CN114439862A

CN114439862A - Electric actuator mechanism for controlling clutch device

Info

Publication number: CN114439862A
Application number: CN202210280133.3A
Authority: CN
Inventors: 唐宇阳; 孙亚威; 周思豪
Original assignee: Hepis Technology Shenzhen Co ltd
Current assignee: Hepis Technology Shenzhen Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-05-06

Abstract

The invention relates to an electric actuator mechanism for controlling a clutch device, comprising: the device comprises a telescopic assembly, a cam assembly, a sensing assembly and a driving assembly, wherein the telescopic assembly is pressed towards the retraction direction, the cam assembly is used for switching the telescopic state of the telescopic assembly, the sensing assembly is used for detecting the position of the cam assembly, and the driving assembly is in driving connection with the cam assembly; when the telescopic assembly retracts, the telescopic assembly passively and rapidly moves from the extension position to the retraction position in the cam assembly under the driving of the driving assembly, and the sensing assembly detects the current position of the cam assembly so as to confirm the current state of the telescopic assembly. This application is through the structural feature who utilizes the cam in the cam subassembly for telescopic component can be from the state of stretching out fast switch to the state of retracting, or from the state of retracting fast switch to the state of stretching out, guarantees that the high efficiency is shifted. Through setting up the response subassembly, the accessible detects the position of cam subassembly and learns the flexible state of current flexible subassembly, can do the initialization, and cam subassembly is in an organic whole with a plurality of functions integration, is favorable to the structure miniaturization.

Description

Electric actuator mechanism for controlling clutch device

Technical Field

The invention relates to the technical field of clutch devices, in particular to an electric actuator mechanism for controlling a clutch device.

Background

The clutch device is positioned between the power source (which can be an engine, a motor or a human body and the like) and the gearbox and is used for temporarily separating or gradually engaging the power source and the gearbox so as to cut off the power input to the gearbox. Secondly, the clutch device also has the function of changing the power transmission path in the wave box. The clutch device is generally classified into a mechanical clutch device, an electromagnetic clutch device, a magnetic powder clutch device, a hydraulic clutch device, and the like, among which the mechanical clutch device is most common.

Since the clutch device is a core component of a transmission system and the operating efficiency in frequently and rapidly shifting gears is concerned, the basic requirements for the design of the clutch device are as follows: rapid and stable jointing, rapid and thorough separation, convenient and labor-saving operation, small overall size, small mass, capability of absorbing enough impact energy and other indexes. In the gear shifting process, the clutch device performs locking action and unlocking action through the electric actuator mechanism. In the driving process, the electric actuator mechanism is required to be capable of quickly executing a command, and then the clutch device is controlled to switch between the locking action and the unlocking action, so that the gear shifting efficiency is further improved. However, the motor actuator of the conventional clutch device has a slow execution speed, which affects the operation efficiency of the clutch device.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide an electric actuator mechanism for controlling a clutch device, which is to solve the above-mentioned drawbacks of the prior art, in view of the slow execution speed of the conventional electric actuator mechanism.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electric actuator mechanism for operating a clutch device is constructed, comprising: the cam assembly comprises a telescopic assembly, a cam assembly, a sensing assembly and a driving assembly, wherein the telescopic assembly is pressed towards the retraction direction, the cam assembly is used for switching the telescopic state of the telescopic assembly, the sensing assembly is used for detecting the position of the cam assembly, and the driving assembly is in driving connection with the cam assembly; when the cam module retracts, the telescopic module passively and rapidly moves from the extension position to the retraction position in the cam module under the driving of the driving module, and the sensing module detects the current position of the cam module so as to confirm the current state of the telescopic module.

Further, the cam assembly comprises a cam; the cam is provided with a protruding portion protruding to one side.

Further, a surface of the protruding part is provided with a first profile for accelerating the extension or retraction of the telescopic assembly; the cam is provided with a second profile connected with the first profile.

