CN109404435B - Transmission mechanism of bidirectional automatic variable speed motor - Google Patents
Transmission mechanism of bidirectional automatic variable speed motor Download PDFInfo
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- CN109404435B CN109404435B CN201811552715.2A CN201811552715A CN109404435B CN 109404435 B CN109404435 B CN 109404435B CN 201811552715 A CN201811552715 A CN 201811552715A CN 109404435 B CN109404435 B CN 109404435B
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
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Abstract
The application provides a transmission mechanism of a bidirectional automatic variable speed motor, and belongs to the technical field of machinery. The novel transmission mechanism solves the problems that an existing transmission mechanism is not smooth in switching and the running stability of a vehicle is insufficient. The novel roller bearing comprises a main shaft, an inner ring circumferentially fixed on the main shaft and an outer ring sleeved outside the inner ring, wherein a plurality of rollers are arranged between the outer ring and the inner ring, a yielding section and a combining section II positioned at one side of the yielding section are arranged at the outer side of the inner ring where each roller is positioned, when the rotating speed of the inner ring is higher than that of the outer ring, the rollers are positioned at the yielding section and enable the inner ring to slide with the outer ring, a combining section I is arranged at the other side of the yielding section, the rollers can circumferentially fix the inner ring and the outer ring when positioned at the combining section I or the combining section II, and the rollers can be driven to move to the combining section I or the combining section II when the outer ring rotates. The switching device has the advantages of smooth switching, good running stability of the vehicle and the like.
Description
Technical Field
The application belongs to the technical field of machinery, relates to a bidirectional automatic speed change motor, and particularly relates to a transmission mechanism of the bidirectional automatic speed change motor.
Background
The bidirectional automatic speed-changing motor is applied to the electric tricycle, and realizes the forward or backward movement of the electric tricycle through the cooperation of structures such as a unidirectional chuck and the like, but the structural parts are scattered and occupy too much space. Therefore, the inventor provides a bidirectional automatic speed changing motor transmission device with the application number of 201520526628.5, and the transmission device distributes all parts of the whole structure on a main shaft line, so that gaps among all parts are reduced, and occupied space is reduced. However, this transmission device has a problem that the assembly accuracy of the separating mechanism related to forward and reverse operation is extremely high, and the use safety is liable to occur. In order to solve the problem, the applicant subsequently proposes a bidirectional automatic variable speed motor transmission device with the application number of 20162087779. X, however, the transmission device has the defects of unstable power transmission combination and poor working stability when in reverse driving after use.
Therefore, the inventor further improves the technical scheme, and provides a transmission mechanism of a bidirectional variable speed motor with the application number of 201711098512.6, which comprises a main shaft, an inner ring sleeved outside the main shaft and circumferentially fixed with the main shaft, an outer ring sleeved outside the inner ring, and a combination sleeve sleeved outside the main shaft, wherein a unidirectional structure is arranged between the inner ring and the outer ring, a disengaging structure which enables the combination sleeve to move away from the outer ring when the outer ring rotates is arranged between the combination sleeve and the outer ring, the transmission mechanism also comprises a first elastic member which enables the combination sleeve to approach the outer ring, a combination piece and a second elastic member are arranged between the inner ring and the outer ring, and the combination piece can be driven to move against the elasticity of the second elastic member and circumferentially fix the inner ring and the outer ring when the combination sleeve approaches the outer ring. The transmission mechanism is used for only disengaging the combining sleeve from the combining structure, is not used as a combined main structure when the vehicle is in a reverse gear, avoids the unstable combination condition caused by combining by utilizing the guiding part on the disengaging structure, simultaneously enables the combining sleeve to rotate circumferentially and axially move relative to the main shaft, and utilizes the combining sleeve, the combining piece and the elastic piece to realize power transmission by circumferentially fixing the inner ring and the outer ring when the vehicle is in the reverse gear without considering the requirement of the disengaged structure, and enables the combination of the inner ring and the outer ring to be more stable and the transmission to be more reliable.
When the automobile is designed, the inclined plane is arranged on the combining piece, the inclined plane is arranged on the outer side of the lower end of the combining sleeve, and when the automobile is reversed, the inclined plane on the outer side of the lower end of the combining sleeve just abuts against the inclined plane of the combining piece and is matched with the elastic force of the first elastic piece to move the combining piece inwards and combine the inner ring and the outer ring together, so that the function can be smoothly realized under the elastic force of the second elastic piece on the inclined plane on the combining piece each time. However, in the actual use process, the situation that the lower end of the combining sleeve directly falls down to collide with the upper end surface of the inner ring during reversing can occur because the elastic force is uncontrollable, so that the inclined plane of the combining member is not at the lower end of the combining sleeve under the elastic force of the elastic member II in the multiple switching process, and the vehicle shake and unsmooth reversing can be caused, and the running stability of the vehicle is affected.
