Anti-reversion stepping shaft locking device
By designing an anti-reversal step shaft locking device, the synergistic effect of ratchet and locking assembly is used to solve the energy consumption and safety hazards of stepper motors in a stationary state, and the bidirectional locking and safety improvement of the motor shaft is achieved.
Patent Information
- Application Number
- CN202422474432.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The existing stepper motors need to continuously supply power and lock themselves when they are stationary, resulting in energy consumption and heating. The brake device cannot effectively prevent reversal when the power is suddenly outage, which poses safety hazards.
An anti-reversal stepping shaft locking device is designed. Through the coordination of the first and second ratchets and the locking assembly, the synergistic action of the guide rail, the electric screw and the sliding block is used to realize the bidirectional locking of the motor shaft to avoid additional energy consumption and reversal.
It effectively locks the two-way rotation of the motor shaft without consuming additional energy, reduces safety risks and avoids reversal caused by the weight of heavy objects.
Smart Images
Figure CN223194544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of anti-reversal of a stepping shaft, in particular to an anti-reversal locking device for a stepping shaft. Background Art
[0002] A stepper shaft is a drive shaft used in automation equipment or precision machinery, typically used in conjunction with a stepper motor. A stepper motor is a motor that converts electrical pulse signals into angular or linear displacement, enabling precise positioning and speed control under digital control.
[0003] Existing stepper motor self-locking typically works by applying a holding current to the windings when the stepper motor is stationary. The magnetic field generated by the motor windings maintains the rotor in its current position, generating a holding torque. While this method can achieve motor shaft self-locking, it requires continuous power to the windings, which results in additional energy consumption. Furthermore, the continuous current in the motor windings causes the motor to heat up. Maintaining a high current for extended periods can cause the motor to overheat, affecting its lifespan and reliability. Another approach involves adding a brake to the motor shaft. For example, when the motor is used to lift heavy objects, due to their weight, if a sudden power failure or the motor is stopped midway during lifting, the friction between the brake shoe and the brake wheel alone is insufficient to prevent the shaft from reversing. The weight of the heavy object itself can drive the motor in reverse, posing a safety hazard.
[0004] In view of the above problems, it is necessary to design an anti-reverse stepping shaft locking device. Utility Model Content
[0005] In order to overcome the disadvantage that if the damaged ratchet is not replaced in time, the damaged ratchet may affect the overall performance of the equipment, the utility model provides an anti-reverse stepping shaft locking device.
[0006] The technical solution of the utility model is: an anti-reverse stepper shaft locking device, including a stepper motor and a motor shaft, the motor shaft is arranged on the right side of the stepper motor, and also includes a shell, a first ratchet, a second ratchet and a locking assembly. The shell is arranged on the right side of the stepper motor, the motor shaft passes through the middle of the shell, and the first ratchet and the second ratchet are arranged on the motor shaft. The ratchet directions of the first ratchet and the second ratchet are opposite, and the second ratchet is located on the left side of the first ratchet. A locking assembly is arranged inside the shell, and the locking assembly cooperates with the first ratchet and the second ratchet to lock the motor shaft.
[0007] Furthermore, the locking assembly includes a guide rail, an electric screw, a sliding block, a card plate, a card block and a spring. A guide rail is provided on the front side of the shell, and an electric screw is rotatably connected to the shell. The electric screw is located inside the guide rail and passes through the shell. A sliding block is threaded on the electric screw, and the sliding block slides with the guide rail. A guide rod is symmetrically provided on the rear side of the sliding block, and a card plate is slidably connected between the two guide rods. A card block for preventing reversal of the motor shaft is connected to the card plate, and a spring is connected between the card plate and the sliding block.
[0008] Furthermore, a rubber pad is included. The rear ends of the two guide rods are provided with an annular rubber pad, and the two rubber pads are both in contact with the card plate.
[0009] Furthermore, a plurality of ventilation holes are evenly distributed on the shell.
[0010] Furthermore, a knob is included, and a knob is provided at the right end of the electric screw.
[0011] Furthermore, it also includes a limit block, and the left end of the electric screw is provided with a limit block.