Further, the protruding portion is disposed at an end of the protruding portion and connected to the first profile; the retraction position is arranged on one surface of the protruding part, which is back to the first profile line; the retracted position is contiguous with the second profile.

Further, the cam assembly also includes a driven wheel disposed coaxially with the cam.

Further, the sensing assembly comprises a fixedly arranged Hall sensor and a magnet arranged on the driven wheel; when the telescopic assembly is in an extended state or a retracted state, the magnets are overlapped with the Hall sensors at corresponding positions.

Further, the driving assembly comprises a motor and a driving wheel arranged at the rotating end of the motor; the driving wheel is in driving connection with the driven wheel.

Further, the telescopic assembly is a driven shaft; the driven shaft is pressed by external force to be kept in contact with the cam.

Furthermore, a rolling piece is arranged at the tail end of the driven shaft; when the cam rotates, the cam surface and the bulge surface are attached to the rolling piece.

Furthermore, a limiting groove is formed in the driven shaft, and a limiting block is arranged in the limiting groove.

The invention has the beneficial effects that: this application is through the structural feature who utilizes the cam in the cam subassembly for telescopic component can be from the state of stretching out fast switch to the state of retracting, or from the state of retracting fast switch to the state of stretching out, guarantees that the high efficiency is shifted. Through setting up the response subassembly, the accessible detects the position of cam subassembly, and then learns the flexible state of current flexible subassembly, can do the initialization, convenient operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:

FIG. 1 is an electric actuator mechanism for operating a clutch device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a cam assembly according to an embodiment of the present invention;

FIG. 3 is a diagram showing the relative positions of the magnet of the cam and the Hall sensor when the driven shaft is in an extended state according to the embodiment of the present invention;

FIG. 4 is a diagram showing the relative positions of the magnet of the cam and the Hall sensor in the retracted state of the driven shaft according to the embodiment of the present invention;

FIG. 5 is a schematic view of a driven shaft of an embodiment of the present invention in an extended state;

FIG. 6 is a schematic view of a driven shaft of an embodiment of the present invention in a retracted state;

fig. 7 is a schematic structural diagram of a driving assembly according to an embodiment of the invention.

In the figure, 1, a telescopic assembly; 2. a cam assembly; 3. a drive assembly; 4. an inductive component; 11. a driven shaft; 12. a rolling member; 13. a sleeve; 14. a first mounting plate; 21. a cam; 22. a projection; 23. an extended position; 24. retracting; 25. a driven wheel; 26. a second mounting plate; 31. a motor; 32. a driving wheel; 33. a motor frame; 41. a Hall sensor; 42. a magnet; 43. a circuit board; 211. a second profile; 212. positioning holes; 221. a first profile line.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made clearly and completely in conjunction with the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

Embodiments of the present invention are illustrated in fig. 1 to 7, and provide an electric actuator mechanism for operating a clutch device, including: the telescopic component 1 is pressed towards the retraction direction, the cam component 2 is used for switching the telescopic state of the telescopic component 1, the sensing component 4 is used for detecting the position of the cam component 2, and the driving component 3 is in driving connection with the cam component 2; during retraction, the retraction assembly 1 is driven by the drive assembly 3 to move rapidly passively from the extended position 23 to the retracted position 24 within the cam assembly 2, and the sensing assembly 4 detects the current position of the cam assembly 2 to confirm the current state of the retraction assembly 1.

The retraction assembly 1 is pressed all the way towards the retraction direction by the clutch means so that contact is maintained between the retraction assembly 1 and the cam assembly 2. When the driving assembly 3 drives, the cam assembly 2 is rotated integrally, and the telescopic assembly 1 is forced to rapidly move from the extension position 23 to the retraction position 24 in the cam assembly 2 or rapidly move from the retraction position 24 to the extension position 23 in the cam assembly 2 due to the contact between the telescopic assembly 1 and the cam assembly 2, so that the telescopic assembly 1 is rapidly retracted or rapidly extended. The sensing assembly 4 detects the current positional relationship of the cam assembly 2 to identify the home position and the current position of the telescopic assembly 1.

