Electric actuator with brake

Abstract

The invention discloses an electric actuator with a brake, and relates to the technical field of electric actuators. The electric actuator with the brake comprises a first shell, the top of the first shell is fixedly connected with a second shell and a control module, the interior of the first shell is fixedly connected with a first bearing, the interior of the first bearing is fixedly connected with a connecting rotating shaft, and the outer surface of the connecting rotating shaft is fixedly connected with a first gear and a worm gear; a worm is rotationally connected into the first shell, a connecting rod is fixedly connected to the end of the worm, a hand wheel is fixedly connected to the end of the connecting rod, a motor and a standby battery are fixedly connected into the second shell, the output end of the motor is fixedly connected with an output rotating shaft, and a braking module is arranged on the outer surface of the output rotating shaft. The output end of the output rotating shaft is fixedly connected with a telescopic air cylinder, the outer surface of the second shell is fixedly connected with a cooling device, the purposes of cooling and heat dissipation can be achieved, and the performance and the service life of the electric actuator are prevented from being affected.

Description

Technical Field

[0001] The invention relates to the technical field of electric actuators, in particular to an electric actuator with a brake. Background Art

[0002] The electric actuator is an important part of the automatic control system. It is used to receive control signals and convert them into power signals to drive the actuator to perform operations such as switching, adjusting, squeezing and blocking. The main function of the electric actuator is to receive the control signal sent by the controller, change the size of the controlled medium, and thus maintain the controlled variable at the required value or within a certain range. The working principle of the electric actuator is based on the rotation of the motor to control the opening and closing of the valve. When receiving the signal from the control system, the electric actuator will convert electrical energy into mechanical energy, and then drive the rotation of the valve. Electric actuators are widely used in the fields of electricity, petrochemicals, metallurgy, papermaking, light industry, environmental protection, etc., and are an important part of automatic control. Existing electric actuators need to convert electrical energy into mechanical energy during operation. This conversion process generates a lot of heat, which can easily cause the electric actuator to heat up and become hot. In the long run, it may cause damage to the equipment and affect its performance and life. Summary of the invention

[0003] In view of the shortcomings of the existing problems, the present invention provides an electric actuator with a brake to solve the existing problems raised in the above background technology.

[0004] To solve the above problems, the present invention is implemented through the following technical solutions: an electric actuator with a brake, comprising a first shell, a second shell and a control module are fixedly connected to the top of the first shell, a first bearing is fixedly connected to the interior of the first shell, a connecting shaft is fixedly connected to the interior of the first bearing, a first gear and a worm wheel are fixedly connected to the outer surface of the connecting shaft, a worm is rotatably connected to the interior of the first shell, a connecting rod is fixedly connected to the end of the worm, a hand wheel is fixedly connected to the end of the connecting rod, a motor and a backup battery are fixedly connected to the interior of the second shell, an output end of the motor is fixedly connected to the output shaft, a brake module is provided on the outer surface of the output shaft, and an output The output end is fixedly connected with a telescopic cylinder, the output end of the telescopic cylinder is fixedly connected with a second gear, the outer surface of the second shell is fixedly connected with a cooling device, the brake module includes a stator, a friction plate, a wheel hub, a leaf spring and an armature, a coil is arranged inside the stator, the cooling device includes a cooling shell and a water storage cylinder, a cooling chamber is arranged inside the cooling shell, a temperature sensor is fixedly connected with the inner surface of the cooling chamber, a first conduit is fixedly connected with the top of the water storage cylinder, a one-way valve is fixedly connected with the outer surface of the first conduit, a refrigeration plate is fixedly connected with the inside of the water storage cylinder, a water pump is arranged below the water storage cylinder, the top of the water pump is fixedly connected with the second conduit, and the bottom of the water pump is fixedly connected with the third conduit.

[0005] Preferably, the outer surface of the worm wheel is meshed with the outer surface of the worm, the outer surface of the connecting rod passes through the first housing and extends to the outside, and the hand wheel is arranged on the outside of the first housing.

[0006] Preferably, the outer surface of the telescopic cylinder extends to the inner cavity of the first shell, and the outer surface of the first gear is meshed with the outer surface of the second gear.

[0007] Preferably, a second bearing is fixedly connected to the outer surface of the telescopic cylinder, and an outer surface of the second bearing is fixedly connected to the inner surface of the second shell.

[0008] Preferably, a first bolt is provided in the mounting hole on the outer surface of the stator, the stator is connected to the bottom of the motor via the first bolt, and the outer surface of the friction plate is fixedly connected to the lower surface of the stator.

