CN212775511U - Gear selecting and shifting actuating mechanism of transmission - Google Patents
Gear selecting and shifting actuating mechanism of transmission Download PDFInfo
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- CN212775511U CN212775511U CN202021008746.4U CN202021008746U CN212775511U CN 212775511 U CN212775511 U CN 212775511U CN 202021008746 U CN202021008746 U CN 202021008746U CN 212775511 U CN212775511 U CN 212775511U
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Abstract
The utility model discloses a derailleur selects actuating mechanism that shifts, including the driving motor, reduction gears, the action of shifting who arranges in proper order, driving motor includes the shell body and stretches out the motor shaft of shell body, and the motor shaft passes through reduction gears and is connected with the action of shifting transmission, the action of shifting constructs including the surface have along the shift drum that is used for shifting the drive spout of circumference setting, the drive spout is at least including the section of maintaining that is located same cross section and the section of becoming the rail that is used for shifting, it is provided with at least 4 to integrate on the shift drum drive spout, reduction gears include the first planet row, the second planet row that concatenate with the motor shaft, and the second planet row includes that one end is equipped with the second planet carrier of connecting the plug bush, shift drum be equipped with and be connected plug bush splined connection's transmission head. The utility model discloses can greatly simplify the complete machine structure, reduce the required moment of torsion of motor to reduce the overall dimension of complete machine, be favorable to reducing manufacturing cost.
Description
Technical Field
The utility model relates to a derailleur technical field, concretely relates to derailleur selects actuating mechanism that shifts.
Background
It is known that a transmission on an automobile realizes speed change and gear shift through a gear shift mechanism, and the basic principle and the function of the gear shift mechanism are that different gears in a gearbox slide in the axial direction, so that different gear matching is formed, different transmission ratios are realized, and the effect of speed change and gear shift is achieved. The existing transmission gear selecting and shifting actuating mechanism usually comprises a driving motor, a speed reducing mechanism and a gear shifting actuating mechanism, wherein the speed reducing mechanism usually adopts a parallel gear speed reducer or a screw rod speed reducer, the gear shifting actuating mechanism adopts a gear shifting drum or a gear shifting fork, a plurality of driving grooves are formed in the circumferential surface of the gear shifting drum, and a gear shifting fork guide block is arranged in each driving groove in a sliding manner. When gear shifting is needed, the driving motor rotates, and the gear shifting action mechanism is driven to act after the speed is reduced by the speed reducing mechanism, so that the gear shifting action is completed. When the gear shifting actuating mechanism adopts the gear shifting drum, the motor drives the gear shifting drum to rotate through the speed reducing mechanism, the torque of the driving motor is amplified and promoted at the moment, and then the gear shifting drum can enable the gear shifting fork guide block in at least one driving groove to move in the circumferential direction, so that gear shifting is realized.
In the existing gear selecting and shifting actuating mechanism adopting the gear shifting drum, for convenience of processing, manufacturing and control, two gear shifting drums are usually adopted to respectively control gear shifting of different gears, and accordingly, two driving motors and two sets of speed reducing mechanisms need to be configured, and each driving motor drives one gear shifting drum to rotate through one set of speed reducing mechanism. For example: for a 6-gear transmission, one shift drum can be responsible for shifting odd gears, and the other shift drum can be responsible for shifting even gears and reverse gears, so that the structure of the shift drums is simplified. Particularly, when 2 gears need to be switched simultaneously, the gear shifting mechanism adopting the two gear shifting drums can control the rotation of the two driving motors respectively, so that the purpose of controlling the two gears simultaneously is achieved. That is to say, it is favorable to simplifying the arrangement of drive groove on single shift drum and the control of controller to two motors to realize the logical cooperation between the different drive grooves, satisfy the gear shift demand of different fender position.
