Motor rotor brake device

Abstract

The utility model provides a motor rotor brake device, including a base, a driving motor, a screw, a push block, a push rod and a brake assist mechanism, wherein the base is arranged on a shell, an inner cavity is opened in the shell, the driving motor is fixedly arranged on the base and located in the inner cavity, four groups of limit rods are fixedly arranged on the base, the screw is arranged between the four groups of limit rods, the screw is rotatably connected to the base and located in the inner cavity, and the screw is dynamically connected to the driving motor. This solution fine-tunes the adaptive gap between the top block and the inner tank, assists the motor rotor to stop from the terminal of the power system, avoids the need for the screw to stop instantly when the push rod moves to the extreme position, and prevents the screw from being blocked when the push rod runs to the positions at both ends of the stroke, causing the motor to overload or even burn, thereby improving the safety of the electric push rod during use.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control equipment, in particular to a motor rotor brake device. Background Art

[0002] As an indispensable power source in modern industry and life, the operating stability and safety of motors are directly related to the operating efficiency and service life of the equipment. During the operation of the motor, the control of the rotor is particularly critical, especially when the motor needs to stop or slow down. How to achieve smooth and reliable braking to prevent the motor from continuing to rotate due to inertia has become a research hotspot in the field of motor technology.

[0003] However, traditional motor braking methods often use mechanical braking or electrical braking. Although mechanical braking is simple and direct, it has problems such as rapid wear and high maintenance costs; and although electrical braking can control the braking process more accurately, it often requires additional braking circuits and control devices, which increases the complexity and cost of the system, and still cannot prevent the push rod from causing the lead screw to stall when it runs to the two ends of the stroke, causing the motor to overload or even burn out, affecting the safety of the electric push rod during use. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a motor rotor brake device, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a motor rotor brake device, comprising a base, a drive motor, a screw, a push block, a push rod and a brake assisting mechanism, the base is arranged on a shell, an inner cavity is opened in the shell, the drive motor is fixedly arranged on the base and is located in the inner cavity, four groups of limit rods are fixedly arranged on the base, the screw rod is arranged between the four groups of limit rods, the screw rod is rotatably connected to the base and is located in the inner cavity, the screw rod and the drive motor are dynamically connected, the push block is sleeved on the outer cylindrical surface of the screw rod, the limit rod penetrates the push block, the push block and the limit rod are slidably connected, the push block and the screw rod are threadedly connected, a hollow cavity is opened in the push rod, the push rod is sleeved on the screw rod through the hollow cavity, and the brake assisting mechanism is arranged in the hollow cavity.

[0008] Preferably, the push rod is located on the upper side of the push block, and the push rod and the push block are fixedly connected via a connecting piece.

[0009] Preferably, an inner liner is fixedly provided on the inner wall of the hollow cavity, and the upper end surface of the inner liner is chamfered.

[0010] Preferably, the brake assist mechanism includes a top block, an electromagnet gasket and a spring, a plurality of groups of slide grooves are opened in the inner tank, the electromagnet gasket is fixedly arranged on the bottom wall of the slide groove, the top block is electrically connected to the control center, the top block is slidably arranged in the slide groove, the spring is fixedly arranged between the bottom wall of the slide groove and the top block, and the magnetic poles of the top block and the electromagnet gasket are opposite.

[0011] Preferably, the top block is perpendicular to the upper end surface of the inner tank, a groove is provided on the upper side of the screw rod, and the taper of the annular surface of the upper wall of the groove is the same as the taper of the slide groove.

[0012] (III) Beneficial effects

[0013] The utility model provides a motor rotor brake device, which has the following beneficial effects:

[0014] 1. This solution fine-tunes the adaptive gap between the top block and the inner tank, and assists the motor rotor to stop from the terminal of the power system, avoiding the need for the lead screw to stop instantly when the push rod moves to the extreme position, and preventing the lead screw from being blocked when the push rod runs to the two ends of the stroke, causing the motor to overload or even burn out, thereby improving the safety of the electric push rod during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 11, base; 12, shell; 13, inner cavity; 14, driving motor; 15, limit rod; 16, screw rod; 17, push block; 18, connecting piece; 20, push rod; 21, hollow cavity; 22, liner; 23, slide groove; 24, top block; 25, electromagnet gasket; 26, spring; 27, groove. DETAILED DESCRIPTION

[0019] The utility model provides a motor rotor brake device, such as Figure 1-3As shown, it includes a base 11, a driving motor 14, a screw 16, a push block 17, a push rod 20 and a brake assist mechanism. The base 11 is arranged on a shell 12, and an inner cavity 13 is opened in the shell 12. The driving motor 14 is fixedly arranged on the base 11 and is located in the inner cavity 13. Four groups of limit rods 15 are fixedly arranged on the base 11. The screw 16 is arranged between the four groups of limit rods 15. The screw 16 is rotatably connected to the base 11 and is located in the inner cavity 13. The screw 16 is dynamically connected to the driving motor 14, as shown in FIG. Figure 2 As shown, the push block 17 is sleeved on the outer cylindrical surface of the screw rod 16, the limit rod 15 passes through the push block 17, the push block 17 and the limit rod 15 are slidingly connected, the push block 17 and the screw rod 16 are threadedly connected, a hollow cavity 21 is opened in the push rod 20, the push rod 20 is sleeved on the screw rod 16 through the hollow cavity 21, and the brake auxiliary mechanism is arranged in the hollow cavity 21.

