CN209925528U

CN209925528U - Internal stay formula gearshift gearbox

Info

Publication number: CN209925528U
Application number: CN201920168660.9U
Authority: CN
Inventors: 贾利军; 李博; 刘晶鑫; 魏富德; 段粉红; 严剑兵; 牛清锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-01-10
Anticipated expiration: 2029-01-31

Abstract

The utility model relates to the technical field of gearboxes, in particular to an internal support type gear shifting mechanism gearbox, which comprises a gearbox body, a power input shaft, a power output shaft and a clutch; a first gear shifting output shaft and a second gear shifting output shaft are arranged in the gearbox body in parallel, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear or a fixed gear with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear and the fixed gear which are sleeved outside the first gear shifting output shaft and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear and the ring gear which are sleeved outside the second gear shifting output shaft and have sequentially decreased or increased diameters to form a speed change gear pair; one end of the first gear shifting output shaft is in transmission connection with the power input shaft through a clutch; one end of the second gear shifting output shaft is in transmission connection with the power output shaft through an output gear; the gear shifting control is simple to operate, and the speed change of a plurality of gears is realized.

Description

Internal stay formula gearshift gearbox

Technical Field

The utility model relates to a gearbox technical field, concretely relates to internal stay formula gearshift gearbox.

Background

At present, with increasingly stringent national requirements on the standards of automobile energy conservation, manufacturers continuously excavate potential in the aspect of gearboxes besides the improvement of engine technology. Among them, increasing the fuel economy by increasing the gear of the transmission is one of the commonly adopted ways. Whether for a Manual (MT) or Automatic (AT) vehicle, the transmission is gradually increased from the first 3-6 forward gears to 7-10 forward gears. With the increase of gears, the size and the weight of the gearbox are increased, so that various automobile manufacturers difficultly find balance points in the contradiction of energy conservation and weight reduction. Especially, the horizontal engine has limited space, so that the multi-gear gearbox cannot meet the requirement. Although honda has developed a 10AT transmission for a transverse engine with reduced axial length, the more complex construction and bulkiness and weight are still not well improved.

Disclosure of Invention

To the defect and the problem that current gearbox exists, the utility model provides an internal stay formula gearshift gearbox.

The utility model provides a scheme that its technical problem adopted is: a gear box of an internal support type gear shifting mechanism comprises a gear box body, a power input shaft, a power output shaft and a clutch; a first gear shifting output shaft and a second gear shifting output shaft are arranged in the gearbox body in parallel, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear or a fixed gear with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear and the fixed gear which are sleeved outside the first gear shifting output shaft and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear and the ring gear which are sleeved outside the second gear shifting output shaft and have sequentially decreased or increased diameters to form a speed change gear pair; one end of the first gear shifting output shaft is in transmission connection with the power input shaft through a clutch; one end of the second gear shifting output shaft is in transmission connection with the power output shaft through an output gear; t-shaped tooth block chutes are uniformly distributed and arranged along the circumference on the inner cavity walls of hollow sections of the first gear shifting output shaft and the second gear shifting output shaft for mounting the ring gear, each tooth block chute comprises a central hole and limiting shoulders on two sides of the central hole, T-shaped radial pushing and engaging tooth blocks are matched and sleeved in each tooth block chute, a telescopic body is arranged at the inner end of each radial pushing and engaging tooth block, tooth shoulders protruding towards two sides are arranged at the outer ends of the radial pushing and engaging tooth blocks, the telescopic bodies are matched and inserted into the central holes, and tooth sections are respectively arranged on the outer surfaces of the tooth shoulders; the speed change gear is a ring gear, teeth distributed on the outer edge of the speed change gear are outer ring teeth, teeth distributed on the inner edge of the speed change gear are inner ring teeth, bearing sleeves are respectively arranged on two sides of the inner ring teeth, supporting bearings are installed on the two sides of the inner ring teeth, and the first gear shift output shaft and the second gear shift output shaft are installed in the supporting bearings; the inner cavities of the first gear shifting output shaft and the second gear shifting output shaft are respectively sleeved with a shaft shifting block, the outer side of the shaft shifting block is sleeved with a bearing to form a shaft shifting sliding block, when the shaft shifting sliding block moves to a speed change gear position, the outer ring of the bearing is supported at the inner end of a telescopic body of the radial pushing gear engaging block, and simultaneously, the radial pushing gear engaging block is pushed to move outwards along the radial direction, and after the radial pushing gear engaging block slides outwards along the radial direction, a gear section on the surface of the gear shoulder can be meshed with the inner ring gear; the two sides of the T-shaped tooth block sliding groove are respectively provided with a spring mounting groove and positioning columns, two ends of a return spring are respectively connected with the corresponding positioning columns, and the middle part of the return spring is connected with a backstop column arranged on the surface of a telescopic body of the radial pushing and engaging tooth block in a hitching mode.