Disclosure of Invention
The application aims to solve the problems in the prior art, and provides a transmission mechanism of a bidirectional automatic variable speed motor, which aims to solve the technical problems of smoother switching of a vehicle and improvement of the running stability of the vehicle.
The aim of the application can be achieved by the following technical scheme:
the transmission mechanism of the bidirectional automatic speed change motor comprises a main shaft, an inner ring circumferentially fixed on the main shaft and an outer ring sleeved outside the inner ring, wherein a plurality of rollers are arranged between the outer ring and the inner ring, a yielding section and a combination section II positioned at one side of the yielding section are arranged at the outer side of the inner ring, when the rotating speed of the inner ring is higher than that of the outer ring, the rollers are positioned at the yielding section and enable the inner ring and the outer ring to slide mutually.
When the transmission mechanism of the bidirectional automatic speed change motor works, the outer ring continuously receives the transmitted power, and the main shaft outputs the power. When the vehicle moves forward at a low speed, the outer ring rotates anticlockwise at a low speed, the outer ring drives the rollers to move to the second position of the combining section, the inner ring and the outer ring are circumferentially fixed through the rollers, and the power of the outer ring is directly transmitted to the main shaft through the inner ring to output power; when the vehicle advances at a high speed, the power is transmitted to the main shaft by a second gear transmission mechanism on the bidirectional variable speed motor, the power is output through the high-speed rotation of the main shaft, at the moment, the inner ring rotates at a high speed anticlockwise along with the main shaft, the outer ring still rotates at a low speed anticlockwise, the rotating speed of the inner ring is higher than that of the outer ring, and the roller is positioned at a yielding section on the outer side of the inner ring so as to enable the inner ring and the outer ring to slide; when the vehicle is reversed, the outer ring rotates clockwise, the outer ring drives the rollers to move to the position of the joint section, the inner ring and the outer ring are fixed circumferentially through the rollers, and the power of the outer ring is directly transmitted to the main shaft through the inner ring so that the main shaft rotates clockwise.
In the transmission mechanism of the bidirectional automatic variable speed motor, the combining section II is arranged on the outer side of the inner ring, the combining section I is additionally arranged on the basis of the yielding section, a structure similar to a bidirectional device is formed between the inner ring and the outer ring by a traditional isolator structure, when a vehicle is reversed, the outer ring drives the roller to move to the combining section I to directly fix the outer ring and the inner ring together in the circumferential direction, compared with the prior art, the mechanism for realizing the combination of the outer ring and the inner ring by utilizing the elastic force, the reversing switching is smoother and more stable, the problem that the vehicle can not normally reverse switching due to insufficient elastic force or the fact that the position of the elastic force is not in place is solved, and the running stability of the vehicle is well improved.
In the transmission mechanism of the bidirectional automatic variable speed motor, the main shaft is sleeved with the combination sleeve, the outer ring and the combination sleeve are provided with the disengaging structure, the outer ring enables the combination sleeve to move far away from the outer ring along the disengaging structure when the outer ring can drive the roller to rotate towards the first moving direction of the combination section, the outer ring is internally provided with the connecting disc and is provided with the positioning structure between the outer ring and the outer ring, the outer ring drives the connecting disc to rotate, the roller is positioned on the connecting disc, the inner ring is provided with the arc-shaped connecting hole, the lower end of the combination sleeve penetrates through the connecting disc and is inserted into the connecting hole, and the inner ring can rotate relative to the combination sleeve to drive the connecting disc to rotate after the roller is positioned at the abdication section.
Specifically, when the vehicle is going forward at a low speed, the outer ring drives the connecting disc to rotate to the position of the roller at the second connecting section through the positioning structure; when the vehicle advances at a high speed, the rotating speed of the inner ring is higher than that of the outer ring, the inner ring rotates to a roller at a yielding section relative to the combining sleeve through the arc-shaped connecting hole, the inner ring and the outer ring slide, then the side part of the lower end of the combining sleeve is propped against the side wall of the connecting hole to enable the inner ring and the connecting disc to form circumferential fixation along the high-speed rotating direction of the inner ring, the inner ring drives the connecting disc to overcome the action of the positioning structure and rotate at a high speed, and the connecting disc and the outer ring slide relatively and simultaneously the roller rotates along with the connecting disc; when the vehicle is reversed, the combining sleeve moves away from the outer ring under the action of the disengaging structure, the lower end of the combining sleeve is separated from the connecting hole, the connecting disc and the inner ring are not fixed in the circumferential direction through the lower end of the combining sleeve, and therefore the outer ring drives the connecting disc to rotate through the positioning structure, and the roller moves to the position of the combining section to connect the inner ring and the outer ring in the circumferential direction so that the main shaft rotates clockwise. Through the arrangement of the structure, the inner ring and the outer ring can be directly fixed together in the circumferential direction when the vehicle is driven forward or backed at a low speed, and meanwhile, the relative slip of the inner ring and the outer ring is realized, so that the running stability of the vehicle is well improved.
