CN109854689B - Internal support type gear shifting mechanism gearbox - Google Patents
Internal support type gear shifting mechanism gearbox Download PDFInfo
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- CN109854689B CN109854689B CN201910094928.3A CN201910094928A CN109854689B CN 109854689 B CN109854689 B CN 109854689B CN 201910094928 A CN201910094928 A CN 201910094928A CN 109854689 B CN109854689 B CN 109854689B
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Abstract
The invention relates to the technical field of gearboxes, in particular to an internal stay type gear shifting mechanism gearbox which comprises a gearbox body, a power input shaft, a power output shaft and a clutch, wherein the gearbox body is provided with a gear box body; a gear shifting output shaft I and a gear shifting output shaft II are parallelly arranged in the gearbox body, each gear shifting output shaft I and each gear shifting output shaft II respectively comprises a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid sections, and ring gears or fixed gears with diameters sequentially increasing or decreasing are sleeved on the hollow sections; the diameter of the ring gear which is sleeved outside the first gear shifting output shaft and sequentially increases or decreases, and the fixed gear which is sleeved outside the second gear shifting output shaft and sequentially decreases or increases are correspondingly meshed 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 in operation, and the speed change of more gears is realized.
Description
Technical Field
The invention relates to the technical field of gearboxes, in particular to an internal stay type gear shifting mechanism gearbox.
Background
At present, with the increasingly stringent national standard requirements for automobile energy conservation, various manufacturers have continuous excavation potential in the aspect of gearboxes besides improving the engine technology. Among them, improvement of fuel economy by increasing the gear of a transmission is one of the commonly adopted ways. Whether a Manual (MT) or Automatic (AT) vehicle, the transmission gradually increases from an initial 3-6 forward gears to 7-10 forward gears. With the increase of gears, the volume and weight of the gearbox are also increased, so that each automobile manufacturer difficultly searches for a balance point in the contradiction of energy conservation and weight reduction. In particular, a transverse engine, the space is very limited, and a multi-gear gearbox cannot meet the requirements. Although honda has developed a 10AT transmission for a transverse engine with a reduced axial length, the problems of more complex construction, large volume and heavy weight remain to be solved.
Disclosure of Invention
Aiming at the defects and problems of the existing gearbox, the invention provides an internal bracing type gear shifting mechanism gearbox.
The invention solves the technical problems by adopting the scheme that: an internal bracing type gear shifting mechanism gearbox 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 parallelly arranged in the gearbox body, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid section, and ring gears or fixed gears with diameters sequentially increasing or decreasing are sleeved on the hollow section; the diameter of the ring gear which is sleeved outside the first gear shifting output shaft and sequentially increases or decreases, and the fixed gear which is sleeved outside the second gear shifting output shaft and sequentially decreases or increases are correspondingly meshed 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 sliding grooves are uniformly distributed on the inner cavity walls of the hollow sections of the mounting ring gears of the first gear shifting output shaft and the second gear shifting output shaft along the circumference, each tooth block sliding groove comprises a central hole and limit shoulders on two sides of the central hole, T-shaped diameter pushing gear blocks are matched and arranged in each tooth block sliding groove, a telescopic body is arranged at the inner end of each diameter pushing gear block, tooth shoulders protruding towards two sides are arranged at the outer end of each diameter pushing gear block, 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 gear shifting mechanism comprises a gear shifting output shaft I, a gear shifting output shaft II, a gear shifting output shaft I, a gear shifting output shaft II and a gear shifting gear, wherein the gear shifting gear is a ring gear, teeth distributed on the outer edge of the gear shifting output shaft I are outer ring teeth, teeth distributed on the inner edge of the gear shifting output shaft II are inner ring teeth, bearing sleeves are respectively arranged on two sides of the inner ring teeth, and support bearings are arranged on the gear shifting output shaft I and the gear shifting output shaft II; 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 sides of the shaft shifting blocks are sleeved with bearings to form shaft shifting sliding blocks, when the shaft shifting sliding blocks move to the position of a speed change gear, the outer rings of the bearings are supported at the inner ends of telescopic bodies of the diameter pushing gear shifting blocks, and meanwhile, the diameter pushing gear shifting blocks are pushed to move outwards in the radial direction, and when the diameter pushing gear shifting blocks slide outwards in the radial direction, the gear segments on the surfaces of the gear shoulders can be meshed with the inner ring teeth; the two sides of the T-shaped tooth block sliding groove are respectively provided with a spring mounting groove and a positioning column, the two ends of the return spring are respectively connected with the corresponding positioning columns, and the middle part of the return spring is connected with a backing column arranged on the surface of the telescopic body of the diameter pushing gear block in a hanging mode.
