CN217582938U - Manual-automatic switching mechanism and electric actuator - Google Patents
Manual-automatic switching mechanism and electric actuator Download PDFInfo
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- CN217582938U CN217582938U CN202220378671.1U CN202220378671U CN217582938U CN 217582938 U CN217582938 U CN 217582938U CN 202220378671 U CN202220378671 U CN 202220378671U CN 217582938 U CN217582938 U CN 217582938U
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Abstract
The utility model discloses a manual-automatic switching mechanism and electric actuator: the hand-operated electric hand-operated device comprises a main driving wheel, a main driving shaft and a hand driving device, wherein a first clutch and a second clutch which can axially slide are respectively arranged at two ends of the main driving shaft, and the first clutch and the second clutch are connected through a connecting piece. The end part of the main driving shaft is provided with an eccentric cam, the side part of the shifting ring is provided with a hinged shifting block, and the shifting block is provided with an elastic device for driving the shifting block to rotate in a direction parallel to the main driving shaft; when the second clutch is combined with the hand driving device, the end part of the shifting block props against the end part of the eccentric cam or the main driving wheel, and the minimum diameter position of the eccentric cam is smaller than the inward maximum folding position of the shifting block. The utility model discloses can realize hand automatic switch-over fast. When the shifting fork needs to be switched to be driven by the motor, the shifting fork does not need to be operated, the motor is directly started, the eccentric cam can automatically open the shifting block to enable the shifting block to lose supporting force, and the first clutch and the main driving gear are automatically combined under the action of the spring to realize electric driving.
Description
Technical Field
The utility model relates to an electric actuator technical field, concretely relates to manual-automatic switching mechanism and electric actuator.
Background
Electric actuators are usually provided with a hand-operated device, and in order to protect the operator, the hand-operated device is in a disengaged state when the electric actuator is driven by a motor, and likewise, when the operation is performed manually, the motor portion is also in a disengaged state. In the prior art, the above function is usually realized by linking a clutch at the motor drive end and a clutch at the hand drive end.
The clutch is usually a jaw clutch in the prior art, which can not be engaged at any angle, but only at some specific angles, so that when manual and automatic switching is performed, the corresponding clutch needs to be ensured.
SUMMERY OF THE UTILITY MODEL
For solving the not enough among the prior art, the utility model provides a manual-automatic switching mechanism and electric actuator has solved among the prior art electric actuator manual-automatic switching mechanism and has switched convenient and fast's technical problem inadequately.
In order to realize the above object, the utility model adopts the following technical scheme:
a manual-automatic switching mechanism comprises: the hand-operated electric hand-operated device comprises a main driving wheel, a main driving shaft and a hand driving device, wherein a first clutch and a second clutch which can axially slide are respectively arranged at two ends of the main driving shaft, and the first clutch and the second clutch are connected through a connecting piece;
when the first clutch is combined with the main driving gear, the second clutch is separated from the hand driving device;
when the second clutch is combined with the hand driving device, the first clutch is separated from the main driving teeth.
Preferably, the manual-automatic switching mechanism: the end part of the main driving shaft is provided with an eccentric cam, the main driving shaft is provided with a bearing seat, the bearing seat is connected with a shifting ring through a guide rod parallel to the main driving shaft, and the shifting ring is sleeved on the first clutch;
the side part of the shifting ring is provided with a hinged shifting block, and the shifting block is provided with an elastic device for driving the shifting block to rotate in a direction parallel to the main driving shaft;
when the second clutch is combined with the hand driving device, the end part of the shifting block props against the end part of the eccentric cam or the main driving wheel, and the minimum diameter part of the eccentric cam is smaller than the inward maximum folding position of the shifting block.
Preferably, the manual-automatic switching mechanism of the foregoing type: and a spring is arranged between the first clutch and the end part of the main driving shaft, and at least two tension springs are arranged between the shifting ring and the bearing seat.
Preferably, the manual-automatic switching mechanism of the foregoing type: the connecting piece is a mandrel which is arranged at the axis of the main driving shaft and can axially float in the main driving shaft.
Preferably, the manual-automatic switching mechanism of the foregoing type: the clutch bi-pass is driven axially by the shifting fork.
Preferably, the manual-automatic switching mechanism of the foregoing type: the main driving shaft is a worm, and the worm is meshed with the worm wheel.
Preferably, the manual-automatic switching mechanism of the foregoing type: the outer surface of the main driving shaft is also provided with a spiral groove which is meshed with a speed measuring gear, and the speed measuring gear is connected with a sensor.
