CN219888679U

CN219888679U - Actuator

Info

Publication number: CN219888679U
Application number: CN202320327990.4U
Authority: CN
Inventors: 王超
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-10-24
Anticipated expiration: 2033-02-28

Abstract

Disclosed herein is an actuator comprising: the output shaft of the driving device is connected with an output gear; the actuating mechanism comprises a push rod and a first bevel gear which are mutually in threaded connection; the double gear is arranged between the driving device and the executing mechanism and is meshed with the output gear and the first bevel gear respectively; the axis of the output gear, the rotation axis of the duplex gear and the axis of the actuating mechanism are mutually parallel, and the axis of the output gear is overlapped with the axis of the output shaft; the driving device is configured to drive the output gear to drive the duplex gear to rotate, and the duplex gear drives the first bevel gear to rotate so as to drive the push rod to reciprocate. The axial line of the output gear, the rotation axis of the duplex gear and the axial line of the actuating mechanism are mutually parallel, and the axial line of the output gear is coincident with the axial line of the output shaft, so that the actuator has a compact structure, occupies small space and reduces the production cost.

Description

Actuator

Technical Field

The utility model relates to the technical field of new energy automobile parts, in particular to an actuator.

Background

At present, door handles of most automobiles are of exposed convex design, on one hand, the design needs to consider the modeling of the door handle, and needs to be matched with the side surface of the automobile body so as to ensure good appearance, thus causing various limitations; on the other hand, the whole door handle is exposed, so that the inner side and the outer side of the handle are easy to be stained, and a driver can easily stain hands when opening the door; in addition, the outer convex of the door handle not only damages the appearance of the side face of the whole automobile, but also causes certain wind resistance and increases the running resistance of the automobile, and the door handle of the automobile with the design not only prevents the running of the automobile, but also causes unnecessary trouble under special conditions.

The actuator is a force-exerting component when the door handle stretches out, the hidden door handle can be slowly ejected out of the automobile body when being assembled and used, so that the automobile body is more concise and scientific, but most of electric door handle actuators in the current market adopt inclined arrangement of duplex gears, so that the transmission has large friction resistance at work, low transmission speed and difficult guarantee of assembly precision. Accordingly, there is a need to provide a new actuator solution to the above-mentioned problems.

Disclosure of Invention

An object of the present utility model is to provide an actuator that is simple in construction and inexpensive to produce.

An actuator, comprising:

the output shaft of the driving device is connected with an output gear;

the actuating mechanism comprises a push rod and a first bevel gear which are mutually in threaded connection;

the double gear is arranged between the driving device and the executing mechanism and is meshed with the output gear and the first bevel gear respectively;

the axis of the output gear, the rotation axis of the duplex gear and the axis of the actuating mechanism are mutually parallel, and the axis of the output gear is overlapped with the axis of the output shaft;

the driving device is configured to drive the output gear to drive the duplex gear to rotate, and the duplex gear drives the first bevel gear to rotate so as to drive the push rod to reciprocate.

Preferably, the double gear includes a second bevel gear engaged with the output gear and a third bevel gear engaged with the first bevel gear.

Preferably, a trapezoid external thread is arranged at the upper part of the push rod, an internal thread matched with the trapezoid external thread is arranged on the first helical gear, and the internal thread is in threaded connection with the trapezoid external thread.

Preferably, the actuator further comprises a housing, wherein the housing comprises an upper housing and a lower housing connected with the upper housing, and the upper housing and the lower housing are connected in a welding mode.

Preferably, the lower housing is provided with a first mounting groove, a second mounting groove and a third mounting groove, the axes of the first mounting groove, the second mounting groove and the third mounting groove are arranged in parallel, the driving device and the output gear are mounted in the first mounting groove, the duplex gear is mounted in the second mounting groove, and the executing mechanism is mounted in the third mounting groove.

