CN117570191A - Electric control gear shifting actuator - Google Patents
Electric control gear shifting actuator Download PDFInfo
- Publication number
- CN117570191A CN117570191A CN202311601266.7A CN202311601266A CN117570191A CN 117570191 A CN117570191 A CN 117570191A CN 202311601266 A CN202311601266 A CN 202311601266A CN 117570191 A CN117570191 A CN 117570191A
- Authority
- CN
- China
- Prior art keywords
- gear shifting
- screw rod
- shaft
- push rod
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000010354 integration Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses an electric control gear shifting actuator which comprises a screw rod, a push rod, a driving source, a gear shifting shaft and joint teeth. The push rod is coaxially arranged at one end of the screw rod. The driving source is connected with the screw rod and is used for driving the screw rod to rotate and move left and right along the axis of the screw rod. The gear shifting shaft sleeve is arranged on the push rod, the inner wall of the gear shifting shaft is arranged at intervals with the outer part of the push rod, an annular mounting groove is formed in the inner wall of the gear shifting shaft, a push disc is arranged at the end part of the push rod, and the push disc can slide left and right and is positioned in the mounting groove. The plurality of engaging teeth are sleeved on the gear shifting shaft along the axial interval of the gear shifting shaft and can be combined with the external combining internal teeth of different gears. The electric control gear shifting actuator can meet the gear shifting requirement of a multi-gear electric wheel and improve the stability and the integration level of a gear shifting mechanism.
Description
Technical Field
The invention relates to the technical field of electric control gear shifting of transmission parts, in particular to an electric control gear shifting actuator.
Background
At present, more and more manufacturers push out a two-gear or even multi-gear gearbox or an electric drive axle, but most of the existing manufacturers adopt an external electric control screw rod or worm and gear structure to drive the joint teeth or the synchronizer to move so as to realize gear conversion. Electric wheels of electric vehicles with special purposes such as military and engineering machinery also have the requirement of gear change, however, the electric wheels are limited by insufficient space in the wheels, and a gear shifting device used by an electric drive axle or an electric drive gearbox is difficult to use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the electric control gear shifting actuator which can meet the gear shifting requirement of a multi-gear electric wheel and improve the stability and the integration level of a gear shifting mechanism.
In order to achieve the above object, the present invention is realized by the following technical scheme: an electrically controlled shift actuator comprising:
a screw rod;
the push rod is coaxially arranged at one end of the screw rod;
the driving source is connected with the screw rod and used for driving the screw rod to rotate and move left and right along the axis of the screw rod;
the gear shifting shaft is sleeved on the push rod, the inner wall of the gear shifting shaft is arranged at intervals with the outer part of the push rod, an annular mounting groove is formed in the inner wall of the gear shifting shaft, a push disc is arranged at the end part of the push rod, and the push disc can slide left and right and is positioned in the mounting groove;
the plurality of engaging teeth are sleeved on the gear shifting shaft along the axial interval of the gear shifting shaft and can be combined with the combined internal teeth of different gears.
Further, the driving source comprises a shell fixing seat, a direct current brushless motor, an external spline and a screw nut, wherein the direct current brushless motor is fixed in the shell fixing seat, a motor shaft of the direct current brushless motor is a hollow shaft, the motor shaft and the screw rod are coaxially arranged, an internal spline is arranged in the motor shaft, the screw nut is fixed on the shell fixing seat, the end part of the screw rod is provided with the external spline, the screw rod penetrates through the screw nut and then is inserted into the shell, the external spline is meshed with the internal spline, and the internal spline can slide in the motor shaft along the axial direction of the motor shaft.
Further, the driving source further comprises an anti-derailing structure, the anti-derailing structure is connected with the motor shaft in a switching mode, and the motor shaft can be tightly held and fixed under the condition of power failure.