In the transmission mechanism of the bidirectional automatic variable speed motor, the outer side of the connecting disc is downwards provided with the positioning part, the outer side of the inner ring is provided with the yielding groove, the first connecting section, the yielding section and the second connecting section are all positioned on the bottom wall of the yielding groove, the positioning part is inserted into the yielding groove and can move along the yielding groove, the positioning part is provided with the clamping groove, and the roller is arranged in the clamping groove.
The inner ring is provided with the abdication groove outside, the first combination section, the abdication section and the second combination section are positioned on the bottom wall of the abdication groove, the positioning part is inserted into the abdication groove and can move along the abdication groove, the roller is arranged in the clamping groove on the positioning part, the connecting disc can move along the abdication groove with the roller, when the roller can realize the combination of the inner ring and the outer ring when the vehicle advances at a low speed and the slip of the inner ring and the outer ring when the vehicle advances at a high speed, the roller can also realize the combination of the inner ring and the outer ring when backing, the process that the inner ring and the outer ring are combined when backing is cancelled by utilizing elasticity in the prior art, and the running stability of the vehicle is improved.
In the transmission mechanism of the bidirectional automatic variable speed motor, the first combining section and the second combining section are two convex cambered surfaces positioned on the same circumference, and the abdicating section is a straight surface or a V-shaped surface connected between the two convex cambered surfaces.
The first combining section and the second combining section are arranged as two convex cambered surfaces positioned on the same circumference, the yielding section is arranged as a straight surface or a V-shaped surface connected between the two convex cambered surfaces, so that when the connecting disc rotates to the second combining section or the first combining section of the yielding groove, the rollers can be ensured to combine the inner ring and the outer ring, thereby directly realizing low-speed forward or reverse running of the vehicle and improving the running stability of the vehicle; when the inner ring rotates at high speed to enable the positioning part to be positioned at the yielding section of the yielding groove, the vertical distance from the yielding section to the inner wall of the outer ring is larger than the outer diameter of the roller because the yielding section is a straight surface or a V-shaped surface connected between the two convex cambered surfaces, so that the inner ring and the outer ring can be smoothly separated to realize high-speed forward movement of the vehicle.
In the transmission mechanism of the bidirectional automatic variable speed motor, the abdication groove comprises an arc groove arranged on the upper end face of the inner ring and an arc notch arranged on the outer side of the inner ring and communicated with the arc groove, and the positioning part is positioned in the arc groove and the roller part stretches into the arc notch.
The groove of stepping down is including setting up in the arc wall of inner ring up end and setting up in the inner ring outside and the arc breach that is linked together with the arc wall, and the location portion on the linking dish can insert the arc wall from top to bottom in and location portion can remove along the arc wall when the assembly like this, stretches into in the arc breach through roller part simultaneously and makes the roller can directly realize the circumference rotation of inner ring and outer loop and be connected when the vehicle backs a car to improve the stability of vehicle operation.
In the transmission mechanism of the bidirectional automatic variable speed motor, the positioning structure comprises at least one magnetic block embedded on the top wall of the inner side of the outer ring, and the connecting disc is adsorbed on the outer ring through the magnetic block.
When the outer ring rotates along the advancing direction of the vehicle, the lower end of the combining sleeve passes through the connecting disc and is inserted into the upper end face of the inner ring, and at the moment, the outer ring and the connecting disc overcome the attraction force of the magnetic block to form relative rotation; when the outer ring rotates along the backward direction of the vehicle, the combining sleeve is far away from the outer ring under the action of the disengaging structure, the lower end of the combining sleeve is retracted into the connecting disc, and at the moment, circumferential connection is formed between the outer ring and the connecting disc through the magnetic force of the magnetic block, so that the connecting disc can drive the roller to move to one position of the combining section to directly and circumferentially rotate and connect the outer ring and the inner ring together, and the running stability of the vehicle is improved.
In the above-mentioned transmission mechanism of the bi-directional automatic variable speed motor, as another technical scheme, the positioning structure includes a plurality of raised heads arranged on the top wall of the inner side of the outer ring and a plurality of grooves circumferentially arranged on the upper end face of the connecting disc, the raised heads have the same shape as the grooves and elasticity, the number of raised heads is less than that of the grooves, and each groove is continuously distributed and is in arc transition between two adjacent grooves.