However, the existing transmission gear selecting and shifting actuating mechanism has the following defects: first, the gear shifting by two sets of mechanisms increases the mechanical complexity of the whole mechanism, and in particular, increases the overall size and weight of the whole mechanism because the required working torque of a single driving motor is not changed, and the same is true for the speed reducing mechanism, that is, an additional driving motor and a set of speed reducing mechanism are required, thereby greatly increasing the size and weight of the whole machine and the manufacturing cost of the whole machine. Secondly, the existing parallel gear speed reducer or screw rod speed reducer has the problems of small speed reduction ratio, large external dimension and especially large axial dimension in a certain space. For most of the parallel gear reducers or the screw reducers, the reduction ratio is usually less than 1/30 due to the related limitations, and the smaller reduction ratio causes the torque required by the driving motor to increase on the premise that the torque required for driving the shift drum is constant, and in addition, the precision of the rotation angle of the driving motor needs to be more accurately controlled, thereby causing the increase of the size and the cost of the driving motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the complete machine structure that current derailleur selection actuating mechanism exists is complicated, overall dimension is big to and the required moment of torsion of motor is big, manufacturing cost is high, provide a derailleur selection actuating mechanism that shifts, can greatly simplify the complete machine structure, reduce the required moment of torsion of motor, thereby reduce the overall dimension of complete machine, be favorable to reducing manufacturing cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a derailleur selects actuating mechanism that shifts, is including the driving motor, reduction gears, the actuating mechanism that shifts who arranges in proper order, driving motor includes the shell body and stretches out the motor shaft of shell body, and the motor shaft passes through reduction gears and is connected with the actuating mechanism transmission of shifting, the actuating mechanism of shifting has along the shift drum that is used for shifting the drive spout that circumference set up including the surface, and the drive spout is at least including the section of maintaining that is located same cross section and the section of becoming the orbit that is used for shifting, it is provided with at least 4 to integrate on the shift drum drive spout, reduction gears include first planet row, the second planet row that concatenate with the motor shaft, and the second planet row includes that one end is equipped with the second planet carrier of connecting the plug bush, the shift drum be equipped with the transmission head of being.
First, the utility model discloses a shift drum is integrated form shift drum, sets up 4 at least drive spouts at shift drum's circumference surface integration to can realize that whole selection that keeps off the position shifts, that is to say, the utility model discloses a one set of selection shift actuating mechanism that driving motor, reduction gears and shift drum constitute can realize whole shifting, therefore can simplify overall structure, reduce overall dimension.
In particular, the speed reducing mechanism of the present invention is formed by connecting two planetary rows in series, so that the speed reducing ratio can be greatly increased (the speed reducing ratio can be larger than 110: 1), and the external dimension of the speed reducing mechanism, especially the axial length dimension, can not be increased. On the basis, the torque and the power required by the driving motor are reduced, the control precision of the rotation angle of the driving motor is reduced, the size of the driving motor can be reduced, and the manufacturing cost is reduced.
It should be noted that, when the shift drum rotates, the shift fork guide block arranged in the driving chute slides in the driving chute, and the driving chute comprises a maintaining section and a track changing section which are positioned in the same cross section and are used for shifting gears. When the shifting fork guide block slides in the maintaining section of the driving sliding groove, the shifting fork guide block cannot form axial displacement, so that the original state can be maintained unchanged, and the position of a gear in the corresponding transmission is kept unchanged. When the shifting fork guide block slides in the track transfer section of the driving sliding groove, the shifting fork guide block forms axial displacement, so that the gear position in the corresponding transmission is driven to change, different gear meshing relations are formed, and the speed change effect is achieved. It is understood that the track-changing section is formed by bending the maintaining section obliquely.
Preferably, the first planet row comprises a first driving gear connected with the motor shaft, a first inner gear ring fixedly connected to the outer shell at one end of the motor shaft, a first planet carrier arranged in the first inner gear ring, and a first planet wheel arranged on the first planet carrier, wherein the first planet wheel is respectively meshed with the first driving gear and the first inner gear ring; the second planet row comprises a second driving gear, a second inner gear ring fixedly connected with the first inner gear ring, a second planet carrier arranged in the second inner gear ring, and a second planet wheel arranged on the second planet carrier, the second planet wheel is respectively meshed with the second driving gear and the second inner gear ring, a transmission hole is formed in the center of the first planet carrier, and a gear shaft of the second driving gear is inserted in the transmission hole so as to form transmission connection with the first planet carrier.