A gear box of an internal support type gear shifting mechanism comprises a gear box body, a power input shaft, a power output shaft and a clutch; a first gear shifting output shaft and a second gear shifting output shaft are arranged in the gearbox body in parallel, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear or a fixed gear with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear and the fixed gear which are sleeved outside the first gear shifting output shaft and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear and the ring gear which are sleeved outside the second gear shifting output shaft and have sequentially decreased or increased diameters to form a speed change gear pair; one end of the first gear shifting output shaft is in transmission connection with the power input shaft through a clutch; one end of the second gear shifting output shaft is in transmission connection with the power output shaft through an output gear;

the outer ring wall of the ring gear is provided with outer ring teeth, and the inner ring wall is provided with inner ring teeth; a central cavity is arranged in the hollow section, tooth block sliding grooves are uniformly formed in the shaft section along the annular direction, notches of the tooth block sliding grooves are blocked by inner ring teeth of the ring gear, the groove bottom is communicated with the central cavity, a limiting shoulder is arranged on the inner wall of the tooth block sliding grooves, a radial pushing and engaging tooth block is clamped at the limiting shoulder, the inner end face of the radial pushing and engaging tooth block extends out of the groove bottom, and engaging teeth capable of being meshed with the inner ring teeth of the ring gear are arranged on the outer end face of the radial pushing and engaging tooth block; the central cavity is internally provided with a shaft-moving gear-shifting slide block which can move along the axial direction of a shaft, and the shaft-moving gear-shifting slide block can push the radial pushing gear-shifting block out when moving to the gear-shifting block, so that the gear-shifting teeth on the outer end surface of the radial pushing gear-shifting block are meshed with the inner ring teeth of the ring gear to realize transmission.

Furthermore, the speed change gear pair comprises an accelerating gear pair and a decelerating gear pair with different transmission ratios, wherein a reverse gear is arranged between the pair of decelerating gear pairs.

Furthermore, the inner ring teeth are arranged at the center of the inner ring wall of the ring gear, the supporting bearings are symmetrically arranged on the left side and the right side of the inner ring teeth, and the ring gear is sleeved on the hollow section through the supporting bearings.

Furthermore, a central hole communicated with the central cavity is formed in the groove bottom of the tooth block sliding groove, the radial pushing gear engaging block comprises a tooth shoulder and an extensible body, the tooth shoulder is clamped at the position of the limiting shoulder, the engaging tooth is arranged on the outer end face of the tooth shoulder, the extensible body is arranged in the central hole, the thickness of the extensible body is a, the depth of the central hole is b, a is greater than b, and the end face, facing the central cavity, of the extensible body is a cambered surface with a convex center.

Furthermore, spring mounting grooves are symmetrically formed in the groove wall of the tooth block sliding groove, positioning columns are arranged in the spring mounting grooves, return springs are fixedly mounted through the two positioning columns, a withdrawing column is arranged on the telescopic body, the middle of each return spring is connected with the withdrawing column, and each return spring can provide elastic force for outwards ejecting radial pushing engaging tooth blocks to rebound inwards.

Furthermore, a sliding bearing is sleeved on the shaft shift gear shift sliding block, and an outer ring of the sliding bearing can be in contact with a telescopic body of the radial pushing gear shift block and push out the telescopic body outwards.

Further, an inner bearing is arranged in the central cavity, an inner shaft seat is installed in the inner bearing, two screw rods with opposite thread directions are installed on the inner shaft seat along the axial direction, the outer ends of the screw rods extend out of the central cavity and are installed on the gearbox body through side shaft seats, synchronous gears meshed with each other are respectively sleeved on the screw rods, the shaft shifting slide blocks are sleeved on the two screw rods in a threaded mode, a screw rod driving motor is arranged in the gearbox body, and an output belt wheel of the screw rod driving motor is in transmission connection with a belt wheel at the end portion of one of the screw rods through a belt.

Furthermore, an inner bearing is arranged in the central cavity, an inner shaft seat is arranged in the inner bearing, a screw rod and a positioning shaft are axially arranged on the inner shaft seat, the outer ends of the screw rod and the positioning shaft respectively extend out of the central cavity and are arranged on the gearbox body through side shaft seats, the shaft shifting and gear shifting sliding blocks are jointly sleeved on the screw rod and the positioning shaft, a screw rod driving motor is arranged in the gearbox body, and an output belt wheel of the screw rod driving motor is in transmission connection with a belt pulley at the end part of the screw rod through a belt.