When the outer ring rotates along the advancing direction of the vehicle, the lower end of the combining sleeve passes through the connecting disc and is inserted into the upper end face of the inner ring, and at the moment, the outer ring and the connecting disc are continuously extruded through the grooves through the convex heads to form relative rotation; when the outer ring rotates along the backward direction of the vehicle, the combining sleeve is far away from the outer ring under the action of the disengaging structure, the lower end of the combining sleeve is retracted into the connecting disc, and at the moment, circumferential connection is formed between the outer ring and the connecting disc through the matching of the raised heads and the grooves, so that the connecting disc can drive the rollers to move to the combining section to directly and circumferentially rotate and connect the outer ring and the inner ring together, and the running stability of the vehicle is improved.
In the transmission mechanism of the bidirectional automatic variable speed motor, the connecting disc is provided with the connecting hole in a penetrating way, the connecting sleeve comprises a matching ring and a sleeve, the main shaft penetrates through the sleeve and the matching ring is limited outside the sleeve in the axial direction, the disengaging structure is arranged between the upper end of the outer ring and the lower end of the matching ring, the lower end of the sleeve is provided with the pin, and the pin penetrates through the connecting hole and is inserted into the connecting hole.
The coupling sleeve comprises a coupling ring and a sleeve, wherein the main shaft penetrates through the sleeve, the coupling ring is axially limited outside the sleeve, the disengaging structure is arranged between the upper end of the outer ring and the lower end of the coupling ring, pins at the lower end of the sleeve penetrate through coupling holes in the coupling disc and are inserted into the connecting holes, the coupling ring moves away from the outer ring under the action of the disengaging structure when the outer ring rotates in the reversing direction, and the sleeve moves away from the outer ring along with the coupling ring due to the fact that the coupling ring is axially limited on the sleeve, so that the pins at the lower end of the sleeve are separated from the connecting holes, and the outer ring can drive rollers to move to the position of the coupling section along the yielding groove through the coupling disc, so that the inner ring and the outer ring are directly connected in a circumferential rotation manner through the rollers, and the running stability of a vehicle is improved.
In the transmission mechanism of the bidirectional automatic variable speed motor, the main shaft is provided with the second gear transmission structure, the second gear transmission structure is circumferentially fixed with the main shaft, the upper end of the second gear transmission structure is provided with a plurality of positioning convex blocks, the inner ring is provided with a plurality of positioning holes which are the same as the positioning convex blocks in number and correspond to the positioning convex blocks one by one in a penetrating way, and each positioning convex block is respectively embedded into the corresponding positioning hole.
Generally, the inner ring is optionally integrally formed on the second gear transmission structure, but in this way relatively large vibrations are generated during operation of the vehicle. Therefore, when in actual assembly, the inner ring is only sleeved on the main shaft, and a plurality of positioning convex blocks at the upper end of the second gear transmission structure are embedded into corresponding positioning holes on the inner ring, so that the inner ring and the second gear transmission structure are circumferentially fixed, and meanwhile, the inner ring and the main shaft are circumferentially fixed due to the fact that the second gear transmission structure and the main shaft are circumferentially fixed, vibration can be reduced, and running stability of a vehicle can be improved to a certain extent.
Compared with the prior art, the transmission mechanism of the bidirectional automatic variable speed motor is provided with the second combining section and the first combining section on the basis of the yielding section outside the inner ring, so that a structure similar to a bidirectional device is formed between the inner ring and the outer ring by the traditional isolator structure, the roller can move to the first combining section under the drive of the connecting disc to directly rotationally connect the outer ring and the inner ring in the circumferential direction when the vehicle backs a car, compared with the prior art that the outer ring and the inner ring are combined by utilizing elasticity, the reversing switching is smoother and stable, the problem that the vehicle cannot normally reverse the car due to insufficient elasticity or the fact that the position of the elastic force is not in place is solved, and the running stability of the vehicle is well improved.
Drawings
Fig. 1 is a schematic diagram of a transmission mechanism of the present bidirectional automatic transmission motor.
Fig. 2 is an exploded view of the transmission mechanism of the present bidirectional automatic transmission motor in the first embodiment.
Fig. 3 is an exploded view of the transmission mechanism of the present bi-directional automatic transmission motor in another angle in the first embodiment.
Fig. 4 is a schematic bottom view of the outer ring, inner ring and rollers of the first embodiment when the vehicle is traveling at low speed.
Fig. 5 is a schematic bottom view of the outer ring, inner ring and rollers of the first embodiment when the vehicle is traveling at a high speed.
Fig. 6 is a schematic bottom view of the outer ring, inner ring and rollers of the first embodiment when the vehicle is reversed.