[0012] The beneficial effects of the utility model are as follows: through the coordinated cooperation of the guide rail, the electric screw and the sliding block, when the first ratchet is damaged, the staff turns the knob to drive the electric screw to rotate, the electric screw drives the sliding block to move along the guide rail, and the sliding block drives all the components on it to move until the blocking block moves to the ratchet teeth of the second ratchet, and then the knob is no longer turned, so that the motor shaft can continue to operate normally. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0014] Figure 2 This is an exploded view of the stepper motor, motor shaft and housing of the utility model.
[0015] Figure 3 It is a three-dimensional structural diagram of components such as the motor shaft, the first ratchet, and the second ratchet of the present invention.
[0016] Figure 4 It is a three-dimensional structural diagram of the electric screw rod, sliding block, clamping plate and other components of the utility model.
[0017] Figure numbers: 1_stepping motor, 2_motor shaft, 3_housing, 4_ventilation hole, 5_first ratchet, 6_second ratchet, 7_guide rail, 8_electric screw, 9_sliding block, 10_card plate, 11_card block, 12_spring, 13_rubber pad, 14_knob, 15_limit block. DETAILED DESCRIPTION
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] An anti-reverse stepping shaft locking device, such as Figure 1-Figure 4 As shown, it includes a stepper motor 1, a motor shaft 2, a housing 3, a first ratchet 5, a second ratchet 6 and a locking assembly. The motor shaft 2 is provided on the right side of the stepper motor 1. The housing 3 is provided on the right side of the stepper motor 1. The motor shaft 2 passes through the middle of the housing 3. The first ratchet 5 and the second ratchet 6 are provided on the motor shaft 2. The ratchet directions of the first ratchet 5 and the second ratchet 6 are opposite. The second ratchet 6 is located on the left side of the first ratchet 5. A locking assembly is provided inside the housing 3. The locking assembly cooperates with the first ratchet 5 and the second ratchet 6 to lock the motor shaft 2; The stop assembly includes a guide rail 7, an electric screw rod 8, a sliding block 9, a card plate 10, a card block 11, a spring 12, a rubber pad 13, a knob 14 and a limit block 15. A guide rail 7 is provided on the front side of the housing 3. When the sliding block 9 is in a moving state, the sliding block 9 can move linearly along the guide rail 7 to prevent the sliding block 9 from moving at will. An electric screw rod 8 is rotatably connected to the housing 3. The electric screw rod 8 is located inside the guide rail 7 and passes through the housing 3. When the electric screw rod 8 rotates, it can drive the sliding block 9 to move. The electric screw rod 8 is screwed The rod is provided with a sliding block 9, which slides with the guide rail 7. A guide rod is symmetrically provided on the upper and lower sides of the sliding block 9. A card plate 10 is slidably connected between the two guide rods. A card block 11 for preventing the motor shaft 2 from reversing is connected to the card plate 10. A spring 12 is connected between the card plate 10 and the sliding block 9. The spring 12 is a compression spring. When the first ratchet 5 and the second ratchet 6 are reversed respectively, the spring 12 resets the card block 11 so that the card block 11 rests on the ratchet teeth of the first ratchet 5 or the ratchet teeth of the second ratchet 6. The two guide rods are connected with a card plate 10. The rear ends are both provided with annular rubber pads 13, and the two rubber pads 13 are both in contact with the card plate 10. When the card plate 10 is in a moving state, the rubber pads 13 can absorb the noise generated by the card plate 10. A knob 14 is provided at the right end of the electric screw rod 8. When the power is off, the knob 14 can be rotated to drive the electric screw rod 8 to rotate, thereby making the sliding block 9 in a moving state. A limit block 15 is provided at the left end of the electric screw rod 8. When the sliding block 9 is in a moving state, the limit block 15 can limit the sliding block 9 to prevent the sliding block 9 from falling off.
