CN212056041U - Overload protection mechanism of multi-rotation electric actuating mechanism for small space - Google Patents
Overload protection mechanism of multi-rotation electric actuating mechanism for small space Download PDFInfo
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- CN212056041U CN212056041U CN201922248360.4U CN201922248360U CN212056041U CN 212056041 U CN212056041 U CN 212056041U CN 201922248360 U CN201922248360 U CN 201922248360U CN 212056041 U CN212056041 U CN 212056041U
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- electric actuator
- protection mechanism
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Abstract
The utility model discloses a little space is with many gyration electric actuator's overload protection mechanism, including the box, worm-gear shaft, worm wheel and worm and be fixed in the inboard signal receiver of box, the worm-gear shaft is fixed in the box through the bearing of fixing respectively at worm-gear shaft both ends, and the worm wheel is fixed at the middle part of worm-gear shaft, the worm wheel with the worm cooperation, the one end of worm is passed through the bearing and is fixed in one side of box, and the other end passes through the fixed box opposite side of bearing and is equipped with the gear at the tip, is used for transmitting power and is that the worm drives the worm wheel and rotates, be equipped with worm complex belleville spring at the bearing inboard at worm both ends, and be equipped with cyclic annular arch at the worm, cyclic. The beneficial effects are that: when the overload happens, the signal receiver sends a signal to cut off the power of the actuating mechanism and stop working, so that the worm and gear are prevented from being damaged due to the overload, and meanwhile, the opening and closing of the valve are stopped in time, and the occurrence of accidents is prevented.
Description
Technical Field
The utility model belongs to the technical field of the automatic electric actuator who opens the valve, especially, relate to be applied to the little space with many gyration electric actuator's of little space overload protection mechanism.
Background
Electric actuators are devices used to drive valves to fully open or fully closed positions, and actuators that can be used to control valves can be used to precisely move the valve to any position.
More and more factories adopt automatic control, manual operation is replaced by mechanical or automatic equipment, and the situation that a miniaturized electric actuator needs to be hung due to insufficient space often occurs in the installation and arrangement area of the equipment, however, the mainstream multi-turn electric actuator in the market is overlarge in volume and overlarge in volume due to the following factors:
1. the multi-rotation actuating mechanism is a bevel gear set or a planetary gear set, and under the condition that the multi-rotation actuating mechanism meets the specified transmission ratio, the volume of the actuating mechanism can be made large;
2. the overload prevention adopts a clutch mode and is added on one side of the actuating mechanism, so that the volume of the actuating mechanism is further increased;
in addition, the traditional overload protection adopting a worm gear and a worm as an actuating mechanism also adopts a clutch mode, and the clutch fixes the worm and pushes the worm gear away from the worm; for a multi-rotation electric actuator, when a worm gear and a worm are used as the actuator, the worm gear serving as a part connected with a valve can only rotate and cannot slide out of the worm in cooperation, so that the overload protection cannot be applied to the small-space multi-rotation electric actuator.
In summary, there is a need for an overload protection mechanism of a multi-turn electric actuator for a small space to realize an overload protection function of the electric actuator during overload.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides an overload protection mechanism of a multi-turn electric actuating mechanism for a small space.
The utility model discloses the concrete technical scheme who adopts does:
the utility model provides an overload protection mechanism of many gyration electric actuator for little space, includes the box, worm-gear shaft, worm wheel and worm and be fixed in the inboard signal receiver of box, the worm-gear shaft is fixed in the box through the bearing of fixing respectively at worm-gear shaft both ends, the worm wheel is fixed in the middle part of worm-gear shaft, the worm wheel with the worm cooperation, the one end of worm is fixed in one side of box through the bearing, and the other end passes through the fixed box opposite side of bearing and is equipped with the gear at the tip, and it is the worm that drives the worm wheel rotation to be used for transmitting power, the bearing inboard at worm both ends is equipped with the belleville spring with worm complex, and is equipped with annular bulge at the worm, and annular bulge's one side is equipped with the signal transmission:
when overload occurs, the worm wheel stops rotating due to overload, the worm continues to rotate under the action of power transmitted from the gear, the worm axially moves due to the fact that the worm wheel does not rotate, at the moment, the annular bulge on the worm moves along the axial direction of the worm along with the worm, a signal transmission device matched with the bulge acts, a moving signal of the worm is transmitted to the signal receiver, the signal receiver sends the signal to the control part to power off the electric actuating mechanism, the signal receiver can also be directly connected with the power switch, and when the axial moving signal of the worm is received, power off is immediately executed, and the electric actuating mechanism stops working; in addition, belleville spring's setting is in order to guarantee when not taking place the overload, the axial displacement does not take place for the worm under belleville spring's effect, the axial displacement just can take place for the worm when only overload force surpasses belleville spring's preset power, belleville spring here, only can be replaced by other can provide preset power and can take place to remove when surpassing preset power in the aspect of the function, like the pressure spring, the pneumatic cylinder, however only belleville spring structural style can satisfy and provide the preset power that satisfies the requirement in the little space from the aspect of electric actuator's little volume, and can guarantee that the worm takes place to remove when surpassing preset power.