FIG. 7 is a schematic illustration of the connection of the outer ring to the coupling disc in accordance with one embodiment.
Fig. 8 is a schematic view of the inner ring in the first embodiment.
In the figure, 1, a main shaft; 2. an inner ring; 2a, a yielding groove; 2a1, arc-shaped grooves; 2a11, joining segment one; 2a12, a second combination section; 2a13, a yielding section; 2a2, an arc-shaped notch; 2b, connecting holes; 2c, positioning holes; 3. an outer ring; 4. a roller; 5. a coupling plate; 5a, a positioning part; 5b, a coupling hole; 6. a combining sleeve; 7. a release structure; 8. a mating ring; 9. a sleeve; 9a, pins; 10. a magnetic block; 11. a second gear transmission structure; 11a, positioning bumps; 12. and a positioning ring.
Detailed Description
The following are specific embodiments of the present application and the technical solutions of the present application will be further described with reference to the accompanying drawings, but the present application is not limited to these embodiments.
Example 1
As shown in fig. 1, 2 and 3, the transmission mechanism of the bidirectional automatic variable speed motor comprises a main shaft 1, an inner ring 2 and a combination sleeve 6, wherein the inner ring 2 and the combination sleeve 6 are all sleeved on the main shaft 1, an output gear is fixed on the main shaft 1, the inner ring 2 is in a circular ring shape, the inner ring 2 is circumferentially fixed with the main shaft 1, an outer ring 3 in a circular ring shape is sleeved outside the inner ring 2, a unidirectional structure is arranged between the inner ring 2 and the outer ring 3, and the unidirectional structure comprises a plurality of yielding grooves 2a arranged on the outer side of the inner ring 2 along the circumferential direction and rollers 4 arranged in the yielding grooves 2 a. A disengagement structure 7 is provided between the coupling sleeve 6 and the outer ring 3, which is capable of moving the coupling sleeve 6 away from the outer ring 3 when the outer ring 3 rotates in the reverse direction (the specific structure of the disengagement structure 7 can refer to a bidirectional automatic speed change motor transmission device disclosed in application No. 20162087779. X, and the disengagement structure 7 in the patent is capable of moving the coupling sleeve 6 away from the outer ring 3 when the outer ring 3 rotates in the forward direction, but the principle is the same, and the disengagement structure 7 can be applied to a transmission mechanism only by reversely designing the disengagement structure 7 in actual design), and the transmission mechanism further comprises an elastic member capable of enabling the coupling sleeve 6 to have a tendency to approach the outer ring 3.
As shown in fig. 2 and 3, the combining sleeve 6 comprises a matching ring 8 and a sleeve 9, the spindle 1 passes through the sleeve 9 and the matching ring 8 is axially limited outside the sleeve 9, a spring seat is fixed at the upper end of the spindle 1 close to the sleeve 9, an annular step is arranged on the inner side wall of the sleeve 9, an elastic piece is a spring, the spring is sleeved on the spindle 1, the spring part stretches into the sleeve 9, two ends of the spring act on the annular step and the spring seat respectively, the disengaging structure 7 is arranged between the upper end of the outer ring 3 and the lower end of the matching ring 8, and the specific connection relation of the sleeve, the spring and the spring seat can refer to a transmission mechanism of the automatic speed change motor disclosed by application number 201711099388.5.
As shown in fig. 2, a second gear transmission structure 11 is disposed on the main shaft 1 (the specific structure of the second gear transmission structure 11 can refer to the transmission mechanism of the automatic speed-changing motor disclosed in application number 201711099388.5, which is related to the second gear transmission structure 11 proposed by the inventor, so that the second gear transmission structure 11 is not described in detail in the present application), the second gear transmission structure 11 is circumferentially fixed with the main shaft 1, the inner ring 2 abuts against the second gear transmission structure 11, a plurality of positioning protrusions 11a are disposed at the upper end of the second gear transmission structure 11, a plurality of positioning holes 2c which are the same as the positioning protrusions 11a and are in one-to-one correspondence are disposed on the inner ring 2 in a penetrating manner, and each positioning protrusion 11a is respectively embedded into the corresponding positioning hole 2c, so that the inner ring 2 and the main shaft 1 are circumferentially fixed.