An internal bracing type gear shifting mechanism gearbox 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 parallelly arranged in the gearbox body, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid section, and ring gears or fixed gears with diameters sequentially increasing or decreasing are sleeved on the hollow section; the diameter of the ring gear which is sleeved outside the first gear shifting output shaft and sequentially increases or decreases, and the fixed gear which is sleeved outside the second gear shifting output shaft and sequentially decreases or increases are correspondingly meshed 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 annular wall of the ring gear is provided with outer annular teeth, and the inner annular wall of the ring gear is provided with inner annular teeth; a central cavity is arranged in the hollow section, a tooth block chute is uniformly formed in the shaft section along the ring shape, the notch of the tooth block chute is blocked by the inner ring tooth of the ring gear, the groove bottom is communicated with the central cavity, the inner wall of the tooth block chute is provided with a limiting shoulder, a radial pushing gear block is clamped at the limiting shoulder, the inner end surface of the radial pushing gear block extends out of the groove bottom, and the outer end surface of the radial pushing gear block is provided with gear teeth which can be meshed with the inner ring tooth of the ring gear; the gear shifting device is characterized in that a shaft shifting gear shifting sliding block capable of moving along the axial direction is arranged in the central cavity, and the shaft shifting gear shifting sliding block moves to the gear shifting tooth block to push out the diameter pushing gear shifting tooth block outwards and enable gear shifting teeth on the outer end face of the diameter pushing gear shifting tooth block to be meshed with inner ring teeth of the ring gear to realize transmission.
Further, the speed change gear pair comprises an acceleration gear pair and a deceleration gear pair with different transmission ratios, and a reverse gear is arranged between one pair of deceleration gear pairs.
Further, the inner ring gear is arranged at the center of the inner ring wall of the ring gear, the support bearings are symmetrically arranged at the left side and the right side of the inner ring gear, and the ring gear is sleeved on the hollow section through the support bearings.
Further, the tank bottom of tooth piece spout is provided with the centre bore that link up with the central cavity, the footpath is pushed away and is blocked the tooth piece and includes tooth shoulder and flexible body, tooth shoulder clamping is in spacing circular bead department, and it sets up in tooth shoulder outer terminal surface to block the tooth, flexible body sets up in the centre bore, and flexible body's thickness is a, and the degree of depth of centre bore is b, and wherein a > b, flexible body is towards the bellied cambered surface in centre of the terminal surface of central cavity.
Further, the spring mounting grooves are symmetrically formed in the groove walls of the tooth block sliding grooves, positioning columns are arranged in the spring mounting grooves, return springs are fixedly arranged through the two positioning columns, a withdrawing column is arranged on the telescopic body, the middle parts of the return springs are connected with the withdrawing column, and the return springs can provide elastic force for inwards rebounding of the outwards-ejected diameter pushing gear blocks.
Furthermore, the sliding bearing is sleeved on the shaft shifting sliding block, and the outer ring of the sliding bearing can be contacted with the telescopic body of the radial pushing gear block and push the telescopic body outwards.