The clutch is a multi-plate clutch, the clutch comprises a clutch outer shell integrated with a power input shaft, a clutch inner shell integrated with a gear shifting output shaft, and a plurality of groups of friction plates and pressing plates which are overlapped and crossed, an annular cavity is formed between the clutch outer shell and the clutch inner shell, the friction plates and the pressing plates are sleeved on the clutch inner shell and arranged in the annular cavity, the pressing plates are connected with the clutch outer shell, the friction plates are connected with the clutch inner shell, a clutch piston is further arranged in the clutch outer shell, the clutch piston is communicated with a clutch working oil cavity to drive the clutch piston to push and press the pressing plates and the friction plates to realize transmission, a piston return diaphragm spring is further movably mounted on the clutch inner shell, and the other end of the piston return diaphragm spring is connected with the clutch piston.

The utility model has the advantages that: the internal supporting type gear shifting mechanism gearbox of the utility model has simple integral structure; the gear shifting mechanism has the advantages that the size is smaller, the weight is lighter, and the number of the middle shafts and meshing gears on the middle shafts is reduced through the brand new gear shifting mechanism; the intermediate gears, the synchronizer tooth seats, the synchronizers and other parts of each gear are reduced, and the size and the weight are obviously reduced; the gear shifting control is simple to operate, the speed change of a plurality of gears is realized, the axial length of the gearbox can be comparable to the latest 10AT AT present, and the layout requirement of a transverse engine is met.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the partial assembly of the present invention;

FIG. 3 is a schematic view of a radial thrust dog geared to a ring gear;

figure 4 is a schematic view of a disengaged condition with the radial thrust dog disengaged from the ring gear;

FIG. 5 is a schematic structural view of a first shift output shaft and a radial thrust engaging tooth block;

FIG. 6 is a schematic structural view of the ring gear;

FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;

FIG. 8 is a schematic representation of the transmission relationships in the reverse state;

FIG. 9 is a schematic representation of the gearing relationship for the first gear state;

FIG. 10 is a diagrammatic illustration of the transmission relationship for the six speed condition;

in the figure: 1-gearbox housing, 2-power input shaft, 31-first gear output shaft, 32-second gear output shaft, 301-solid section, 302-hollow section, 4-clutch, 401-clutch outer shell, 402-clutch inner shell, 403-annular cavity, 404-friction plate, 405-pressing plate, 406-clutch piston, 407-piston return diaphragm spring, 5-ring gear, 501-outer ring gear, 502-inner ring gear, 503-support bearing, 6-central cavity, 7-screw, 701-inner shaft seat, 702-side shaft seat, 703-inner bearing, 8-shaft shift slide block, 801-slide bearing, 9-screw drive motor, 10-tooth block chute, 1001-limit, 1002-central hole, 12-radial pushing gear engaging block, 1201-gear shoulder, 1202-telescopic body, 1203-gear engaging tooth, 13-spring installation groove, 14-positioning column, 15-gear disengaging column, 16-return spring, 17-output gear, 18-reverse gear, 19-synchronous gear and 20-fixed gear.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1: an internal support type gear shifting mechanism gearbox is shown in figures 1-10 and comprises a gearbox body 1, a power input shaft 2 and a clutch, a first gear shifting output shaft 31 and a second gear shifting output shaft 32 are arranged in the gearbox body in parallel, the first gear shifting output shaft 31 and the second gear shifting output shaft 32 respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear 5 or a fixed gear 20 with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear 5 and the fixed gear 20 which are sleeved outside the first gear shifting output shaft 31 and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear 20 and the ring gear 5 which are sleeved outside the second gear shifting output shaft 32 and have sequentially decreased or increased diameters to form a speed change gear pair; the outer end of the power input shaft 2 is connected with a driving device, the driving device is an internal combustion engine and the like, the other end of the power input shaft 2 is arranged in the gearbox 1 and is connected with the first gear shifting output shaft 31 through the clutch 4, and the tail end of the second gear shifting output shaft 32 is in transmission connection with the power output shaft through the output gear 17; the power after the gear change on the first gear shift output shaft 31 and the second gear shift output shaft 32 is output outwards; the speed change gear pair comprises an accelerating gear pair and a decelerating gear pair with different transmission ratios, wherein a reverse gear is arranged between the pair of decelerating gear pairs; in this embodiment, the speed change gear pair includes ten pairs of accelerating gear pairs and decelerating gear pairs with different transmission ratios, wherein a reverse gear 18 is arranged in the middle of the first pair of decelerating gear pairs, and the reverse gear 18 is engaged with two gears in the decelerating gear pair respectively to change the rotation direction of the output gear thereof to form a reverse gear; the fixed gear 20 arranged on the solid section 301 rotates along with the first shift output shaft 31 or the second shift output shaft 32, the ring gear 5 is arranged on the hollow section 302 through a support bearing 503 and does not rotate along with the first shift output shaft 31 or the second shift output shaft 32, the outer ring wall of the ring gear 5 is provided with outer ring teeth 501, the inner ring wall is provided with inner ring teeth 502, the inner ring teeth 502 are arranged at the central position of the inner ring wall of the ring gear, and the support bearing 503 is symmetrically arranged on the left side and the right side of the inner ring teeth; only when the inner ring teeth 502 of the ring gear 5 are meshed with the gear teeth 1203 of the radial pushing gear block 12, the corresponding ring gear 5 on the hollow section 302 can rotate;

