Power-off self-locking linear motor

Abstract

The power-off self-locking linear motor comprises a rotor assembly, a stator assembly and a power-off self-locking mechanism used for locking the rotor assembly during power off, and the power-off self-locking mechanism comprises a locking piece, a locking block and a driving mechanism used for driving the locking block to make contact with the locking piece during power off. According to the utility model, the structure is simple, and the equipment collision condition caused by the movement of the machine table due to inertia phenomenon or human careless touch during power failure can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a linear motor field especially relates to a power-off self-locking linear motor. BACKGROUND

[0002] The optical fiber coupling platform is usually built by the linear motor XYZ, the precision of this platform belongs to the super high precision level, and the equipment mounted on the platform is also usually expensive, such as a camera. The factory may have power failure, once the power failure occurs, the XY axis may slide due to inertia, and then the valuable equipment may be damaged. Therefore, there is an urgent need for a linear motor that can be applied to the optical fiber coupling platform and self-locked during power failure. SUMMARY

[0003] The utility model discloses a linear motor that can be self-locked during power failure.

[0004] To solve the above technical problems, the utility model discloses a kind of power-off self-locking linear motors, including rotor assembly and stator assembly, further include the power-off self-locking mechanism for locking rotor assembly when power failure, power-off self-locking mechanism includes locking piece, locking block and the driving mechanism that drives locking block and locking piece contact when power failure.

[0005] Further, the face of the locking piece corresponding to the locking block is parallel to the movement direction of the rotor assembly, and the length of the face is greater than or equal to the movement stroke of the rotor assembly.

[0006] Further, the locking block is L-shaped.

[0007] Further, the side of the locking block corresponding to the locking piece corresponds to the locking part protruding.

[0008] Further, the driving mechanism includes a cylinder, a spring, and a shaft, the locking block is installed through the shaft, one end of the locking block faces the locking piece, and the cylinder and the spring are correspondingly arranged on both sides of the other end of the locking block.

[0009] Further, the spring applies a spring force to the locking block to separate the locking block and the locking piece; the cylinder is connected to an external air source through a normally closed electromagnetic valve, and drives the locking block to contact the locking piece when power failure.

[0010] Further, the locking piece is arranged on the side of the stator assembly, and the locking block and the driving mechanism are arranged on the side of the rotor assembly.

[0011] Further, the face of the locking piece corresponding to the locking block is a rough surface.

[0012] The utility model has the advantages of simple structure, which can avoid equipment collision caused by machine movement due to inertia or accidental touch during power failure. Attached Figure Description

[0013] Fig. 1 This is a three-dimensional structural diagram of the power-off self-locking linear motor according to an embodiment of the present invention.

[0014] Fig. 2 This is a three-dimensional structural diagram of the power-off self-locking mechanism according to an embodiment of the present utility model.

[0015] Fig. 3 This is a side view of the power-off self-locking mechanism according to an embodiment of the present utility model.

[0016] Fig. 4 This is a partial structural diagram of the power-off self-locking mechanism according to an embodiment of the present utility model.

[0017] Explanation of icon numbers

[0018] Mover assembly 10, stator assembly 20, power-off self-locking mechanism 30, locking plate 31, locking block 32, locking part 33, cylinder 34, elastic element 35, rotating shaft 36, base 37, cylinder rod 38. Detailed Implementation

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this embodiment of the invention, directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] Please refer to Figs. 1-4 The power-off self-locking linear motor of this utility model embodiment includes a mover assembly, a stator assembly, and a power-off self-locking mechanism for locking the mover assembly when power is off.

[0023] The power-off self-locking mechanism includes a locking plate, a locking block, and a driving mechanism that drives the locking block to contact the locking plate when power is off. This invention utilizes the frictional force between the locking plate and the locking block to achieve braking and locking.

[0024] As an implementation, the surface of the locking piece corresponding to the locking block is parallel to the moving direction of the mover assembly, and the length of the surface is greater than or equal to the moving stroke of the mover assembly, so that the mover assembly can be locked when running to any position.

