CN219498378U

CN219498378U - Electronic lock

Info

Publication number: CN219498378U
Application number: CN202223508510.9U
Authority: CN
Inventors: 王超
Original assignee: Changchun Jetty Automotive Parts Co Ltd
Current assignee: Changchun Jetty Automotive Parts Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-08-08
Anticipated expiration: 2032-12-28

Abstract

Disclosed herein is an electronic lock including: a driving device including an output shaft outputting torque; the speed increasing device comprises an annular fixed gear ring, a gear is arranged on the inner periphery of the fixed gear ring, a multistage planetary gear assembly meshed with the gear, and the multistage planetary gear assembly comprises a primary planetary gear assembly, a final planetary gear assembly and at least one middle planetary gear assembly; each stage of the planetary gear assembly comprises a planet carrier, a sun gear and a plurality of planet gears; the output shaft is coaxially connected with a planet carrier of the primary planetary gear assembly; the rod piece is connected with a sun gear of the final planetary gear assembly; the first thread of the rod piece is meshed with the second thread of the lock rod so as to drive the lock rod to reciprocate. The speed-raising device formed by the planetary gear assemblies of the electronic lock has the advantages of small transmission structure size, compact structure, stable motion, larger transmission bearing capacity and high transmission efficiency.

Description

Electronic lock

Technical Field

The utility model relates to the technical field of automobile charging, in particular to an electronic lock.

Background

The charging interface of the new energy automobile is usually provided with a locking device to play a role in fixing the charging gun in the charging process. However, the driving device in the traditional electronic lock greatly consumes electric energy and motor moment due to mutual transmission among transmission mechanisms and friction force generated by changing circular motion into linear motion, which not only leads to too short service life of the electronic lock and easy noise generation, but also easily causes abrasion of a motor gear set and unstable driving device of the electronic lock. Moreover, because the transmission mechanism in the existing electronic lock needs multistage deceleration, the requirement of the speed-up lock cannot be met, and meanwhile, the connection structure of the electronic lock and the lock rod is complex. Accordingly, there is a need to provide a new solution to the above-mentioned problems with electronic locks.

Disclosure of Invention

An object of the present utility model is to provide an electronic lock capable of being assembled in a small space while having a stable structure and a high ejection force.

An electronic lock, comprising:

a driving device including an output shaft outputting torque;

the speed increasing device comprises an annular fixed gear ring, a gear is arranged on the inner periphery of the fixed gear ring, and a multistage planetary gear assembly meshed with the gear;

the multi-stage planetary gear assembly includes a primary planetary gear assembly, a final planetary gear assembly, and at least one intermediate planetary gear assembly connected to the primary planetary gear assembly and the final planetary gear assembly, respectively;

each stage of the planetary gear assembly comprises a planet carrier, a sun gear and a plurality of planet gears, wherein the sun gear and the planet gears are arranged on the planet carrier; the output shaft is coaxially connected with a planet carrier of the primary planetary gear assembly;

a lever connected to the sun gear of the final planetary gear assembly; the rod piece is provided with a first thread;

the lock rod is provided with a second thread matched with the first thread;

the driving device is configured to drive the planetary mechanism in multiple stages, drives the rod piece to rotate, and further drives the lock rod to reciprocate.

Therefore, the multistage planetary gear assembly is arranged to realize multistage speed increasing, and the multistage planetary gear assembly has the advantages of small transmission structure size, compact structure, stable motion, larger transmission bearing capacity and high transmission efficiency.

Preferably, the direction of the reciprocating motion is parallel to the axial direction of the output shaft.

By setting the direction of the reciprocating motion parallel to the axial direction of the output shaft, thereby avoiding loss of output force.

Preferably, the lock rod has a small diameter portion and a large diameter portion, the large diameter portion has a middle accommodating cavity, the second thread is an internal thread arranged at the inner periphery of the accommodating cavity, and the first thread is an external thread arranged at the outer periphery of the rod piece.

Therefore, the lock rod is set to have a hollow cavity, the running space of the rod piece is determined, and the lock rod is separated from the locking position.

Preferably, the internal thread is a double-line internal thread, and the external thread is a double-line external thread.

Therefore, the double-thread has larger thread lead angle, smaller friction force formed by screwing the screw and the nut, is convenient for transmitting power and motion, and designs the internal thread and the external thread into the double-thread.

Preferably, the axis of rotation of the lever is arranged coaxially with the axis of rotation of the planetary gear assembly.

By designing the rotation axis of the lever to be coaxial with the rotation axis of the planetary gear assembly, thereby avoiding loss of output force.