Further, the gear-off prevention structure comprises a power-off brake and a rotating disc, the rotating disc is sleeved and fixed outside the motor shaft, the power-off brake is fixed in the shell fixing seat, and when the current of the power-off brake is disconnected, the friction disc of the power-off brake can be pressed on the rotating disc under the action of a spring.
Further, a sensor is arranged on the direct current brushless motor.
Further, the novel push rod is characterized by further comprising two thrust bearings, wherein the two thrust bearings are sleeved on the push rod, positioned in the mounting groove and supported on the side wall of the mounting groove.
Further, the mounting groove also comprises a check ring, and the check rings are arranged on two end faces of the mounting groove along the axial direction.
Further, the gear shifting device also comprises a needle bearing, wherein the needle bearing is sleeved on the push rod and is supported on the inner wall of the gear shifting shaft
The invention has the beneficial effects that:
the electric control gear shifting actuator comprises a screw rod, a push rod, a driving source, a gear shifting shaft and engaging teeth. The push rod is coaxially arranged at one end of the screw rod. The driving source is connected with the screw rod and is used for driving the screw rod to rotate and move left and right along the axis of the screw rod. The gear shifting shaft sleeve is arranged on the push rod, the inner wall of the gear shifting shaft is arranged at intervals with the outer part of the push rod, an annular mounting groove is formed in the inner wall of the gear shifting shaft, a push disc is arranged at the end part of the push rod, and the push disc can slide left and right and is positioned in the mounting groove. The plurality of engaging teeth are arranged, the diameters of the plurality of gear shifting shafts are different, the gear shifting shafts are sleeved at intervals along the axial direction of the gear shifting shafts, and the engaging teeth can be combined with the external engaging internal teeth of different gears.
When the gear shifting device is used, when the driving source is started, the driving screw rod rotates and simultaneously moves forwards or backwards, and then the gear shifting shaft and the gear shifting shaft can be driven to move forwards or backwards, so that the engaging teeth are engaged or combined with the engaging internal teeth of different gears, and gear shifting is realized.
By adopting the electric control gear shifting actuator, the screw rod can convert smaller torque into larger axial thrust, so that the engagement teeth are pushed to shift gears. In addition, in the implementation, the push rod can be made into an elongated rod, so that the driving source can be placed outside the electric wheel or the electric drive axle, and the push rod goes deep inside, thereby being beneficial to the arrangement of the whole machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a schematic illustration of an electrically controlled shift actuator according to an embodiment of the present invention;
FIG. 2 is a schematic view of the interior of a shift shaft of the electrically controlled shift actuator of FIG. 1;
reference numerals:
100. a screw rod; 200. a push rod; 210. pushing the disc; 300. a driving source; 310. a housing fixing seat; 320. a DC brushless motor; 330. an external spline; 340. a screw nut; 350. an anti-derailment structure; 351. a power-off brake; 352. a rotating disk 353, a friction disk; 400. a shift shaft; 500. engagement teeth; 600. a thrust bearing; 700. a retainer ring; 800. needle roller bearings.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Referring to fig. 1 to 2, the present invention provides an electrically controlled shift actuator including a lead screw 100, a push rod 200, a driving source 300, a shift shaft 400, and engagement teeth 500. The push rod 200 is coaxially disposed at one end of the screw 100. The driving source 300 is connected to the screw 100 for driving the screw 100 to rotate while moving left and right along the axis thereof. The gear shift shaft 400 is sleeved on the push rod 200, the inner wall of the gear shift shaft 400 is arranged at intervals with the outer part of the push rod 200, an annular mounting groove is formed in the inner wall of the gear shift shaft 400, a push disc 210 is arranged at the end part of the push rod 200, and the push disc 210 can slide left and right and is positioned in the mounting groove. The plurality of engagement teeth 500 are sleeved on the shift shaft 400 at intervals along the axial direction of the shift shaft 400, and can be combined with external combination internal teeth of different gears.