It is known that, as a speed reducing mechanism, a planetary gear set is a typical prior art, and the utility model discloses link firmly the first ring gear in the first planetary gear set, the second ring gear in the second planetary gear set on the shell body of motor shaft one end together, both convenient assembly can make driving motor and speed reducer mechanism assemble into an organic whole structure again. It is understood that the axial dimension of the entire reduction mechanism is substantially only the superimposed thickness of the first ring gear and the second ring gear, and therefore, the axial dimension can be greatly reduced.
Preferably, at least two lugs are respectively arranged on the outer shell of the driving motor and the outer sides of the first inner gear ring and the second inner gear ring, and fastening screws for connecting the first inner gear ring and the second inner gear ring with the outer shell are arranged on the lugs.
The first inner gear ring, the second inner gear ring and the shell are connected through the correspondingly arranged lugs by screws, so that the assembly is convenient, and the overall dimensions of the shell, the first inner gear ring and the second inner gear ring can be reduced.
Preferably, the first planet carrier is disc-shaped, a gear shaft inserted on the first planet carrier is arranged on one side, far away from the motor shaft, of the first planet gear, and a gear shaft spline of the second driving gear is connected in the transmission hole.
The utility model discloses set first planet carrier to the disc, like this, but second drive gear's gear shaft splined connection is downthehole at the transmission of first planet carrier to make things convenient for concatenating of first planet row and second planet row. It is known that in the planetary line, if the input is through the sun gear, the output is through the planetary carrier, the maximum reduction ratio can be obtained, and the utility model discloses a second drive gear of second planet row connects on the first planet carrier of first planet row when, therefore, can furthest promote the total reduction ratio of second grade planet row.
Preferably, a connecting support is arranged on one side, away from the first inner gear ring, of the second inner gear ring, the fastening screws penetrate through screw through holes in the lugs and then are in threaded connection with the connecting support, the connecting plug bush extends into the connecting support, and a positioning bearing is arranged between the connecting plug bush and the connecting support.
In the scheme, the fastening screw penetrates through the screw through hole in the lug and then is in threaded connection with the connecting support, so that the connecting support plays a role similar to a nut on one hand and fixes the first inner gear ring and the second inner gear ring on the outer shell far and conveniently, and a positioning bearing is arranged between the connecting plug bush and the connecting support on the other hand, so that the connecting support can play a good central positioning role in the connecting plug bush.
Preferably, be equipped with the division board in connecting the plug bush to separate into the connecting plug bush and be close to the fixed orifices of motor shaft one end, be close to the connecting hole of shift drum one side, the division board center is equipped with the screw via hole, the transmission head includes that splined connection is at the transmission section of connecting in the connecting hole, the coaxial fixed section that sets up at the transmission section tip, the tip threaded connection that the fixed section stretches out the screw via hole of division board has the lock nut who sinks to be located the fixed orifices.
The division board will be connected the plug bush and become the fixed orifices that is close to motor shaft one end, be close to the connecting hole of shift drum one side, like this, shift drum goes up the transmission section of drive head and can form splined connection with the connecting hole to reduction gears transmits the moment of torsion to shift drum, and meanwhile, the fixed section of drive end front end then passes the screw via hole of division board and falls into the lock nut who is located the fixed orifices and form threaded connection, so that make connect between plug bush and the drive head reliably be connected.
It should be noted that, during assembly, the transmission head can be inserted into the connecting plug bush, the fixing section penetrates through the screw through hole of the partition plate, the transmission section is in splined connection with the connecting hole, the locking nut is reliably connected with the fixing section from one side of the fixing hole of the connecting plug bush, finally the shell of the driving motor is connected with the first inner gear ring, the second inner gear ring and the connecting support through the fastening screws, and the driving motor can be conveniently connected with the speed reducing mechanism and the gear shifting drum into a whole.
Therefore, the utility model discloses following beneficial effect has: the structure of the whole machine can be greatly simplified, and the torque required by the motor is reduced, so that the overall dimension of the whole machine is reduced, and the manufacturing cost is favorably reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of a drive dog on the shift drum.
Fig. 3 is a schematic structural diagram of the speed reducing mechanism of the present invention.