Further, an inner bearing is arranged in the central cavity, an inner shaft seat is arranged in the inner bearing, two screws with opposite screw thread directions are axially arranged on the inner shaft seat, the outer ends of the screws extend out of the central cavity and are arranged on a gearbox body through side shaft seats, synchronous gears meshed with each other are respectively sleeved on the screws, a shaft shifting sliding block is sleeved on the two screws in a threaded mode, a screw driving motor is arranged in the gearbox body, and an output belt wheel of the screw driving motor is in transmission connection with a belt wheel at the end portion of one screw through a belt.
Further, 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 extend out of the central cavity respectively and are arranged on a gearbox body through side shaft seats, a shaft shifting sliding block is sleeved on the screw rod and the positioning shaft together, 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 part of the screw rod through a belt.
Further, 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 are 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 the pressing plates and the friction plates to realize transmission, a piston return diaphragm spring is movably arranged on the clutch inner shell, and the other end of the piston return diaphragm spring is connected with the clutch piston.
The invention has the beneficial effects that: the internal support type gear shifting mechanism gearbox is simple in overall structure; the volume is smaller, the weight is lighter, and the intermediate shaft and the meshing gears on the intermediate shaft are reduced through a brand new gear shifting mechanism; the components such as an intermediate gear, a synchronizer tooth seat, a synchronizer and the like of each gear are reduced, and the volume and the weight are obviously reduced and lowered; the gear shifting control is simple in operation, the speed change of more gears is realized, the axial length of the gearbox is comparable to that of the current latest 10AT, and the layout requirement of the transverse engine is met.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a partial assembly of the present invention;
FIG. 3 is a schematic view of a gear shift up state with a gear shift block engaged with a ring gear;
FIG. 4 is a schematic diagram of a reverse gear state in which the radial-push gear tooth block is separated from the ring gear;
FIG. 5 is a schematic view of the structure of the first and diameter shift output shaft shift block;
FIG. 6 is a schematic structural view of a ring gear;
FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;
FIG. 8 is a schematic diagram of the transmission in reverse gear;
FIG. 9 is a schematic diagram of a transmission relationship in a first gear state;
FIG. 10 is a schematic diagram of a six-speed state transmission;
In the figure: 1-gearbox body, 2-power input shaft, 31-shift output shaft I, 32-shift output shaft II, 301-solid section, 302-hollow section, 4-clutch, 401-clutch outer, 402-clutch inner, 403-annular cavity, 404-friction plate, 405-press 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-shift slide block, 801-slide bearing, 9-screw drive motor, 10-tooth block chute, 1001-limit shoulder, 1002-central hole, 12-radial push gear block, 1201-tooth shoulder, 1202-telescopic body, 1203-gear, 13-spring mounting groove, 14-positioning post, 15-gear post, 16-return spring, 17-output gear, 18-reverse gear, 19-synchronous gear, 20-fixed gear.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1: 1-10, the internal bracing type gear shifting mechanism gearbox comprises a gearbox body 1, a power input shaft 2 and a clutch, wherein a first gear shifting output shaft 31 and a second gear shifting output shaft 32 are parallelly arranged in the gearbox body, the first gear shifting output shaft 31 and the second gear shifting output shaft 32 respectively comprise a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid section, and a ring gear 5 or a fixed gear 20 with diameters sequentially increasing or decreasing 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 diameters which are sequentially increased or decreased, and the fixed gear 20 and the ring gear 5 which are sleeved outside the second gear shifting output shaft 32 and have diameters which are sequentially decreased or increased are correspondingly meshed 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 a first gear shifting output shaft 31 through a clutch 4, and the tail end of a second gear shifting output shaft 32 is in transmission connection with the power output shaft through an output gear 17; the power after the gear changes on the first gear change output