When the driving source 300 is started, the driving screw 100 is driven to rotate and simultaneously advance or retreat, so that the gear shifting shaft 400 and the advance or retreat on the gear shifting shaft 400 can be driven, and the engagement teeth 500 are engaged or combined with the combined internal teeth of different gears, so that gear switching is realized.
With this electrically controlled shift actuator, the lead screw 100 can convert a small torque into a large axial thrust force, thereby pushing the engagement teeth 500 to shift gears. In addition, in the implementation, the push rod 200 can be made into an elongated rod, so that the driving source 300 can be placed outside the electric wheel or the electric drive axle, and the push rod 200 is deep inside, which is beneficial to the arrangement of the whole machine.
In the present embodiment, the driving source 300 includes a housing fixing base 310, a brushless dc motor 320, an external spline 330, and a lead screw nut 340. The brushless dc motor 320 is fixed in the housing holder 310. The motor shaft of the brushless DC motor 320 is a hollow shaft, the motor shaft and the screw rod 100 are coaxially arranged, an internal spline is arranged in the motor shaft, and a screw rod nut 340 is fixed on the housing fixing seat 310. The end of the screw rod 100 is provided with an external spline 330, the screw rod 100 is inserted into the housing after passing through a screw rod nut 340, the external spline 330 is meshed with the internal spline, and the internal spline can slide along the axial direction in the motor shaft.
After the brushless dc motor 320 is started, the screw rod 100 is driven to rotate by matching the external spline 330 and the internal spline, and the screw rod 100 slides along the axial direction of the screw rod 100 under the action of the screw rod nut 340 and the internal and external splines 330 while rotating, so that the push rod 200 can be pushed to move left and right.
As a preferred embodiment, the driving source 300 further includes a gear-releasing preventing structure 350, and the gear-releasing preventing structure 350 is connected to the motor shaft, and can clamp and fix the motor shaft under the condition of power failure, thereby preventing gear-releasing.
In particular, anti-gear-out structure 350 includes a power-off brake 351 and a rotating disk 352. The rotating disc 352 is sleeved and fixed outside the motor shaft, and the power-off brake 351 is a power-off brake 351 commonly used in the prior art. The power-off brake 351 is fixed in the shell fixing seat 310, under the condition of electrifying, the friction disc 353 is in a separated state with the rotating disc 352, when the current of the power-off brake 351 is disconnected, under the action of a spring, the friction disc 353 of the power-off brake 351 can be pressed on the rotating disc 352 under the action of the spring, so that the braking effect is achieved.
The brushless dc motor 320 is provided with a sensor. The sensor can further test the moving distance of the screw rod 100, thereby further guaranteeing the moving precision of the whole device. In general, a hall sensor may be preferable.
In a preferred embodiment, the gear shifter further comprises two thrust bearings 600, wherein the two thrust bearings 600 are sleeved on the push rod 200, are positioned in the mounting groove, and are supported on the side wall of the mounting groove.
The thrust bearing 600 can separate the shift shaft 400 from the push rod 200, prevent the shift shaft 400 from rotating along with the push rod 200, and at the same time, the thrust bearing 600 has high axial load bearing capacity, and can protect the push plate 210 and the shift shaft 400. In practice, shift shafts 400 may be provided on both the left and right sides of push plate 210.
As a more preferable embodiment, the present shifter further includes a retainer 700, and both end surfaces of the mounting groove in the axial direction are provided with the retainer 700. The axial force can be further born.
In addition, the needle bearing 800 may be sleeved on the push rod 200, and the needle bearing 800 may be connected between the push rod 200 and the inner wall of the shift shaft 400. Needle bearings 800 can withstand large radial pressures and support the push rod 200.
The electric control gear shifting actuator comprises:
the motor shaft of the brushless dc motor 320 is a hollow rotating member and is connected to the screw rod 100 through the internal and external splines 330, and the internal and external splines 330 can slide along the axial direction, and can be used for combining with different gears through the engaging teeth 500 on the gear shift shaft 400 and combining with the internal teeth.