In the figure: 1. the gear shifting device comprises a driving motor 11, an outer shell 111, a lug 12, a motor shaft 2, a gear shifting drum 21, a driving chute 211, a maintaining section 212, a track changing section 22, a transmission head 221, a transmission section 222, a fixed section 3, a first planet row 31, a first driving gear 32, a first planet carrier 321, a transmission hole 33, a first planet gear 34, a first inner gear ring 4, a second planet row 41, a second driving gear 42, a second planet carrier 421, a connecting plug bush 422, a separation plate 423, a fixed hole 424, a connecting hole 43, a second planet gear 44, a second inner gear ring 5, a fastening screw 6, a connecting support 7, a positioning bearing 8 and a locking nut.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, a gear selecting and shifting actuator of a transmission, which is suitable for gear selecting and shifting operations of an automotive transmission with multiple gears, is known to change the reduction ratio (i.e., gear position) of the entire transmission by adjusting the positions of several adjusting gears in the axial direction, so as to change the engaging objects, wherein the adjusting gears can be selectively engaged with one of the two side gears, or even can be selected to be in an "off" state. Specifically, the utility model discloses a coaxial driving motor 1, reduction gears, the action of shifting mechanism of arranging in proper order, driving motor wherein provides moment of torsion and power for the action of shifting mechanism, and driving motor includes the shell body 11 that is roughly the cylinder form and stretches out the motor shaft 12 of shell body, and the motor shaft increases to turn round the back through reduction gears's speed reduction and is connected with the action of shifting mechanism transmission.
The gear shifting action mechanism comprises a gear shifting drum 2, at least 4 driving sliding grooves 21 are formed in the surface of the gear shifting drum in an integrated mode and are arranged along the circumferential direction, and gear shifting fork guide blocks (not shown in the figure) used for driving and adjusting gear displacement are arranged in the driving sliding grooves. As shown in fig. 2, the driving chute includes at least a first section maintaining section 211 and a first section shifting rail section 212, the first section maintaining section is located in the same cross section, that is, when the shift drum rotates forward and the shift fork guide moves in the maintaining section, the axial position of the shift fork guide is not changed, so that the adjusting gear is maintained in the original state. When the shifting fork guide block moves from the first section maintaining section to the first section track changing section, the axial position of the shifting fork guide block changes, so that the adjusting gear moves axially to shift gears. It can be understood that the first section of the track rail should be formed by bending the first section of the maintaining section obliquely, and in a normal case, when the shift fork guide block needs to keep the original state after shifting, the first section of the track rail should be connected with a second section of the maintaining section, and the second section of the maintaining section is not in the same cross section with the first section of the maintaining section. If the rear of the shifting fork guide block needs to return to the initial position again, the second section of maintaining section is connected with a second section of track changing section, the inclination direction of the second section of track changing section is opposite to that of the first section of track changing section, so that the shifting fork guide block returns to the original position.
It should be noted that the integrated arrangement in this embodiment means that all the drive chutes are all arranged on the same shift drum, so as to reduce the number of shift drums.
In addition, the reduction gear comprises a first planet row 3 connected with the motor shaft, a second planet row 4 connected with the first planet row, the second planet row comprises a second planet carrier 42 with one end provided with a connecting plug 421, and the gear shift drum is provided with a transmission head 22 connected with the connecting plug through a spline. When driving motor rotates, can arrange through first planet, the speed reduction back that the second planet was arranged, drive the transmission head rotation of the drum of shifting, drive the drum of shifting then and rotate, because the reduction gears that first planet was arranged, the second planet row constitutes has very big drive ratio, consequently, under the fixed prerequisite of the required moment of torsion of the drum of shifting of drive, the required moment of torsion of driving motor is reduced to the science and technology ground to correspondingly reduce driving motor turned angle's control accuracy.