Preferably, the rod is a two-wire screw.

Thus, the lock lever is moved by a simple structure.

Preferably, the rod piece is a cylinder, and a double-line external thread is arranged at the front end of the cylinder.

Thus, the lock rod is moved by providing a double-thread external thread on the cylinder.

Preferably, the length of the double-wire external thread is greater than or equal to the preset movable distance of the lock rod and less than or equal to the length of the accommodating cavity.

Therefore, the length of the double-line external thread is set, and the condition that the lock rod can reach the preset moving distance is achieved.

Preferably, a plurality of the planetary gears and the sun gear are helical gears.

Therefore, the bearing capacity of the gear can be improved due to the increase of the contact ratio of the bevel gears, and the service life of the gear is prolonged, so that the bevel gears with good meshing performance are arranged between the planet gears and the sun gear for transmission.

Preferably, the number of teeth of the planet gear is equal to the number of teeth of the sun gear.

Therefore, the number of teeth of the planetary gears is designed to be equal to the number of teeth of the sun gear, and the transmission of each planetary gear and the sun gear in the ratio of 1 is realized.

Preferably, the output power of the driving device is 0.5W to 35W.

Thus, by calculating the output power, a sufficient output torque can be ensured in this section.

Preferably, the transmission ratio of the driving device and the rod piece is 1/39-1/3.

Thus, the transmission ratio can meet the output speed requirement in this section by calculation.

The utility model has the following beneficial effects:

1. according to the electronic lock, the multistage planetary gear assembly is arranged, the planetary carrier is arranged to be in active transmission, and the plurality of planetary gears meshed with the planetary carrier are arranged around the sun wheel, so that the speed increasing effect is achieved; the transmission structure has small volume, compact structure, stable motion, larger transmission ratio, large bearing capacity and high transmission efficiency.

2. The electronic lock drives the lock rod to reciprocate by screwing in and unscrewing out the rod piece and the lock rod, so that the connection relation of the lock rod is simplified, and the electronic lock is convenient to replace and maintain.

3. According to the electronic lock, the planetary carrier is set to be in active transmission, and the plurality of planetary gears meshed with the planetary carrier are arranged around the sun wheel, so that the speed increasing effect is achieved.

4. The electronic lock of the utility model enables the planet carrier to be used as an input body of the planetary gear assembly of the present stage and realizes the serial connection of the planetary gear assemblies of multiple stages by setting the specific structure of the planet carrier.

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 cross-sectional view of an electronic lock according to the present utility model;

FIG. 2 is a schematic diagram of the operation of the planetary gear assembly of the electronic lock of the present utility model;

FIG. 3 is a schematic structural view of an assembly of a first embodiment of the planet carrier and lever of the electronic lock of the present utility model;

FIG. 4 is a schematic structural view of an assembly of a second embodiment of the planet carrier and lever of the electronic lock of the present utility model;

FIG. 5 is a schematic view of the structure of the electronic lock lever of the present utility model;

the figures are marked as follows:

1-drive, 2-upshift, 21-stationary ring gear, 22-planetary gear assembly, 22 a-primary planetary gear assembly, 22 b-primary planetary gear assembly, 22 c-primary planetary gear assembly,

23-gear, 221-planet carrier, 222-sun gear, 223-planet gear, 224-carrier body,

225-fixed shaft, 226-transmission shaft, 3-rod, 31-first screw thread, 4-lock rod, 41-small diameter part, 42-large diameter part, 43-accommodating cavity, 44-second screw thread.

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 electronic lock includes:

a drive device 1, the drive device 1 including an output shaft outputting torque;

the speed increasing device 2 comprises an annular fixed gear ring 21, a gear 23 arranged on the inner periphery of the fixed gear ring 21 and a multistage planetary gear assembly 22 meshed with the gear 23;

the multi-stage planetary gear assembly 22 includes a primary planetary gear assembly 22a, a final planetary gear assembly 22c, and at least one intermediate planetary gear assembly 22b connected to the primary and final planetary gear assemblies, respectively;

each stage of the planetary gear assembly comprises a planet carrier 221, a sun gear 222 and a plurality of planet gears 223 arranged on the planet carrier 221; the output shaft is coaxially connected with the carrier 221 of the primary planetary gear assembly 22 a;

a lever 3, said lever 3 being connected to the sun gear 222 of the final planetary gear assembly 22c, said lever 3 having a first thread;

a lock rod 4, wherein a second thread 44 matched with the first thread 31 is arranged on the lock rod 4;

the driving device 1 is configured to drive the planetary mechanism in multiple stages, and drives the rod 3 to rotate, so as to drive the lock rod 4 to reciprocate.