[0025] As an implementation, the locking block is L-shaped. The L-shaped locking block can make the structure of the power-off self-locking mechanism more compact.

[0026] As an implementation, the side of the locking block corresponding to the locking piece is provided with a locking part in a protruding manner. The locking part improves the friction between the locking piece and the locking block, so that the linear motor is locked more quickly when power is off.

[0027] As an implementation, the driving mechanism includes a cylinder, an elastic member, a rotating shaft, and a base. The locking block is installed on the base through the rotating shaft, and one end of the locking block faces the locking piece. The cylinder and the elastic member are correspondingly arranged on both sides of the other end of the locking block. The elastic member and the cylinder rod of the cylinder (the front end of the cylinder rod is in contact with the locking block, and in specific implementation, a pressing head can also be installed on the front end of the cylinder rod, and the cylinder rod pushes the locking block through the pressing head) are in contact with the locking block.

[0028] The elastic member applies an elastic force to the locking block to separate the locking block from the locking piece. The elastic member is preferably a spring, and in specific implementation, a pin can be installed on the spring to apply an elastic force to the locking block. The cylinder is connected to an external air source through a normally closed electromagnetic valve, and drives the locking block to contact the locking piece when power is off. The cylinder is connected to the external air source and connected to compressed air, and the gas on-off is controlled by an electromagnetic valve. In a non-working state (i.e., a non-power-off state), the cylinder is not connected to the compressed air, the cylinder rod is retracted, the locking block is rotated around the rotating shaft under the action of the spring, and the locking piece is separated. In the working state (i.e., the power-off state), the cylinder is connected to the compressed air, the cylinder rod is extended, the locking block is pushed out and then pressed against the locking piece to brake and lock.

[0029] As an implementation, the locking piece is arranged on the stator assembly side, and the locking block and the driving mechanism are arranged on the mover assembly side, i.e., the locking piece is stationary, and the locking block moves with the mover assembly. In specific implementation, the locking piece can also be arranged on the mover assembly side, and the locking block can be arranged on the stator assembly side according to needs.

[0030] As an implementation, the surface of the locking piece corresponding to the locking block is a rough surface, which increases the friction between the locking piece and the locking block to improve the power-off locking effect.

[0031] The utility model can automatically lock the position when power is off, prevent the load from moving, ensure the system safety, avoid the loss of control or damage caused by power failure; the utility model can prevent the load from sliding or moving and reduce the risk of accidents through the self-locking function when power is off or fails; the utility model reduces the dependence on additional mechanical braking devices, simplifies the system structure, and reduces the cost and complexity.

[0032] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A power-off self-locking linear motor, comprising a mover assembly and a stator assembly, characterized in that, It also includes a power-off self-locking mechanism for locking the stop sub-assembly when power is off, the power-off self-locking mechanism including a locking plate, a locking block, and a drive mechanism for driving the locking block to contact the locking plate when power is off; The drive mechanism includes a cylinder, an elastic element, and a rotating shaft. The locking block is mounted via the rotating shaft, with one end of the locking block facing the locking plate. The cylinder and the elastic element are respectively located on both sides of the other end of the locking block. The elastic element applies a spring force to the locking block to separate it from the locking plate; the cylinder is connected to an external air source through a normally closed solenoid valve, and drives the locking block to contact the locking plate when the power is off.

2. The power-off self-locking linear motor as described in claim 1, characterized in that, The surface of the locking plate facing the locking block is parallel to the direction of movement of the moving part assembly, and the length of this surface is greater than or equal to the stroke of the moving part assembly.

3. The power-off self-locking linear motor as described in claim 1, characterized in that, The locking block is L-shaped.

4. The power-off self-locking linear motor as described in claim 1, characterized in that, The locking block has a corresponding locking part protruding on the side facing the locking piece.

5. The power-off self-locking linear motor as described in claim 1, characterized in that, The locking plate is located on the stator assembly side, while the locking block and drive mechanism are located on the mover assembly side.

6. The power-off self-locking linear motor as described in claim 1, characterized in that, The surface of the locking plate facing the locking block is a rough surface.

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