Preferably, the manual-automatic switching mechanism: the main driving wheel is connected with a power output shaft of the motor.
Preferably, the manual-automatic switching mechanism: the first clutch is connected to one end of the main driving shaft through a spline, and the second clutch is connected to the other end of the main driving shaft through a spline.
An electric actuator: the manual/automatic switching mechanism includes any one of the above-described mechanisms.
The utility model discloses the beneficial effect who reaches:
compared with the prior art, the utility model discloses can realize hand automatic switch-over fast, under normal condition, clutch one combines together with the main drive axle under the effect of spring, when needs manual drive, only needs the operation shift fork to make clutch two combine with hand drive arrangement and can realize the hand drive. When the shifting fork needs to be switched to be driven by the motor, the shifting fork does not need to be operated, the motor only needs to be directly started, the eccentric cam can automatically open the shifting block to enable the shifting block to lose supporting force, and the first clutch and the main driving gear are automatically combined under the action of the spring to realize electric driving. The utility model discloses an electric actuator's convenient fast switch over.
Drawings
Fig. 1 is a sectional view of the manual/automatic switching mechanism of the present invention;
FIG. 2 is a perspective view of the manual/automatic switching mechanism of the present invention;
FIG. 3 is a structural view of the main driving wheel of the present invention;
FIG. 4 is a front view of the main driving wheel, the first clutch and the first shifting block (the shifting block abuts against the end of the main driving wheel);
FIG. 5 is a front view of the main driving wheel, the first clutch and the second shifting block (the shifting block is separated from the end of the main driving wheel);
the meaning of the reference numerals: 1-a main driving wheel; 2, a first clutch; 3-a main drive shaft; 4-mandrel; 5-clutch two; 6-a hand drive; 7-bearing seats; 8-shifting blocks; 9-a speed measuring gear; 11-an eccentric cam; 12-main drive teeth; 21-a spring; 31-a worm gear; 32-helical groove; 51-a shifting fork; 71-a guide bar; 72-a dial ring; 73-tension spring.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 3: the embodiment discloses a manual-automatic switching mechanism: comprises a main driving wheel 1, a main driving shaft 3 and a hand driving device 6, wherein the main driving wheel 1 is connected with a power output shaft of a motor.
The two ends of the main driving shaft 3 are respectively provided with a first clutch 2 and a second clutch 5 which can slide axially, the first clutch 2 and the second clutch 5 are connected with the main driving shaft 3 in a spline connection mode, and the torque can be transmitted while the axial displacement is realized.
The first clutch 2 and the second clutch 5 are connected through a connecting piece, the axial distance between the first clutch 2 and the second clutch 5 is equal through the connecting piece, and synchronous movement of the first clutch 2 and the second clutch 5 is guaranteed. The first clutch 2 and the second clutch 5 of the present embodiment are generally jaw clutches of the prior art, and the end of the main driving wheel 1 is provided with main driving teeth 12 matched with the first clutch 2.
When the first clutch 2 is engaged with the main drive teeth 12, the second clutch 5 is disengaged from the hand drive 6, which is now driven by the motor. When the second clutch 5 is combined with the hand driving device 6, the first clutch 2 is separated from the main driving teeth 12, at the moment, the motor is separated from the main driving shaft 3, and the main driving shaft 3 is driven manually. The end of the hand driving device 6 is provided with a jaw type driving tooth matched with the second clutch 5, and the specific structure is similar to that of the main driving tooth 12.
The end of the main drive shaft 3 of this embodiment is provided with an eccentric cam 11, the main drive shaft 3 is provided with a bearing seat 7, and the bearing seat 7 fixes the main drive shaft 3 through a bearing. The bearing block 7 is connected to a dial 72 by a guide rod 71 parallel to the main drive shaft 3, the dial 72 being axially slidable along the guide rod 71. The shifting ring 72 is sleeved on the first clutch 2 and moves axially synchronously with the first clutch 2.
The side of the dial ring 72 is provided with a hinged dial 8, and the dial 8 is provided with an elastic means, typically a torsion spring, for driving the dial 8 to rotate in a direction parallel to the main drive shaft 3, typically to a maximum angle when the dial 8 is rotated to the axial direction of the main drive shaft 3.
