A push rod DC motor with a brake device

Abstract

The present invention discloses a push rod DC motor with a brake device, which relates to the technical field of push rod motors. The main structure includes a motor assembly, a brake assembly and a front end cover assembly; the brake assembly is arranged at the rear end of the motor assembly, and the front end cover assembly is arranged at the front end of the motor assembly; the front end cover assembly is used to detect the rotation speed of the rotating shaft in the motor assembly. The brake assembly uses a brake spring to make multiple brake pads hold the rotating shaft of the motor assembly. Only when the rotating shaft rotates in the forward direction, the brake spring releases the brake by relying on the friction between the rotating shaft and the multiple brake pads. When the rotating shaft reverses, the brake spring holds the multiple brake pads to further increase the braking force, thereby avoiding the reversal of the rotating shaft; at the same time, the rotation speed of the rotating shaft is detected by the front end cover assembly, so as to adjust the working state of the push rod DC motor.

Description

Technical Field

[0001] The invention relates to the technical field of push rod motors, in particular to a push rod DC motor with a brake device. Background Art

[0002] The push rod DC motor is a universal auxiliary drive device, which can be widely used in electricity, machinery, metallurgy, transportation, mining, petroleum, chemical industry, heavy lifting, transportation, construction, grain and feed processing and other industries. It has the characteristics of reliable performance, sensitive action, smooth operation, equal push and pull force, good environmental adaptability, etc. The push rod DC motor is an electric drive device that converts the rotational motion of the motor into the linear reciprocating motion of the push rod. It can be used as an executive machine in various simple or complex process flows to achieve remote control, centralized control or automatic control.

[0003] The push rod DC motor usually includes a motor, which drives the transmission screw to rotate. When the transmission screw rotates, it drives the nut to reciprocate. The electric push rod is usually provided with a motor brake device.

[0004] Existing push rod DC motors cannot directly detect the rotation speed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a push rod DC motor with a brake device, which can detect the rotation speed of the push rod DC motor when it is working.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a push rod DC motor with a brake device, comprising a motor assembly, a brake assembly and a front end cover assembly; the brake assembly is arranged at the rear end of the motor assembly, and the front end cover assembly is arranged at the front end of the motor assembly; the front end cover assembly is used to detect the rotation speed of the rotating shaft in the motor assembly.

[0008] Optionally, the motor assembly includes a casing, a rear end cover, a rotating shaft, a rotor, a magnetic shoe, a commutator, a front end plate and a rear end plate; the rear end cover is arranged at the rear end of the casing; the front end cover assembly is arranged at the front end of the casing; the rotating shaft passes through the rear end cover and the front end cover assembly; the brake assembly is arranged on the rear end cover, and the brake assembly is sleeved on the rear end of the rotating shaft; the magnetic shoe is arranged on the inner wall of the casing; the rotor is sleeved on the rotating shaft and corresponds to the position of the magnetic shoe; the front end plate and the rear end plate are both sleeved on the rotating shaft and are respectively located at the front end and the rear end of the rotor, and the commutator is sleeved on the rotating shaft and is located at the front end of the front end plate.

[0009] Optionally, the brake assembly includes a brake ring, a brake spring, a brake cover and a fastening screw; the brake cover is provided with a receiving hole, the brake ring is arranged in the receiving hole, the brake spring is sleeved on the outside of the brake ring, and the fastening screw is used to connect the brake cover and the motor assembly.

[0010] Optionally, the brake ring includes a plurality of brake pads, and the plurality of brake pads form a circular ring shape.

[0011] Optionally, the front end cover assembly includes a front end cover and a detection assembly, the detection assembly is arranged on a side of the front end cover facing the motor assembly, and the front end cover is used to be connected to the motor assembly.

[0012] Optionally, the detection component includes a copper clad board, a through hole is arranged in the middle of the copper clad board, and an inductor, a Y capacitor, a copper brush box, a thermostat, a chip resistor, a Hall element and a chip capacitor are arranged around the through hole; the copper brush box is arranged with an opening on one side facing the through hole, a carbon brush is arranged in the copper brush box, and a spring is arranged between the carbon brush and the other side of the copper brush box.

[0013] Optionally, the carbon brush is connected to one electrode of the inductor via an elastic wire.