shaft 31 and the second gear change output shaft 32 is output outwards; the speed change gear pair comprises an acceleration gear pair and a deceleration gear pair with different transmission ratios, wherein a reverse gear is arranged between one pair of deceleration gear pairs; in the embodiment, the speed change gear pair comprises eleven pairs of acceleration gear pairs and deceleration gear pairs with different transmission ratios, wherein a reverse gear 18 is arranged in the middle of the first pair of deceleration gear pairs, and the reverse gear 18 is respectively meshed with two gears in the deceleration gear pairs to change the rotation direction of an output gear of the first pair of deceleration gear pairs to form a reverse gear; the fixed gear 20 arranged on the solid section 301 rotates along with the first gear shifting output shaft 31 or the second gear shifting 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 gear shifting output shaft 31 or the second gear shifting output shaft 32, the outer annular wall of the ring gear 5 is provided with an outer annular tooth 501, the inner annular wall is provided with an inner annular tooth 502, the inner annular tooth 502 is arranged in the central position of the inner annular wall of the ring gear, and the support bearing 503 is symmetrically arranged on the left side and the right side of the inner annular tooth; only when the inner ring teeth 502 of the ring gear 5 are engaged with the gear teeth 1203 of the radial pushing gear block 12, the corresponding ring gear 5 on the hollow section 302 will rotate;
On the inner chamber wall of gear shifting output shaft one 31, gear shifting output shaft two 32, set up T type tooth piece spout 10 along circumference equipartition, it can be seen in fig. 4 that each tooth piece spout 10 includes centre bore 1002 and limit shoulder 1001 of its both sides, and the matching cover is equipped with the footpath of T type and pushes away and shift tooth piece 12 in each tooth piece spout 10. The inner end of each diameter pushing gear tooth block 12 is provided with a telescopic body 1202, the outer end of each diameter pushing gear tooth block is provided with tooth shoulders 1201 protruding towards two sides, the telescopic bodies 1202 are inserted into the central holes 1002 in a matching mode, and tooth sections are respectively arranged on the outer surfaces of the tooth shoulders 1201.
The inner cavities of the first shifting output shaft 31 and the second shifting output shaft 32 are sleeved with shaft shifting blocks, as shown in fig. 5 and 6, meanwhile, the outer sides of the shaft shifting blocks are sleeved with sliding bearings to form shaft shifting sliding blocks 8, when the shaft shifting sliding blocks 8 move to the position of a speed change gear as shown in fig. 5, the outer rings of the bearings are supported at the inner ends of telescopic bodies 1202 of the diameter pushing gear blocks 12, and meanwhile, the diameter pushing gear blocks 12 are pushed to move outwards in the radial direction. After the radial-pushing gear tooth block 12 slides outwards in the radial direction, the tooth segment on the surface of the tooth shoulder 1201 can be meshed with the inner ring tooth 502, so that the corresponding speed change gear is connected with the first gear change output shaft 31 and the second gear change output shaft 32 into a whole, the rotation of the first gear change output shaft 31 and the second gear change output shaft 32 can drive the speed change gear to rotate, and the rotation of the speed change gear can drive the transmission gear to rotate.
In order to enable each diameter pushing gear block 12 to be retracted and pushed, spring mounting grooves 13 are respectively formed in two sides of the T-shaped gear block sliding groove 10, positioning columns 14 are arranged on the 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 connected to a withdrawing column 15 arranged on the surface of a telescopic body 1202 of the diameter pushing gear block 12 in a hanging mode.
When the shift slider 8 is disengaged from the speed change gear position as shown in fig. 6, the shift slider 8 no longer contacts the diameter-push gear tooth blocks 12, and the tooth segments on the surface of the tooth shoulder 1201 can be disengaged from the inner ring tooth 502. The diameter pushing gear tooth blocks 12 slide inwards and shrink respectively in the radial direction under the action of the return springs 16, and the tooth sections on the surfaces of the tooth shoulders 1201 can no longer be meshed with the inner ring teeth 502. So that the first shift output shaft 31, the second shift output shaft 32 are in a disengaged state from the corresponding speed change gears.
