CN211550342U - Z-axis module self-locking device - Google Patents
Z-axis module self-locking device Download PDFInfo
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- CN211550342U CN211550342U CN201922385607.7U CN201922385607U CN211550342U CN 211550342 U CN211550342 U CN 211550342U CN 201922385607 U CN201922385607 U CN 201922385607U CN 211550342 U CN211550342 U CN 211550342U
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Abstract
The utility model discloses a Z axle module is from locking mechanism. The Z-axis module self-locking device comprises a vertically placed base, a self-locking mechanism and a load moving platform fixed on the self-locking mechanism, wherein the self-locking mechanism comprises a friction plate, a fixed magnet group and a variable magnet group, the friction plate is connected with the base at one side, the fixed magnet group is fixed at the other side of the friction plate, the variable magnet group is movably connected with the fixed magnet group, and the load moving platform is fixed on the variable magnet group. The utility model discloses Z axle module self-lock device is when load moving platform cuts off the power supply suddenly, and the fixed magnet group becomes the same with the magnetic pole of becoming the magnet group opposite face by the dissimilarity under the on-state, leads to increasing the extrusion force between fixed magnet group and friction plate to make the static friction between fixed magnet group and the friction plate reach the balance with load moving platform's gravity, can stop motion when making load moving platform lose drive power, in order to avoid crashing the board.
Description
Technical Field
The utility model relates to a linear electric motor drive arrangement field especially relates to Z axle module self-locking device.
Background
In the linear electric motor field, in order to prevent that moving platform Z axle module from dropping perpendicularly when the outage, the scheme that adopts among the prior art has following two kinds:
1. as shown in fig. 6, the equal weight scheme is adopted: the movable platform and the weight blocks are connected through pulleys to overcome the vertical downward force of the movable platform. The disadvantages are that: a. occupying space; b. if the power is suddenly cut off, the linear motor stops firstly, then moves upwards under the action of gravity of the equal-weight block and returns to the initial position, and the linear motor cannot be guaranteed to stay at the position at the moment of power failure; c. if the load changes, the weight is changed accordingly.
2. As shown in fig. 7, a trapezoidal screw rod with brake motor combination scheme is adopted: after the power failure, the screw rod cannot rotate under the fixation of the motor with the brake, and the load moving platform stops and is fixed at the stop position by utilizing the self-locking property of the trapezoidal screw rod. The disadvantages are that: a. influence on accuracy; b. because the scheme is mainly driven by the linear motor, the motor with the brake of the screw rod only plays the roles of driven and power-off locking, if the movement speed is overlarge, the motor with the brake can not follow the rhythm of the linear motor easily, and the motor with the brake is easy to damage; c. the speeds of the motor with the brake and the linear motor are not well coordinated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at preventing to cut off the power supply suddenly and lead to load moving platform to run down under the effect of gravity and hit the board and provide Z axle module self-locking device, this Z axle module self-locking device can guarantee when the power supply that load moving platform stops the position of locating when the power supply.
The technical scheme of the utility model as follows:
the Z-axis module self-locking device comprises a base, a self-locking device and a load moving platform fixed on the self-locking device, wherein the self-locking mechanism comprises a friction plate, a fixed magnet group and a variable magnet group, one side of the friction plate is connected with the base, the fixed magnet group is fixed on the other side of the friction plate, the variable magnet group is movably connected with the fixed magnet group, and the load moving platform is fixed on the variable magnet group.
And a guide post for guiding is arranged on one surface of the variable magnet group opposite to the fixed magnet group.
The fixed magnet group is provided with a groove for accommodating the guide post.
In the power-off state, the opposite magnetic poles of the fixed magnet group and the variable magnet group are the same, the gravity and the static friction force of the load moving platform keep balance, and the load moving platform keeps a static state.
In the electrified state, the opposite magnetic poles of the fixed magnet group and the variable magnet group are different, the driving force for driving the load moving platform is greater than the sliding friction force, and the load moving platform can move back and forth along the Z axis under the driving of the linear motor.
The utility model has the advantages that: the utility model discloses Z axle module self-lock device is when load moving platform cuts off the power supply suddenly, and the fixed magnet group becomes the same with the magnetic pole of becoming the magnet group opposite face by the dissimilarity under the on-state, leads to increasing the extrusion force between fixed magnet group and friction plate to make the static friction between fixed magnet group and the friction plate reach the balance with load moving platform's gravity, can stop motion when making load moving platform lose drive power, in order to avoid crashing the board.
Drawings
FIG. 1 is a side view of the Z-axis module self-locking device of the present invention;
fig. 2 is an exploded view of the Z-axis module self-locking device of the present invention;
fig. 3 is a perspective view of the self-locking mechanism of the Z-axis module self-locking device of the present invention;
fig. 4 is a schematic view of the self-locking mechanism of the Z-axis module self-locking device of the present invention in a power-off state;
fig. 5 is a schematic view of the self-locking mechanism of the Z-axis module self-locking device of the present invention in a power-on state;
FIG. 6 is a schematic structural diagram of an equal-weight scheme adopted in the background art;
fig. 7 is a schematic view of a combination scheme of a trapezoidal screw rod with a brake motor in the background art.