The speed increasing device 2 includes a fixed ring gear 21, a gear 23 provided inside the fixed ring gear 21, and a multistage planetary gear assembly 22 provided inside the fixed ring gear 21.

The planetary gear assembly connected to the output shaft of the multi-stage planetary gear assembly 22 is defined as a primary planetary gear assembly 22a, the planetary gear assembly connected to the lever 3 is defined as a final planetary gear assembly 22c, the planetary gear assembly intermediate between the primary planetary gear assembly 22a and the final planetary gear assembly 22c is an intermediate planetary gear assembly 22b, and the number of intermediate planetary gear assemblies 22b is at least 1.

In the present embodiment, the multi-stage planetary gear assembly 22 is a 3-stage planetary gear assembly, i.e., the number of intermediate planetary gear assemblies 22b is 1. Thus, at least 3 steps up can be achieved.

Specifically, each stage of planetary gear assembly includes a planet carrier 221, a sun gear 222, and a plurality of planet gears 223.

The speed increasing principle of the speed increasing device 2 is as follows: the annular gear ring 21 is fixedly arranged, the planet carrier 221 is active, and the sun gear 222 is passive, so that an output shaft of the driving device 1 is connected with the planet carrier 221 of the primary planetary gear assembly 22a, the rod 3 is connected with the sun gear 222 of the final planetary gear assembly 22c, the driving device 1 drives the rod 3 to rotate through the speed increasing device 2, and the rod 3 is meshed with the second thread 44 of the lock rod 4 to drive the lock rod 4 to reciprocate.

In the present embodiment, the transmission sequence of the speed increasing device 2 is: the output shaft of the driving device 1 is connected with a planet carrier 221 of the primary planetary gear assembly 22a to drive the planet carrier 221 to rotate, the planet carrier 221 is connected with a plurality of planet gears 223 to drive the planet gears 223 to rotate, and the planet gears 223 are meshed with a sun gear 222 and a gear 23 to realize the rotation and revolution of the planet gears 223, so that the sun gear 222 is driven to rotate to realize the rotation of the primary planetary gear assembly 22 a; the sun gear of the primary planetary gear assembly 22a is connected to the planet carrier 221 of the intermediate planetary gear assembly 22b such that the planet carrier 221 serves as the input of the present stage, effecting rotation of the intermediate planetary gear assembly 22b, and the sun gear 222 of the intermediate planetary gear assembly 22b is connected to the planet carrier 221 of the final planetary gear assembly 22c effecting rotation of the final planetary gear assembly 22 c.

Specifically, the planet carrier 221 is used as an input body of the present-stage planetary gear assembly, and includes a plurality of fixed shafts 225 and a transmission shaft 226, the plurality of fixed shafts 225 and the transmission shaft 226 are arranged to be disposed at both sides of the carrier body 224, and the plurality of fixed shafts 225 are correspondingly connected with the plurality of planetary gears 223, and the transmission shaft 226 is connected with the sun gear 222 of the next-stage planetary gear assembly.

In this embodiment, the planet carrier body 224 is a triangular plate, the transmission shaft 226 is disposed at the center of the triangular plate, and the axis coincides with the rotation axis of the sun gear 222. At each corner of the triangular plate, 3 fixed shafts 225 are provided, and the axis of the fixed shaft 224 is parallel to the rotation axis of the sun gear.

By setting the specific configuration of the carrier 221, the carrier 221 serves as an input body of the present-stage planetary gear assembly, thereby realizing the series connection of the multistage planetary gear assemblies.

Meanwhile, by setting the planet carrier 221 as active transmission, the plurality of planet gears 223 are respectively meshed with the sun gear 222 and the gear 23, so that the planet gears 223 rotate and revolve, and the planetary gear assembly 22 achieves the function of accelerating; the transmission structure has small volume, compact structure, stable motion, large transmission ratio, large bearing capacity and high transmission efficiency.

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

In another embodiment, the drive device 1 is a hydraulic motor.

Specifically, the lever 3 is rotated by the planetary gear assembly 22, and in order to avoid the loss of the output force, the movement direction of the lever 3 to drive the lock lever 4 is designed to be parallel to the axis direction of the output shaft.

As shown in fig. 3 to 5, the lock lever 4 has a small diameter portion 42 and a large diameter portion 41, the large diameter portion 41 has a middle accommodating chamber 43, the second screw 44 is an internal screw provided on the inner periphery of the accommodating chamber 43, and the first screw 31 is an external screw provided on the outer periphery of the rod 3.