The driving shaft shift sliding block 8 moves along the axial direction in various modes, for example, screw holes can be formed in the upper part, the lower part and the middle part of the shaft shift block, an adjusting screw rod is arranged, and guide holes are formed in the shaft shift block at the same time, and guide rods are respectively arranged on the shaft shift block. Or two parallel screw holes are formed in the shaft moving block, adjusting screws are respectively arranged on the two screw holes, the end parts of the two adjusting screws are in transmission connection through a synchronous gear, and one adjusting screw is in transmission connection with a motor rotating shaft.
Example 2: 1-10, the internal bracing type gear shifting mechanism gearbox comprises a gearbox body 1, a power input shaft 2 and a clutch, wherein a first gear shifting output shaft 31 and a second gear shifting output shaft 32 are parallelly arranged in the gearbox body, the first gear shifting output shaft 31 and the second gear shifting output shaft 32 respectively comprise a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid section, and a ring gear 5 or a fixed gear 20 with diameters sequentially increasing or decreasing 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 diameters which are sequentially increased or decreased, and the fixed gear 20 and the ring gear 5 which are sleeved outside the second gear shifting output shaft 32 and have diameters which are sequentially decreased or increased are correspondingly meshed 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 a first gear shifting output shaft 31 through a clutch 4, and the tail end of a second gear shifting output shaft 32 is in transmission connection with the power output shaft through an output gear 17; the power after the gear changes on the first gear change output shaft 31 and the second gear change output shaft 32 is output outwards; the clutch 4 is a multi-plate clutch, the clutch comprises a clutch outer shell 401, a clutch inner shell 402, a plurality of groups of friction plates 404 and pressing plates 405 which are overlapped and crossed, the clutch outer shell 401 and the power input shaft 2 are integrally formed, the clutch inner shell 402 and the first gear shifting output shaft 31 are integrally formed, an annular cavity 403 is formed between the clutch outer shell 401 and the clutch inner shell 402, the friction plates 404 and the pressing plates 405 are mutually overlapped and sleeved in the annular cavity 403 outside the clutch inner shell, the pressing 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 further installed in the clutch outer shell 401, the clutch piston 406 is communicated with a clutch working oil cavity so as to drive the clutch piston 406 to push the pressing plates 405 and the friction plates 404, and the synchronous transmission of the friction plates is realized through larger friction force between the pressing plates and the friction plates, and the power of the power input shaft is further transmitted to the first gear shifting output shaft 31; a ring 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 ring groove, the other end of the piston return diaphragm spring 407 is connected with the clutch piston 406, and when pressure release is achieved during gear shifting, the piston return diaphragm spring 407 can push the clutch piston 406 back to release a pressing sheet, and power is cut off to switch gears; the speed change gear pair comprises an acceleration gear pair and a deceleration gear pair with different transmission ratios, wherein a reverse gear is arranged between one pair of deceleration gear pairs; in the embodiment, the speed change gear pair comprises eleven pairs of acceleration gear pairs and deceleration gear pairs with different transmission ratios, wherein a reverse gear 18 is arranged in the middle of the first pair of deceleration gear pairs, and the reverse gear 18 is respectively meshed with two gears in the deceleration gear pairs to change the rotation direction of an output gear of the first pair of deceleration gear pairs to form a reverse gear; the fixed gear 20 arranged on the solid section 301 rotates along with the first gear shifting output shaft 31 or the second gear shifting 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 gear shifting output shaft 31 or the second gear shifting output shaft 32, the outer annular wall of the ring gear 5 is provided with an outer annular tooth 501, the inner annular wall is provided with an inner annular tooth 502, the