Elastic reset type motor forward and reverse rotation brake device

Abstract

The utility model discloses an elastic reset type motor positive and negative rotation brake device, which relates to the technical field of motor control, and comprises a fixed shell and two brake pads, two limiting plates and two limiting rings are connected in the fixed shell in a sliding manner, two ends of each limiting plate are fixedly connected with the adjacent limiting rings, and the two ends of each limiting plate are fixedly connected with the corresponding brake pad. Two limiting rods are fixedly connected between the inner walls of the limiting ring, penetrate through the brake pad and are in sliding connection with the brake pad; a motor shaft body; according to the brake device, the first electric push rod is started to drive one of the clamping rings to be clamped with the positioning ring, and the clamped spring is replaced by starting the first electric push rod before the motor shaft body brakes, so that the spring is driven to contract to drive the brake pad to clamp and decelerate the motor shaft body, and brake resistance can be provided when the motor slides down in a power failure; when the motor slides down due to insufficient torsion, the motor shaft generates frictional resistance to prevent the motor shaft from rotating reversely.

Description

A flexible reset type motor forward and reverse braking device Technical Field

[0001] This utility model relates to the field of motor control technology, specifically to an elastic reset type motor forward and reverse braking device. Background Technology

[0002] Brushed motor shaft brakes can quickly stop the motor when needed, preventing equipment from going out of control and thus improving equipment safety. For example, in electric vehicles and power tools, the rapid braking function can prevent accidents. The braking function also allows for more precise control of the motor's stopping position. For instance, in applications requiring precise positioning, such as industrial automation equipment and robots, the braking function ensures the motor stops accurately at a designated position.

[0003] Existing brushed motor braking circuits require additional circuitry to achieve the braking function, which increases system complexity and cost. Furthermore, the braking deceleration and anti-reverse functions cannot be separated; braking speed can only be adjusted by changing components in the circuit. This limits the flexibility of the braking system, making it difficult to adapt to different application scenarios and load conditions, and thus inconvenient to use. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible reset type motor forward and reverse rotation braking device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a flexible reset type motor forward and reverse braking device, comprising:

[0006] The device comprises a fixed housing and two brake pads. The fixed housing has two limiting plates and two limiting rings slidably connected inside. Both ends of the limiting plates are fixedly connected to the adjacent limiting rings. The inner walls of the limiting rings are fixedly connected to two limiting rods. The limiting rods pass through the brake pads and are slidably connected to them.

[0007] Motor shaft body.

[0008] Furthermore, the motor shaft body is externally screwed on with fixing screws.

[0009] Furthermore, multiple ball bearings are equidistantly rotatably connected to the outer wall of the limiting rod.

[0010] Furthermore, one of the limiting plates has two fixing blocks fixedly connected to one side, and one end of each fixing block is fixedly connected to a spring. The two springs are symmetrically distributed, and the two brake pads pass through the springs.

[0011] Furthermore, each of the two limiting rings is rotatably connected to a retaining ring on its opposite side, and a one-way bearing is rotatably connected inside the retaining ring. One end of the spring is fixedly connected to a connecting plate, and both connecting plates are fixedly connected to adjacent one-way bearings.

[0012] Furthermore, two positioning rings are fixedly sleeved on the outer wall of the motor shaft body. Multiple slots are equidistantly provided on one side of each positioning ring. Multiple inserts are equidistantly fixed on opposite sides of the two positioning rings. The inserts can be movably engaged with adjacent slots.

[0013] Furthermore, an electric push rod is fixedly connected to the outer wall of the fixed shell, and a docking plate is fixedly sleeved on the output end of the electric push rod. The docking plate penetrates the fixed shell and is fixedly connected to its adjacent limiting ring. A protective plate is fixedly sleeved on the outer wall of the docking plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] When the electric push rod is activated, one of the retaining rings engages with the positioning ring. Before the motor shaft body brakes, the springs that are engaged with the retaining ring are replaced by activating the electric push rod. This causes the springs to contract and drive the brake pads to clamp and decelerate the motor shaft body. This provides braking resistance when the motor slides down when the power is off. When the motor's own torque is insufficient to slide down, the motor shaft generates frictional resistance to prevent the motor shaft from rotating in the opposite direction.