In some embodiments, the lock lever 4 is divided into two parts, one part for the small diameter portion 42 of the lock and unlock, and the other part for the large diameter portion 41 of the second screw thread.

In this embodiment, the large diameter portion 41 has a receiving cavity 43, the inner periphery of the receiving cavity 43 is provided with a second thread 44, the second thread 44 is an internal thread, and the rod 3 is provided with an external thread engaged with the second thread.

Thus, by setting the accommodating cavity of the lock rod 4, the running space of the rod 3 is determined, and the reciprocating motion of the lock rod 4 is realized by the engagement of the internal and external threads.

In the embodiment, the double-thread is utilized, the thread lead angle is larger, the friction force formed by screwing the screw and the nut is smaller, the power and the motion are convenient to transmit, and the internal thread and the external thread are designed into the double-thread.

As shown in fig. 1, the rotation axis of the lever 3 is disposed coaxially with the rotation axis of the planetary gear assembly 22.

In some embodiments the axis of rotation of the lever 3 may be set in any direction, but in this embodiment the axis of rotation of the lever 3 is designed to coincide with the axis of rotation of the planetary gear assembly 22 in order to avoid loss of output force.

As shown in fig. 3, the rod 3 is a two-wire screw.

In the first embodiment, the rod 3 is a standard double-wire screw, one end of which is provided with a hole (not labeled in the figure) for connection with the drive shaft 226.

As shown in fig. 4, the rod 3 is a cylinder, and a double-line external thread is provided at the front end of the cylinder.

In the second embodiment, the rod 3 is a cylinder provided with a double-thread external thread of a sufficient length at one end and a hole (not marked in the figure) for connection with the transmission shaft 226 at the other end.

Preferably, the length of the double-wire external thread is greater than or equal to the preset movable distance of the lock rod 4 and less than or equal to the length of the accommodating cavity.

Specifically, the length of the double-line external thread of the rod 3 is determined by presetting the moving distance of the rod 4, the length of the double-line external thread is greater than or equal to the preset moving distance of the rod 4, and meanwhile, the length of the double-line external thread is smaller than or equal to the length of the accommodating cavity 43 of the rod 4, and the preset moving distance can be met only if the two length limitations are met, and the rod 3 drives the rod 4 to move.

Preferably, a plurality of the planetary gears 223 and the sun gear 222 are helical gears.

Specifically, the planetary gear 223 and the sun gear 222 may be one of cylindrical gears, and in this embodiment, the planetary gear 223 and the sun gear 222 are designed as helical gears.

Preferably, the number of teeth of the planetary gear 223 is equal to the number of teeth of the sun gear 222.

Specifically, the planet gear 223 and the sun gear 222 need to have the same modulus for engagement, but different numbers of teeth can be selected, and the speed increasing effect can be achieved through different transmission ratios.

In the present embodiment, the number of teeth of the planetary gear 223 is designed to be equal to the number of teeth of the sun gear 222.

Preferably, the output power of the driving device 1 is 0.5W to 35W.

Specifically, the output power of the driving device 1 is 0.5W to 35W. The output power of the driving device 1 determines the working speed of the electronic lock, the higher the power is, the faster the electronic lock completes the work, the lower the power is, the slower the electronic lock completes the work, and even the locking work of the lock rod 4 cannot be completed. In order to test the influence of output power on the operation of the electronic lock, the inventor performs relevant tests, the test method is to select driving devices 1 with different output powers, other structures of the electronic lock are the same, each driving device 1 continuously works for 1 minute, the number of times of completing the operation of the electronic lock 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 electronic lock, the electronic lock is regarded as unqualified. The results are shown in Table 1.

Table 1: influence of different output power on electronic lock speed and abnormal sound

Power (W)	0.4	0.5	1	2	4	6	10	15	20	25	30	35	38
														Number of completions	39	40	45	49	53	55	62	67	72	83	90	94	94
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 1, when the output power of the driving device 1 is less than 0.5W, the number of times of switching the electronic lock is completed within 1 minute is less than 40, and the speed is too slow to be unqualified, so the inventor selects the minimum power of the driving device 1 to be 0.5W, when the output power of the driving device 1 is greater than 35W, the electronic lock is affected by the overall design, the speed enters the bottleneck period, no obvious improvement occurs, and meanwhile, abnormal noise occurs, so the output power of the driving device 1 selected by the inventor is 0.5W-35W. Specifically, it may be 0.5W, 1W, 2W, 4W, 6W, 10W, 15W, 20W, 25W, 30W, 35W, etc.

Preferably, the transmission ratio of the driving device 1 and the rod 3 is 1/39-1/3.