inner annular tooth 502 is arranged in the central position of the inner annular wall of the ring gear, and the support bearing 503 is symmetrically arranged on the left side and the right side of the inner annular tooth; only when the inner ring teeth 502 of the ring gear 5 are engaged with the gear teeth 1203 of the radial pushing gear block 12, the corresponding ring gear 5 on the hollow section 302 will rotate; the hollow section 302 is internally provided with a central cavity 6, tooth block sliding grooves 10 with the groove bottoms penetrating the central cavity 6 are uniformly distributed on the hollow section 302 along the ring shape, the tooth block sliding grooves 10 are respectively and correspondingly positioned on the inner side of each ring gear 5, so that the notches of the four tooth block sliding grooves 10 positioned on the inner side of the same ring gear are jointly blocked by the inner wall of the same ring gear 5, the inner wall of the tooth block sliding groove 10 is provided with a limiting shoulder 11, the limiting shoulder is clamped with a diameter-pushing gear block 12, the groove bottoms of the tooth block sliding grooves 10 are provided with a central hole 1002 penetrating the central cavity 6, the inner end surface of the diameter-pushing gear block 12 extends out of the groove bottom through the central hole 1002, the diameter-pushing 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 clamped at right angle surfaces, the limiting shoulder blocks the movement of the diameter-pushing gear block 12 towards the central cavity, and simultaneously, the diameter-pushing gear block 12 is prevented from falling off from the inner wall of the tooth block sliding groove 10, the tooth block sliding groove 10 is provided with a central hole 1002, the inner end surface is provided with a diameter-pushing gear 1201 and the depth of the telescopic body 1202 b, and the diameter-pushing gear block is convenient to move towards the central hole 1202 a, and the axial direction of the central hole 1202 is a, and the diameter-pushing gear block is convenient to move towards the central hole 1202 b, and the central hole 1202 is axially and can be pushed towards the central hole 1202 when the central hole 1202 and is axially and has a diameter-pushing gear hole 1202; the groove wall of the gear block chute 10 is symmetrically provided with spring mounting grooves 13, positioning columns 14 are arranged in the spring mounting grooves, return springs 16 are fixedly arranged through the two positioning columns, a withdrawing column 15 is arranged on the telescopic body 1202, the middle part of each return spring 16 is connected with the corresponding withdrawing column 15, when gear is shifted, the telescopic body 1202 is ejected outwards, the withdrawing column 15 drives the return springs to bend outwards together, the return springs 16 can provide elastic force for rebounding outwards ejected radial pushing gear blocks 12 inwards, after gear shifting, the original shifted radial pushing gear blocks 12 can be pulled back to the original positions (the position state that gear teeth of the radial pushing gear blocks 12 are separated from inner ring teeth of the ring gear 15) by the corresponding return springs 16, and at the moment, the return springs are in a straight state, and the return springs have no elastic force on the radial pushing gear blocks; in this embodiment, an inner bearing 703 is disposed in the central cavity, an inner shaft seat 701 is mounted in the inner bearing 703, two screws 7 with opposite screw thread directions are mounted on the inner shaft seat 701 along the axial direction, a shaft shifting and shifting slider 8 is sleeved on the screws 7, 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 mutually meshed synchronous gears 19 are respectively sleeved on the two screws, so that the two synchronous gears 19 can control the two screws 7 to synchronously rotate, and the screw thread directions of the two screws 7 are opposite, and then the shaft shifting and shifting slider 8 can move along the same direction on the screws 7, so as to control the position of the shaft shifting slider 8 on the screws, when the shaft shifting slider 8 moves to a position of a certain diameter pushing and shifting gear block 12, the diameter pushing and gear block 12 can be pushed outwards and meshed with the inner wall gear ring 5 of the outer edge of the diameter pushing and gear block 12, and the inner ring gear 5 are meshed with each other, and the transmission ratio is realized.
