CN107165991B - Reversing mechanism of bidirectional automatic speed-changing motor transmission device - Google Patents

Abstract

The invention provides a reversing mechanism of a bidirectional automatic speed-changing motor transmission device, belonging to the technical field of machinery. The bidirectional automatic variable-speed motor transmission device solves the problems of complex switching process and slow response of the existing bidirectional automatic variable-speed motor transmission device. The connecting gear, the connecting sleeve and the transmission cylinder are sleeved outside the main shaft, the connecting gear is provided with the connecting cylinder, the connecting sleeve is fixed with the connecting cylinder in the circumferential direction, the main shaft is fixed with the transmission cylinder in the circumferential direction, the connecting sleeve is sleeved outside the transmission cylinder, the connecting sleeve is fixed with the transmission cylinder in the axial direction, the connecting sleeve can rotate relative to the transmission cylinder, a guide structure is arranged in the shell, the bottom of the connecting cylinder is provided with a connecting groove in a penetrating mode, and the bottom of the transmission cylinder is provided with a connecting block. It has advantages of simple and sensitive switching process.

Description

Reversing mechanism of bidirectional automatic speed-changing motor transmission device

Technical Field

The invention belongs to the technical field of machinery, relates to a bidirectional automatic speed change motor transmission device, and particularly relates to a reversing mechanism of the bidirectional automatic speed change motor transmission device.

Background

Most of traditional electric tricycles or electric automobiles adopt brushless hub motors, brushless differential motors and excitation motors, but the requirements of the three motors on load, speed and climbing cannot be met. In order to overcome the defects of the various motors in the using process, a bidirectional automatic speed change motor transmission mechanism is used on the electric tricycle, and the bidirectional automatic speed change motor transmission mechanism can realize the forward or backward movement of the electric tricycle through the matching of a one-way chuck, a forward one-way device and a backward one-way device.

The bidirectional automatic speed-changing motor transmission device on the market has various structures, but can obtain the same function. For example, a bidirectional automatic transmission motor transmission device filed by the present applicant [ application No.: 201510424829.9], which comprises a shell, a main shaft and a rotating shaft both axially fixed in the shell, wherein the main shaft is sleeved with an isolator, the isolator comprises an outer ring and an inner ring fixed with the main shaft, the main shaft is fixed with a gear, the outer ring is fixed with a connecting piece, the main shaft is circumferentially fixed with a transmission piece, the rotating shaft drives the outer ring and the gear to rotate simultaneously through a gear mechanism, and the transmission ratio between the rotating shaft and the outer ring is greater than that between the rotating shaft and the gear; when the rotating shaft rotates anticlockwise, the isolator is in a slipping state, and the connecting piece and the transmission piece are linked through a combination mechanism arranged between the connecting piece and the transmission piece; when the rotating shaft rotates clockwise, the connecting piece and the transmission piece are separated and kept in a separated state through a separating mechanism arranged in the shell; when the rotating shaft rotates clockwise at a high speed, the gear and the inner ring are linked through a speed change mechanism arranged between the gear and the inner ring. The bidirectional automatic speed change motor transmission device can well reduce the space occupied by the whole transmission device on the premise of realizing the forward and reverse of the electric tricycle, so that the whole structure becomes simpler.

However, the above-mentioned bidirectional automatic transmission also has some drawbacks: in the bidirectional automatic speed change motor transmission device, a connecting piece is driven by an outer ring through a friction structure to rotate, a combination mechanism comprises a first guide part which is convex in an arc shape on the end surface of the connecting piece, a second guide part which is convex in an arc shape on the end surface of a transmission piece and a first compression spring which is positioned between the other end surface of the transmission piece and a shell, at least two first guide parts are uniformly distributed along the circumferential direction, and a socket for the insertion of the second guide part is formed between every two adjacent first guide parts; the separating mechanism comprises a first guide component and a second guide component, wherein the first guide component separates the connecting piece from the transmission piece, and the first limit piece keeps the connecting piece and the transmission piece in a separated state; when the rotating shaft rotates anticlockwise, namely when the vehicle is reversed, the driving part moves towards the connecting part under the action of the first compression spring, the second guide part is attached to one of the first guide parts, and the second guide part can be completely inserted into a socket formed between the two adjacent first guide parts under the action of the first guide component, so that the connecting part and the driving part are linked; when the rotating shaft rotates clockwise, namely, when the vehicle is sent, the connecting piece rotates anticlockwise, the driving piece moves axially under the action of the first inclined plane of the first guide part and the second inclined plane of the second guide part, the second guide part overcomes the elastic action of the first compression spring and is separated from a socket formed between the first two guide parts, the driving piece is separated from the connecting piece, and the driving piece is supported by the limiting piece after moving for a certain distance, so that the driving piece and the connecting piece are kept in a separated state. This means that this two-way automatic speed change motor transmission switches over when backing a car and send the car unresponsively, take backing a car to switch over to sending a car as an example, the guide part second inserts in the socket when backing a car, that just need to switch over to send the car just earlier and deviate from the socket second, just then can realize the separation through the effect of two inclined planes, this also means that just can not realize switching from the beginning, and after switching over driving medium and connecting piece separation, still need move to certain distance and make locating part fix a position the driving medium and just can keep the detached state, consequently not only lead to unresponsively when switching over, and the switching process is long and loaded down with trivial details.