on the inner cavity walls of the first gear shifting output shaft 31 and the second gear shifting output shaft 32, T-shaped tooth block chutes 10 are uniformly distributed along the circumference, as can be seen from fig. 4, each tooth block chute 10 comprises a central hole 1002 and limiting shoulders 1001 on both sides thereof, and a T-shaped radial pushing gear engaging tooth block 12 is sleeved in each tooth block chute 10 in a matching manner. The inner end of each radial pushing gear block 12 is provided with a telescopic body 1202, the outer end of each radial pushing gear block is provided with a gear shoulder 1201 protruding towards two sides, the telescopic bodies 1202 are inserted into the central holes 1002 in a matched mode, and the outer surfaces of the gear shoulders 1201 are respectively provided with a gear section.

As shown in fig. 5 and 6, a shaft shift block is sleeved in the inner cavity of the first shift output shaft 31 and the second shift output shaft 32, and at the same time, a sliding bearing is sleeved outside the shaft shift block to form a shaft shift slider 8, when the shaft shift slider 8 moves to a speed change gear position as shown in fig. 5, the outer ring of the bearing thereof is supported at the inner end of the telescopic body 1202 of the radial push engaging tooth block 12, and simultaneously, each radial push engaging tooth block 12 is pushed to move outwards in the radial direction. After the radial-pushing engaging gear block 12 slides outwards along the radial direction, the tooth section on the surface of the tooth shoulder 1201 can be meshed with the inner ring teeth 502, so that the corresponding speed change gear is connected with the first shift output shaft 31 and the second shift output shaft 32 into a whole, the first shift output shaft 31 and the second shift output shaft 32 can drive the speed change gear to rotate, and the transmission gear can be driven to rotate by the rotation of the speed change gear.

In order to enable each radial pushing gear block 12 to be retracted and pushed, spring installation grooves 13 and positioning columns 14 are respectively formed on two sides of the T-shaped gear block sliding groove 10, as shown in fig. 4, two ends of a return spring 16 are respectively connected with the corresponding positioning columns 14, and the middle part of the return spring 16 is hung on a backstop column 15 arranged on the surface of the telescopic body 1202 of the radial pushing gear block 12.

When the axial shift slider 8 is disengaged from the change gear position as shown in fig. 6, the axial shift slider 8 no longer contacts the radial push-on dog teeth 12 and the tooth segment at the surface of the tooth shoulder 1201 can disengage from the inner ring tooth 502. The radial-pushing gear-engaging blocks 12 respectively slide inward in radial direction under the action of the return springs 16, and the tooth sections on the surface of the tooth shoulders 1201 can not be engaged with the inner ring teeth 502 any more. So that the first shift output shaft 31 and the second shift output shaft 32 are in a disengaged state with the corresponding speed change gears.

The driving shaft shifting sliding block 8 has various axial movement modes, for example, a screw hole can be arranged on the shaft shifting block in the middle and at the bottom, an adjusting screw rod is installed on the shaft shifting block, and a guide hole is simultaneously arranged on the shaft shifting block and a guide rod is respectively installed on the shaft shifting block. Or two parallel screw holes are arranged on the shaft moving block and are respectively provided with an adjusting screw rod, the end parts of the two adjusting screw rods are in transmission connection through a synchronous gear, and one of the adjusting screw rods is in transmission connection with the motor rotating shaft.