[0009] Preferably, the leaf spring is arranged on the upper surface of the wheel hub, the armature is arranged on the upper surface of the leaf spring, a second bolt is arranged in the mounting hole of the wheel hub, and the wheel hub, the leaf spring and the armature are connected by the second bolt.

[0010] Preferably, the inner surface of the cooling shell is fixedly connected to the outer surface of the second shell, the outer surface of the water storage cylinder is fixedly connected to the outer surface of the cooling shell, the outer surface of the water pump is fixedly connected to a fixing plate, and the outer surface of the fixing plate is fixedly connected to the outer surface of the first shell.

[0011] Preferably, ends of the first conduit and the second conduit both penetrate the water storage cylinder and extend to the inner cavity, and ends of the first conduit and the second conduit away from the water storage cylinder both penetrate the cooling shell and extend to the inner cavity.

[0012] The present invention provides an electric actuator with a brake, which has the following beneficial effects:

[0013] 1. The electric actuator with a brake can make the heat generated by the electric actuator absorbed by the cold water in the cooling chamber through the cooling device, with the cooperation of the water storage cylinder, the refrigeration plate, the water pump, the second conduit, the third conduit and the cooling shell, so as to achieve the purpose of cooling and heat dissipation, so as to avoid affecting the performance and life of the electric actuator. At the same time, with the cooperation of the temperature sensor, the first conduit and the one-way valve, when the temperature sensor detects that the temperature in the cooling chamber rises to a preset value, the heated water in the cooling chamber returns to the water storage cylinder through the first conduit under the action of the pressure difference, so as to realize the recycling of water, thereby achieving efficient cooling and further extending the service life of the electric actuator.

[0014] Second, the electric actuator with brake uses a brake module and a backup battery. When the electric actuator is powered off, the backup battery provides power to the brake module, causing the connecting shaft to stop rotating immediately, thereby achieving an emergency stop of the electric actuator, reducing the wear on the internal structure of the electric actuator, and further improving the protection of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0017] Figure 3 It is a partial structural schematic diagram of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the brake module of the present invention;

[0019] Figure 5 It is a schematic structural diagram of the cooling device of the present invention.

[0020] In the figure: 1, first housing; 2, second housing; 3, connecting shaft; 4, first bearing; 5, first gear; 6, worm gear; 7, worm; 8, connecting rod; 9, hand wheel; 10, motor; 11, output shaft; 12, telescopic cylinder; 13, second gear; 14, second bearing; 15, brake module; 1501, stator; 1502, friction plate; 1503, wheel hub; 1504, leaf spring; 1505, armature; 1506, The first bolt; 1507, the second bolt; 1508, the coil; 16, the cooling device; 1601, the cooling shell; 1602, the water storage cylinder; 1603, the cooling chamber; 1604, the temperature sensor; 1605, the first conduit; 1606, the one-way valve; 1607, the cooling plate; 1608, the water pump; 1609, the second conduit; 1610, the third conduit; 1611, the fixing plate; 17, the control module; 18, the backup battery. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0022] Example 1

[0023] like Figure 1-Figure 5As shown, the present invention provides a technical solution: an electric actuator with a brake, comprising a first housing 1, a second housing 2 and a control module 17 are fixedly connected to the top of the first housing 1, a first bearing 4 is fixedly connected to the interior of the first housing 1, a connecting shaft 3 is fixedly connected to the interior of the first bearing 4, a first gear 5 and a worm wheel 6 are fixedly connected to the outer surface of the connecting shaft 3, a worm 7 is rotatably connected to the interior of the first housing 1, a connecting rod 8 is fixedly connected to the end of the worm 7, a hand wheel 9 is fixedly connected to the end of the connecting rod 8, a motor 10 and a backup battery 18 are fixedly connected to the interior of the second housing 2, an output end of the motor 10 is fixedly connected to an output shaft 11, a brake module 15 is provided on the outer surface of the output shaft 11, a telescopic cylinder 12 is fixedly connected to the output end of the output shaft 11, a second gear 13 is fixedly connected to the output end of the telescopic cylinder 12, and the second housing 2 is fixedly connected to the output shaft 11. A cooling device 16 is fixedly connected to the outer surface. The brake module 15 includes a stator 1501, a friction plate 1502, a wheel hub 1503, a leaf spring 1504 and an armature 1505. A coil 1508 is arranged inside the stator 1501. The cooling device 16 includes a cooling shell 1601 and a water storage cylinder 1602. A cooling chamber 1603 is arranged inside the cooling shell 1601. A temperature sensor 1604 is fixedly connected to the inner surface of the cooling chamber 1603. A first conduit 1605 is fixedly connected to the top of the water storage cylinder 1602. A one-way valve 1606 is fixedly connected to the outer surface of the first conduit 1605. A cooling plate 1607 is fixedly connected to the inside of the water storage cylinder 1602. A water pump 1608 is arranged below the water storage cylinder 1602. A second conduit 1609 is fixedly connected to the top of the water pump 1608. A third conduit 1610 is fixedly connected to the bottom of the water pump 1608.