Disclosure of Invention

The invention aims to provide a reversing mechanism of a bidirectional automatic speed-changing motor transmission device aiming at the problems in the prior art, and the technical problem to be solved is how to make the switching between the car feeding and the reversing simpler and more sensitive.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a two-way automatic variable speed motor drive's mechanism of backing a car, two-way automatic variable speed motor drive include the casing and locate pivot and main shaft in the casing, this mechanism of backing a car is including all overlapping the connecting gear, adapter sleeve and the transmission section of thick bamboo of locating outside the main shaft, can drive connecting gear when the pivot rotates and rotate, be equipped with the adapter sleeve on the connecting gear, adapter sleeve and adapter sleeve circumference are fixed, main shaft and transmission section of thick bamboo circumference are fixed, its characterized in that, the adapter sleeve is outside the transmission section of thick bamboo, adapter sleeve and transmission section of thick bamboo axial fixity and adapter sleeve can rotate for the transmission section of thick bamboo, the casing in be equipped with the guide structure that can drive the adapter sleeve when rotating and reciprocate, the bottom of adapter sleeve run through and be provided with the spread groove, the bottom of transmission section of thick bamboo has the connecting block that can insert or deviate from in the spread groove when the adapter sleeve rotates.

When backing, the connecting block at the bottom of the transmission cylinder is inserted into the connecting groove of the connecting cylinder, the transmission cylinder and the connecting cylinder are linked, the connecting cylinder is fixed on the connecting gear, the connecting gear is driven by the rotating shaft, the transmission cylinder and the main shaft are circumferentially fixed, and then the rotating shaft and the main shaft are linked; when the vehicle is sent, the connecting block at the lower end of the transmission cylinder is separated from the connecting groove of the connecting cylinder, so that the transmission cylinder and the connecting cylinder are separated from each other, and the main shaft and the rotating shaft are ensured not to rotate together.

Taking the switching from reverse to vehicle sending as an example: when backing a car, the pivot rotates along a direction, and the connecting block inserts in the arc spread groove and makes pivot and main shaft rotate together, and the pivot antiport then, and the last connecting gear of main shaft antiport also. Because the connecting sleeve and the connecting cylinder are fixed in the circumferential direction, the connecting sleeve and the connecting gear rotate in the same direction, and then the connecting sleeve moves upwards while rotating in the same direction as the connecting gear under the action of the guide structure. Because the transmission cylinder and the connecting sleeve are axially fixed, the transmission cylinder is pushed upwards by the connecting sleeve, the connecting block at the bottom of the transmission cylinder is separated from the connecting groove at the bottom of the connecting cylinder, the transmission cylinder is separated from the connecting cylinder, and the main shaft and the rotating shaft do not rotate together, so that the switching from backing to car conveying is completed. The switching from the car feeding to the car backing is the reverse of the above process, and the description is omitted.

This two-way automatic speed changing motor transmission's mechanism of backing a car sets up the combination mode of transmission section of thick bamboo and connecting cylinder into the connected block of transmission bobbin base portion and the connected groove's of connecting cylinder base portion the cooperation mode, only needs the adapter sleeve to drive the transmission section of thick bamboo and reciprocates and can realize sending the car and backing a car the switching between at once, and the reaction to the switching becomes more sensitive.

The connecting sleeve is fixed with the connecting cylinder in the circumferential direction and can move up and down while rotating under the matching of the connecting sleeve and the guide structure, the rotating direction of the connecting sleeve is determined by the connecting gear, and the up-and-down movement of the connecting sleeve is determined by the rotating direction of the connecting sleeve, so that the connecting sleeve cannot rotate in the independent reverse direction unless the connecting gear rotates in the reverse direction, the process that the connecting sleeve and the connecting cylinder need to be positioned to keep the switched state just after switching is omitted, and the switching process between the car conveying and the car backing is simpler.