Preferably, a limiting block is arranged at the end of the trapezoid external thread, and the limiting block is abutted with the third mounting groove when the push rod is in the maximum extension displacement state.

Preferably, a first rotating shaft is arranged on the end face of the second bevel gear, which is opposite to the third bevel gear, a second rotating shaft is arranged on the end face of the third bevel gear, which is opposite to the second bevel gear, and the axis of the first rotating shaft and the axis of the second rotating shaft are coincident with the rotation axis of the duplex gear.

Preferably, two ends of the second installation groove are respectively provided with a first shaft seat matched with the first rotating shaft and a second shaft seat matched with the second rotating shaft, the first rotating shaft is carried on the first shaft seat, the second rotating shaft is carried on the second shaft seat, and the second bevel gear and the third bevel gear are suspended in the second installation groove.

Preferably, the transmission ratio of the output gear to the first helical gear is 4-81.

Preferably, the output power of the driving device is 3W-50W.

The utility model has the following beneficial effects:

1. according to the actuator, the axis of the output gear, the rotation axis of the duplex gear and the axis of the actuating mechanism are mutually parallel, and the axis of the output gear is overlapped with the axis of the output shaft, so that the loss of output force is avoided, the structure is compact, and the assembly is convenient, so that the production cost is reduced.

2. The actuator of the utility model designs the external thread of the screw rod into the trapezoid external thread by utilizing the characteristics of high strength, good manufacturability and wear resistance of the trapezoid thread.

3. The actuator provided by the utility model ensures that the push rod stops at the position of the maximum extension by arranging the limiting block, and simultaneously plays a role in limiting the rotation of the push rod.

4. The second bevel gear and the third bevel gear of the actuator are suspended in the second mounting groove, so that abrasion caused by friction generated when the second bevel gear and the third bevel gear are contacted with the second mounting groove is avoided.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic view of the internal structure of an actuator casing according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the overall structure of an actuator according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a push rod in an actuator according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a first helical gear in an actuator according to a preferred embodiment of the present utility model;

FIG. 5 is a schematic view of the configuration of a duplex gear in an actuator according to a preferred embodiment of the utility model;

fig. 6 is a schematic structural view of a lower housing in the actuator according to the preferred embodiment of the present utility model.

The figures are marked as follows:

1-driving device, 2-output gear, 3-push rod, 31-trapezoid external thread, 32-limiting block,

4-a first helical gear, 41-an internal thread, 5-a duplex gear, 51-a second helical gear,

52-third bevel gear, 53-first rotating shaft, 54-second rotating shaft, 6-upper shell, 7-lower shell,

71-a first mounting groove, 72-a second mounting groove, 73-a third mounting groove, 74-a slideway,

75-a first shaft seat and 76-a second shaft seat.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

As shown in fig. 1 and 2, an actuator includes:

a driving device 1, wherein an output shaft of the driving device 1 is connected with an output gear 2;

the actuating mechanism comprises a push rod 3 and a first bevel gear 4 which are mutually in threaded connection;

a double gear 5, wherein the double gear 5 is installed between the driving device 1 and the actuating mechanism, and the double gear 5 is respectively meshed with the output gear 2 and the first bevel gear 4;

the axis of the output gear 2, the rotation axis of the duplicate gear 5 and the axis of the actuating mechanism are mutually parallel, and the axis of the output gear 2 is overlapped with the axis of the output shaft;

the driving device 1 is configured to drive the output gear 2 to drive the duplex gear 5 to rotate, and the duplex gear 5 drives the first helical gear 4 to rotate, so as to drive the push rod 3 to reciprocate.

Specifically, the actuator comprises a driving device 1, a duplex gear 5 and an actuating mechanism, wherein the duplex gear 5 is arranged between the driving device 1 and the actuating mechanism, and the driving device 1, the duplex gear 5 and the actuating mechanism are arranged in parallel, namely, the rotation axis of the driving device 1, the rotation axis of the duplex gear 5 and the axis of the actuating mechanism are parallel.