This scheme is through the structural feature who utilizes the cam in the cam subassembly for flexible subassembly can be followed the state of stretching out and switched to the withdrawal state fast, or follow the withdrawal state and switch to the state of stretching out fast, guarantees that the high efficiency is shifted. Through setting up the response subassembly, the accessible detects the position of cam subassembly, and then learns the flexible state of current flexible subassembly, can do the initialization, convenient operation.

In a further embodiment, the retraction assembly 1 is a driven shaft 11; the tail end of the driven shaft 11 is provided with a rolling element 12; when the cam 21 rotates, the surface of the cam 21 and the surface of the convex part 22 are jointed with the rolling piece 12. The driven shaft 11 is used for controlling the clutch device to perform locking action or unlocking action. Therefore, there is always a force on the end face of the driven shaft 11, which tends to retract the driven shaft 11, and thus to contact the cam 21, i.e. the rolling elements 12 engage the surface of the cam 21. In the above embodiments, the rolling elements 12 are bearings.

Further, a sleeve 13 is arranged outside the driven shaft 11, and the driven shaft 11 can reciprocate linearly along the sleeve 13, so that the driven shaft 11 can extend or retract. The sleeve 13 is provided with a first mounting plate 14, and the first mounting plate 14 can integrally mount the telescopic assembly on a base of a box or other mechanisms through parts such as screws and the like. The driven shaft 11 may be provided with a mounting bracket (not shown) for mounting the rolling elements.

In a further embodiment, the driven shaft 11 is provided with a limiting groove (not shown), and a limiting block (not shown) is arranged in the limiting groove.

The limiting groove and the limiting block are used for limiting the movement of the driven shaft 11, so that when the cam 21 rotates, the rolling part 12 rolls from the extending position 23 to the retracting position 24 on the cam 21, or rolls from the retracting position 24 to the extending position 23 on the cam 21, and the driven shaft 11 always keeps a rapid linear movement without rotating. Wherein, the spacing groove and the spacing block can adopt the cooperation of keyway and guide key.

In a further embodiment, the cam assembly 2 comprises a cam 21; the cam 21 is provided with a projection 22 projecting to one side. A surface of the projection 22 is provided with a first profile 221 for allowing the telescopic assembly 1 to rapidly pass; the cam 21 is provided with a second profile 211 that meets the first profile 221. The protruding portion 23 is disposed at an end of the protruding portion 22 and connected to the first profile 221; the retracted positions 24 are arranged on the side of the protruding portion 22 facing away from the first profile 221; the retracted position 24 is contiguous with the second profile 211.

As can be seen from the above, the first profile 221 and the second profile 211 are located between the extended position 23 and the retracted position 24 for controlling the telescopic action of the driven shaft 11 in the sleeve 13. The first profile 221 is a high speed section and the second profile 211 is a low speed section, and particularly, when the rolling member 12 rolls along the surface of the cam 21, the rolling member 12 rapidly passes through the first profile 221 regardless of whether the driven shaft 11 performs the extending or retracting motion, thereby allowing the driven shaft 11 to rapidly extend or retract. That is, the first profile 221 may enable rapid extension or retraction of the driven shaft 11.

Wherein, the extension position 23 is provided with an extension position matching contour line, the retraction position 24 is provided with a retraction position matching contour line, and the extension position matching contour line and the retraction position matching contour line are two static positions on the cam 21. The extended mating profile is located at an intermediate position of the extended position 23 and the retracted mating profile is located between the retracted position 24 and the second profile 211. The extension and retraction mating profiles are the starting and ending points, and the extension or retraction of the driven shaft 11 is completed when the rolling elements 12 are located on the extension or retraction mating profiles.