In the reversing mechanism of the bidirectional automatic speed changing motor transmission device, the connecting groove is an arc-shaped groove.

The connecting cylinder is in a rotating state along with the connecting gear, so that a problem exists: when the connecting block is not separated from the connecting groove and the connecting cylinder just rotates to the one end groove wall of the connecting groove and abuts against the side wall of the connecting block, the connecting block is equivalently subjected to lateral acting force applied by the connecting cylinder, so that the connecting block is separated from the connecting groove and is blocked, and the transmission cylinder cannot be normally separated from the connecting cylinder. Consequently need be with the spread groove design for the arc wall, make the connecting block can move along the arc wall again at the in-process of rebound, can avoid so because of the too short condition that breaks away from in the spread groove yet not follow the spread groove when the connecting block leans on with the tip cell wall of spread groove that causes of spread groove, guarantee that the connecting block can break away from in the spread groove smoothly, become more simply and sensitively for making the switching between sending car and backing a car and provide the assurance.

In the reversing mechanism of the bidirectional automatic speed changing motor transmission device, the inclined surface is arranged on one side of the connecting block, which is opposite to the rotating direction of the connecting sleeve when the connecting block is separated from the connecting groove.

The rotation direction of adapter sleeve sets up the inclined plane along deviating from in the connecting block with making the connecting block follow the spread groove one side mutually, when the connecting cylinder rotates the cell wall of spread groove and the contact between the two when the inclined plane contacts just is the line contact, and along with the continuation of connecting cylinder rotates, the cell wall of spread groove just can form the auxiliary force that upwards lifts up the transmission section of thick bamboo with the contact department on inclined plane, break away from in the spread groove smoothly with further guaranteeing the connecting block, make the separation between transmission section of thick bamboo and the connecting cylinder more smooth from this, can not influence the normal separation function of transmission section of thick bamboo and connecting cylinder again when realizing making the switching between sending car and backing a car become simpler and sensitive.

In foretell two-way automatic gear motor transmission's mechanism of backing a car, the casing in be fixed with the uide bushing, the uide bushing overlaps outside the adapter sleeve, guide structure including set up in the spiral guide block of adapter sleeve upper end periphery side and locate the spiral guide slot on the uide bushing inner wall, spiral guide block is located the spiral guide slot, can make the adapter sleeve reciprocate through spiral guide block along the motion of spiral guide slot when the adapter sleeve rotates.

The uide bushing is fixed motionless, when the adapter sleeve passes through the effect of friction structure down along with connecting the gear revolve, the outer spiral guide block in adapter sleeve upper end will move along the inboard spiral guide slot of adapter sleeve, and because the spiral guide slot is spiral setting, so the spiral guide block will order about the adapter sleeve at once to move upwards or move down in the pivoted simultaneously as long as along the spiral guide slot motion, then because adapter sleeve and driving drum axial fixity, consequently will drive the driving drum and upwards or move down, the combination or the breaking away from of driving drum and connecting drum has been realized from this.

And because the reason that the connecting sleeve and the connecting cylinder are fixed in the circumferential direction, the connecting sleeve cannot rotate in the reverse direction unless the connecting gear rotates in the reverse direction, namely, the process that the connecting sleeve and the connecting cylinder need to be positioned to keep the switched state just after switching is saved by using the circumferential fixation, so that the switching between the car conveying and the reversing becomes more sensitive, and the whole switching process is simpler.

In the reversing mechanism of the bidirectional automatic speed-changing motor transmission device, as another technical scheme, a guide sleeve is fixed in the shell and sleeved outside the connecting sleeve, and the guide structure comprises an external thread arranged on the outer peripheral side of the upper end of the connecting sleeve and an internal thread arranged on the inner wall of the guide sleeve.

The connecting sleeve and the guide sleeve form threaded connection through the matching of the external thread and the internal thread, the guide sleeve is fixed, the connecting sleeve naturally moves upwards or downwards while rotating under the action of the threaded connection along with the rotation of the connecting gear under the action of the friction structure, and then the connecting sleeve and the transmission cylinder are axially fixed, so that the transmission cylinder is driven to move upwards or downwards, and the combination or the separation of the transmission cylinder and the connecting cylinder is realized.