More specifically, the output shaft of the driving device 1 is connected with the output gear 2, and the axis of the output gear 2 coincides with the rotation axis of the driving device 1, that is, the axis of the output gear 2, the rotation axis of the duplicate gear 5 and the axis of the actuator are parallel to each other; the actuating mechanism comprises a push rod 3 and a first helical gear 4, the push rod 3 and the first helical gear 4 are in threaded connection with each other, and a duplex gear 5 is meshed with the output gear 2 and the first helical gear 4 respectively. The driving device 1 is configured to drive the output gear 2 to drive the duplex gear 5 to rotate, and the duplex gear 5 drives the first helical gear 4 to rotate, so as to drive the push rod 3 to reciprocate.

In the present embodiment, the driving device 1 is a motor.

In other embodiments, the drive device 1 is a hydraulic motor.

Therefore, the output force loss is avoided by mutually parallel the axis of the output gear 2, the rotation axis of the duplex gear 5 and the axis of the actuating mechanism, the structure is compact, the assembly is convenient, and the production cost is reduced.

As shown in fig. 5, the duplex gear 5 includes a second helical gear 51 and a third helical gear 52, the second helical gear 51 being meshed with the output gear 2, the third helical gear 52 being meshed with the first helical gear 4.

Specifically, in order to achieve transmission of the output force of the output gear 2 to the first helical gear 4, the inventors designed the duplex gear 5 to include a second helical gear 51 meshed with the output gear 2 and a third helical gear 52 meshed with the first helical gear 4, and the axis of the second helical gear 51 coincides with the axis of the third helical gear 52; the output gear 2 drives the third bevel gear 52 to rotate through the second bevel gear 51, and further drives the first bevel gear 4 to rotate.

In the present embodiment, in order to reduce the output rotation speed and increase the output torque, the inventors designed the number of teeth of the second helical gear 51 to be larger than the number of teeth of the output gear 2 and the number of teeth of the third helical gear 52, respectively, and designed the number of teeth of the first helical gear 4 to be larger than the number of teeth of the third helical gear 52, so that the stepwise speed reduction is realized and the output torque is increased to increase the output force.

All gears are set to be bevel gears, and the change of the spiral degree of the bevel gears is mainly utilized to ensure the motion stability of gear meshing; the bearing capacity of the gear can be improved due to the increase of the overlap ratio of the bevel gears, so that the service life of the gear is prolonged, and meanwhile, the bevel gears are compact in structure and can bring relatively ideal deceleration effect.

Thus, by providing the second bevel gear 51 and the third bevel gear 52, a force transmission from the output gear 2 to the first bevel gear 4 is achieved, a stepwise deceleration and an increase in the output force are achieved.

As shown in fig. 3, a trapezoidal external thread 31 is disposed at the upper part of the push rod 3, an internal thread 41 matched with the trapezoidal external thread is disposed on the first helical gear 4, and the internal thread 41 is in threaded connection with the trapezoidal external thread 31.

In this embodiment, in order to achieve the mutual screwing of the push rod 3 and the first helical gear 4, the upper portion of the push rod 3 is provided with a trapezoidal external thread 31, the center of the first helical gear 4 is provided with an internal thread 41 matching with the trapezoidal external thread 31, and the length of the trapezoidal external thread 31 at least needs to satisfy the maximum predetermined moving distance of the push rod 3.

The trapezoidal thread is characterized in that the tooth shape is isosceles trapezoid, the tooth angle is 30 degrees, and the internal thread and the external thread are tightly adhered by the conical surface and are not easy to loosen. Compared with rectangular threads, the method has the advantages of good manufacturability, high tooth root strength and good centering. Generally 30 trapezoidal threads are thicker and stronger than the pitch diameter of ordinary 60 or 55 threads, and are more resistant to galling than other threads. Compared with square screw thread, it has good strength, good centering, adjustable gap and good technological performance.