[0024] The outer surface of the worm wheel 6 is meshed with the outer surface of the worm 7 , the outer surface of the connecting rod 8 passes through the first housing 1 and extends to the outside, and the hand wheel 9 is arranged on the outside of the first housing 1 .

[0025] The outer surface of the telescopic cylinder 12 extends to the inner cavity of the first housing 1 , and the outer surface of the first gear 5 meshes with the outer surface of the second gear 13 .

[0026] The outer surface of the telescopic cylinder 12 is fixedly connected to a second bearing 14 , and the outer surface of the second bearing 14 is fixedly connected to the inner surface of the second housing 2 .

[0027] A first bolt 1506 is provided in the mounting hole on the outer surface of the stator 1501 , and the stator 1501 is connected to the bottom of the motor 10 via the first bolt 1506 . The outer surface of the friction plate 1502 is fixedly connected to the lower surface of the stator 1501 .

[0028] The leaf spring 1504 is arranged on the upper surface of the wheel hub 1503 , the armature 1505 is arranged on the upper surface of the leaf spring 1504 , a second bolt 1507 is arranged in the mounting hole of the wheel hub 1503 , and the wheel hub 1503 , the leaf spring 1504 and the armature 1505 are connected by the second bolt 1507 .

[0029] The inner surface of the cooling shell 1601 is fixedly connected to the outer surface of the second shell 2, the outer surface of the water storage cylinder 1602 is fixedly connected to the outer surface of the cooling shell 1601, the outer surface of the water pump 1608 is fixedly connected to the fixing plate 1611, and the outer surface of the fixing plate 1611 is fixedly connected to the outer surface of the first shell 1.

[0030] The ends of the first conduit 1605 and the second conduit 1609 both penetrate the water storage cylinder 1602 and extend to the inner cavity, and the ends of the first conduit 1605 and the second conduit 1609 away from the water storage cylinder 1602 both penetrate the cooling shell 1601 and extend to the inner cavity.

[0031] When in use, when the electric actuator receives a start signal from the control module 17, the control module 17 will output current to the motor 10 to rotate the motor 10. When the motor 10 rotates, torque will be generated, thereby driving the second gear 13 to rotate, and the first gear 5 will rotate accordingly, and drive the connecting shaft 3 to rotate to achieve mechanical action. The control module 17 can also control the speed and torque of the motor 10 by adjusting the current and voltage of the motor 10, thereby achieving precise automatic control. A large amount of heat is generated during the operation of the electric actuator. The first shell 1 and the second shell 2 are made of metal materials with good thermal conductivity. Water is provided inside the water storage cylinder 1602. The cooling plate 1607 is energized to turn the water in the water storage cylinder 1602 into cold water, and the water pump 1608 is started, so that the cold water in the water storage cylinder 1602 is drawn out by the second conduit 1609 and introduced into the cooling chamber 1603 in the cooling shell 1601 through the third conduit 1610. According to the principle of heat conduction, heat will be transferred from the part with higher temperature of the object along the object to the part with lower temperature, thereby causing the electric actuator to produce The heat generated is absorbed by the cold water in the cooling chamber 1603 to achieve the purpose of cooling and heat dissipation. When the temperature sensor 1604 detects that the temperature in the cooling chamber 1603 rises to a preset value, the one-way valve 1606 automatically opens. Since the pressure in the cooling chamber 1603 is greater than the pressure in the water storage cylinder 1602, the heated water in the cooling chamber 1603 returns to the water storage cylinder 1602 through the first conduit 1605 under the action of the pressure difference. After the water is cooled again by the refrigeration effect of the refrigeration plate 1607 in the water storage cylinder 1602, it is cooled again. The water pump 1608 introduces cold water into the cooling chamber 1603 to achieve water recycling and thus efficient cooling. When the electric actuator is powered off, the backup battery 18 provides power to the brake module 15 and the telescopic cylinder 12. The telescopic cylinder 12 shortens so that the second gear 13 leaves the first gear 5. The coil 1508 in the stator 1501 generates electromagnetic force and attracts the armature 1505, so that the connecting shaft 3 stops rotating immediately, thereby achieving an emergency stop of the electric actuator and reducing the wear on the internal structure of the electric actuator.