Specifically, as shown in fig. 2, let s be the distance from the center of the cam 21 to the point on the profile, θ be the angle through which the cam 21 rotates, and s be the starting position at which the rolling member 12 rolls on the cam profile₀The end position is s₁。

In the cam rotation process, two different profiles are provided on the cam 21, and when the angle θ rotated by the cam 21 is the same, the profile with a large s-value change amount is defined as a profile with a rapid change, and the profile with a small s-value change amount is defined as a profile with a gradual change. As can be seen from the cam 21 in fig. 2, when the cam 21 rotates, the cam profile changes abruptly with the rotation of the cam 21 at the first profile 221 and changes gently with the rotation of the cam 21 at the second profile 211, as seen from the profile of the cam 21, which can be obtained by reflecting the magnitude of the change of the value s, for example, when the starting position of the rolling element on the cam is s₀10mm, end position s₁50mm rolling members from s₀To s₁In the process, only 30 degrees of rotation are required on the first profile and 100 degrees of rotation are required on the second profile. It follows that, in the case where the angle θ through which the cam 21 rotates is the same, the amount of change in the s value of the first profile 221 is much greater than the amount of change in the s value of the second profile 211, which enables the rolling member 12 to more quickly change from s when on the first profile 221₀To s₁。

In a further embodiment, the cam assembly 2 further comprises a driven wheel 25 arranged coaxially with the cam 21.

The cam 21 and the driven wheel 25 are integrally arranged, so that when the driven wheel 25 is driven by the driving assembly, the driven wheel 25 drives the cam 21 to rotate. The cam 21 is provided with a second mounting plate 26, the second mounting plate 26 fixes the cam 21 and the integrally arranged driven wheel 25 on the cam 21 through a positioning hole 212 on the cam 21, and the cam 21 can only rotate around a rotating shaft connected with the driven wheel 25. Screws may be used to secure the second mounting plate 26 to the base of the case or other mechanism.

In a further embodiment, the driving assembly 3 comprises a motor 31, and a driving pulley 32 disposed at a rotating end of the motor 31; the driving wheel 32 is drivingly connected with the driven wheel 25. The motor 31 is fixed by a motor frame 33.

The motor 31 is a servo motor, and can precisely control the rotation angle of the cam 21. The motor 31 drives the driving wheel 32 to rotate, and the driving wheel 32 drives the driven wheel 25 to rotate, so that the speed is reduced and the torque is increased, and the cam 21 is driven. In the present embodiment, the driving wheel 32 and the driven wheel 25 are both gears, and when the motor 31 is driven, the driving wheel 32 and the driven wheel 25 are in meshing transmission.

In another embodiment, the driving pulley 32 and the driven pulley 25 are sprockets and are driven by a chain.

In another embodiment, the driving pulley 32 and the driven pulley 25 are pulleys and are driven by a belt.

Specifically, when the driven shaft 11 needs to be rapidly extended, the motor 31 drives the driving wheel 32, the driving wheel 32 drives the driven wheel 25 to rotate together with the cam 21, the rolling member 12 rolls along the retraction position 24 on the surface of the cam 21 and sequentially passes through the second profile line 211 and the first profile line 221 to reach the extension position 23, and the driven shaft 11 is rapidly extended. Or, when the driven shaft 11 needs to be retracted quickly, the motor 31 drives the driving wheel 32, the driving wheel 32 drives the driven wheel 25 to rotate together with the cam 21, the rolling element 12 rolls along the extending position 23 on the surface of the cam 21 and sequentially passes through the first profile line 221 and the second profile line 211 to reach the retracted position 24, and the driven shaft 11 is retracted quickly.

In a further embodiment, the sensing assembly 4 comprises a fixedly arranged hall sensor 41, and a magnet 42 arranged on the driven wheel 25; the magnet 42 overlaps the hall sensor 41 at the corresponding position when the telescopic assembly 1 is in the extended state or the retracted state.

