwards along the threaded section 4b ', the brake spring part 7 ' is compressed, meanwhile, the nut 4c ' and the push rod 8 ' retract inwards, the connecting lugs 8a ' at two ends of the push rod device drive the driving ends 3c ' of the two brake arms 3 ' to swing inwards, the brake members 3b ' at the brake ends 3a ' of the two brake arms 3 ' are opened outwards until the brake state shown in figure 1 is released, the clutch 2a ' is electrified and closed, the input shaft of the speed reducing mechanism is locked in a non-rotatable state, the brake mechanism is maintained in an open state, and the motor is powered off and stops rotating; when braking is needed, the clutch 2a ' is powered off, the state of reset and opening is realized, the locking of the input shaft of the speed reducing mechanism is released, the motor shaft in the rotating shaft system, the input shaft and the output shaft of the speed reducing mechanism 6 ' and the threaded rotating shaft of the push rod device 4 ' are all in a rotatable state, in this state, under the tension action of the brake spring member 7 ', the threaded rotating shaft 4a ', the gear shaft and the motor shaft of the speed reducing mechanism are reversed, the nut 4c ' is displaced towards the outer end along the threaded section 4b ', the push rod 8 ' extends outwards along with the threaded section, the push rod device 4 ' respectively pushes the driving ends 3c ' of the two braking arms 3 ' to swing outwards through the connecting lugs 8a ' at the two ends, and the braking members 3b ' of the braking ends 3a ' of the two braking arms 3 ' are folded inwards until the braking state shown in fig.

The normally closed brake has the following defects:

1) in the braking process, the friction plate and the braking surface of the braked member are frequently engaged and braked to be worn, so that the gap between the friction plate and the braking surface of the braked member is increased or overlarge, the stretching stroke of the brake spring part 7 'is increased, the stretching force of the brake spring part 7' is reduced, the braking effect is influenced, the braking reliability and the working stability are reduced, especially when the brake spring part with high rigidity is used, the braking acting force is rapidly reduced due to slight abrasion of the friction plate, the braking effect is seriously influenced, and even potential safety hazards are brought. In order to solve the problem that the friction plate is worn to cause the gap between the friction plate and the braking surface of the braked member to be enlarged or overlarge, the common method is to adjust the gap in time or replace the new friction plate, and frequently adjust the gap, so that the maintenance workload of the brake is large.

2) In the process of realizing braking, due to the tension action of the brake spring part 7 ', namely the push nut 4 c' is pushed to rapidly displace towards the outer end along the threaded section 4b ', the push rod device 4' pushes the driving ends 3c 'of the two brake arms 3' to rapidly swing towards the outer side through the connecting lugs 8a 'at the two ends of the push rod device, the brake members 3 b' at the braking ends of the two brake arms 3 'are rapidly folded towards the inner side, the friction plates 3 d' on the brake block are rapidly engaged with the braked member, and the kinetic energy formed by the rotation of the rotating member causes impact on the braked member, so that the brake and equipment vibrate, the stability of the braking process is influenced, and even the members are damaged.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a normally closed brake with superimposed braking, which realizes superimposed braking by arranging a double-stage braking power source component, can improve the reliability of braking effect and the stability of operation process, and can effectively reduce the maintenance workload of the brake.

The technical scheme of the invention is as follows:

for ease of reading and understanding, the present invention will be described with the aid of the accompanying drawings.

The scheme of the invention comprises a braking mechanism 1 and an electric pushing device 2; see fig. 2, 5-7, 13;

the brake mechanism 1 comprises symmetrically arranged brake arms 3, the two brake arms 3 are respectively connected with two fixed member hinge shafts on the base to form a fulcrum Z of the brake arms, the brake arms 3 can swing around the fulcrum Z, one end of each brake arm 3 is a brake end 3a, the other end of each brake arm 3 is a drive end 3c, the brake ends 3a of the two brake arms 3 are provided with brake members 3b with symmetrical structures, and brake friction plates 3d are arranged on the inner sides of brake blocks on the brake members 3 b;

the electric pushing device 2 comprises a push rod device 4, a motor 5 and a one-way control mechanism 9 for controlling the brake operation condition;