Specifically, the transmission ratio of the speed increasing device 2 to the output gear 3 is 1/39-1/3. The ratio=driving wheel rotation speed/driven wheel rotation speed, and it can be seen from the formula that the ratio is inversely proportional to the driven wheel rotation speed, i.e. the smaller the ratio is, the larger the rotation speed of the driven wheel is, the abnormal sound is likely to occur due to inaccurate control. Therefore, the inventor selects different transmission ratios of the driving device 1 and the rod 3 to test, and observes that the number of times of completion of the locking or opening action of the lock rod 4 in 1 minute is less than 40 times, and the number of times is failed, and the abnormal sound is also failed, and the result is shown in table 2.

Table 2: influence of the transmission ratio of the drive 1 and the rod 3 on the speed of the electronic lock

Ratio of transmission

1/2

1/3

1/5

1/6

1/9

1/12

1/18

1/24

1/30

1/36

1/39

1/42

Number of completions

38

41

47

53

61

70

78

83

88

91

94

96

Whether or not to make abnormal sound

Whether or not

Is that

As can be seen from table 2, if the transmission ratio of the driving device 1 to the rod 3 is greater than 1/3, the electronic lock is failed because the locking or unlocking operation completed within 1 minute is less than 40 times; meanwhile, after the transmission ratio of the speed increasing device 2 to the rod piece 3 is smaller than 1/39, abnormal sound can occur to the electronic lock, and the electronic lock is disqualified, so that the inventor selects the transmission ratio of the driving device 1 to the rod piece 3 to be 1/39-1/3.

The working principle of the electronic lock is described in detail below with reference to the accompanying drawings: the motor 1 is started, the output shaft rotates to drive the planet carrier 221 of the primary planet gear assembly 22a to rotate, the planet carrier 221 is driven to rotate a plurality of planet gears 223, the planet gears 223 realize rotation and revolution through meshing with the sun gear 222 and the gear 23, the rotation is transmitted to the sun gear 222 meshed with the planet gears 223, the transmission shaft 226 of the planet carrier 221 of the middle planet gear assembly 22b is connected with the sun gear 222 of the primary planet gear assembly 22a and drives the planet gears 223 of the middle planet gear assembly 22b to rotate, the planet gears 223 realize self-assembly and revolution through meshing with the sun gear 222 and the gear 23, the sun gear 223 is connected with the planet carrier 221 of the final planet gear assembly 22c and drives the planet gears 223 to rotate, the planet gears 223 realize rotation and revolution through meshing with the sun gear 222 and the gear 23, the rotation is transmitted to the sun gear 222 meshed with, the sun gear 222 is connected with the rod 3 to drive the rod 3 to rotate, the first thread 31 of the rod 3 is meshed with the second thread 44 of the rod 4, the rotation is converted into linear motion, and locking or unlocking of the rod 4 is realized.

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 electronic lock, comprising:

a driving device including an output shaft outputting torque;

the lock rod is provided with a second thread matched with the first thread;

the driving device is configured to drive the multistage planetary gear assembly to drive the rod piece to rotate, and then drive the lock rod to reciprocate.

2. The electronic lock of claim 1, wherein the direction of the reciprocation is parallel to an axial direction of the output shaft.

3. The electronic lock of claim 1, wherein the locking bar has a small diameter portion and a large diameter portion, the large diameter portion has a middle receiving cavity, the second thread is an internal thread provided at an inner periphery of the receiving cavity, and the first thread is an external thread provided at an outer periphery of the rod.

4. The electronic lock of claim 3, wherein the internal thread is a double-wire internal thread and the external thread is a double-wire external thread.

5. An electronic lock according to claim 3, wherein the axis of rotation of the lever is arranged coaxially with the axis of rotation of the planetary gear assembly.

6. The electronic lock of claim 5, wherein the lever is a two-wire screw.

7. The electronic lock of claim 5, wherein the lever is a cylinder with a double-threaded external thread at a front end of the cylinder.

8. The electronic lock of claim 7, wherein the length of the double-wire external thread is greater than or equal to a preset movable distance of the locking lever and less than or equal to the length of the receiving cavity.

9. The electronic lock of claim 1, wherein a plurality of the planet gears and the sun gear are helical gears.

10. The electronic lock of claim 9, wherein the number of teeth of the planet gears is equal to the number of teeth of the sun gear.

11. The electronic lock of claim 1, wherein the output power of the driving means is 0.5W to 35W.

12. The electronic lock of claim 1, wherein a transmission ratio of the driving device to the lever is 1/39-1/3.