Specifically, the hall sensors 41 are fixedly arranged on the circuit board 43, and the hall sensors 41 of the multiple sets of electric actuator mechanisms are arranged on the circuit board 43. The hall sensor 41 is located below the driven wheel 25. As shown in the drawing, in the present embodiment, in one set of the electric actuator mechanism, the number of the hall sensors 41 is 3, and the adjacent 2 hall sensors 41 respectively constitute the extended state and the retracted state of the driven shaft 11. There are 2 magnets 42 on the driven wheel 25. When the driven shaft 11 is in the extended state, 2 magnets 42 overlap with the left and upper 2 hall sensors 41. When the driven shaft 11 is required to be changed from the extended state to the retracted state, the motor 31 drives the driving wheel 32, the driving wheel 32 drives the driven wheel 25 and the cam 21 to rotate counterclockwise, the magnet 42 is disengaged from the 2 hall sensors 41 on the left side, and when the rolling member 12 rolls along the extension position 23 on the surface of the cam 21 and sequentially passes through the first profile line 221 and the second profile line 211 to reach the retracted position 24, the 2 magnets 42 on the driven wheel 25 are respectively overlapped with the 2 hall sensors 41 on the upper side and the right side. When 2 magnets 42 on the driven wheel 25 overlap 2 hall sensors 41, the overall control circuit can detect whether the driven shaft 11 is currently in the extended state or the retracted state.

Through the cooperation of the magnet on the driven wheel and the Hall sensor below the driven wheel, the original position of the driven shaft and the current position can be confirmed. Furthermore, through setting up first profile, can let the driven shaft stretch out fast or retract, guarantee the high efficiency and shift gears. The driven wheel, the cam and the magnet are integrated into a whole, so that the structure miniaturization is facilitated.

In another embodiment, if there are more positions of the cam 21 to stop, more corresponding hall sensors 41 can be disposed below the corresponding positions.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. An electric actuator mechanism for controlling a clutch device, characterized in that: the method comprises the following steps: the cam assembly comprises a telescopic assembly, a cam assembly, a sensing assembly and a driving assembly, wherein the telescopic assembly is pressed towards the retraction direction, the cam assembly is used for switching the telescopic state of the telescopic assembly, the sensing assembly is used for detecting the position of the cam assembly, and the driving assembly is in driving connection with the cam assembly; when the cam module retracts, the telescopic module passively and rapidly moves from the extension position to the retraction position in the cam module under the driving of the driving module, and the sensing module detects the current position of the cam module so as to confirm the current state of the telescopic module.

2. The electric actuator mechanism of claim 1, wherein the cam assembly comprises a cam; the cam is provided with a protruding portion protruding to one side.

3. The electric actuator mechanism of claim 2, wherein a surface of the projection defines a first profile for accelerating extension or retraction of the retraction assembly; and the cam is provided with a second profile connected with the first profile.

4. The electric actuator mechanism of claim 3, wherein the extended position is disposed at an end of the projection and interfaces with the first profile; the retraction position is arranged on one surface of the protruding part, which is back to the first profile line; the retracted position is connected with the second profile.

5. The electric actuator mechanism of claim 2, wherein the cam assembly further comprises a driven wheel disposed coaxially with the cam.

6. The electric actuator mechanism of claim 5, wherein the sensing assembly includes a fixedly disposed Hall sensor, and a magnet disposed on the driven wheel; when the telescopic assembly is in an extended state or a retracted state, the magnets are overlapped with the Hall sensors at corresponding positions.

7. The electric actuator mechanism of claim 5, wherein the drive assembly includes a motor, and a drive pulley disposed at a rotational end of the motor; the driving wheel is in driving connection with the driven wheel.

8. The electric actuator mechanism of claim 2, wherein the telescoping assembly is a driven shaft; the driven shaft is pressed by external force to be kept in contact with the cam.

9. The electric actuator mechanism of claim 8, wherein the driven shaft is provided with a rolling member at a rear end thereof; when the cam rotates, the cam surface and the bulge surface are attached to the rolling piece.

10. The electric actuator mechanism according to claim 8, wherein the driven shaft is provided with a limiting groove, and a limiting block is arranged in the limiting groove.