And because the reason that the connecting sleeve is fixed with the connecting cylinder in the circumferential direction and the threaded connection is adopted, the connecting sleeve cannot rotate reversely and independently unless the connecting gear rotates reversely, namely, the process that the connecting sleeve and the connecting cylinder need to be positioned to keep the switched state just after switching is saved, so that the switching between the vehicle feeding and the reversing becomes more sensitive and the switching process is simpler.

In the reversing mechanism of the bidirectional automatic speed changing motor transmission device, the lower end surface of the connecting sleeve is abutted against the transmission cylinder, the outer side of the upper end of the transmission cylinder is provided with the annular groove, the clamping spring is arranged in the annular groove, the part of the clamping spring extends out of the annular groove, and the lower end surface of the clamping spring extending out of the annular groove is abutted against the upper end surface of the connecting sleeve.

The lower end face of the connecting sleeve abuts against the transmission cylinder, the lower end face of the clamp spring extending out of the annular groove abuts against the upper end face of the connecting sleeve, the connecting sleeve and the transmission cylinder form axial fixation, and therefore when the connecting sleeve moves up and down through the action of the guide structure, the transmission cylinder can be pushed to move up and down at the same time, reaction time is saved, and sensitivity of switching between car conveying and car backing is improved.

In the reversing mechanism of the bidirectional automatic speed-changing motor transmission device, the connecting sleeve comprises a sleeve body and a connecting ring connected to the lower end of the sleeve body, the transmission cylinder comprises a cylinder body and a base connected to the lower end of the cylinder body, the cylinder body penetrates through the connecting ring and the sleeve body, and the lower end face of the connecting ring is abutted against the upper end face of the base.

The lower end face of the connecting ring is abutted against the upper end face of the base, so that the transmission cylinder can be driven to move downwards at once only by the connecting ring to the time acting force of the base when the connecting sleeve moves downwards, the transmission cylinder is pushed to move upwards by the aid of the clamping spring and the connecting sleeve, the transmission cylinder can be pushed to move upwards and downwards simultaneously when the connecting sleeve moves upwards and downwards, the reaction time during switching between backing and conveying is saved, and the switching sensitivity between conveying and backing is improved.

In the reversing mechanism of the bidirectional automatic speed changing motor transmission device, the guide sleeve is sleeved outside the sleeve body, a friction structure is arranged between the connecting ring and the connecting cylinder, and the lower end surface of the guide sleeve is abutted against the upper end surface of the connecting cylinder.

Set up the friction structure between go-between and connecting cylinder and make to form circumference between connecting cylinder and the adapter sleeve fixed, simultaneously, in order to restrict the stroke that the adapter sleeve upwards moved, support the lower terminal surface of uide bushing on the up end of connecting cylinder, when the adapter sleeve removes the up end of driving ring and the lower terminal surface of uide bushing when leaning on, the adapter sleeve just no longer removes, can avoid the overlength that the adapter sleeve shifts up like this, guarantee that the bonding process of driving cylinder and connecting cylinder can not shift up the overlength because of the adapter sleeve, this reaction time when shortening the switching, make the switching between sending car and backing a car become more simple and sensitive.

In the reversing mechanism of the bidirectional automatic speed changing motor transmission device, the side part of the shell is in threaded connection with the positioning screw, the peripheral side of the guide sleeve is provided with the clamping groove, and the end part of the positioning screw is clamped in the clamping groove.

The end part of the positioning screw is clamped into the clamping groove, so that the guide sleeve is positioned in the shell and cannot rotate, the connecting sleeve can be guaranteed to move up and down through the matching of the spiral guide block and the spiral guide groove when rotating, and finally the transmission cylinder is driven to move up and down to realize the combination and the separation of the main shaft and the rotating shaft.

Compared with the prior art, the reversing mechanism of the bidirectional automatic speed changing motor transmission device utilizes the guide structure to enable the connecting sleeve to move up and down at the same time when the connecting sleeve rotates, and realizes the up-and-down movement of the transmission cylinder by axially fixing the connecting sleeve and the transmission cylinder so as to finally realize the combination or separation between the transmission cylinder and the connecting cylinder, namely, the switching between the car conveying and the reversing is realized, the transmission cylinder moves synchronously along with the connecting sleeve, the process that the connecting sleeve and the connecting cylinder need to be positioned after the switching is just realized so as to keep the state after the switching is also saved, therefore, the sensitivity during the switching is well improved, and meanwhile, the switching process is simpler.

Drawings

FIG. 1 is a schematic diagram of a bi-directional, automatic transmission motor drive.

Fig. 2 is an internal structural view of fig. 1.

Fig. 3 is a schematic view of fig. 2 at partial explosion.