As a further improvement, the annular protrusion is a tooth-shaped structure, the signal transmission device is with tooth-shaped structure complex tooth-shaped swing rod, signal receiver is travel switch, the tooth-shaped swing rod is used for transmitting the axial displacement distance signal of worm for travel switch, adopts this kind of design: the mode belongs to mechanical signal transmission, has extremely low requirement on a control part, cannot be influenced by factors such as insensitivity of a control part, faults of the control part and the like, has high reliability, and can be used in working conditions with high safety factor requirements.
As the utility model discloses a further improvement again, cyclic annular arch is the rectangle structure, for laser range finder, adopts such design: when the worm axially moves, the bulge of the rectangular structure also axially moves along with the worm, and at the moment, laser of the laser range finder can be emitted to the highest point and the lowest point of the rectangular structure, so that distance difference is generated, when the worm axially moves, the laser range finder sends a distance difference signal to the control part, and the control part cuts off the power of the electric actuating mechanism, so that overload protection is realized.
As a further improvement of the present invention, the annular protrusion is a rectangular structure, and the signal receiver is a photoelectric sensor and is matched with the rectangular structure, with such a design: when the worm axially moves, the bulge of the rectangular structure also axially moves along with the worm, and at the moment, light of the photoelectric sensor can be emitted to the highest point and the lowest point of the rectangular structure, so that electric signals are generated, when the worm axially moves, the photoelectric sensor sends the signals to the control part, and the control part cuts off the power of the electric actuating mechanism, so that overload protection is realized.
As another improvement of the utility model, the one end of worm is equipped with cyclic annular arch, the utility model discloses an cyclic annular arch can all set up at the worm wheel both ends, has two sets of devices that detect the worm and take place axial displacement like this, can increase the reliability that detects, adopts of course that one end is equipped with cyclic annular arch and also can realize detecting the function that the worm takes place axial displacement, can also save the cost simultaneously, and the preferred one end of this scheme is equipped with cyclic annular arch.
As a further improvement of the present invention, the disk spring is assembled by using a combination method, and the fatigue life of the disk spring is considered, so that the disk spring is assembled, and the disk spring is more favorable to the stress of the disk spring, and therefore, the disk spring is assembled by using the combination method in the aspect of the service life of the disk spring.
As a further improvement of the utility model, the worm both ends are equipped with 6 belleville springs respectively, and the quantity of the reed of used belleville spring is minimize during the stack combination because superimposed reed is more, and elastic friction loss is big more, and the reed plane is out of shape big more, provides under the prerequisite of sufficient default power in needs, selects to use 6 belleville springs.
The utility model has the advantages that: when the overload happens, the signal receiver sends a signal to cut off the power of the actuating mechanism and stop working, so that the worm and gear are prevented from being damaged due to the overload, and meanwhile, the opening and closing of the valve are stopped in time, and the occurrence of accidents is prevented.