As shown in fig. 3 and 4, the outer ring 3 is connected with the coupling disc 5 through the positioning structure in a circumferential rotation manner, specifically, the positioning structure comprises at least one magnetic block embedded on the inner top wall of the outer ring 3, the outer diameter of the coupling disc 5 is smaller than the inner diameter of the outer ring 3, the upper end surface of the coupling disc 5 is adsorbed on the inner top wall of the outer ring 3 through the magnetic block 10, so that the outer ring 3 can drive the coupling disc 5 to rotate through the suction force of the magnetic block 10 when no external force exists, and meanwhile, when a large rotating force is applied to the coupling disc 5, the coupling disc 5 can overcome the suction force of the magnetic block 10 and rotate relative to the outer ring 3. The rollers 4 are positioned on the coupling disc 5, the coupling disc 5 can drive the rollers 4 to move along the corresponding yielding grooves 2a, the bottom wall of each yielding groove 2a is provided with a first connecting section 2a11, and when the vehicle is reversed, the outer ring 3 can drive the coupling disc 5 to rotate until the rollers 4 are positioned at the first connecting section 2a11 of the corresponding yielding groove 2a, and the inner ring 2 and the outer ring 3 are connected in a circumferential rotation manner through the rollers 4.
As shown in fig. 2, 3 and 7, specifically, the coupling disc 5 is located above the inner ring 2, a plurality of downward positioning portions 5a are provided at the outer edge of the coupling disc 5 along the circumferential direction, the number of the positioning portions 5a is the same as that of the yielding grooves 2a and corresponds to one, each positioning portion 5a is inserted into a corresponding yielding groove 2a on the inner ring 2, each positioning portion 5a can move along a corresponding yielding groove 2a, a clamping groove is provided on each positioning portion 5a in a penetrating manner, and each roller 4 is provided in the clamping groove of the positioning portion 5 a. As shown in fig. 8, each of the relief grooves 2a includes an arc groove 2a1 disposed on an upper end surface of the inner ring 2 and an arc notch 2a2 disposed outside the inner ring 2 and in communication with the arc groove 2a1, each of the arc grooves 2a1 is circumferentially disposed on the upper end surface of the inner ring 2, the positioning portion 5a is disposed in the arc groove 2a1, and the roller 4 partially extends into the arc notch 2a 2.
As shown in fig. 4, 5, 6 and 7, the upper end surface of the inner ring 2 is provided with an arc-shaped connecting hole 2b, the lower end of the combining sleeve 6 passes through the coupling disc 5 and is inserted into the connecting hole 2b, the lower end of the combining sleeve 6 can move along the connecting hole 2b, and when the vehicle advances at a low speed, the outer ring 3 drives the coupling disc 5 to rotate to the roller 4 to combine the inner ring 2 with the outer ring 3; when the vehicle is advanced at a high speed, the inner ring 2 rotates to the roller 4 relative to the coupling disc 5 through the connecting hole 2b so that the inner ring 2 and the outer ring 3 slide, and the inner ring 2 can drive the coupling disc 5 to overcome the magnetic force of the magnetic block 10 and slide relative to the outer ring 3. In this embodiment, the number of the connection holes 2b is several, and each connection hole 2b is circumferentially distributed, a plurality of connection holes 5b are penetratingly provided on the connection disc 5, a plurality of pins 9a are provided at the lower end of the sleeve 9, the number of the pins 9a, the connection holes 2b and the connection holes 5b are all the same and correspond to each other one by one, and each pin 9a passes through a corresponding connection hole 5b and is inserted into a corresponding connection hole 2 b.
As shown in fig. 4, 5, 6 and 8, the bottom wall of each yielding groove 2a is circumferentially provided with a second coupling section 2a12 and a yielding section 2a13, the yielding section 2a13 is connected between the first coupling section 2a11 and the second coupling section 2a12, when the roller 4 is located at the second coupling section 2a12, the inner ring 2 and the outer ring 3 form circumferential rotation connection, and when the roller 4 is located at the yielding section 2a13, the inner ring 2 and the outer ring 3 slide. In this embodiment, the first coupling segment 2a11, the second coupling segment 2a12 and the yielding segment 2a13 are all located on the arc-shaped groove 2a1, the first coupling segment 2a11 and the second coupling segment 2a12 are two convex cambered surfaces located on the same circumference, and the yielding segment 2a13 is a V-shaped surface connected between the two convex cambered surfaces.
When the transmission mechanism of the bidirectional automatic speed change motor works, the outer ring 3 with teeth on the outer side continuously receives the transmitted power, and the main shaft 1 outputs the power through the output gear.
As shown in fig. 4, when the vehicle is switched to advance at a low speed, the outer ring 3 receives the transmission power and rotates at a low speed anticlockwise, the outer ring 3 drives the coupling disc 5 to rotate at a low speed anticlockwise through the attraction force of the magnetic block 10, at this time, the disengaging structure 7 does not act, the pin 9a at the lower end of the coupling sleeve 6 passes through the coupling hole 5b on the coupling disc 5 and is inserted into the connecting hole 2b on the inner ring 2, and the coupling sleeve 6 drives the coupling disc 5 to rotate anticlockwise until the roller 4 is positioned between the coupling section two 2a12 and the inner wall of the outer ring 3, so that the outer ring 3 and the inner ring 2 are fixed in a circumferential direction through the roller 4, and the inner ring 2 rotates at a low speed anticlockwise along with the outer ring 3, thereby the vehicle advances at a low speed.