FIG. 4 is a schematic view of a reverse mechanism of the two-way automatic transmission motor transmission according to the first embodiment.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a structural diagram of the connection block embedded in the connection groove in the first embodiment.

Fig. 7 is a schematic structural diagram of the connecting cylinder, the transmission sleeve and the connecting cylinder in the first embodiment.

Fig. 8 is a schematic illustration of the connecting cylinder and drive sleeve of fig. 7 exploded.

FIG. 9 is a schematic sectional front view of a connecting block in a connecting groove according to the first embodiment.

FIG. 10 is a front sectional view of the connecting block lifted by the connecting grooves in the first embodiment.

In the figure, 1, a housing; 2. a rotating shaft; 3. a main shaft; 4. a drive gear; 5. a connecting gear; 6. a connecting cylinder; 6a, connecting grooves; 6b, through holes; 7. connecting sleeves; 7a, a connecting ring; 7b, a sleeve body; 7b1, spiral guide block; 8. a transmission cylinder; 8a, a cylinder body; 8a1, annular groove; 8b, a base; 8b1, connecting block; 8b11, angled face; 9. a friction structure; 10. a guide sleeve; 10a, a spiral guide groove; 10b, a clamping groove; 11. a guide structure; 12. a clamp spring; 13. and (5) positioning the screw.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, 2 and 3, the reversing mechanism of the bidirectional automatic speed-changing motor transmission device comprises a shell 1, a rotating shaft 2 and a main shaft 3 are arranged in the shell 1, the rotating shaft 2 is arranged in parallel with the main shaft 3, the reversing mechanism comprises a driving gear 4 fixed on the rotating shaft 2, and all overlap and establish connecting gear 5, adapter sleeve 7 and transmission cylinder 8 on main shaft 3, drive gear 4 meshes with connecting gear 5 mutually, be fixed with connecting cylinder 6 on connecting gear 5, transmission cylinder 8 forms circumference fixed through splined connection with main shaft 3, adapter sleeve 7 lower extreme is located connecting cylinder 6 and is equipped with the friction structure 9 that can make adapter sleeve 7 pivoted when connecting gear 5 rotates between adapter sleeve 7 lower extreme and connecting cylinder 6, adapter sleeve 7 cover is outside transmission cylinder 8, adapter sleeve 7 and 8 axial fixings of transmission cylinder and adapter sleeve 7 can rotate for transmission cylinder 8.

As shown in fig. 5 and 8, the connection sleeve 7 includes a connection ring 7a and a sleeve body 7b connected to the connection ring 7a, a lower end of the sleeve body 7b is embedded into a central hole of the connection ring 7a, the friction structure 9 is located between the connection ring 7a and the connection cylinder 6, the friction structure 9 includes a positioning groove disposed on an outer peripheral side of the connection ring 7a and a positioning pin and a spring both disposed in the positioning groove, one end of the spring acts on a groove wall of the positioning groove, the other end of the spring acts on the positioning pin, and the positioning pin is pressed against an inner wall of the connection cylinder 6 under an elastic force of the spring. The quantity of constant head tank is at least two and each constant head tank distributes on the periphery side of go-between 7a along circumference, all is equipped with spring and locating pin in every constant head tank.

As shown in fig. 3, 4 and 5, a guide sleeve 10 is sleeved on the upper end of the sleeve body 7b, and a guide structure 11 is arranged between the guide sleeve 10 and the sleeve body 7b of the connecting sleeve 7. The guide structure 11 includes spiral guide blocks 7b1 arranged on the outer periphery of the upper end of the connecting sleeve 7 and spiral guide grooves 10a arranged on the inner periphery of the guide sleeve 10, the number of the spiral guide blocks 7b1 is several, the number of the spiral guide grooves 10a is consistent with that of the spiral guide blocks 7b1, and the spiral guide blocks 7b1 are located in the corresponding spiral guide grooves 10 a. The lower end face of the guide sleeve 10 is abutted against the upper end face of the connecting cylinder 6, a clamping groove is formed in the outer peripheral side of the guide sleeve 10, a positioning screw 13 is connected to the shell 1 in a threaded mode, and the end portion of the positioning screw 13 is inserted into the clamping groove to enable the guide sleeve 10 to be positioned.