Drawings
FIG. 1 is an isometric view of an overload protection mechanism for a multi-turn electric actuator for small spaces in accordance with the present invention;
fig. 2 is a front view of the small-space multi-turn electric actuator to which the overload protection mechanism of the small-space multi-turn electric actuator of the present invention is applied;
fig. 3 is a sectional view a-a in a front view of the small-space multi-turn electric actuator to which the overload protecting mechanism of the small-space multi-turn electric actuator shown in fig. 2 is applied;
FIG. 4 is a sectional view taken along line B-B of a front view of the small-space multi-turn electric actuator to which the overload protecting mechanism of the small-space multi-turn electric actuator shown in FIG. 2 is applied;
FIG. 5 is a schematic structural view of a second embodiment of the overload protection mechanism for the multi-turn electric actuator for small spaces shown in FIG. 4;
FIG. 6 is a schematic structural view of a third embodiment of the overload protection mechanism for the small space multi-turn electric actuator shown in FIG. 4;
illustration of the drawings: the device comprises a worm wheel 1, a bearing 2, a disc spring 3, a worm 4, an annular bulge 5, a gear 6, a worm wheel shaft 7, a box body 8, a signal transmission device 9, a travel switch 10, a laser range finder 11 and a photoelectric sensor 12.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
the specific embodiment is as follows:
in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The first embodiment is as follows:
an overload protection mechanism of a multi-turn electric actuator for small space is provided, wherein a motor is arranged on the left side of a box body 8, an output shaft of the motor is positioned below the box body, a gear set is arranged at the output shaft end of the motor, the gear set is matched with a gear 6, the gear 6 is arranged at the lower end of a worm 4, the worm 4 is fixed in the box body through bearings 2 fixed at the two end parts of the worm 4, disc springs 3 exerting pre-pressure are respectively arranged on the inner sides of the bearings at the two end parts of the worm 4 in a matching way, each group of 6 disc springs are arranged in a matching combination way, namely, the large openings are oppositely butted, a thread part matched with a worm wheel 1 is finally arranged on the worm 4, the worm wheel 1 is fixed in the middle part of the box body 8 through a worm wheel shaft 7, the worm wheel 1 is connected with the worm wheel shaft 7 through a flat key, an, the signal transmission device 9 is a tooth-shaped swing rod, a tooth-shaped part is arranged at the lower end of the tooth-shaped swing rod, the middle part of the tooth-shaped swing rod is movably connected to the box body through a pin shaft and can swing around the pin shaft, the upper part of the tooth-shaped swing rod is connected with the signal receiver 10, and the signal receiver 10 is a travel switch.
When in specific use:
when overload occurs, the worm wheel 1 stops rotating due to overload, the worm 4 continues rotating under the action of power transmitted from the gear 6, the worm 4 axially moves due to the fact that the worm wheel 1 does not rotate, at the moment, the annular bulge 5 on the worm 4 moves along the axial direction of the worm 4 along with the worm 4, the lower end of a tooth-shaped oscillating bar of a transmission device 9 matched with the annular bulge 5 is caused to swing, the upper end of the tooth-shaped oscillating bar of the transmission device 9 swings in the opposite direction, a stroke switch of a signal receiver 10 is triggered, a moving signal generated by the worm 4 is transmitted to the signal receiver 10, the signal receiver 10 sends a signal to a control part to cut off the power of the electric actuating mechanism, the signal receiver can also be directly connected with a power switch, and when the axial moving signal of the worm is received, the power is immediately cut off, and.
Example two:
an overload protection mechanism of a multi-turn electric actuating mechanism for small space is characterized in that a motor is arranged on the left side of a box body 8, an output shaft of the motor is positioned below the box body, a gear set is arranged at the output shaft end of the motor, the gear set is matched with a gear 6, the gear 6 is arranged at the lower end of a worm 4, the worm 4 is fixed in the box body through bearings 2 fixed at the two end parts of the worm 4, disc springs 3 applying pre-pressure are respectively arranged on the inner sides of the bearings at the two end parts of the worm 4 in a matching way, 6 disc springs are arranged in each group, namely, the large-opening opposite butt joint mode is installed, the worm 4 is provided with a thread part matched with the worm wheel 1, the worm wheel 1 is fixed at the middle part of the box body 8 through a worm wheel shaft 7, the worm wheel 1 and the worm wheel shaft 7 are connected together through a flat key, an annular bulge 5 at one end is arranged between the threaded part and the disc spring at the lower end, and a laser range finder 11 is matched on the annular bulge 5.
When in specific use:
when overload occurs, the worm wheel 1 stops rotating due to overload, the worm 4 continues rotating under the action of power transmitted from the gear 6, the worm 4 axially moves due to the fact that the worm wheel 1 does not rotate, the annular bulge 5 on the worm 4 moves along the axial direction of the worm 4 along with the worm 4, laser of the laser range finder 11 can be emitted to the highest point and the lowest point of the rectangular structure, and therefore distance difference is generated, and the laser range finder 11 can only generate signals and needs to send the signals to the control part to cut off the power of the electric actuator, and the electric actuator stops working.