[0020] When the stepper motor 1 is in operation, the motor shaft 2 is driven to rotate clockwise, and the motor shaft 2 drives the first ratchet wheel 5 to rotate and the second ratchet wheel 6 to rotate. During the clockwise rotation of the first ratchet wheel 5, the tooth back of the first ratchet wheel 5 presses the card block 11, so that the card block 11 drives the card plate 10 to move along the guide rod in the direction of the guide rail 7, the spring 12 is compressed, and the card block 11 slides behind the teeth of the first ratchet wheel 5, and drives the card plate 10 and the card block 11 to move in the direction of the first ratchet wheel 5 under the action of the spring 12. In this way, the first ratchet wheel 5 continues to rotate, and the card block 11 will not prevent the first ratchet wheel 5 from rotating clockwise. When the stepper motor 1 stops, the card block 11 is stuck between the two ratchet teeth corresponding to the first ratchet wheel 5, preventing the first ratchet wheel 5 from rotating counterclockwise. If the stepper motor 1 needs to rotate counterclockwise, the electric screw rod 8 is started to rotate, and the electric screw rod 8 drives the sliding block 9 to perform linear motion along the guide rail 7. The sliding block 9 moves and drives the components on it to move until the card block 11 moves between the two ratchet teeth corresponding to the second ratchet wheel 6. At this time, the working When the second ratchet wheel 6 is in the clockwise direction, the block 11 is stuck between the two ratchet teeth corresponding to the first ratchet wheel 5, preventing the second ratchet wheel 6 from rotating clockwise. In this way, the motor shaft 2 can be locked in both rotation directions according to the situation, and the locking effect is good. Not only will it not cause additional energy consumption, but the use of this locking device can also prevent the heavy object from driving the motor to reverse direction by its own gravity during lifting operations, thereby effectively reducing safety risks.
[0021] When the power is off and the motor shaft 2 needs to be locked, the knob 14 can be rotated to drive the screw rod of the electric screw rod 8 to rotate, thereby adjusting the position of the sliding block 9 on the guide rail 7.
[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.
Claims
1. An anti-reverse stepper shaft locking device, comprising a stepper motor (1) and a motor shaft (2), wherein the motor shaft (2) is provided on the right side of the stepper motor (1), and is characterized in that: The invention also includes a housing (3), a first ratchet (5), a second ratchet (6) and a locking assembly. The housing (3) is provided on the right side of the stepping motor (1). The motor shaft (2) passes through the middle of the housing (3). The first ratchet (5) and the second ratchet (6) are provided on the motor shaft (2). The ratchet teeth of the first ratchet (5) and the second ratchet (6) are in opposite directions. The second ratchet (6) is located on the left side of the first ratchet (5). A locking assembly is provided inside the housing (3). The locking assembly cooperates with the first ratchet (5) and the second ratchet (6) to lock the motor shaft (2).
2. The anti-reverse stepping shaft locking device according to claim 1, characterized in that: The locking assembly comprises a guide rail (7), an electric screw rod (8), a sliding block (9), a card plate (10), a card block (11) and a spring (12). The guide rail (7) is arranged on the front side of the housing (3). The housing (3) is rotatably connected with the electric screw rod (8). The electric screw rod (8) is located inside the guide rail (7). The electric screw rod (8) passes through the housing (3). The electric screw rod (8) is threadedly provided with a sliding block (9). The sliding block (9) and the guide rail (7) are slidably matched. A guide rod is symmetrically arranged on the rear side of the sliding block (9). A card plate (10) is slidably connected between the two guide rods. The card plate (10) is connected with a card block (11) for preventing the motor shaft (2) from reversing. A spring (12) is connected between the card plate (10) and the sliding block (9).
3. The anti-reverse stepping shaft locking device according to claim 2, characterized in that: It also includes a rubber pad (13). The rear ends of the two guide rods are both provided with an annular rubber pad (13), and the two rubber pads (13) are both fitted with the clamping plate (10).
4. The anti-reverse stepping shaft locking device according to claim 3, characterized in that: A plurality of ventilation holes (4) are evenly distributed on the shell (3).
5. The anti-reverse stepping shaft locking device according to claim 4, characterized in that: It also includes a knob (14), and the right end of the electric screw rod (8) is provided with the knob (14).
6. The anti-reverse stepping shaft locking device according to claim 5, characterized in that: It also includes a limiting block (15), and the left end of the electric screw rod (8) is provided with the limiting block (15).