As shown in fig. 5, when the vehicle is shifted to a high-speed forward motion, the power is transmitted to the main shaft 1 by the second-gear transmission mechanism, and the power is output by rotating the main shaft 1 counterclockwise at a high speed. At this time, the inner ring 2 rotates at a high speed along with the spindle 1 in a counterclockwise direction, the outer ring 3 still rotates at a low speed in a counterclockwise direction, so that the rotation speed of the inner ring 2 is greater than that of the outer ring 3 and the coupling disc 5, and the relative rotation between the inner ring 2 and the coupling disc 5 occurs while the pins 9a move a distance along the coupling holes 2b because the coupling holes 2b are arc-shaped. When the inner ring 2 rotates anticlockwise until the pin 9a abuts against the other side wall of the connecting hole 2b, the connecting disc 5 and the inner ring 2 are circumferentially fixed together in the anticlockwise direction, and meanwhile, the roller 4 is positioned between the abdication section 2a13 and the inner wall of the outer ring 3, so that the inner ring 2 drives the connecting disc 5 to rotate anticlockwise at a high speed against the suction force of the magnetic block 10, and meanwhile, the inner ring 2 and the outer ring 3 slide relatively.
As shown in fig. 6, when the vehicle is shifted to reverse gear, the outer ring 3 receives power to rotate clockwise while pushing the coupling sleeve 6 to move away from the outer ring 3 by the disengaging structure 7. At this time, the roller 4 is located at the position of the abdication section 2a13, the outer ring 3 and the inner ring 2 are in a slipping state, then the combining sleeve 6 is lifted up, so that each pin 9a at the lower end of the combining sleeve 6 is retracted into the corresponding coupling hole 5b on the coupling disc 5, and the lower end of each pin 9a abuts against the upper end face of the inner ring 2, the outer ring 3 drives the coupling disc 5 to rotate clockwise through the attraction force of the magnet 10, so that the coupling disc 5 drives the roller 4 to move between the combining section one 2a11 and the inner wall of the outer ring 3, the roller 4 re-combines the outer ring 3 and the inner ring 2, and the outer ring 3 drives the inner ring 2 and the spindle 1 fixed circumferentially with the inner ring 2 to rotate clockwise and output power.
In the transmission mechanism of the bidirectional automatic speed change motor, the combination section II 2a12 and the abdication section 2a13 are arranged on the outer side of the inner ring 2, the combination section I2 a11 is additionally arranged, a structure similar to a bidirectional device is formed between the inner ring 2 and the outer ring 3 by a traditional isolator structure, when a vehicle is reversed, the roller 4 can be driven by the connecting disc 5 to move to the combination section I2 a11 to directly connect the outer ring 3 with the inner ring 2 in a circumferential rotation way, compared with the prior art that the outer ring 3 and the inner ring 2 are combined by utilizing elasticity, the reversing switching is smoother and stable, the problem that the reversing switching of the vehicle cannot be normally carried out due to insufficient elasticity or the fact that the position of the elastic force is not in place is solved, and the running stability of the vehicle is well improved.
Example two
The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the first coupling segment 2a11 and the second coupling segment 2a12 are two convex cambered surfaces located on the same circumference, and the abdicating segment 2a13 is a straight surface connected between the two convex cambered surfaces.
Example III
The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the positioning structure includes a plurality of protruding heads disposed on the top wall of the inner side of the outer ring 3 and a plurality of grooves disposed on the upper end surface of the coupling disc 5 along the circumferential direction, the protruding heads have the same shape as the grooves and elasticity, the number of protruding heads is less than that of the grooves, each groove is continuously distributed, and the adjacent two grooves form an arc transition.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the application. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the application or exceeding the scope of the application as defined in the accompanying claims.