In the figure: 1-self-locking mechanism, 11-friction plate, 12-fixed magnet group, 121-groove, 122-guide column, 13-variable magnet group, 2-base and 3-load moving platform.
Detailed Description
For better illustration of the present invention, the following description will be made with reference to the accompanying drawings.
As shown in fig. 1 to 3, the Z-axis module self-locking device includes a base 2, a self-locking mechanism 1, and a load moving platform 3 fixed on the self-locking mechanism 1, the self-locking mechanism 1 includes a friction plate 11 having one side connected to the base 2, a fixed magnet group 12 fixed on the other side of the friction plate 11, and a variable magnet group 13 movably connected to the fixed magnet group 12, and the load moving platform 3 is fixed on the variable magnet group 13. Preferably, a guide post 131 for guiding is provided on a surface of the variable magnet group 13 facing the fixed magnet group 12. The fixed magnet assembly 12 is hollowed with a groove 121 for accommodating the guide post 131, and the fixed magnet assembly 12 can move along the guide post 131. The load moving platform 3 is fixed with a load. The load moving platform 3 is driven by a motor to move back and forth in the Z-axis direction.
Specifically, as shown in fig. 4, in the power-off state, the opposite magnetic poles of the fixed magnet group 12 and the variable magnet group 13 are the same, in this embodiment, the magnetic poles of the opposite faces of the fixed magnet group 12 and the variable magnet group 13 are both S poles, the variable magnet group 13 applies an extrusion force to the fixed magnet group 12, so that the gravity of the load moving platform 3 and the static friction force between the variable magnet group 12 and the friction plate 11 keep balance,the loaded moving platform 3 remains stationary. By the formulaWherein
In order to obtain a coefficient of static friction,
is the repulsive force between the fixed magnet and the variable magnet group. To change the maximum static friction force, the repulsive force between the variable magnet group 13 and the fixed magnet group 12 can be changed
Or changing the coefficient of static friction
. Therefore, the self-locking mechanism 1 with different repulsive forces or the friction plate 11 with different materials can be selected according to the weight of the load; coefficient of static friction
The material of the friction plate 11 and the material of the contact surface of the fixed magnet group 12; repulsive force
The magnitude is related to the current.
Specifically, as shown in fig. 5, in the energized state, the opposite magnetic poles of the fixed magnet group 12 and the variable magnet group 13 are different, in this embodiment, the magnetic pole of the opposite surface of the variable magnet group 13 and the fixed magnet group 12 is changed from S to N, the repulsive force between the variable magnet group 13 and the fixed magnet group 12 is reduced, and the driving force of the motor to the load moving platform 13 is greater than the sliding friction force, so that the self-locking mechanism 1 can move back and forth along the Z axis under the driving of the motor.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modification, equivalent replacement or improvement made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims (5)
- The Z-axis module self-locking device is characterized in that: the self-locking mechanism comprises a friction plate, a fixed magnet group and a variable magnet group, wherein one side of the friction plate is connected with the base, the fixed magnet group is fixed on the other side of the friction plate, the variable magnet group is movably connected with the fixed magnet group, and the load moving platform is fixed on the variable magnet group.
- 2. The Z-axis module self-locking device according to claim 1, wherein: and a guide post for guiding is arranged on one surface of the variable magnet group opposite to the fixed magnet group.
- 3. The Z-axis module self-locking device according to claim 2, wherein: and a groove for accommodating the guide post is dug on the fixed magnet group.
- 4. The Z-axis module self-locking device according to any one of claims 1 to 3, wherein: in the power-off state, the magnetic poles of the opposite surfaces of the fixed magnet group and the variable magnet group are the same, the gravity and the static friction force of the load moving platform keep balance, and the load moving platform keeps a static state.
- 5. The Z-axis module self-locking device according to any one of claims 1 to 3, wherein: in the power-on state, the magnetic poles of the opposite surfaces of the fixed magnet group and the variable magnet group are different, the driving force for driving the load moving platform is larger than the sliding friction force, and the load moving platform can move back and forth along the Z axis under the driving of the linear motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385607.7U CN211550342U (en) | 2019-12-26 | 2019-12-26 | Z-axis module self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922385607.7U CN211550342U (en) | 2019-12-26 | 2019-12-26 | Z-axis module self-locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550342U true CN211550342U (en) | 2020-09-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922385607.7U Active CN211550342U (en) | 2019-12-26 | 2019-12-26 | Z-axis module self-locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211550342U (en) |
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2019
- 2019-12-26 CN CN201922385607.7U patent/CN211550342U/en active Active
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