the one-way control mechanism 9 comprises a second shell 17 and a connecting shaft 9a positioned in the shell, and a normally closed one-way brake mechanism 10 and a normally open one-way brake mechanism 11 are arranged on the connecting shaft 9 a; the one-way brake mechanism is a brake mechanism with a brake function only in one motion direction, and the normally open one-way brake mechanism 11 has the following functions: when the power is switched on, the locking connecting shaft 9a, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate reversely, so that the brake is effectively maintained to be in an opening state; the normally closed one-way brake mechanism 10 functions as: when the power is off, the locking connecting shaft 9a, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate in the positive direction, so that the brake is effectively maintained in a braking state;

the rotating shaft in the transmission system of the electric pushing device 2 comprises a motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4 and a connecting shaft 9a in the one-way control mechanism 9; when the motor 5 operates, the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction (the specification refers to that the motor shaft 5a drives the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction), and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the connecting shaft 9a and the motor shaft 5a rotate in the reverse direction;

the push rod device 4 is provided with a connecting plate 12 and a first shell 13, the inner end of the first shell 13 is connected with the connecting plate 12, one end of a threaded rotating shaft 4a is connected with the connecting plate 12 and is supported by the connecting plate 12, a threaded section 4b at the other end of the threaded rotating shaft 4a is positioned in the first shell 13, a nut 14 is arranged on the threaded section 4b, the threaded section 4b and the nut 14 form a threaded transmission pair, the threaded angle is larger than a self-locking angle, a flange 14a is arranged on the nut 14, when the threaded rotating shaft 4a rotates, the nut 14 can axially displace along the threaded section 4b, and the flange 14a on the nut 14 concomitantly displaces;

an extension type push rod 8 with an end wall 8b is arranged at the outer end of the first shell 13, a disc part 15 is arranged at the inner end of the extension type push rod 8, the disc part 15 is connected and fixed with the inner end of the extension type push rod 8, the disc part 15 is provided with an inner hole 15a, the wall surface of the extension type push rod 8 is matched with a hole in the wall 13a of the end part of the first shell 13, the outer end of the extension type push rod 8 extends out of the wall 13a of the end part of the first shell 13, a flange 14a on the nut 14 is positioned in the cavity of the extension type push rod 8, the diameter of the inner hole 15a on the disc part 15 is larger than the outer diameter of the nut 14, and under the action of external force;

a first brake spring member 7 is arranged in the first housing 13, the first brake spring member 7 is positioned between a disk 15 at the inner end of the sleeve type push rod 8 and a connecting plate 12, see fig. 2, 5 to 12, or the first brake spring member 7 is positioned between the disk 15 at the inner end of the sleeve type push rod 8 and an end wall 13a of the first housing 13, see fig. 13, and the tension of the first brake spring member 7 acts on the sleeve type push rod 8;

a second brake spring member 16 is arranged in the push rod device 4, the second brake spring member 16 is positioned between a flange 14a on the nut 14 and an end wall 8b of the sleeve type push rod 8, see fig. 2, 5 to 12, or the second brake spring member 16 is positioned between the flange 14a on the nut 14 and a disc part 15 at the inner end of the sleeve type push rod 8, see fig. 13, and the tension of the second brake spring member 16 acts on the sleeve type push rod 8; the first brake spring component 7 and the second brake spring component 16 constitute a force source component of the two-stage brake of the invention;

in the electric push rod device 2, the outer end of the sleeve type push rod 8 and the outer end of the other end member coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis, see fig. 2, 5 to 13; the connecting lug 8a is hinged with the driving end 3c of the brake arm 3 in the brake mechanism.

Further, the method comprises the following steps:

the connecting shaft 9a in the unidirectional control mechanism 9 may be an integral structure, see fig. 2, 5, and 6, or a split structure of a first segment 9a01 and a second segment 9a02, see fig. 7; the integral structure connecting shaft 9a or the first subsection 9a01 and the second subsection 9a02 are connected with the inner ends of the motor shaft 5a and the threaded rotating shaft 4a in a plurality of matching and mutually connecting modes;

when the connecting shaft 9a is of an integral structure, the connecting shaft 9a of the integral structure can be positioned between the motor shaft 5a and the threaded rotating shaft 4a or on the rear end of the motor shaft 5a, and when the connecting shaft 9a of the integral structure is positioned between the motor shaft 5a and the threaded rotating shaft 4a, referring to fig. 2 and 5, the front end of the motor shaft 5a is connected with one end of the connecting shaft 9a, and the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4 a; when the connecting shaft 9a of the integral structure is positioned at the rear end of the motor shaft 5a, referring to fig. 6, the rear end of the motor shaft 5a is connected with the inner end of the connecting shaft 9a, and the front end of the motor shaft 5a is connected with the inner end of the threaded rotating shaft 4 a; the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, and the positions of the normally closed type unidirectional braking mechanism and the normally open type unidirectional braking mechanism on the connecting shaft 9a can be interchanged.