Claims (6)
1. The transmission mechanism of the bidirectional automatic speed change motor comprises a main shaft (1), an inner ring (2) circumferentially fixed on the main shaft (1) and an outer ring (3) sleeved outside the inner ring (2), wherein a plurality of rollers (4) are arranged between the outer ring (3) and the inner ring (2), a yielding section (2 a 13) and a second connecting section (2 a 12) positioned at one side of the yielding section (2 a 13) are arranged at the outer side of the inner ring (2) where each roller (4) is positioned, when the rotating speed of the inner ring (2) is higher than that of the outer ring (3), the rollers (4) are positioned at the yielding section (2 a 13) and enable the inner ring (2) to slide with the outer ring (3), the other side of the yielding section (2 a 13) is provided with a first connecting section (2 a 11), the rollers (4) are positioned at the first connecting section (2 a 11) or the second connecting section (2 a 12) to enable the inner ring (2) to be circumferentially fixed with the outer ring (3), the rollers (4) can be driven to move to the first connecting section (2 a 11) or the second connecting section (2 a 12) when the outer ring (3) rotates, the outer ring (3) is provided with a connecting structure between the outer ring (6) and the outer ring (3), the outer ring (3) rotates along the direction capable of driving the roller (4) to move towards the first connecting section (2 a 11), the disengaging structure (7) enables the connecting sleeve (6) to move away from the outer ring (3), the connecting disc (5) is arranged in the outer ring (3), a positioning structure capable of enabling the outer ring (3) to drive the connecting disc (5) to rotate is arranged between the two connecting discs, the roller (4) is positioned on the connecting disc (5), the inner ring (2) is provided with an arc-shaped connecting hole (2 b), the lower end of the connecting sleeve (6) penetrates through the connecting disc (5) and is inserted into the connecting hole (2 b), the inner ring (2) can rotate relative to the connecting sleeve (6) until the roller (4) is positioned at the position-giving section (2 a 13), then drives the connecting disc (5) to rotate, the positioning part (5 a) is downwards arranged at the outer side of the connecting disc (5), the outer side of the inner ring (2) is provided with a position-giving groove (2 a), the position-giving section (2 a 13) and the two connecting sections (2 a 12) are respectively positioned on the positioning groove (5 a) along the two positioning grooves (5 a), the positioning groove (1) can be arranged on the main shaft (2 a), the two-gear transmission structure (11) is circumferentially fixed with the main shaft (1), a plurality of positioning convex blocks (11 a) are arranged at the upper end of the two-gear transmission structure (11), a plurality of positioning holes (2 c) which are the same as the positioning convex blocks (11 a) in number and correspond to each other one by one are arranged on the inner ring (2) in a penetrating mode, and the positioning convex blocks (11 a) are respectively embedded into the corresponding positioning holes (2 c).
2. The transmission mechanism of the bi-directional automatic transmission motor according to claim 1, wherein the first coupling segment (2 a 11) and the second coupling segment (2 a 12) are two convex cambered surfaces located on the same circumference, and the yielding segment (2 a 13) is a straight surface or a V-shaped surface connected between the two convex cambered surfaces.
3. The transmission mechanism of the bidirectional automatic speed changing motor according to claim 2, wherein the yielding groove (2 a) comprises an arc groove (2 a 1) arranged on the upper end face of the inner ring (2) and an arc notch (2 a 2) arranged on the outer side of the inner ring (2) and communicated with the arc groove (2 a 1), the positioning part (5 a) is positioned in the arc groove (2 a 1), and the roller (4) partially stretches into the arc notch (2 a 2).
4. A transmission mechanism of a bi-directional automatic speed changing motor according to claim 1, 2 or 3, wherein the positioning structure comprises at least one magnet (10) embedded in the top wall of the inner side of the outer ring (3), and the coupling disc (5) is adsorbed on the outer ring (3) through the magnet (10).
5. The transmission mechanism of the bidirectional automatic speed changing motor according to claim 1, 2 or 3, wherein the positioning structure comprises a plurality of raised heads arranged on the top wall of the inner side of the outer ring (3) and a plurality of grooves circumferentially arranged on the upper end face of the connecting disc (5), the raised heads are the same as the grooves in shape and have elasticity, the number of the raised heads is less than that of the grooves, and each groove is continuously distributed and is in arc transition between two adjacent grooves.
6. The transmission mechanism of a bidirectional automatic speed changing motor according to claim 1, wherein the connecting disc (5) is provided with a connecting hole (5 b) in a penetrating manner, the connecting sleeve (6) comprises a matching ring (8) and a sleeve (9), the main shaft (1) penetrates through the sleeve (9) and the matching ring (8) is axially limited outside the sleeve (9), the disengaging structure is arranged between the upper end of the outer ring (3) and the lower end of the matching ring (8), the lower end of the sleeve (9) is provided with a pin (9 a), and the pin (9 a) penetrates through the connecting hole (5 b) and is inserted into the connecting hole (2 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811552715.2A CN109404435B (en) | 2018-12-18 | 2018-12-18 | Transmission mechanism of bidirectional automatic variable speed motor |
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| CN201811552715.2A CN109404435B (en) | 2018-12-18 | 2018-12-18 | Transmission mechanism of bidirectional automatic variable speed motor |
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| CN109404435B true CN109404435B (en) | 2023-09-05 |
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| CN109404435A (en) | 2019-03-01 |
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