[0014] Optionally, the detection assembly further includes a magnetic ring sleeved on the rotating shaft of the motor assembly.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The push rod DC motor with a brake device in the present invention mainly comprises a motor assembly, a brake assembly and a front end cover assembly; wherein the brake assembly enables a plurality of brake pads to hold the rotating shaft of the motor assembly through a brake spring, and only when the rotating shaft rotates in the forward direction, the brake spring releases the brake by relying on the friction between the rotating shaft and the plurality of brake pads, and when the rotating shaft reverses, the brake spring holds the plurality of brake pads to further increase the braking force, thereby preventing the rotating shaft from reversing; at the same time, the rotation speed of the rotating shaft is detected by the front end cover assembly, so as to adjust the working state of the push rod DC motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a push rod DC motor with a brake device of the present invention;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of a push rod DC motor with a brake device of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a brake assembly in a push rod DC motor with a brake device of the present invention;

[0021] Figure 4 It is a schematic diagram of the structural decomposition of the brake assembly in the push rod DC motor with a brake device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the front end cover assembly of the push rod DC motor with a brake device of the present invention;

[0023] Figure 6 It is a schematic diagram of the structural decomposition of the front end cover assembly of the push rod DC motor with a brake device of the present invention;

[0024] Figure 7 The figure is a schematic diagram of the structural decomposition of the push rod DC motor with a brake device of the present invention.

[0025] Description of reference numerals: 1, rotating shaft; 2, front end cover assembly; 3, housing; 4, rear end cover; 5, brake assembly;

[0026] 01. Circlip; 02. Rolling bearing; 03. Magnetic ring; 04. Enameled wire; 05. First screw; 06. Magnetic tile fixing plate; 07. Magnetic tile; 08. Rear end plate; 09. Slot insulation paper; 10. Rotor core; 11. Front end plate; 12. Commutator;

[0027] 21. Front cover; 22. Copper brush box; 23. Spring; 24. Carbon brush; 25. Copper clad plate; 26. Thermostat; 27. Second screw; 28. Inductor; 29. ​​Y capacitor; 30. Chip resistor; 31. Hall element; 32. Chip capacitor;

[0028] 51. Brake ring; 52. Brake spring; 53. Brake cover; 54. Fastening screw. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 7As shown, this embodiment provides a push rod DC motor with a brake device, including a motor assembly, a brake assembly 5 and a front end cover assembly 2; the brake assembly 5 is arranged at the rear end of the motor assembly, and the front end cover assembly 2 is arranged at the front end of the motor assembly; the front end cover assembly 2 is used to detect the rotation speed of the rotating shaft 1 in the motor assembly.

[0031] In this specific embodiment, the motor assembly includes a casing 3, a rear end cover 4, a rotating shaft 1, a rotor, a magnetic tile 07, a commutator 12, a front end plate 11 and a rear end plate 08; the rear end cover 4 is arranged at the rear end of the casing 3; the front end cover assembly 2 is arranged at the front end of the casing 3; the rotating shaft 1 passes through the rear end cover 4 and the front end cover assembly 2; the brake assembly 5 is arranged on the rear end cover 4, and the brake assembly 5 is sleeved on the rear end of the rotating shaft 1; the magnetic tile 07 is arranged on the inner wall of the casing 3; the rotor is sleeved on the rotating shaft 1 and corresponds to the position of the magnetic tile 07; the front end plate 11 and the rear end plate 08 are both sleeved on the rotating shaft 1 and are respectively located at the front end and rear end of the rotor, and the commutator 12 is sleeved on the rotating shaft 1 and is located at the front end of the front end plate 11. More specifically, the rotor includes a rotor core 10 , a slot insulation paper 09 is provided on the slot of the rotor core 10 , and a coil wound by an enameled wire 04 is provided in the slot of the rotor core 10 and outside the slot insulation paper 09 .

[0032] The brake assembly 5 includes a brake ring 51, a brake spring 52, a brake cover 53 and a fastening screw 54. The brake cover 53 is provided with a receiving hole, the brake ring 51 is arranged in the receiving hole, the brake spring 52 is sleeved on the outside of the brake ring 51, and the fastening screw 54 is used to connect the brake cover 53 with the motor assembly. The brake ring 51 includes three brake pads, and the three brake pads are surrounded in a circular ring shape. Furthermore, the brake spring 52 is a torsion spring, and the spiral direction of the brake spring 52 is opposite to the normal rotation direction of the shaft 1. Therefore, when the shaft 1 rotates normally, the shaft 1 rubs against the three brake pads, causing the three brake pads to expand radially outward, causing the brake spring 52 to twist in the direction opposite to the spiral direction, thereby reducing the holding force of the brake spring 52 on the three brake pads to release the brake. When the shaft 1 receives an external force and tends to rotate in the opposite direction, the friction between the shaft 1 and the three brake pads drives the brake spring 52 to twist in the spiral direction, further increasing the holding force of the brake spring 52 on the three brake pads to increase the braking force and prevent the shaft 1 from reversing.