When the connecting shaft 9a is a segmented structure of the first segmented body 9a01 and the second segmented body 9a02, the first segmented body 9a01 is located between the motor shaft 5a and the threaded rotating shaft 4a, and the second segmented body 9a02 is located at the rear end of the motor shaft 5a, see fig. 7; the first segment 9a01 located between the motor shaft 5a and the threaded rotating shaft 4a, one end of which is connected with the front end of the motor shaft 5a, the other end of which is connected with the inner end of the threaded rotating shaft 4a, the second segment 9a02 located at the rear end of the motor shaft 5a, the inner end of which is connected with the rear end of the motor shaft 5a, the positions of the first segment 9a01 and the second segment 9a02 can be interchanged; any one of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 can be arranged on the first sectional body 9a01, and the other one is arranged on the second sectional body 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 which are respectively connected to the sectional body 9a01 and the sectional body 9a02 can be mutually shifted;

the second housing 17 in the unidirectional control mechanism 9 may be of a unitary structure corresponding to the unitary structure connecting shaft 9a, or may be of a split-housing structure of the first split housing 1701 and the second split housing 1702 corresponding to the first split body 9a01 and the second split body 9a02 of the connecting shaft 9 a.

The working process of the structural embodiment shown in FIG. 2 is as follows:

the first detent spring member 7 in figure 2 is located between a disc 15 at the inner end of telescopic push rod 8 and the connecting plate 12, and the second detent spring member 16 is located between a flange 14a on nut 14 and an end wall 8b of telescopic push rod 8.

1) And (3) releasing the brake:

in the braking state shown in fig. 2, in order to achieve the extended state of the first braking spring member 7 after the first-stage braking, the second braking spring member 16 is in the superimposed braking state of being further compressed and storing energy, the normally closed one-way braking mechanism 10 in this state is in the closed state and the locking connecting shaft 9a cannot rotate forward, so as to maintain the second braking spring member 16 in the stable and reliable superimposed braking state, the sleeve type push rod 8 is in the state of being extended outward, and a distance is maintained between the inner side surface of the flange 14a on the nut 14 and the inner side surface of the disk 15 at the inner end of the sleeve type push rod 8, and between the outer end of the threaded section 4b and the inner side surface of the end wall 8b of the sleeve type push rod 8, as shown in fig. 2.

When the braking needs to be released, the normally closed type one-way brake mechanism 10 is powered on, the forward locking state of the connecting shaft 9a is released, the normally open type one-way brake mechanism 11 is powered on and closed at the same time (the normally open type one-way brake mechanism 11 is powered on and closed and only has the one-way brake function of controlling the connecting shaft 9a not to be reversed, and the forward rotation of the connecting shaft 9a is not influenced), so that the connecting shaft 9a is in the state of being capable of rotating forward, in this state, the compressed second brake spring member 16 releases energy and the acting force of stretching in the state of the forward rotation of the threaded rotating shaft 4a, the flange 14a on the nut 14 drives the nut 14 to displace towards the inner end along the threaded section 4b, so that the threaded rotating shaft 4a generates the forward rotation, the motor 5 is powered on, the motor shaft 5a drives the connecting shaft 9a and the threaded rotating shaft 4a to rotate forward, namely, the second brake spring member 16 releases the energy and the acting force of, the two resultant forces enable the threaded rotating shaft 4a to rapidly rotate in the forward direction, so that the displacement of the nut 14 towards the inner end along the threaded section 4b is accelerated until the inner side surface of a flange plate 14a on the nut 14 is attached to and pressed against the inner side surface of a disk part 15 at the inner end of the sleeve type push rod 8, the extension stroke of the second brake spring component 16 is completed, the extension trend of the second brake spring component 16 acting on the sleeve type push rod 8 is eliminated, and the superposition braking is released; in the process of releasing the superposition braking, the second brake spring component 16 releases energy and is assisted by the stretching action of the motor shaft 5a to drive the threaded rotating shaft 4a to rotate in the positive direction, so that the braking releasing time is shortened, the motor is assisted by the starting of the motor, and the energy consumption of the motor can be reduced; with the motor shaft 5a continuing to drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, the nut 14 continuing to displace towards the inner end along the threaded section 4b, the flange 14a on the nut 14 driving the sleeve type push rod 8 to retract inwards, the connecting lugs 8a at the two ends of the electric pushing device 2 pulling the driving ends 3c of the two braking arms to swing inwards, the end points of the braking ends 3a of the two braking arms moving outwards along with the flange until the friction plate 3d and the braked member are separated to a certain gap, the first braking spring member 7 is compressed along with the flange, the primary braking is released, in this state, the motor 5 is powered off and stops running, the normally open type one-way braking mechanism 11 in the powered on and closed state locks the connecting shaft 9a to rotate in the reverse direction along with the flange, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate in the reverse direction along with the flange, and the, therefore, the brake is effectively maintained in a stable opening state, and in this state, the inner side surface of the flange plate 14a on the nut 14 and the inner side surface of the plate 15 at the inner end of the sleeve type push rod 8 are in a joint and pressing state.