With reference to fig. 4 and 5: when the second clutch 5 is combined with the hand driving device 6, the end part of the shifting block 8 is abutted against the eccentric cam 11 or the minimum diameter part of the eccentric cam 11 at the end part of the main driving wheel 1, specifically, the eccentric cam 11 or the minimum diameter part of the eccentric cam 11 of the main driving wheel 1, and is determined by the circumferential position of the shifting block 8 relative to the main driving wheel 1. The minimum diameter (11 a in fig. 3) of the eccentric cam 11 is smaller than the maximum inward folded position of the shift block 8, and when the shift block 8 is in the supporting state, the end supporting positions of the shift block 8 may be two, namely, the end of the eccentric cam 11 and the end of the main driving wheel 1, when the supporting position is the former, it indicates that the shift block 8 supports the position where the diameter of the eccentric cam 11 is relatively larger, and when the supporting position is the latter, it indicates that the shift block 8 supports the position where the diameter of the eccentric cam 11 is the minimum, at the end of the main driving wheel 1. Thus, when the main driving wheel 1 rotates for one circle, the shifting block 8 can be certainly rotated to the position of the minimum diameter of the eccentric cam 11 at the end part of the main driving wheel 1, so that the shifting block 8 can be shifted when the main driving wheel 1 continues to rotate until the shifting block 8 does not support the end part of the main driving wheel 1.
The purpose of the spring 21 arranged between the first clutch 2 and the end part of the main driving shaft 3 and the at least two tension springs 73 arranged between the shifting ring 72 and the bearing seat 7 is to ensure that the first clutch 2 and the end part of the main driving shaft 3 are in elastic axial movement relation, and the first clutch 2 can be combined with the main driving shaft 3 under the condition that the first clutch 2 is only acted by the spring 21 and the tension springs 73 (the shifting fork 51 and the shifting block 8 do not exert axial force on the corresponding clutch).
The connecting member is a mandrel 4 disposed at the axial center of the main drive shaft 3 and axially movable inside the main drive shaft 3. When manual and automatic switching is required, the second clutch 5 of the present embodiment is driven axially by the shift fork 51.
The main driving shaft 3 of the present embodiment is usually a worm, the worm is meshed with the worm wheel 31, and in order to monitor the rotation speed or position of the worm wheel 31, the present embodiment is further provided with a monitoring system, specifically: the outer surface of the main driving shaft 3 is also provided with a spiral groove 32, the spiral groove 32 is meshed with a speed measuring gear 9, and the speed measuring gear 9 is connected with a speed sensor or/and an angle sensor.
When the hand-operated electric hand-driven device is used, the main driving wheel 1 is driven to rotate by the motor, the hand-operated device 6 usually comprises a hand wheel and a speed reducing mechanism, and the speed reducing mechanism is usually a planetary speed reducing mechanism and is used for realizing a larger speed reducing ratio. When the manual driving mode needs to be switched, the second clutch 5 is driven by the shifting fork 51 to axially slide towards the direction of the manual driving device 6, the second clutch 5 is combined with the manual driving device 6 and transmits torque, and meanwhile, the mandrel 4 pulls the first clutch 2 to be separated from the main driving teeth 12, so that the main driving shaft 3 can be driven to rotate by the manual driving device 6. In practical use, since the hand drive is usually a temporary short-distance drive, the shift fork 51 may be designed in a design that does not require locking, i.e., one hand operates the hand driving device 6 and the other hand holds the shift fork 51. The fork 51 is usually provided with a corresponding fork torsion spring, and when shifting the system to the hand-driven mode, loosening the fork 51, the fork 51 will automatically rebound to the original position under the action of this torsion spring.
Since the hand driving device 6 is driven to rotate by hand driving, even if the second clutch 5 is not exactly combined with the hand driving device 6 when the shifting fork 51 is operated, the hand wheel on the hand driving device 6 can be rotated to realize rapid combination. After the second clutch 5 is combined with the hand driving device 6, under the action of the torsion spring, the shifting block 8 rotates to an angle of propping against the end part of the main driving wheel 1 or the eccentric cam 11, so that the second clutch 5 is prevented from being separated from the hand driving device 6, namely the state shown in fig. 4, and even if the shifting fork 51 is loosened, the system is still in the hand driving device.
When the motor is required to be driven, the motor is directly started to drive the main driving wheel 1 to rotate, the shifting block 8 can be moved to the outer edge position of the minimum diameter position (11 a position in fig. 3) of the eccentric cam 11, along with the continuous rotation of the main driving wheel 1, the eccentric cam 11 shifts the shifting block 8 open, so that the shifting block no longer abuts against the end part of the main driving wheel 1, and under the combined action of the spring 21 and the tension spring 73, the first clutch 2 is combined with the main driving gear 12, namely when the motor is required to be driven, the shifting block 8 can be automatically unlocked only by starting the motor to rotate, so that the first clutch 2 is combined with the main driving gear 12.