[0016] The electric actuator can switch to another set of retaining rings and positioning rings for engagement, thereby coping with the bidirectional rotation of the motor shaft. It can also decelerate and prevent reverse rotation in both directions, improving the flexibility of the braking system and making it easier to use. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a side sectional view of the limiting rod in this utility model;

[0019] Figure 3 is a schematic diagram of the side section of the limiting ring structure in this utility model;

[0020] Figure 4 is a schematic diagram of the side section structure of the fixed shell in this utility model.

[0021] In the diagram: 10. Fixed shell; 101. Fixed screw; 11. Limiting plate; 111. Fixed block; 112. Limiting ring; 113. Limiting rod; 1131. Ball bearing; 114. Spring; 1141. Connecting plate; 115. Snap ring; 116. Insert block; 117. One-way bearing; 12. Brake pad; 13. Electric push rod one; 131. Connecting plate; 132. Protective plate; 20. Motor shaft body; 201. Positioning ring; 202. Snap groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4. This utility model provides a technical solution: an elastic reset type motor forward and reverse rotation braking device, including a fixed shell 10 and two brake pads 12. The fixed shell 10 has two limiting plates 11 and two limiting rings 112 slidably connected inside. Both ends of the limiting plates 11 are fixedly connected to the adjacent limiting rings 112. Two limiting rods 113 are fixedly connected between the inner walls of the limiting rings 112. The limiting rods 113 pass through the brake pads 12 and are slidably connected to them.

[0024] Motor shaft body 20.

[0025] In practice, starting the electric push rod 13 can drive the limiting ring 112, the limiting plate 11, and the two springs 114 to move through the docking plate 131, so that the insert 116 on one of the retaining rings 115 engages with the adjacent positioning ring 201. When the motor shaft body 20 rotates, since the one-way bearing 117 only allows the motor shaft body 20 to rotate in one direction, when the motor shaft decelerates and reverses, the connecting plate 1141 drives the spring 114 to rotate. The spring 114 quickly contracts, pushing the two brake pads 12 against each other so that the brake pads 12 contact the fixed shell 10 for clamping, thereby preventing the motor shaft body 20 from reversing. Starting the electric push rod 13 can switch another set of retaining rings 115 and positioning rings 201 to engage, thereby dealing with the bidirectional rotation of the motor shaft body 20, and can perform deceleration and anti-reverse functions respectively during the bidirectional rotation of the motor shaft body 20.

[0026] Referring to Figure 1, the motor shaft body 20 is externally screwed with a fixing screw 101.

[0027] In practice, the fixed shell 10 is fixed to the outside of the motor-driven equipment by the fixing screws 101, which facilitates disassembly and debugging.

[0028] Referring to Figure 2, multiple ball bearings 1131 are equidistantly rotatably connected to the outer wall of the limiting rod 113.

[0029] In practice, by setting multiple balls 1131, the friction between the limit rod 113 and the brake pad 12 is reduced, so that when a single spring 114 clamps the two brake pads 12 from one side, it can smoothly drive the two brake pads 12 to move closer to each other, and make the inner wall of the brake pad 12 contact and abut against the motor shaft body 20. Thus, the friction between the brake pad 12 and the fixed shell 10 is used to decelerate the fixed shell 10 in time and prevent reverse rotation.

[0030] Referring to Figure 3, one of the limiting plates 11 has two fixing blocks 111 fixedly connected to one side, and a spring 114 is fixedly connected to one end of the fixing block 111. The two springs 114 are symmetrically distributed, and the two brake pads 12 pass through the springs 114.

[0031] Both limiting rings 112 are rotatably connected to retaining rings 115 on opposite sides. One-way bearings 117 are rotatably connected inside retaining rings 115. One end of spring 114 is fixedly connected to connecting plate 1141. Both connecting plates 1141 are fixedly connected to adjacent one-way bearings 117.

[0032] Two positioning rings 201 are fixedly sleeved on the outer wall of the motor shaft body 20. Multiple slots 202 are equidistantly opened on one side of the positioning rings 201. Multiple inserts 116 are equidistantly fixed on the opposite sides of the two retaining rings 115. The inserts 116 can be movably engaged with the adjacent slots 202.

[0033] An electric push rod 13 is fixedly connected to the outer wall of the fixed shell 10. A docking plate 131 is fixedly sleeved on the output end of the electric push rod 13. The docking plate 131 passes through the fixed shell 10 and is fixedly connected to the adjacent limiting ring 112. A protective plate 132 is fixedly sleeved on the outer wall of the docking plate 131.