Example 2: an internal support type gear shifting mechanism gearbox is shown in figures 1-10 and comprises a gearbox body 1, a power input shaft 2 and a clutch, a first gear shifting output shaft 31 and a second gear shifting output shaft 32 are arranged in the gearbox body in parallel, the first gear shifting output shaft 31 and the second gear shifting output shaft 32 respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear 5 or a fixed gear 20 with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear 5 and the fixed gear 20 which are sleeved outside the first gear shifting output shaft 31 and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear 20 and the ring gear 5 which are sleeved outside the second gear shifting output shaft 32 and have sequentially decreased or increased diameters to form a speed change gear pair; the outer end of the power input shaft 2 is connected with a driving device, the driving device is an internal combustion engine and the like, the other end of the power input shaft 2 is arranged in the gearbox 1 and is connected with the first gear shifting output shaft 31 through the clutch 4, and the tail end of the second gear shifting output shaft 32 is in transmission connection with the power output shaft through the output gear 17; the power after the gear change on the first gear shift output shaft 31 and the second gear shift output shaft 32 is output outwards; wherein, the clutch 4 is a multi-plate clutch, the clutch includes a clutch outer shell 401, a clutch inner shell 402, and a plurality of sets of friction plates 404 and pressure plates 405 arranged in an overlapping and crossing way, the clutch outer shell 401 and the power input shaft 2 are formed integrally, the clutch inner shell 402 and the first shift output shaft 31 are formed integrally, an annular cavity 403 is formed between the clutch outer shell 401 and the clutch inner shell 402, the friction plates 404 and the pressure plates 405 are sleeved in the annular cavity 403 outside the clutch inner shell in an overlapping way, the pressure plates are nested and installed on the clutch outer shell, the friction plates are nested and installed on the clutch inner shell, a clutch piston 406 is also installed in the clutch outer shell 401, the clutch piston 406 is communicated with a clutch working oil cavity to drive the clutch piston 406 to push and press the pressure plates 405 and the friction plates 404, the synchronous transmission of the friction plates and the pressure plates is realized through the larger friction force, the power of the power input shaft is transmitted to the first gear shifting output shaft 31; an annular groove is further formed in one side, close to the clutch piston, of the clutch inner shell 402, a piston return diaphragm spring 407 is movably arranged in the annular groove, the other end of the piston return diaphragm spring 407 is connected with the clutch piston 406, and when the pressure is relieved during gear shifting, the piston return diaphragm spring 407 can push the clutch piston 406 back to release a pressing sheet, so that power is cut off to perform gear shifting; the speed change gear pair comprises an accelerating gear pair and a decelerating gear pair with different transmission ratios, wherein a reverse gear is arranged between the pair of decelerating gear pairs; in this embodiment, the speed change gear pair includes ten pairs of accelerating gear pairs and decelerating gear pairs with different transmission ratios, wherein a reverse gear 18 is arranged in the middle of the first pair of decelerating gear pairs, and the reverse gear 18 is engaged with two gears in the decelerating gear pair respectively to change the rotation direction of the output gear thereof to form a reverse gear; the fixed gear 20 arranged on the solid section 301 rotates along with the first shift output shaft 31 or the second shift output shaft 32, the ring gear 5 is arranged on the hollow section 302 through a support bearing 503 and does not rotate along with the first shift output shaft 31 or the second shift output shaft 32, the outer ring wall of the ring gear 5 is provided with outer ring teeth 501, the inner ring wall is provided with inner ring teeth 502, the inner ring teeth 502 are arranged at the central position of the inner ring wall of the ring gear, and the support bearing 503 is symmetrically arranged on the left side and the right side of the inner ring teeth; only when the inner ring teeth 502 of the ring gear 5 are meshed with the gear teeth 1203 of the radial pushing gear block 12, the corresponding ring gear 5 on the hollow section 302 can rotate; the hollow section 302 is internally provided with a central cavity 6, tooth block chutes 10 with the bottoms communicated with the central cavity 6 are uniformly distributed on the hollow section 302 along the annular shape, the tooth block chutes 10 are respectively and correspondingly positioned at the inner sides of each ring gear 5, so the notches of the four tooth block chutes 10 positioned at the inner sides of the same ring gear are jointly blocked by the inner wall of the same ring gear 5, the inner wall of each tooth block chute 10 is provided with a limiting shoulder 11, a radial pushing and hanging gear block 12 is clamped at the limiting shoulder, the bottom of each tooth block chute 10 is provided with a central hole 1002 communicated with the central cavity 6, the inner end surface of each radial pushing and hanging gear block 12 extends out of the bottom of each tooth chute through the central hole 1002 to ensure that the radial pushing and hanging gear block 12 can be pushed out outwards, wherein each radial pushing and hanging gear block 12 comprises a tooth shoulder 1201 at the outer end and a telescopic body 1202 at the inner end, the tooth shoulder 1201 and the limiting shoulder 1001 are, meanwhile, the notch of the tooth block sliding groove 10 is blocked by the inner wall of the ring gear 5, so that the radial pushing and engaging tooth block 12 cannot fall off from the tooth block sliding groove 10, engaging teeth 1203 are arranged on the outer end face of the tooth shoulder 1201, the engaging teeth 1203 can be meshed with the inner ring teeth 502, the telescopic body 1202 is arranged in the central hole 1002, the thickness of the telescopic body 1202 is a, the depth of the central hole 1002 is b, wherein a is larger than b, the lower end face of the telescopic body 1202 is ensured to penetrate through the central hole 1002 and extend into the central cavity 6, and the end face of the telescopic body 1202 facing the central cavity is a cambered surface protruding towards the center, so that the radial pushing and engaging tooth block 12 can be smoothly ejected when the axial shifting sliding block 8 moves axially; spring mounting grooves 13 are symmetrically formed in the wall of the tooth block sliding groove 10, positioning columns 14 are arranged in the spring mounting grooves, return springs 16 are fixedly mounted through the two positioning columns, a backstop column 15 is arranged on the telescopic body 1202, the middle parts of the return springs 16 are connected with the backstop column 15, when the gear is shifted, the telescopic body 1202 is ejected outwards, the backstop column 15 drives the return springs to bend outwards together, the return springs 16 can provide elastic force for rebounding the radially-pushed and geared tooth blocks 12 ejected outwards inwards, after the gear is shifted, the radially-pushed and geared tooth blocks 12 which are originally geared can be pulled back to the original positions (the position state that the gear engaging teeth of the radially-pushed and geared tooth blocks 12 are separated from the inner ring teeth of the ring gear 15) by the corresponding return springs 16, and the return springs are rebounded 16 at the moment and have no elastic force for radially-pushing and geared tooth blocks; in this embodiment, an inner bearing 703 is disposed in the central cavity, an inner shaft seat 701 is disposed in the inner bearing 703, two screws 7 with opposite thread directions are axially disposed on the inner shaft seat 701, a shaft shift sliding block 8 is disposed on the screw 7 in a thread sleeve manner, the outer end of each screw 7 extends out of the central cavity 6 and is mounted on the gearbox body through a side shaft seat 702, a belt pulley is mounted at the end of one screw 7 and is in transmission connection with an output belt pulley at the power output end of a screw driving motor 9 through a belt, the screw driving motor 9 drives one screw to rotate, and two screws are respectively sleeved with mutually meshed synchronous gears 19, so that the two synchronous gears 19 can control the two screws 7 to synchronously rotate, and the thread directions of the two screws 7 are opposite, and further the shaft shift sliding block 8 can move on the screw 7 in the same direction to control the position of the shaft shift sliding block 8 on the, when the axial shift sliding block 8 moves to a certain radial push gear block 12, the radial push gear block 12 can be pushed outwards, and the gear teeth 1203 on the outer edge of the radial push gear block 12 are meshed with the inner ring teeth 502 on the inner wall of the ring gear 5, so that the speed change gear pair with a certain transmission ratio corresponding to the ring gear 5 is meshed and driven.