As shown in fig. 4, 5, 7 and 8, the transmission cylinder 8 includes a cylinder 8a and a base 8b connected to a lower end of the cylinder 8a, the cylinder 8a is sleeved outside the main shaft 3, the cylinder 8a passes through the connection ring 7a and the sleeve body 7b, and a lower end surface of the connection ring 7a abuts against an upper end surface of the base 8 b. The connecting block 8b1 is convexly arranged on the lower end face of the base 8b, an annular groove 8a1 is formed in the outer side of the upper end of the barrel 8a, a clamp spring 12 is arranged in the annular groove 8a1, the inner edge of the clamp spring 12 is located in the annular groove 8a1, the outer edge of the clamp spring 12 is located outside the annular groove 8a1, and the lower end face of the clamp spring 12 located outside the annular groove 8a1 abuts against the upper end face of the sleeve body 7 b.

As shown in fig. 6 and 7, the connecting cylinder 6 has a connecting groove 6a extending through the bottom thereof, the connecting groove 6a is arc-shaped, the bottom of the base 8b has a protruding connecting block 8b1, the connecting block 8b1 is located in the connecting groove 6a, and one side of the connecting block 8b1 along the clockwise direction of the driving sleeve is provided with an inclined surface 8b 11. The number of connecting grooves 6a is a plurality of, and the bottom of connecting cylinder 6 is equipped with the through-hole 6b that is used for supplying main shaft 3 to pass, and each connecting groove 6a circumference distributes around through-hole 6b, and the quantity of connecting block 8b1 is unanimous and the one-to-one with connecting groove 6 a.

When the rotating shaft 2 rotates clockwise, that is, when the vehicle is fed, the connecting gear 5 engaged with the driving gear 4 on the rotating shaft 2 rotates counterclockwise. Because the friction structure 9 is arranged between the connecting cylinder 6 and the connecting ring 7a, the friction structure 9 can increase the friction force between the connecting cylinder 6 and the connecting ring 7a, and then the connecting ring 7a and the sleeve body 7b are driven to rotate anticlockwise together through the friction force after the connecting cylinder 6 rotates anticlockwise. Since the spiral guide 7b1 outside the sleeve body 7b is located in the spiral guide groove 10a inside the guide sleeve 10 and the guide sleeve 10 is stationary, the connection sleeve 7 is extended upward while rotating by the cooperation of the spiral guide groove 10a and the spiral guide 7b 1.

The upper end face of the sleeve body 7b of the connecting sleeve 7 abuts against the clamp spring 12, the inner edge of the clamp spring 12 is located in the annular groove 8a1 on the cylinder body 8a of the transmission cylinder 8, and the lower end face of the connecting ring 7a of the connecting sleeve 7 abuts against the upper end face of the base 8b of the transmission cylinder 8, which means that the connecting sleeve 7 and the transmission cylinder 8 are axially fixed. Thus, in the process that the connecting sleeve 7 extends upwards while rotating, the connecting sleeve 7 pushes the transmission cylinder 8 upwards so that the transmission cylinder 8 is separated from the connecting gear 5, and the main shaft 3 and the rotating shaft 2 rotate asynchronously.

The connection piece 8b1 at the lower end of the transmission cylinder 8 is disengaged from the connection groove 6a during the process that the transmission cylinder 8 is pushed up, but since the connection cylinder 6 is also in a rotating state during the process that the transmission cylinder 8 is pushed up, there is a case that: when the connecting block 8b1 has not been disengaged from the connecting groove 6a and the connecting cylinder 6 has rotated counterclockwise until the groove wall at one end of the connecting groove 6a abuts against the side wall of the connecting block 8b1, the connecting block 8b1 is subjected to a lateral force applied by the connecting cylinder 6, so that the disengagement of the connecting block 8b1 from the connecting groove 6a is hindered, and the transmission cylinder 8 cannot be disengaged from the connecting cylinder 6 normally. As shown in fig. 9, it is therefore necessary to design the connecting slot 6a as an arc-shaped slot, so that the connecting block 8b1 can move along the arc-shaped slot during the upward movement process, which can avoid the situation that the connecting block 8b1 has not been separated from the connecting slot 6a when the connecting block 8b1 abuts against the end slot wall of the connecting slot 6a due to the connecting slot 6a being too short, ensure that the connecting block 8b1 can be smoothly separated from the connecting slot 6a, and provide a guarantee for making the switching between the car feeding and the car backing simpler and more sensitive. Meanwhile, as shown in fig. 10, an inclined surface 8b11 is arranged on the connecting block 8b1 along the side opposite to the rotating direction of the connecting sleeve 7 when the connecting block 8b1 is disengaged from the connecting groove 6a, when the connecting cylinder 6 rotates counterclockwise until the groove wall of the connecting groove 6a contacts with the inclined surface 8b11, the contact between the two is just line contact, and along with the continuous rotation of the connecting cylinder 6, the contact position between the groove wall of the connecting groove 6a and the inclined surface 8b11 just can form an auxiliary force for lifting the transmission cylinder 8 upwards, so as to further ensure that the connecting block 8b1 can be smoothly disengaged from the connecting groove 6a, and therefore, the disengagement between the transmission cylinder 8 and the connecting cylinder 6 is more smooth.