[0032] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An electric actuator with a brake, comprising a first housing (1), characterized in that: The top of the first housing (1) is fixedly connected to the second housing (2) and the control module (17); the interior of the first housing (1) is fixedly connected to the first bearing (4); the interior of the first bearing (4) is fixedly connected to the connecting shaft (3); the outer surface of the connecting shaft (3) is fixedly connected to the first gear (5) and the worm wheel (6); the interior of the first housing (1) is rotatably connected to the worm (7); the end of the worm (7) is fixedly connected to the connecting rod (8); the end of the connecting rod (8) is fixedly connected to the connecting rod (9); A hand wheel (9) is connected, a motor (10) and a backup battery (18) are fixedly connected inside the second housing (2), an output end of the motor (10) is fixedly connected to an output shaft (11), an outer surface of the output shaft (11) is provided with a brake module (15), an output end of the output shaft (11) is fixedly connected to a telescopic cylinder (12), an output end of the telescopic cylinder (12) is fixedly connected to a second gear (13), and a cooling device (16) is fixedly connected to the outer surface of the second housing (2) The brake module (15) comprises a stator (1501), a friction plate (1502), a wheel hub (1503), a leaf spring (1504) and an armature (1505); a coil (1508) is arranged inside the stator (1501); the cooling device (16) comprises a cooling shell (1601) and a water storage cylinder (1602); a cooling chamber (1603) is arranged inside the cooling shell (1601); a temperature sensor (1604) is fixedly connected to the inner surface of the cooling chamber (1603); ), the top of the water storage cylinder (1602) is fixedly connected to a first conduit (1605), the outer surface of the first conduit (1605) is fixedly connected to a one-way valve (1606), the interior of the water storage cylinder (1602) is fixedly connected to a cooling plate (1607), a water pump (1608) is arranged below the water storage cylinder (1602), the top of the water pump (1608) is fixedly connected to a second conduit (1609), and the bottom of the water pump (1608) is fixedly connected to a third conduit (1610).

2. The electric actuator with brake according to claim 1, characterized in that: The outer surface of the worm wheel (6) meshes with the outer surface of the worm (7), the outer surface of the connecting rod (8) penetrates the first housing (1) and extends to the outside, and the hand wheel (9) is arranged on the outside of the first housing (1).

3. The electric actuator with brake according to claim 1, characterized in that: The outer surface of the telescopic cylinder (12) extends to the inner cavity of the first housing (1), and the outer surface of the first gear (5) meshes with the outer surface of the second gear (13).

4. The electric actuator with brake according to claim 1, characterized in that: The outer surface of the telescopic cylinder (12) is fixedly connected to a second bearing (14), and the outer surface of the second bearing (14) is fixedly connected to the inner surface of the second housing (2).

5. The electric actuator with brake according to claim 1, characterized in that: A first bolt (1506) is arranged in a mounting hole on the outer surface of the stator (1501), and the stator (1501) is connected to the bottom of the motor (10) via the first bolt (1506), and the outer surface of the friction plate (1502) is fixedly connected to the lower surface of the stator (1501).

6. The electric actuator with brake according to claim 1, characterized in that: The leaf spring (1504) is arranged on the upper surface of the wheel hub (1503), the armature (1505) is arranged on the upper surface of the leaf spring (1504), a second bolt (1507) is arranged in the mounting hole of the wheel hub (1503), and the wheel hub (1503), the leaf spring (1504) and the armature (1505) are connected by the second bolt (1507).

7. The electric actuator with brake according to claim 1, characterized in that: The inner surface of the cooling shell (1601) is fixedly connected to the outer surface of the second shell (2), the outer surface of the water storage cylinder (1602) is fixedly connected to the outer surface of the cooling shell (1601), the outer surface of the water pump (1608) is fixedly connected to a fixing plate (1611), and the outer surface of the fixing plate (1611) is fixedly connected to the outer surface of the first shell (1).

8. The electric actuator with brake according to claim 1, characterized in that: The ends of the first conduit (1605) and the second conduit (1609) both pass through the water storage cylinder (1602) and extend to the inner cavity, and the ends of the first conduit (1605) and the second conduit (1609) away from the water storage cylinder (1602) both pass through the cooling shell (1601) and extend to the inner cavity.

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