The working principle is as follows:

as shown in fig. 6, which is a working schematic diagram of a reverse gear state, the clutch 4 is engaged, power is transmitted to the reverse fixed gear 20 on the first shift output shaft 31 through the power input shaft 2, and then transmitted to the reverse gear 18, at this time, the radial pushing and engaging tooth block 12 is ejected out by the shaft shifting slider 8, so that the reverse gear 18 is engaged with the reverse ring gear 5, and at the same time, engaging teeth of the radial pushing and engaging tooth block 12 are engaged with inner ring teeth 502 of the corresponding reverse ring gear 5, and then power is transmitted to the second shift output shaft 32, and finally, power of the second shift output shaft 32 is transmitted to the output gear 17, so as to achieve power output.

As shown in fig. 7, the clutch 4 is engaged, power is transmitted to the first-gear fixed gear 20 on the first shift output shaft 31 through the power input shaft 2, at this time, the radial pushing and engaging gear block 12 is pushed out by the axial shifting slider 8, so that the first-gear fixed gear on the upper end is engaged with the first-gear ring gear on the lower end, and the engaging gear of the radial pushing and engaging gear block 12 is engaged with the inner ring gear 502 of the corresponding first-gear ring gear 5, so that power is transmitted to the second shift output shaft 32, and finally, power of the second shift output shaft 32 is transmitted to the output gear 17 to realize power output.

From reverse gear, first gear to fifth gear, the gear is switched by the shaft shift slide block 8 in the second shift output shaft 32 to move in turn to switch reverse gear and shift up, and the position of the shift bearing slide block on the first shift output shaft 31 is still.

When the engine is shifted to the sixth gear, the shaft shift shifting slide block 8 in the second gear shift output shaft 32 is separated to the vacant position and is still, and the shaft shift shifting slide block 8 on the first gear shift output shaft 31 is moved gradually to continue shifting until the engine is shifted to the highest gear, so that the engine works in the best economic state. As shown in fig. 8, the sixth gear state is shown in the figure, and the working principle is similar to that of the first gear, which is not described again.

Example 3: the internal support type shift mechanism transmission case of the present embodiment will be described centering on differences from embodiment 2;

in this embodiment, an inner bearing 703 is provided in the central cavity 6, an inner shaft seat 701 is installed in the inner bearing, a screw 7 and a positioning shaft (the position of the original second screw) are installed on the inner shaft seat 701 along the axial direction, a shaft shift slider 8 is sleeved on the screw 7 and the positioning shaft together, one end of the positioning shaft and one end of the screw 7 are installed on the inner wall of the shift output shaft 3 through the inner shaft seat 701 respectively, the other end of the positioning shaft and the other end of the screw are installed on the gearbox body through a side shaft seat 702, a belt pulley is installed at the end of the screw 7, and the screw is in transmission connection with an output belt pulley at the.