[0033] The front end cover assembly 2 includes a front end cover 21 and a detection assembly. The detection assembly is arranged on a side of the front end cover 21 facing the motor assembly. The front end cover 21 is used to be connected to the motor assembly.

[0034] The detection component includes a copper clad plate 25, a through hole is provided in the middle of the copper clad plate 25, and an inductor 28, a Y capacitor 29, a copper brush box 22, a thermostat 26, a chip resistor 30, a Hall element 31 and a chip capacitor 32 are provided around the through hole; the copper brush box 22 is provided with an opening toward one side of the through hole, a carbon brush 24 is provided in the copper brush box 22, and a spring 23 is provided between the carbon brush 24 and the other side of the copper brush box 22. The carbon brush 24 is connected to one electrode of the inductor 28 through an elastic wire. The detection component also includes a magnetic ring 03 sleeved on the rotating shaft 1 of the motor component. The frequency change of the magnetic field of the magnetic ring 03 is sensed by the Hall element 31 to detect the rotation speed of the rotating shaft 1. One side of the copper brush box 22 is provided in a long groove, which extends from the open end of the copper brush box 22 to the middle of the copper brush box 22, one end of the elastic wire is connected to the carbon brush 24, and the other end passes through the long groove and contacts with one electrode of the inductor 28.

[0035] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A push rod DC motor with a brake device, characterized in that: It includes a motor assembly, a brake assembly and a front end cover assembly; the brake assembly is arranged at the rear end of the motor assembly, and the front end cover assembly is arranged at the front end of the motor assembly; the front end cover assembly is used to detect the rotation speed of the rotating shaft in the motor assembly; The brake assembly comprises a brake ring and a brake spring, wherein the brake spring is sleeved outside the brake ring; the spiral direction of the brake spring is opposite to the normal rotation direction of the rotating shaft in the motor assembly; The brake ring includes a plurality of brake pads, and the plurality of brake pads are arranged in a circular ring shape.

2. The push rod DC motor with a brake device according to claim 1, characterized in that: The motor assembly includes a casing, a rear end cover, a rotating shaft, a rotor, a magnetic shoe, a commutator, a front end plate and a rear end plate; the rear end cover is arranged at the rear end of the casing; the front end cover assembly is arranged at the front end of the casing; the rotating shaft passes through the rear end cover and the front end cover assembly; the brake assembly is arranged on the rear end cover, and the brake assembly is sleeved on the rear end of the rotating shaft; the magnetic shoe is arranged on the inner wall of the casing; the rotor is sleeved on the rotating shaft and corresponds to the position of the magnetic shoe; the front end plate and the rear end plate are both sleeved on the rotating shaft and are respectively located at the front end and the rear end of the rotor, and the commutator is sleeved on the rotating shaft and is located at the front end of the front end plate.

3. The push rod DC motor with a brake device according to claim 1, characterized in that: The brake assembly includes a brake cover and a fastening screw; the brake cover is provided with a receiving hole, the brake ring is arranged in the receiving hole, and the fastening screw is used for connecting the brake cover with the motor assembly.

4. The push rod DC motor with a brake device according to claim 1, characterized in that: The front end cover assembly comprises a front end cover and a detection assembly. The detection assembly is arranged on a side of the front end cover facing the motor assembly. The front end cover is used to be connected to the motor assembly.

5. The push rod DC motor with a brake device according to claim 4, characterized in that: The detection component includes a copper clad board, a through hole is arranged in the middle of the copper clad board, and an inductor, a Y capacitor, a copper brush box, a thermostat, a chip resistor, a Hall element and a chip capacitor are arranged around the through hole; the copper brush box is arranged with an opening on one side facing the through hole, a carbon brush is arranged in the copper brush box, and a spring is arranged between the carbon brush and the other side of the copper brush box.

6. The push rod DC motor with a brake device according to claim 5, characterized in that: The carbon brush is connected to one electrode of the inductor via an elastic wire.

7. The push rod DC motor with a brake device according to claim 4, characterized in that: The detection component also includes a magnetic ring sleeved on the rotating shaft of the motor component.

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