After the upper end surface of the connecting ring 7a of the connecting sleeve 7 moves upwards to abut against the lower end surface of the guide sleeve 10, the extending distance of the connecting sleeve 7 reaches the maximum value, the transmission cylinder 8 is pushed up to the maximum distance by the connecting sleeve 7, the transmission cylinder 8 rotates only under the friction force of the connecting gear 5, and the spiral guide block 7b1 is matched with the spiral guide groove 10a, so that the connecting sleeve 7 cannot rotate in the reverse direction independently unless the connecting gear 5 rotates in the reverse direction, namely, the process that the connecting sleeve 7 and the connecting sleeve 6 need to be positioned to keep the switched state just after switching is achieved by using the friction structure 9 is saved.

Taking the counterclockwise rotation of the rotating shaft 2 as backing and the clockwise rotation as car feeding as an example, when the rotating shaft 2 rotates counterclockwise, i.e. backing up, the connecting gear 5 engaged with the driving gear 4 on the rotating shaft 2 can rotate clockwise. Also, due to the existence of the friction structure 9, the connecting cylinder 6 can drive the connecting ring 7a and the sleeve body 7b to rotate clockwise after rotating clockwise. And the connecting sleeve 7 moves downwards while rotating due to the matching of the spiral guide block 7b1 and the spiral guide groove 10a, and the connecting sleeve 7 pulls the transmission cylinder 8 downwards under the action of the snap spring 12.

After the connecting block 8b1 at the lower end of the transmission cylinder 8 is pulled into the arc-shaped connecting groove 6a inserted into the bottom of the connecting cylinder 6, because the connecting cylinder 6 is in a rotating state, after the connecting cylinder 6 rotates to the other end groove wall of the arc-shaped connecting groove 6a and abuts against the side wall of the connecting block 8b1, the connecting cylinder 6 forms circumferential fixation with the connecting block 8b1 along the current rotating direction, the connecting cylinder 6 and the transmission cylinder 8 form linkage from this, and therefore the synchronous rotation of the main shaft 3 and the rotating shaft 2 is realized.

This two-way automatic variable speed motor drive's reversing mechanism utilizes guide structure 11 to make adapter sleeve 7 reciprocate at the same time when adapter sleeve 7 rotates, and through with adapter sleeve 7 and the combination or the separation between the adapter sleeve 6 of realizing reciprocating of transmission section of thick bamboo 8 with final realization transmission section of thick bamboo 8 with the combination of realizing between the adapter sleeve 6 with the transmission section of thick bamboo 8 axial fixity, realized promptly and sent the switching between the car and reverse, transmission section of thick bamboo 8 is along with adapter sleeve 7 synchronization motion, saved and just realized that need fix a position the state after the switching with the adapter sleeve 7 with the adapter sleeve 6 after switching again, consequently improved the sensitivity and the stability of switching well.

Example two

In this embodiment, the guiding structure 11 includes an external thread disposed on the outer side of the upper end of the connecting sleeve 7 and an internal thread on the inner wall of the guiding sleeve 10, and the connecting sleeve 7 and the guiding sleeve 10 form a threaded connection through the cooperation of the external thread and the internal thread. The connecting sleeve 7 and the guide sleeve 10 form threaded connection through the matching of external threads and internal threads, the guide sleeve 10 is fixed, when the connecting sleeve 7 rotates along with the connecting gear 5 under the action of the friction structure 9, the connecting sleeve 7 naturally moves upwards or downwards while rotating under the action of threaded connection, and then the connecting sleeve 7 and the transmission cylinder 8 are axially fixed, so that the transmission cylinder 8 is driven to move upwards or downwards, and the combination or separation of the transmission cylinder 8 and the connecting cylinder 6 is realized.