Because the radial pushing engaging tooth block 12 always rotates at high speed along with the gear shifting output shaft 3, and the shaft shifting sliding block 8 does not rotate, the shaft shifting sliding block is easily worn by a tangential force for a long time, in the embodiment, the sliding bearing 801 is sleeved outside the shaft shifting sliding block 8, the inner ring of the sliding bearing 801 is fixedly connected with the shaft shifting sliding block 8, when the shaft shifting sliding block moves on the screw 7, the sliding bearing 801 synchronously moves, and when engaging, the outer ring of the sliding bearing 801 is in contact with the corresponding telescopic body 1202 of a certain radial pushing engaging tooth block 12 and pushes the telescopic body outwards, so that engaging of the gear is realized, the abrasion of parts is greatly reduced, and the safety is high.

Claims

1. The utility model provides an internal stay formula gearshift gearbox which characterized in that: the clutch comprises a gearbox body, a power input shaft, a power output shaft and a clutch; a first gear shifting output shaft and a second gear shifting output shaft are arranged in the gearbox body in parallel, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear or a fixed gear with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear and the fixed gear which are sleeved outside the first gear shifting output shaft and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear and the ring gear which are sleeved outside the second gear shifting output shaft and have sequentially decreased or increased diameters to form a speed change gear pair; one end of the first gear shifting output shaft is in transmission connection with the power input shaft through a clutch; one end of the second gear shifting output shaft is in transmission connection with the power output shaft through an output gear; t-shaped tooth block chutes are uniformly distributed and arranged along the circumference on the inner cavity walls of hollow sections of the first gear shifting output shaft and the second gear shifting output shaft for mounting the ring gear, each tooth block chute comprises a central hole and limiting shoulders on two sides of the central hole, T-shaped radial pushing and engaging tooth blocks are matched and sleeved in each tooth block chute, a telescopic body is arranged at the inner end of each radial pushing and engaging tooth block, tooth shoulders protruding towards two sides are arranged at the outer ends of the radial pushing and engaging tooth blocks, the telescopic bodies are matched and inserted into the central holes, and tooth sections are respectively arranged on the outer surfaces of the tooth shoulders; the speed change gear is a ring gear, teeth distributed on the outer edge of the speed change gear are outer ring teeth, teeth distributed on the inner edge of the speed change gear are inner ring teeth, bearing sleeves are respectively arranged on two sides of the inner ring teeth, supporting bearings are installed on the two sides of the inner ring teeth, and the first gear shift output shaft and the second gear shift output shaft are installed in the supporting bearings; the inner cavities of the first gear shifting output shaft and the second gear shifting output shaft are respectively sleeved with a shaft shifting block, the outer side of the shaft shifting block is sleeved with a bearing to form a shaft shifting sliding block, when the shaft shifting sliding block moves to a speed change gear position, the outer ring of the bearing is supported at the inner end of a telescopic body of the radial pushing gear engaging block, and simultaneously, the radial pushing gear engaging block is pushed to move outwards along the radial direction, and after the radial pushing gear engaging block slides outwards along the radial direction, a gear section on the surface of the gear shoulder can be meshed with the inner ring gear; the two sides of the T-shaped tooth block sliding groove are respectively provided with a spring mounting groove and positioning columns, two ends of a return spring are respectively connected with the corresponding positioning columns, and the middle part of the return spring is connected with a backstop column arranged on the surface of a telescopic body of the radial pushing and engaging tooth block in a hitching mode.

2. The utility model provides an internal stay formula gearshift gearbox which characterized in that: the clutch comprises a gearbox body, a power input shaft, a power output shaft and a clutch; a first gear shifting output shaft and a second gear shifting output shaft are arranged in the gearbox body in parallel, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, a fixed gear with the diameter being sequentially increased or decreased is sleeved on the solid section, and a ring gear or a fixed gear with the diameter being sequentially increased or decreased is sleeved on the hollow section; the ring gear and the fixed gear which are sleeved outside the first gear shifting output shaft and have sequentially increased or decreased diameters are correspondingly meshed with the fixed gear and the ring gear which are sleeved outside the second gear shifting output shaft and have sequentially decreased or increased diameters to form a speed change gear pair; one end of the first gear shifting output shaft is in transmission connection with the power input shaft through a clutch; one end of the second gear shifting output shaft is in transmission connection with the power output shaft through an output gear;