As a preferable scheme, as shown in fig. 1 and 3, the first planetary row includes a first driving gear 31 (i.e., a sun gear), a first ring gear 34, a first carrier 32, and first planet gears 33 disposed on the first carrier, and the first planet gears are respectively engaged with the first driving gear and the first ring gear; the second planetary row comprises a second driving gear 41 (i.e. a sun gear), a second ring gear 44, a second planetary carrier arranged in the second ring gear, and second planetary gears 43 arranged on the second planetary carrier, wherein the second planetary gears are respectively engaged with the second driving gear and the second ring gear. The first driving gear is arranged on a motor shaft, the first inner gear ring and the second inner gear ring are fixedly connected to an outer shell at one end of the motor shaft through fastening screws 5, a transmission hole 321 is formed in the center of the first planet carrier, and a gear shaft of the second driving gear is inserted into the transmission hole so as to form transmission connection with the first planet carrier. That is, in the first planetary row, the first driving gear is an input end, the first planetary carrier is an output end, in the second planetary row, the second driving gear is an input end, and the second planetary carrier is an output end. It is known that in a planetary gear train, if the ring gear is fixed, then the reduction ratio is maximized with the sun gear in the center as the input and the planet carrier as the output. The utility model discloses make full use of the reduction ratio of first, second planet row to make whole reduction gears can reach 1: 120, the effects of speed reduction and lifting torque are sufficiently achieved, and it is ensured that the reduction mechanism maintains a small outer dimension, particularly a short axial dimension.
In order to facilitate installation, at least two lugs 111 are respectively arranged on the outer shell of the driving motor and the outer sides of the first inner gear ring and the second inner gear ring, the lugs are uniformly distributed in the circumferential direction, screw through holes are formed in the lugs, fastening screws are arranged on the lugs of the outer shell, and the fastening screws sequentially penetrate through the outer shell and the screw through holes in the lugs of the first inner gear ring and the second inner gear ring and then can be in threaded connection with locking nuts, so that the first inner gear ring, the second inner gear ring and the outer shell are fixedly connected, the assembly is convenient, and the outer shell, the first inner gear ring and the second inner gear ring can be reduced in overall dimension.
Furthermore, the first planet carrier can be arranged into a disc shape, and a gear shaft inserted on the first planet carrier is arranged on one side of the first planet wheel, which is far away from the motor shaft, so that the first planet wheel and the first planet carrier form rotary connection. In addition, the gear shaft of the second driving gear is splined in the transmission hole in the center of the first planet carrier, so that the first planet carrier transmits torque to the second driving gear.
It should be noted that the first planet carrier rotates around the central transmission hole during operation, that is, the position of the central second driving gear of the first planet carrier does not change during rotation.
Furthermore, a connecting support 6 can be arranged on one side of the second inner gear ring, which is far away from the first inner gear ring, and the fastening screw penetrates through the screw through hole on the lug and then is in threaded connection with the connecting support. That is to say, the connecting support in this case first acts as a locking nut. Furthermore, the connection sleeve on the second planet carrier projects into the connection carrier, so that an annular gap is formed between the connection carrier and the connection sleeve, in which annular gap two positioning bearings 7 are arranged next to one another in the circumferential direction, so that the connection sleeve is reliably centered in the connection carrier.
In order to facilitate the connection of the gear shifting drum and the speed reducing mechanism, a partition plate 422 can be further arranged in the connecting plug bush, so that the connecting plug bush is divided into a fixing hole 423 close to one end of the motor shaft and a connecting hole 424 close to one side of the gear shifting drum, and a screw through hole is formed in the center of the partition plate. In addition, the transmission head of the gear shifting drum comprises a transmission section 221 in splined connection with the connecting hole and a fixing section 222 coaxially arranged at the end part of the transmission section, and the end part of the fixing section, extending out of the screw through hole of the partition plate, is in threaded connection with a locking nut 8 sunk in the fixing hole, so that the connection plug bush and the transmission head are reliably connected.
During assembly, the transmission head can be inserted into the connecting plug bush firstly, the fixing section penetrates through the screw through hole of the partition plate, the transmission section is in splined connection with the connecting hole, then the locking nut is reliably connected with the fixing section from one side of the fixing hole of the connecting plug bush, finally the shell of the driving motor is connected with the first inner gear ring, the second inner gear ring and the connecting support through the fastening screws, and the driving motor can be conveniently connected with the speed reducing mechanism and the gear shifting drum into a whole.