And because of the friction structure 9 between the connecting sleeve 7 and the connecting cylinder 6 and the threaded connection, the connecting sleeve 7 cannot rotate reversely and automatically unless the connecting gear 5 rotates reversely, that is to say, the friction structure 9 is utilized to save the process that the connecting sleeve 7 and the connecting cylinder 6 need to be positioned to keep the switched state just after switching is realized, so that the switching between the vehicle sending and the vehicle backing becomes more sensitive and has higher stability.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (8)

1. A reversing mechanism of a bidirectional automatic speed-changing motor transmission device comprises a shell (1), a rotating shaft (2) and a spindle (3) which are arranged in the shell (1), the reversing mechanism comprises a connecting gear (5), a connecting sleeve (7) and a transmission cylinder (8) which are sleeved outside the spindle (3), the rotating shaft (2) can drive the connecting gear (5) to rotate when rotating, the connecting gear (5) is provided with a connecting cylinder (6), the connecting sleeve (7) is circumferentially fixed with the connecting cylinder (6), the spindle (3) is circumferentially fixed with the transmission cylinder (8), the reversing mechanism is characterized in that the connecting sleeve (7) is sleeved outside the transmission cylinder (8), the connecting sleeve (7) is axially fixed with the transmission cylinder (8) and the connecting sleeve (7) can rotate relative to the transmission cylinder (8), the shell (1) is internally provided with a guide structure (11) which can drive the connecting sleeve (7) to move up and down when the connecting sleeve (7) rotates, the bottom of connecting cylinder (6) run through and be provided with spread groove (6a), the bottom of transmission cylinder (8) has connecting block (8b1) that can insert or deviate from in spread groove (6a) when adapter sleeve (7) rotate, the lower terminal surface of adapter sleeve (7) supports and leans on transmission cylinder (8), the upper end outside of transmission cylinder (6) is equipped with ring channel (8a1), be equipped with jump ring (12) in ring channel (8a1), jump ring (12) part stretches out outside ring channel (8a1), and the lower terminal surface that stretches out outside ring channel (8a1) jump ring (12) supports and leans on the up end of adapter sleeve (7).

2. The reversing mechanism of a bi-directional automatic transmission motor transmission according to claim 1, wherein said connecting slot (6a) is an arc-shaped slot.

3. The reversing mechanism of a bidirectional automatic transmission motor transmission device according to claim 1, wherein the connecting block (8b1) is provided with an inclined surface (8b11) on the side opposite to the rotating direction of the connecting sleeve (7) when the connecting block (8b1) is pulled out from the connecting groove (6 a).

4. The reversing mechanism of the bidirectional automatic speed-changing motor transmission device according to claim 3, wherein a guide sleeve (10) is fixed in the housing (1), the guide sleeve (10) is sleeved outside the connecting sleeve (7), the guide structure (11) comprises a spiral guide block (7b1) arranged on the outer periphery of the upper end of the connecting sleeve (7) and a spiral guide groove (10a) arranged on the inner wall of the guide sleeve (10), the spiral guide block (7b1) is positioned in the spiral guide groove (10a), and when the connecting sleeve (7) rotates, the connecting sleeve (7) can move up and down along the spiral guide groove (10a) through the movement of the spiral guide block (7b 1).

5. The reversing mechanism of the bidirectional automatic speed-changing motor transmission device according to claim 3, wherein a guide sleeve (10) is fixed in the housing (1), the guide sleeve (10) is sleeved outside the connecting sleeve (7), and the guide structure (11) comprises an external thread arranged on the outer periphery of the upper end of the connecting sleeve (7) and an internal thread arranged on the inner wall of the guide sleeve (10).

6. The reversing mechanism of the bidirectional automatic speed-changing motor transmission device according to claim 4 or 5, wherein the connecting sleeve (7) comprises a sleeve body (7b) and a connecting ring (7a) connected to the lower end of the sleeve body (7b), the transmission cylinder (8) comprises a cylinder body (8a) and a base (8b) connected to the lower end of the cylinder body (8a), the cylinder body (8a) penetrates through the connecting ring (7a) and the sleeve body (7b), and the lower end face of the connecting ring (7a) abuts against the upper end face of the base (8 b).

7. The reversing mechanism of the bidirectional automatic speed-changing motor transmission device according to claim 6, wherein the guide sleeve (10) is sleeved outside the sleeve body (7b), a friction structure (9) is arranged between the connecting ring (7a) and the connecting cylinder (6), and the lower end surface of the guide sleeve (10) abuts against the upper end surface of the connecting cylinder (6).

8. The reversing mechanism of the bidirectional automatic speed-changing motor transmission device according to claim 7, wherein a positioning screw (13) is connected to the side of the housing (1) in a threaded manner, a clamping groove (10b) is formed in the outer peripheral side of the guide sleeve (10), and the end of the positioning screw (13) is clamped into the clamping groove (10 b).

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