When the main driving shaft 3 works, the spiral groove 32 drives the speed measuring gear 9 to rotate, so that the rotating speed and the angle of the speed measuring gear are monitored. In addition, in the manual-automatic switching process, the main driving shaft 3 does not generate axial displacement, so that the monitoring of speed and angle is not influenced by manual-automatic switching.
The embodiment also discloses an electric actuator: the manual/automatic switching mechanism of the present embodiment is included.
Compared with the prior art, this embodiment can realize hand automatic switch fast, and under normal condition, clutch one 2 combines together with main drive axle 3 under the effect of spring, when needs manual drive, only needs operation shift fork 51 to make clutch two 5 and hand drive 6 combinations realize hand drive. When the motor drive is required to be switched, the shifting fork 51 does not need to be operated again, the motor only needs to be directly started, the eccentric cam 11 can automatically open the shifting block 8, the shifting block loses the supporting force, and the first clutch 2 and the main drive gear 12 are automatically combined under the action of the spring to realize electric drive. The embodiment realizes convenient and quick switching of the electric actuator.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a manual-automatic switching mechanism which characterized in that: the hand-operated electric hand-operated power tool comprises a main driving wheel (1), a main driving shaft (3) and a hand driving device (6), wherein a first clutch (2) and a second clutch (5) which can axially slide are respectively arranged at two ends of the main driving shaft (3), and the first clutch (2) and the second clutch (5) are connected through a connecting piece;
when the first clutch (2) is combined with the main driving gear (12), the second clutch (5) is separated from the hand driving device (6);
when the second clutch (5) is combined with the hand driving device (6), the first clutch (2) is separated from the main driving teeth (12).
2. The manual-automatic switching mechanism according to claim 1, wherein: an eccentric cam (11) is arranged at the end part of the main driving shaft (3), a bearing seat (7) is arranged on the main driving shaft (3), the bearing seat (7) is connected with a shifting ring (72) through a guide rod (71) parallel to the main driving shaft (3), and the shifting ring (72) is sleeved on the first clutch (2);
a hinged shifting block (8) is arranged on the side part of the shifting ring (72), and an elastic device for driving the shifting block (8) to rotate in the direction parallel to the main driving shaft (3) is arranged on the shifting block (8);
when the second clutch (5) is combined with the hand driving device (6), the end part of the shifting block (8) is propped against the end part of the eccentric cam (11) or the main driving wheel (1), and the minimum diameter part of the eccentric cam (11) is smaller than the inward maximum folding position of the shifting block (8).
3. The manual-automatic switching mechanism according to claim 2, wherein: a spring (21) is arranged between the first clutch (2) and the end of the main driving shaft (3), and at least two tension springs (73) are arranged between the shifting ring (72) and the bearing seat (7).
4. The manual-automatic switching mechanism according to claim 1, wherein: the connecting piece is a mandrel (4) which is arranged at the axle center of the main driving shaft (3) and can axially move in the main driving shaft (3).
5. The manual-automatic switching mechanism according to claim 1, wherein: the second clutch (5) is axially driven by a shifting fork (51).
6. The manual-automatic switching mechanism according to claim 1, wherein: the main driving shaft (3) is a worm, and the worm is meshed with a worm wheel (31).
7. The manual-automatic switching mechanism according to claim 1, wherein: the outer surface of the main driving shaft (3) is also provided with a spiral groove (32), the spiral groove (32) is meshed with a speed measuring gear (9), and the speed measuring gear (9) is connected to a sensor.
8. The manual-automatic switching mechanism according to claim 1, wherein: the main driving wheel (1) is connected with a power output shaft of the motor.
9. The manual-automatic switching mechanism according to claim 2, wherein: the first clutch (2) is connected to one end of the main driving shaft (3) through a spline, and the second clutch (5) is also connected to the other end of the main driving shaft (3) through a spline.
10. An electric actuator, characterized in that: the manual-automatic switching mechanism according to any one of claims 1 to 9 is included.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220378671.1U CN217582938U (en) | 2022-02-24 | 2022-02-24 | Manual-automatic switching mechanism and electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220378671.1U CN217582938U (en) | 2022-02-24 | 2022-02-24 | Manual-automatic switching mechanism and electric actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582938U true CN217582938U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220378671.1U Active CN217582938U (en) | 2022-02-24 | 2022-02-24 | Manual-automatic switching mechanism and electric actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217582938U (en) |
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2022
- 2022-02-24 CN CN202220378671.1U patent/CN217582938U/en active Active
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