Therefore, the external thread on the upper part of the screw rod is designed into the trapezoidal thread by utilizing the characteristics of high strength, good manufacturability and wear resistance of the trapezoidal thread.

As shown in fig. 2, the actuator further comprises a housing, the housing comprises an upper housing 6 and a lower housing 7 connected with the upper housing, and the upper housing 6 and the lower housing 7 are connected in a welding mode.

Specifically, in order to achieve the protection level of the housing, the upper housing 6 and the lower housing 7 are connected by welding. The welding mode can adopt one of a laser welding mode, an ultrasonic welding mode, a resistance welding mode and a friction welding mode.

The laser welding method is an efficient and precise welding method which uses a laser beam with high energy density as a heat source.

The ultrasonic welding method is to transfer high-frequency vibration waves to the surfaces of two objects to be welded, and under the condition of pressurization, the surfaces of the two objects are rubbed with each other to form fusion between molecular layers.

The resistance welding method is a method of welding by using a strong current to pass through a contact point between an electrode and a workpiece and generating heat by a contact resistance.

The friction welding method is a method of welding a workpiece by generating plastic deformation under pressure by using heat generated by friction of a workpiece contact surface as a heat source.

In other embodiments, the upper casing 6 and the lower casing 7 are connected by screw connection, in order to ensure the protection level of the casings, sealing strips are arranged on the connecting end surfaces of the upper casing 6 and the lower casing 7, and the bolts are glued by sealant.

Preferably, the lower housing 7 is provided with a first mounting groove 71, a second mounting groove 72 and a third mounting groove 73, axes of the first mounting groove 71, the second mounting groove 72 and the third mounting groove 73 are arranged in parallel, the driving device 1 and the output gear 2 are mounted in the first mounting groove 71, the duplex gear 5 is mounted in the second mounting groove 72, and the actuating mechanism is mounted in the third mounting groove 73.

Specifically, in order to ensure that the axis of the output gear 2, the rotation axis of the tandem gear 5, and the axis of the actuator are parallel to each other, the lower case 7 is provided with three mounting grooves having parallel axes, namely, a first mounting groove 71, a second mounting groove 72, and a third mounting groove 73, respectively, the driving device 1 and the output gear 2 are mounted in the first mounting groove 71, the tandem gear 5 is mounted in the second mounting groove 72, and the actuator is mounted in the third mounting groove 73.

As shown in fig. 3, a stopper 32 is disposed at the end of the trapezoidal external thread 31, and the stopper 32 abuts against the third mounting groove 7 when the push rod 3 is in the maximum extended displacement state.

Specifically, in order to ensure that the push rod 3 stops at the maximum extension position, a stopper 32 is provided at the end of the trapezoidal external thread 31, while the push rod 31 is restricted from rotating by the stopper 32.

In this embodiment, the outer contour of the limiting block 32 is in a cross shape, and a slide way 74 matched with the limiting block 32 is arranged at the position of the third mounting groove 73 corresponding to the movement of the push rod 31, so that the limiting block 32 is ensured to move on the slide way 74, and meanwhile, the push rod 31 is prevented from rotating.

As shown in fig. 2 and 5, a first rotating shaft 53 is provided on an end surface of the second helical gear 51 facing away from the third helical gear 52, a second rotating shaft 54 is provided on an end surface of the third helical gear 52 facing away from the second helical gear 51, and an axis of the first rotating shaft 53 and an axis of the second rotating shaft 54 are coincident with a rotation axis of the tandem gear 5.

Preferably, a first shaft seat 75 matched with the first shaft 53 and a second shaft seat 76 matched with the second shaft 54 are respectively arranged at two ends of the second mounting groove 72, the first shaft 53 is mounted on the first shaft seat 75, the second shaft 54 is mounted on the second shaft seat 76, and the second bevel gear 51 and the third bevel gear 52 are suspended in the second mounting groove 72.