2) And (3) realizing a braking process:

when braking is needed, the normally open type one-way brake mechanism 11 is powered off and reset to be in a normally open state, namely, the locking of the connecting shaft 9a is released, so that the connecting shaft 9a is in a reversible state, and the normally closed type one-way brake mechanism 10 is in a power-off closed state without influencing the reversal of the connecting shaft 9a, in the state, the first brake spring component 7 in a compressed state stretches, and pushes the sleeve type push rod 8 to extend outwards by acting on the disk component 15 at the inner end of the sleeve type push rod 8, and when the sleeve type push rod 8 extends outwards, because the inner side surface of the flange 14a on the nut 14 and the inner side surface of the disk component 15 at the inner end of the sleeve type push rod 8 are in a joint and pressing state, the disk component 15 at the inner end of the sleeve type push rod 8 pushes the flange 14a of the nut 14 to displace outwards, the nut 14 displaces outwards along the thread section 4b, and drives the thread rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a are in a reverse rotation state; under the action of the first brake spring member 7 continuing to stretch, as the sleeve type push rod 8 continues to extend outwards, the connecting lugs 8a at the two ends of the electric push rod device 2 respectively drive the driving ends 3c of the two brake arms to swing outwards, the brake members 3b at the brake ends of the two brake arms are quickly folded inwards along with the sleeve type push rod 8 until the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, the sleeve type push rod 8 stops extending outwards in the process that the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, due to the continuous stretching of the first brake spring member 7 and the action of kinetic energy formed by the rotating member in the rotating process, the threaded rotating shaft 4a continues to rotate reversely, and when the nut 14 continues to move outwards along the threaded section 4b, the flange 14a on the nut 14 is separated from the disk 15 at the inner end of the sleeve type push rod 8 along, the flange 14a starts to compress the second brake spring member 16, after the flange 14a is separated from the disk part 15 at the inner end of the sleeve type push rod 8, the acting force of the first brake spring member 7 continuing to stretch acts on the sleeve type push rod 8, and the driving end 3c of the brake arm is pushed by the connecting lug 8a to swing outwards, so that the friction plate 3d and the brake surface of the braked part are quickly attached and pressed to enter primary braking until primary braking is realized;