The screw rod 100 is driven to rotate by the dc brushless motor 320, and converts the rotational motion of the push rod 200 into the axial motion under the action of the inner and outer spline and the screw nut 340. When the power-off brake 351 is not electrified, the motor shaft can be braked, so that the phenomenon of slip gear is prevented.
In addition, since the push rod 200 is an elongated rod, the driving source 300 may be placed outside the electric wheel or the electric drive axle, so that the push rod 200 is deep inside.
In addition, the shift shaft 400 can be prevented from rotating along with the push rod 200 by the thrust bearing 600, and meanwhile, the thrust bearing 600 has high load bearing capacity, so that the push plate 210 and the shift shaft 400 can be protected; in the specific implementation, the pushing disc 210 may be disposed on both the left and right sides; in addition, needle bearing 800 can withstand large radial pressures and support pushrod 200.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. An electrically controlled shift actuator, comprising:
a screw rod;
the push rod is coaxially arranged at one end of the screw rod;
the driving source is connected with the screw rod and used for driving the screw rod to rotate and move left and right along the axis of the screw rod;
the gear shifting shaft is sleeved on the push rod, the inner wall of the gear shifting shaft is arranged at intervals with the outer part of the push rod, an annular mounting groove is formed in the inner wall of the gear shifting shaft, a push disc is arranged at the end part of the push rod, and the push disc can slide left and right and is positioned in the mounting groove;
the plurality of engaging teeth are sleeved on the gear shifting shaft along the axial interval of the gear shifting shaft and can be combined with the combined internal teeth of different gears.
2. The electrically controlled gear shifting actuator of claim 1, wherein the driving source comprises a housing fixing seat, a brushless dc motor, an external spline and a screw nut, the brushless dc motor is fixed in the housing fixing seat, a motor shaft of the brushless dc motor is a hollow shaft, the motor shaft is coaxially arranged with the screw rod, an internal spline is arranged in the motor shaft, the screw nut is fixed on the housing fixing seat, an external spline is arranged at the end of the screw rod, the screw rod is inserted into the housing after passing through the screw nut, the external spline is meshed with the internal spline, and the internal spline can axially slide in the motor shaft.
3. The electrically controlled shift actuator of claim 2, wherein the drive source further comprises an anti-derailment structure, the anti-derailment structure being adapted to be coupled to the motor shaft to enable the motor shaft to be secured in a hugging state in the event of a power failure.
4. The electrically controlled gear shifting actuator of claim 3, wherein the gear-shift preventing structure comprises a power-off brake and a rotating disc, the rotating disc is sleeved and fixed outside the motor shaft, the power-off brake is fixed in the shell fixing seat, and when the power-off brake is powered off, a friction disc of the power-off brake can be pressed on the rotating disc under the action of a spring.
5. The electrically controlled shift actuator of claim 4, wherein the dc brushless motor is provided with a sensor.
6. The electrically controlled shift actuator of claim 1, further comprising two thrust bearings, wherein two of said thrust bearings are sleeved on said push rod and positioned within said mounting slot and supported on a side wall of said mounting slot.
7. The electrically controlled shift actuator of claim 6, further comprising a retainer ring, wherein the mounting groove is provided with retainer rings on both end surfaces in the axial direction.
8. The electrically controlled shift actuator of claim 3, further comprising a needle bearing sleeved on the pushrod and supported on an inner wall of the shift shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311601266.7A CN117570191A (en) | 2023-11-27 | 2023-11-27 | Electric control gear shifting actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311601266.7A CN117570191A (en) | 2023-11-27 | 2023-11-27 | Electric control gear shifting actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117570191A true CN117570191A (en) | 2024-02-20 |
Family
ID=89860541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311601266.7A Pending CN117570191A (en) | 2023-11-27 | 2023-11-27 | Electric control gear shifting actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117570191A (en) |
-
2023
- 2023-11-27 CN CN202311601266.7A patent/CN117570191A/en active Pending
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