Specifically, in order to ensure that the duplex gear 5 can freely rotate in the second mounting groove 72, two rotating shafts are provided on two end surfaces of the duplex gear 5, namely, a first rotating shaft 53 is provided on an end surface of the second bevel gear 51 facing away from the third bevel gear 52, a second rotating shaft 54 is provided on an end surface of the third bevel gear 52 facing away from the second bevel gear 51, a first shaft seat 75 and a second shaft seat 76 for carrying the first rotating shaft 53 and the second rotating shaft 54 are provided at two ends of the second mounting groove 72, the first rotating shaft 53 is carried on the first shaft seat 75, the second rotating shaft 54 is carried on the second shaft seat 76, the second bevel gear 51 and the third bevel gear 52 are suspended in the second mounting groove 72, the surface profile of the first shaft seat 75 matches the outer profile of the first rotating shaft 53, and the surface profile of the second shaft seat 76 matches the outer profile of the second rotating shaft 54.

Therefore, the second bevel gear 51 and the third bevel gear 52 are suspended in the second mounting groove 72 by arranging the first rotating shaft 53 and the second rotating shaft 54, so that abrasion and abnormal noise caused by friction generated by contact between the second bevel gear 51 and the third bevel gear 52 and the second mounting groove 73 are avoided.

Preferably, the transmission ratio of the output gear 2 to the first helical gear 4 is 4-81.

Specifically, the transmission ratio of the output gear 2 to the first helical gear 4 is 4 to 81. In this embodiment, the output gear 2 is a driving wheel, the first helical gear 4 is a driven wheel, and it can be seen from the formula that the transmission ratio is inversely proportional to the rotation speed of the driven wheel, i.e. the smaller the transmission ratio, the larger the rotation speed of the driven wheel, and abnormal noise may occur easily due to inaccurate control. Therefore, the inventor selects the driving wheel, namely, the output gear 2, to test the transmission ratio of different output gears 2 to the first helical gear 4 under the condition that the rotation speed is unchanged, and observes that the number of times of ejection or opening actions of the push rod 3 is completed within 1 minute is less than 40 times, and the result is shown in table 1.

Table 1: influence of the transmission ratio of the output gear 2 to the first bevel gear 4 on the speed of the actuator

Ratio of transmission	3	4	10	20	30	40	48	55	60	75	81	84
													Number of completions	162	155	142	128	115	99	87	74	63	51	40	38
Whether or not to make abnormal sound	Is that	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not

As can be seen from table 1, if the transmission ratio of the output gear 2 to the first helical gear 4 is less than 4, abnormal noise occurs in the actuator, so that the actuator is not qualified; meanwhile, when the transmission ratio of the output gear 2 to the first bevel gear 4 is larger than 81, the locking or opening actions of the actuator completed within 1 minute are less than 40 times, and the response speed is too slow and is not qualified; therefore, the inventor selects the transmission ratio of the output gear 2 and the first helical gear 4 to be 4-81.

Preferably, the output power of the driving device 1 is 3W-50W.

Specifically, the output power of the driving device 1 is 3W to 50W. The output power of the driving device 1 determines the working speed of the actuator, and the higher the power is, the faster the actuator completes the work, the lower the power is, the slower the actuator completes the work, and even the ejection work of the push rod 3 cannot be completed. In order to test the influence of output power on the operation of an actuator, the inventor performs relevant tests, wherein the testing method is to select driving devices 1 with different output powers, other structures of the actuator are the same, each driving device 1 continuously works for 1 minute, the number of times that the actuator finishes the operation is recorded, the number of times is more than or equal to 40 and is qualified, and the number of times is less than 40 and is not qualified. If abnormal sound occurs during the operation of the actuator, the actuator is regarded as unqualified. The results are shown in Table 2.