[0034] In practice, starting the electric push rod 13 can drive the limiting ring 112, the limiting plate 11, and the two springs 114 to move through the docking plate 131, so that the insert 116 on one of the retaining rings 115 engages with the adjacent positioning ring 201. When the motor shaft body 20 rotates, since the one-way bearing 117 is a one-way bearing 117, the motor shaft body 20 is allowed to rotate in one direction. When the motor shaft decelerates and reverses, the connecting plate 1141 drives the spring 114 to rotate. The spring 114 quickly contracts and pushes the two brake pads 12 against each other, so that the brake pads 12 contact the fixed shell 10 and clamp them, thereby preventing the motor shaft body 20 from reversing. Starting the electric push rod 13 can switch another set of retaining rings 115 and positioning rings 201 to engage, thereby dealing with the bidirectional rotation of the motor shaft body 20.

[0035] Working principle: Starting the electric push rod 13 can drive the limiting ring 112, the limiting plate 11, and the two springs 114 to move through the docking plate 131, so that the insert 116 on one of the retaining rings 115 engages with the adjacent positioning ring 201. When the motor shaft body 20 rotates, since the one-way bearing 117 only allows the motor shaft body 20 to rotate in one direction, when the motor shaft decelerates and reverses, the connecting plate 1141 drives the spring 114 to rotate. The spring 114 quickly contracts, pushing the two brake pads 12 against each other, so that the brake pads 12 contact the fixed shell 10 and clamp them, thereby preventing the motor shaft body 20 from reversing. Starting the electric push rod 13 can switch the other set of retaining rings 115 and positioning rings 201 to engage, thereby dealing with the bidirectional rotation of the motor shaft body 20, and can perform deceleration and anti-reverse functions respectively during the bidirectional rotation of the motor shaft body 20.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A resilient reset type motor forward and reverse braking device, characterized in that, Includes a fixed housing (10) and two brake pads (12). The fixed housing (10) has two limiting plates (11) and two limiting rings (112) slidably connected inside. Both ends of the limiting plates (11) are fixedly connected to the adjacent limiting rings (112). The inner walls of the limiting rings (112) are fixedly connected to two limiting rods (113). The limiting rods (113) pass through the brake pads (12) and are slidably connected to them. Motor shaft body (20).

2. The elastic reset type motor forward and reverse braking device as described in claim 1, characterized in that: The motor shaft body (20) is externally screwed with a fixing screw (101).

3. The elastic reset type motor forward and reverse braking device as described in claim 1, characterized in that: Multiple ball bearings (1131) are equidistantly rotatably connected to the outer wall of the limiting rod (113).

4. The elastic reset type motor forward and reverse braking device as described in claim 1, characterized in that: One of the limiting plates (11) has two fixing blocks (111) fixedly connected to one side. One end of the fixing block (111) is fixedly connected to a spring (114). The two springs (114) are symmetrically distributed, and the two brake pads (12) pass through the springs (114).

5. The elastic reset type motor forward and reverse braking device as described in claim 4, characterized in that: Both of the two limiting rings (112) are rotatably connected to retaining rings (115) on opposite sides. One-way bearings (117) are rotatably connected inside the retaining rings (115). One end of the spring (114) is fixedly connected to a connecting plate (1141). Both connecting plates (1141) are fixedly connected to the adjacent one-way bearings (117).

6. The elastic reset type motor forward and reverse braking device as described in claim 5, characterized in that: Two positioning rings (201) are fixedly sleeved on the outer wall of the motor shaft body (20). Multiple slots (202) are equidistantly provided on one side of the positioning rings (201). Multiple inserts (116) are equidistantly fixed on the opposite sides of the two retaining rings (115). The inserts (116) can be movably engaged with the adjacent slots (202).

7. The elastic reset type motor forward and reverse braking device as described in claim 6, characterized in that: An electric push rod (13) is fixedly connected to the outer wall of the fixed shell (10). A docking plate (131) is fixedly sleeved on the output end of the electric push rod (13). The docking plate (131) penetrates the fixed shell (10) and is fixedly connected to its adjacent limiting ring (112). A protective plate (132) is fixedly sleeved on the outer wall of the docking plate (131).

Images