Example three:
an overload protection mechanism of a multi-turn electric actuating mechanism for small space is characterized in that a motor is arranged on the left side of a box body 8, an output shaft of the motor is positioned below the box body, a gear set is arranged at the output shaft end of the motor, the gear set is matched with a gear 6, the gear 6 is arranged at the lower end of a worm 4, the worm 4 is fixed in the box body through bearings 2 fixed at the two end parts of the worm 4, disc springs 3 applying pre-pressure are respectively arranged on the inner sides of the bearings at the two end parts of the worm 4 in a matching way, 4 disc springs are arranged in each group, namely, the large-opening opposite butt joint mode is installed, the worm 4 is provided with a thread part matched with the worm wheel 1, the worm wheel 1 is fixed at the middle part of the box body 8 through a worm wheel shaft 7, the worm wheel 1 and the worm wheel shaft 7 are connected together through a flat key, an annular bulge 5 at one end is arranged between the threaded part and the disc spring at the lower end, and a photoelectric sensor 12 is matched on the annular bulge 5.
When in specific use:
when overload occurs, the worm wheel 1 stops rotating due to overload, the worm 4 continues rotating under the action of power transmitted from the gear 6, the worm 4 axially moves due to the fact that the worm wheel 1 does not rotate, the annular bulge 5 on the worm 4 moves along the axial direction of the worm 4 along with the worm 4, light of the photoelectric sensor 12 can be emitted to the highest point and the lowest point of the rectangular structure, a distance difference is generated to generate an electric signal, and the photoelectric sensor 12 can only generate a signal and needs to send the signal to the control part to cut off the power of the electric actuator, so that the electric actuator stops working.
The above embodiments have explained the present invention in detail. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions, reductions, and substitutions made by the person skilled in the art within the spirit of the present invention also belong to the protection scope of the present invention.
Claims (7)
1. The overload protection mechanism is characterized in that disc springs matched with the worm are arranged on the inner sides of the bearings at the two ends of the worm, the worm is provided with annular bulges, and a signal transmission device connected with the signal receiver is arranged on one side of each annular bulge.
2. The overload protection mechanism for a multi-turn electric actuator used in a small space according to claim 1, wherein the annular protrusion has a tooth-shaped structure, the signal transmission device is a tooth-shaped swing link engaged with the tooth-shaped structure, the signal receiver is a travel switch, and the tooth-shaped swing link is used for transmitting an axial movement distance signal of the worm to the travel switch.
3. The overload protection mechanism for a multi-turn electric actuator used in a small space as claimed in claim 1, wherein the annular protrusion has a rectangular structure and is a laser range finder.
4. The overload protection mechanism for a multi-turn electric actuator used in a small space as claimed in claim 1, wherein the annular protrusion has a rectangular structure, and the signal receiver is a photoelectric sensor and is matched with the rectangular structure.
5. The overload protection mechanism for the multi-turn electric actuator used in a small space according to any one of claims 1 to 4, wherein one end of the worm is provided with an annular protrusion.
6. The overload protection mechanism for a multi-turn electric actuator used in a small space according to claim 5, wherein the belleville springs are assembled in an involutory manner.
7. The overload protection mechanism for a multi-turn electric actuator used in a small space according to claim 6, wherein 6 disc springs are respectively provided at both ends of the worm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922248360.4U CN212056041U (en) | 2019-12-16 | 2019-12-16 | Overload protection mechanism of multi-rotation electric actuating mechanism for small space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922248360.4U CN212056041U (en) | 2019-12-16 | 2019-12-16 | Overload protection mechanism of multi-rotation electric actuating mechanism for small space |
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| Publication Number | Publication Date |
|---|---|
| CN212056041U true CN212056041U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922248360.4U Active CN212056041U (en) | 2019-12-16 | 2019-12-16 | Overload protection mechanism of multi-rotation electric actuating mechanism for small space |
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| CN (1) | CN212056041U (en) |
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Denomination of utility model: Overload protection mechanism of multi rotary electric actuator for small space Effective date of registration: 20221201 Granted publication date: 20201201 Pledgee: Rizhao Bank Co.,Ltd. Donggang sub branch Pledgor: RIZHAO DEYI INTELLIGENT INSTRUMENT Co.,Ltd. Registration number: Y2022980024313 |