Claims (6)
1. The utility model provides a derailleur selects actuating mechanism that shifts, is including the driving motor, reduction gears, the actuating mechanism that shifts who arranges in proper order, driving motor includes the shell body and stretches out the motor shaft of shell body, and the motor shaft passes through reduction gears and is connected with the actuating mechanism transmission of shifting, the actuating mechanism of shifting has along the shift drum that is used for shifting the drive spout that circumference set up including the surface, and the drive spout is at least including the section of maintaining that is located same cross section and the section of becoming the rail that is used for shifting, characterized by, it is provided with at least 4 to integrate on the shift drum drive spout, reduction gears include first planet row, the second planet row that concatenate with the motor shaft, and the second planet row includes that one end is equipped with the second planet carrier of connecting the plug bush, shift drum be equipped with and be connected the transmission head of.
2. The gear selecting and shifting actuating mechanism of the transmission as claimed in claim 1, wherein the first planetary row comprises a first driving gear connected with the motor shaft, a first inner gear ring fixedly connected with the outer shell at one end of the motor shaft, a first planet carrier arranged in the first inner gear ring, and a first planet gear arranged on the first planet carrier, wherein the first planet gear is respectively meshed with the first driving gear and the first inner gear ring; the second planet row comprises a second driving gear, a second inner gear ring fixedly connected with the first inner gear ring, a second planet carrier arranged in the second inner gear ring, and a second planet wheel arranged on the second planet carrier, the second planet wheel is respectively meshed with the second driving gear and the second inner gear ring, a transmission hole is formed in the center of the first planet carrier, and a gear shaft of the second driving gear is inserted in the transmission hole so as to form transmission connection with the first planet carrier.
3. The gear selecting and shifting actuating mechanism of the transmission as claimed in claim 2, wherein at least two lugs are respectively arranged on the outer shell of the driving motor and the outer sides of the first inner gear ring and the second inner gear ring, and fastening screws for connecting the first inner gear ring and the second inner gear ring with the outer shell are arranged on the lugs.
4. The gear selecting and shifting actuating mechanism of the transmission as claimed in claim 2, wherein the first planet carrier is disc-shaped, a gear shaft inserted into the first planet carrier is arranged on one side of the first planet carrier, which is far away from the motor shaft, and a gear shaft of the second driving gear is connected with the transmission hole in a spline mode.
5. The gear selecting and shifting actuating mechanism of the transmission as claimed in claim 3, wherein a connecting support is arranged on the side of the second inner gear ring away from the first inner gear ring, the fastening screw penetrates through the screw through hole on the lug and then is in threaded connection with the connecting support, the connecting plug bush extends into the connecting support, and a positioning bearing is arranged between the connecting plug bush and the connecting support.
6. The gear shifting actuator of claim 1, wherein a partition plate is provided in the coupling sleeve to partition the coupling sleeve into a fixing hole near one end of the motor shaft and a connecting hole near one side of the shift drum, a screw passing hole is provided in the center of the partition plate, the driving head includes a driving section splined in the connecting hole and a fixing section coaxially provided at an end of the driving section, and an end of the fixing section extending out of the screw passing hole of the partition plate is threadedly connected with a lock nut recessed in the fixing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021008746.4U CN212775511U (en) | 2020-06-04 | 2020-06-04 | Gear selecting and shifting actuating mechanism of transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021008746.4U CN212775511U (en) | 2020-06-04 | 2020-06-04 | Gear selecting and shifting actuating mechanism of transmission |
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| CN212775511U true CN212775511U (en) | 2021-03-23 |
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| CN202021008746.4U Active CN212775511U (en) | 2020-06-04 | 2020-06-04 | Gear selecting and shifting actuating mechanism of transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734822A (en) * | 2020-06-04 | 2020-10-02 | 杭州杰途传动部件有限公司 | Gear selecting and shifting actuating mechanism of transmission |
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2020
- 2020-06-04 CN CN202021008746.4U patent/CN212775511U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734822A (en) * | 2020-06-04 | 2020-10-02 | 杭州杰途传动部件有限公司 | Gear selecting and shifting actuating mechanism of transmission |
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