[0020] The push rod 20 is located on the upper side of the push block 17 , and the push rod 20 and the push block 17 are fixedly connected via a connecting member 18 .

[0021] An inner liner 22 is fixedly disposed on the inner wall of the hollow cavity 21 , and the upper end surface of the inner liner 22 is chamfered.

[0022] like Figure 3 As shown, the brake assist mechanism includes a top block 24, an electromagnet gasket 25 and a spring 26. A plurality of slide grooves 23 are provided in the inner shell 22. The electromagnet gasket 25 is fixed on the bottom wall of the slide groove 23. The top block 24 is electrically connected to the control center. The top block 24 is slidably disposed in the slide groove 23. The spring 26 is fixed between the bottom wall of the slide groove 23 and the top block 24. The magnetic poles of the top block 24 and the electromagnet gasket 25 are opposite.

[0023] The top block 24 is perpendicular to the upper end surface of the inner liner 22. A groove 27 is provided on the upper side of the screw rod 16. The taper of the upper wall annular surface of the groove 27 is the same as that of the slide groove 23. The inner annular surface of the groove 27 is a smooth curved surface.

[0024] The driving motor 14 drives the screw rod 16 to rotate, and the screw rod 16 drives the push block 17 to rise and fall through the outer cylindrical thread. The push block 17 drives the push rod 20 to rise and fall through the connecting piece 18, and then pushes and pulls. The push rod 20 drives the inner liner 22 to move synchronously, and the inner liner 22 drives the top block 24 to move axially along the outer cylindrical surface of the screw rod 16. When the top block 24 moves into the groove 27, the control electromagnet gasket 25 is powered off, and the spring 26 pushes the top block 24 to the side away from the inner liner 22 through the elastic force, so that the top block 24 and the groove 27 are aligned. The inner annular surfaces abut against each other. At this time, the push rod 20 continues to drive the top block 24 to move through the inner liner 22. When the surface of the top block 24 abuts against the upper wall annular surface of the groove 27, it is the upper limit position. The adaptive gap between the top block 24 and the inner liner 22 is used for fine adjustment to avoid the need for the lead screw 16 to stop instantly when the push rod 20 moves to the limit position, to prevent the lead screw 16 from being blocked when the push rod 20 runs to the two end positions of the stroke, causing the motor to overload or even burn out, thereby improving the safety of the electric push rod during use.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor rotor brake device, characterized in that: The invention comprises a base (11), a driving motor (14), a screw rod (16), a push block (17), a push rod (20) and a brake assist mechanism, wherein the base (11) is arranged on a shell (12), an inner cavity (13) is provided in the shell (12), the driving motor (14) is fixedly arranged on the base (11) and is located in the inner cavity (13), four groups of limit rods (15) are fixedly arranged on the base (11), the screw rod (16) is arranged between the four groups of limit rods (15), the screw rod (16) is rotatably connected to the base (11) and is located in the inner cavity (13), and the push rod (20) is provided with a plurality of push rods (15) and a plurality of push rods (15) disposed between the four groups of limit rods (15). 13), the screw rod (16) and the driving motor (14) are dynamically connected, the push block (17) is sleeved on the outer cylindrical surface of the screw rod (16), the limit rod (15) passes through the push block (17), the push block (17) and the limit rod (15) are slidably connected, the push block (17) and the screw rod (16) are threadedly connected, a hollow cavity (21) is opened in the push rod (20), the push rod (20) is sleeved on the screw rod (16) through the hollow cavity (21), and the brake auxiliary mechanism is arranged in the hollow cavity (21).

2. The motor rotor brake device according to claim 1, characterized in that: The push rod (20) is located on the upper side of the push block (17), and the push rod (20) and the push block (17) are fixedly connected via a connecting piece (18).

3. The motor rotor brake device according to claim 1, characterized in that: An inner liner (22) is fixedly provided on the inner wall of the hollow cavity (21), and the upper end surface of the inner liner (22) is chamfered.

4. The motor rotor brake device according to claim 3, characterized in that: The brake assist mechanism comprises a top block (24), an electromagnet gasket (25) and a spring (26); a plurality of groups of slide grooves (23) are provided in the inner shell (22); the electromagnet gasket (25) is fixedly arranged on the bottom wall of the slide groove (23); the top block (24) is electrically connected to a control center; the top block (24) is slidably arranged in the slide groove (23); the spring (26) is fixedly arranged between the bottom wall of the slide groove (23) and the top block (24); and the magnetic poles of the top block (24) and the electromagnet gasket (25) are opposite.

5. The motor rotor brake device according to claim 4, characterized in that: The top block (24) is perpendicular to the upper end surface of the inner container (22), and a groove (27) is provided on the upper side of the screw rod (16). The taper of the upper wall annular surface of the groove (27) is the same as the taper of the slide groove (23).

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