the outer ring wall of the ring gear is provided with outer ring teeth, and the inner ring wall is provided with inner ring teeth; a central cavity is arranged in the hollow section, tooth block sliding grooves are uniformly formed in the shaft section along the annular direction, notches of the tooth block sliding grooves are blocked by inner ring teeth of the ring gear, the groove bottom is communicated with the central cavity, limiting steps are arranged on the inner wall of each tooth block sliding groove, radial pushing and engaging tooth blocks are clamped at the limiting steps, the inner end faces of the radial pushing and engaging tooth blocks extend out of the groove bottom, and engaging teeth capable of being meshed with the inner ring teeth of the ring gear are arranged on the outer end faces of the radial pushing and engaging tooth blocks; the central cavity is internally provided with a shaft-moving gear-shifting slide block which can move along the axial direction of a shaft, and the shaft-moving gear-shifting slide block can push the radial pushing gear-shifting block out when moving to the gear-shifting block, so that the gear-shifting teeth on the outer end surface of the radial pushing gear-shifting block are meshed with the inner ring teeth of the ring gear to realize transmission.

3. The internally supported gear shift transmission according to claim 1 or 2, characterized in that: the speed change gear pair comprises an accelerating gear pair and a decelerating gear pair with different transmission ratios, wherein a reverse gear is arranged between the pair of decelerating gear pairs.

4. The internally supported gear shift transmission according to claim 1 or 2, characterized in that: the inner ring teeth are arranged at the central position of the inner ring wall of the ring gear, the supporting bearings are symmetrically arranged on the left side and the right side of the inner ring teeth, and the ring gear is sleeved on the hollow section through the supporting bearings.

5. The internally supported gear shift transmission according to claim 1 or 2, characterized in that: the tooth block comprises a tooth shoulder and a telescopic body, the tooth shoulder is clamped at the position of a limiting step, the engaging tooth is arranged on the outer end face of the tooth shoulder, the telescopic body is arranged in the central hole, the thickness of the telescopic body is a, the depth of the central hole is b, wherein a is larger than b, and the end face of the telescopic body facing the central cavity is a cambered surface with a convex center.

6. The internally supported shift mechanism transmission of claim 5, wherein: spring mounting grooves are symmetrically formed in the groove wall of the tooth block sliding groove, positioning columns are arranged in the spring mounting grooves, return springs are fixedly mounted through the two positioning columns, a withdrawing column is arranged on the telescopic body, the middle of each return spring is connected with the withdrawing column, and each return spring can provide elastic force for pushing outwards and ejecting radial pushing and engaging with the inward rebounding of the tooth block.

7. The internally supported shift mechanism transmission of claim 5, wherein: the shaft shift gear-shifting sliding block is sleeved with a sliding bearing, and the outer ring of the sliding bearing can be in contact with the telescopic body of the radial pushing gear-shifting tooth block and push out the telescopic body outwards.

8. The internally supported shift mechanism transmission of claim 2, wherein: the gear box is characterized in that an inner bearing is arranged in the central cavity, an inner shaft seat is arranged in the inner bearing, two screw rods with opposite thread directions are axially arranged on the inner shaft seat, the outer ends of the screw rods extend out of the central cavity and are arranged on the gear box body through side shaft seats, the screw rods are respectively sleeved with a synchronous gear which is meshed with each other, the shaft shifting slide block is sleeved on the two screw rods in a threaded mode, a screw rod driving motor is arranged in the gear box body, and an output belt wheel of the screw rod driving motor is in transmission connection with a belt wheel at the end of one of the.

9. The internally supported shift mechanism transmission of claim 2, wherein: the gear box is characterized in that an inner bearing is arranged in the central cavity, an inner shaft seat is arranged in the inner bearing, a screw rod and a positioning shaft are axially arranged on the inner shaft seat, the outer ends of the screw rod and the positioning shaft respectively extend out of the central cavity and are arranged on the gear box body through side shaft seats, the shaft shifting and gear shifting sliding blocks are jointly sleeved on the screw rod and the positioning shaft, a screw rod driving motor is arranged in the gear box body, and an output belt wheel of the screw rod driving motor is in transmission connection with a belt pulley at the end part of the screw rod.

10. The internally supported gear shift transmission according to claim 1 or 2, characterized in that: the clutch is a multi-plate clutch, the clutch comprises a clutch outer shell integrated with a power input shaft, a clutch inner shell integrated with a gear shifting output shaft, and a plurality of groups of friction plates and pressing plates which are overlapped and crossed, an annular cavity is formed between the clutch outer shell and the clutch inner shell, the friction plates and the pressing plates are sleeved on the clutch inner shell and arranged in the annular cavity, the pressing plates are connected with the clutch outer shell, the friction plates are connected with the clutch inner shell, a clutch piston is further arranged in the clutch outer shell, the clutch piston is communicated with a clutch working oil cavity to drive the clutch piston to push and press the pressing plates and the friction plates to realize transmission, a piston return diaphragm spring is further movably mounted on the clutch inner shell, and the other end of the piston return diaphragm spring is connected with the clutch piston.