under the condition that the first brake spring member 7 realizes primary effective braking, or in the process that the first brake spring member 7 implements primary braking through the stretching action, when the brake clearance of the friction plate is enlarged due to abrasion, the first brake spring member 7 will continue to stretch for a certain stroke, although the brake effect is influenced to a certain degree by the continuous stretching stroke of the first brake spring member 7, the continuous stretching stroke of the first brake spring member 7 firstly enables the related rotating members to continue to form kinetic energy, and secondly compensates the enlarged brake clearance, so that the friction plate and the braked member are still kept in a fit and pressed state; in this state, because the rotating members such as the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a are in the reverse rotation state, the threaded rotating shaft 4a is continuously reversed, the nut 14 continues to move outwards along the threaded section 4b, as the nut 14 continues to further displace outwards along the threaded section 4b, the second braking spring member 16 is further compressed, the distance between the flange 14a on the nut 14 and the disc 15 at the inner end of the sleeve type push rod 8 increases, until when the threaded rotating shaft 4a stops rotating in the reverse direction and the nut 14 stops displacing outwards, the inner side surface of the flange 14a on the nut 14 is separated from the disc 15 at the inner end of the sleeve type push rod 8 to the distance shown in fig. 2, the second braking spring member 16 is in the state of being further compressed and energy-storing, and when the threaded rotating shaft 4a stops rotating in the reverse direction, the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of forward rotation (the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a cannot forward rotate therewith), so that the second brake spring member 16 is in a stable state of being further compressed and storing energy, under the state, the acting force of the expansion trend generated by the second brake spring member 16 which is further compressed and stored energy acts on the sleeve type push rod 8, the sleeve type push rod 8 continuously generates the trend of extending outwards, and the driving ends 3c of the two brake arms are further pushed to swing outwards, namely on the basis of primary braking, the brake members 3b of the brake ends 3a of the two brake arms obtain the brake power source again and are further folded inwards, so that the friction plates obtain the superposed brake acting force to realize superposed braking on the braked members, and the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of forward rotation, thereby effectively maintaining the brake in a stable state with reliable braking effect; the second brake spring component 16 in the state of being further compressed and accumulating energy realizes the superposition braking, and one is to further obtain the superposition braking in the state of realizing the first-stage effective braking by the first brake spring component 7, thereby improving the reliability of the braking effect; secondly, when the friction plate is abraded to cause the brake clearance to be enlarged, the friction plate and the braked component are in a joint and pressing state to obtain the superposed brake realized by the second brake spring component 16, and the enlarged brake clearance enables the continuous stretching stroke of the first brake spring component 7 to influence the brake effect to a certain extent, but the continuous stretching stroke of the first brake spring component 7 enables the related rotating component to continuously form kinetic energy, and the continuously formed kinetic energy can increase the further compression and energy storage effect of the second brake spring component 16, namely the superposed brake effect realized by the second brake spring component 16, so that the normally closed brake of the invention can still be in a stable and reliable brake state; compared with the prior art, the reliability of the braking effect is improved.

The invention has the technical effects that:

1. because the invention is provided with the first brake spring component 7 and the second brake spring component 16 at the same time, in the process of implementing braking, after the first brake spring component 7 is extended to realize primary braking, the second brake spring component 16 is further compressed and stored with energy due to the kinetic energy effect formed by the related rotating component in the process of implementing primary braking, the second brake spring component 16 which is further compressed and stored with energy realizes superposition braking under the action of extension trend generated by the second brake spring component 16, and the normally closed one-way brake device 10 in a closed state effectively maintains the brake in a stable state with reliable braking effect; the reliable braking effect of the brake is in a stable state, and compared with the prior art, the reliability of the braking effect is improved; moreover, the second brake spring member 16 is further compressed and charged during the implementation of the superposition braking, which is implemented by fully utilizing the kinetic energy effect formed by the reverse rotation of the related rotating member during the implementation of the primary braking, i.e. the second brake spring member 16 does not consume energy when the effect of realizing the superposition braking is satisfied.

2. In the process of implementing primary braking, when the friction plate is abraded to cause the brake clearance to be enlarged, the first brake spring member 7 continuously extends for a certain stroke, although the continuous extending stroke generated by the first brake spring member 7 can influence the braking effect to a certain degree, the first brake spring member 7 continuously extends for a certain stroke, so that the related rotating members continuously form kinetic energy, and meanwhile, the enlarged brake clearance is compensated, so that the friction plate and the braked member are still in a joint and compressed state to realize primary braking; after the primary braking is realized, the second braking spring component 16 is further compressed and stores energy due to the kinetic energy effect formed by the related rotating component in the primary braking, and the second braking spring component 16 which is further compressed and stores energy realizes the superposition braking due to the action of the stretching trend generated by the second braking spring component 16; moreover, although the extended braking clearance enables the continuous extension stroke of the first braking spring component 7 to influence the primary braking effect to a certain extent, the continuous extension stroke of the first braking spring component 7 enables the related rotating component to continuously form kinetic energy, and the continuously formed kinetic energy can increase the further compression and energy storage effects of the second braking spring component 16, namely increase the braking effect of the superposition braking realized by the second braking spring component 16, so that the normal close brake can still realize stable and reliable braking when the braking is implemented under the condition that the braking clearance is enlarged due to the abrasion of the friction plate; compared with the prior art, the reliability of the braking effect is improved, and the defect that the braking gap needs to be adjusted frequently in the prior art is overcome.