Table 2: influence of different output powers on actuator speed and abnormal sound

Power (W)	2.5	3	5.5	8	10	12.4	15	26	30	38	40	50	52
														Number of completions	39	40	62	83	94	98	106	119	126	137	144	157	162
Whether or not to make abnormal sound	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Whether or not	Is that

As shown in table 2, when the output power of the driving device 1 is less than 3W, the number of times of switching performed by the actuator is less than 40 within 1 minute, and the speed is too slow to be qualified, so the inventor selects the minimum power of the driving device 1 to be 3W, when the output power of the driving device 1 is greater than 50W, the actuator is affected by the overall design, the speed enters the bottleneck period without obvious improvement, and meanwhile, abnormal noise occurs, so the output power of the driving device 1 selected by the inventor is 3W-50W. Specifically, 3W, 5.5W, 8W, 10W, 12.4W, 15W, 26W, 30W, 38W, 40W, 50W, etc. are possible.

The working principle of the actuator is described in detail below with reference to the accompanying drawings: the motor 1 is started, the output shaft rotates to drive the output gear 2 to rotate, the output gear 2 is meshed with the second helical gear 51 and drives the second helical gear 51 and the third helical gear 52 to rotate together, the third helical gear 52 is meshed with the first helical gear 4 and drives the first helical gear 4 to rotate, the internal thread 41 of the first helical gear 4 is in threaded connection with the trapezoid external thread 31 of the push rod 3, so that the first helical gear 4 converts rotation into linear motion of the push rod 3, when the push rod 3 reaches a preset maximum movement displacement, the limiting block 32 is in abutting connection with the front end of the third groove 73, and the push rod 3 stops moving. When the motor 1 rotates in the reverse direction, the push rod 3 retracts.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. An actuator, comprising:

the output shaft of the driving device is connected with an output gear;

2. The actuator of claim 1, wherein: the duplex gear comprises a second bevel gear and a third bevel gear, the second bevel gear is meshed with the output gear, and the third bevel gear is meshed with the first bevel gear.

3. The actuator of claim 2, wherein: the upper part of the push rod is provided with a trapezoid external thread, the first bevel gear is provided with an internal thread matched with the trapezoid external thread, and the internal thread is in threaded connection with the trapezoid external thread.

4. An actuator according to claim 3, wherein: the actuator further comprises a shell, wherein the shell comprises an upper shell and a lower shell connected with the upper shell, and the upper shell and the lower shell are connected in a welding mode.

5. The actuator of claim 4, wherein: the lower shell is provided with a first mounting groove, a second mounting groove and a third mounting groove, the axes of the first mounting groove, the second mounting groove and the third mounting groove are arranged in parallel, the driving device and the output gear are mounted in the first mounting groove, the duplex gear is mounted in the second mounting groove, and the actuating mechanism is mounted in the third mounting groove.

6. The actuator of claim 5, wherein: the trapezoid external thread end is provided with a limiting block, and the limiting block is abutted with the third mounting groove when the push rod is in the maximum extension displacement state.

7. The actuator of claim 5, wherein: the end face of the second bevel gear, which is opposite to the third bevel gear, is provided with a first rotating shaft, the end face of the third bevel gear, which is opposite to the second bevel gear, is provided with a second rotating shaft, and the axis of the first rotating shaft and the axis of the second rotating shaft are coincident with the rotating axis of the duplex gear.

8. The actuator of claim 7, wherein: the two ends of the second installation groove are respectively provided with a first shaft seat matched with the first rotating shaft and a second shaft seat matched with the second rotating shaft, the first rotating shaft is carried on the first shaft seat, the second rotating shaft is carried on the second shaft seat, and the second bevel gear and the third bevel gear are suspended in the second installation groove.

9. The actuator of claim 1, wherein: the transmission ratio of the output gear to the first bevel gear is 4-81.

10. The actuator of claim 1, wherein: the output power of the driving device is 3W-50W.