3. In the invention, under the braking state after the superposition braking is realized, when the friction plate is thinned due to abrasion and generates a relaxation trend with the braking surface of a braked member, because a certain distance is kept between the inner side surface of a flange plate 14a on a nut 14 and the inner side surface of a disc part 15 at the inner end of an extension type push rod 8 or between the outer side surface of the flange plate 14a on the nut 14 and the inner side surface of an end wall 8b of a sleeve type push rod 8 under the state, the first braking spring component 7 and the second braking spring component 16 under the braking state can rapidly generate the action of continuing the expansion trend, and the extension type push rod 8 is pushed to extend outwards or retract inwards by acting on the extension type push rod 8, so that certain clearance compensation can be carried out on the relaxation trend of the friction plate and the braking surface of the braked member, and the effective braking state that the friction plate 3d is jointed and pressed with the, the normally closed brake can still maintain an effective braking state when the friction plate is abraded in the braking state after the superposition braking is realized.

4. When the invention implements the first-stage braking, in the process that the friction plate 3d is rapidly attached to and pressed against the braking surface of the braked member and enters the first-stage braking, when the flange 14a is separated from the disk 15 at the inner end of the sleeve type push rod 8 or the flange 14a is separated from the end wall 8b of the sleeve type push rod 8, the extension acting force generated by the compression of the second braking spring member 16 acts on the flange 14a on the nut 14 and the disk 15 at the inner end of the sleeve type push rod 8 or the end wall 8b of the sleeve type push rod 8 which is still attached to the flange 14a, so that the extension acting force generated by the compression of the second braking spring member 16 has a buffer effect on the acting force of the continuous extension trend of the first braking spring member 7 acting on the disk 15, namely, the impact generated when the friction plate 3d is rapidly combined with and pressed against the braking surface of the braked member is buffered, the impact on the braked member can be reduced, the vibration generated by the brake and the braked equipment is reduced, and the damage to the components is avoided, so that the stability of the brake operation process is improved.

5. In the process of releasing the brake, after the normally closed one-way brake mechanism 10 is electrified to release the forward locking of the connecting shaft 9a, the second brake spring member 16 which is in a compressed state and stores energy starts to release energy and stretch to act on the flange 14a on the nut 14, so that the nut 14 starts to displace inwards or outwards along the threaded section 4b, thereby driving the threaded rotating shaft to rotate in the forward direction, after the motor 5 is electrified, the motor shaft 5a also drives the connecting shaft 9a and the threaded rotating shaft 4a to transmit in the forward direction, namely, in the process of releasing the superimposed brake, the second spring member 16 releases energy and stretches to assist the motor shaft 5a to drive the threaded rotating shaft 4a to rotate in the forward direction, the resultant force of the two can enable the threaded rotating shaft 4a to rotate in the forward direction rapidly, the nut 14 is accelerated to displace inwards or outwards along the threaded section 4b, and the time for releasing the brake and assisting the start of the motor are shortened, the energy consumption of the motor can be reduced.

Other technical effects will be further explained in the detailed description.

Drawings

Fig. 1 is a schematic structural diagram of a conventional normally closed brake;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention, and fig. 2 is determined as an abstract drawing;

FIG. 3 is a schematic sectional view taken along line A-A of the pusher assembly 4 of FIG. 2;

FIG. 4 is another embodiment of the cross-sectional structure of FIG. 3;

FIG. 5 is a schematic structural view of example 2;

FIG. 6 is a schematic structural view of embodiment 3;

FIG. 7 is a schematic structural view of example 4;

FIG. 8 is a schematic structural view of example 5;

FIG. 9 is a schematic structural view of example 6;

FIG. 10 is a schematic structural view of example 7;

FIG. 11 is a schematic structural view of example 8;

FIG. 12 is a schematic structural view of example 9;

FIG. 13 is a schematic structural view of example 10, showing a modified structure of the present invention;

fig. 14 shows the connection of the electric propulsion device 2 to the braking device 1 in another embodiment.

The cross-sectional schematic structure of the pusher device 4 in fig. 5 to 13 refers to the structure shown in fig. 3 and 4.

Detailed Description