Working principle:
As shown in fig. 6, which is a working schematic diagram of a reverse gear state, the clutch 4 is combined, power is transmitted to the reverse gear fixed gear 20 on the first shift output shaft 31 through the power input shaft 2 and then to the reverse gear 18, at this time, the shaft shift sliding block 8 ejects the radial pushing gear block 12, so that the reverse gear 18 is meshed with the reverse gear ring gear 5, and meanwhile, the gear teeth of the radial pushing gear block 12 are meshed with the inner ring teeth 502 of the corresponding reverse gear ring gear 5, so that the power is transmitted to the second shift output shaft 32, and finally, the power of the second shift output shaft 32 is transmitted to the output gear 17 to realize the output of the power.
As shown in fig. 7, the clutch 4 is combined, power is transmitted to the first gear fixed gear 20 on the first gear shifting output shaft 31 through the power input shaft 2, at this time, the shaft shifting gear shifting slide block 8 ejects the diameter pushing gear block 12, so that the first gear fixed gear at the upper end is meshed with the first gear ring gear at the lower end, and meanwhile, the gear shifting teeth of the diameter pushing gear block 12 are meshed with the inner ring gear 502 of the corresponding first gear ring gear 5, so that the power is transmitted to the second gear shifting output shaft 32, and finally, the power of the second gear shifting output shaft 32 is transmitted to the output gear 17 to realize the output of the power.
From the reverse gear, the first gear to the fifth gear, the gear switching is carried out by sequentially moving the shaft shifting and shifting sliding blocks 8 in the gear shifting output shaft II 32 to carry out reverse gear switching and gear shifting, and the positions of the gear shifting bearing sliding blocks on the gear shifting output shaft I31 are all static.
When the gear is shifted into the sixth gear, the axial shifting sliding block 8 in the gear shifting output shaft II 32 is separated from the idle position and is still, and the axial shifting sliding block 8 on the gear shifting output shaft I31 is gradually moved to continue the gear shifting until the gear shifting is shifted into the highest gear, so that the engine works in the optimal economic state. As shown in fig. 8, the six-gear state is shown, and the working principle is similar to that of the first gear, and is not repeated.
Example 3: the internal support type shift mechanism transmission of the present embodiment will be described centering on the differences from embodiment 2;
In this embodiment, an inner bearing 703 is disposed in the central cavity 6, an inner shaft seat 701 is mounted in the inner bearing, a screw rod 7 and a positioning shaft (the position of the original second screw rod) are axially mounted on the inner shaft seat 701, a shaft shifting slide block 8 is sleeved on the screw rod 7 and the positioning shaft together, one ends of the positioning shaft and the screw rod 7 are respectively mounted on the inner wall of the gear shifting output shaft 3 through the inner shaft seat 701, the other ends are mounted on the gearbox body through an edge shaft seat 702, a belt pulley is mounted at the end of the screw rod 7, and the screw rod is in transmission connection with an output belt pulley at the power output end of the screw rod driving motor 9 through a belt and the belt pulley.
Because the radial pushing gear shifting block 12 always rotates along with the gear shifting output shaft 3 at a high speed, and the axial shifting gear shifting slide block 8 does not rotate, the axial shifting gear shifting slide block is easy to wear due to tangential force for a long time, so in the embodiment, the sliding bearing 801 is sleeved outside the axial shifting gear shifting slide block 8, the inner ring of the sliding bearing 801 is fixedly connected with the axial shifting gear shifting slide block 8, when the axial shifting gear shifting slide block moves on the screw 7, the sliding bearing 801 synchronously moves, and when gear shifting is carried out, the outer ring of the sliding bearing 801 contacts with the corresponding telescopic body 1202 of the radial pushing gear shifting block 12 and pushes the telescopic body outwards, so that gear shifting of the gear is realized, the abrasion of parts is greatly reduced, and the safety is high.
Claims (3)
1. An internal stay formula gearshift gearbox, its characterized in that: 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 parallelly arranged in the gearbox body, the first gear shifting output shaft and the second gear shifting output shaft respectively comprise a solid section and a hollow section, fixed gears with diameters sequentially increasing or decreasing are sleeved on the solid section, and ring gears or fixed gears with diameters sequentially increasing or decreasing are sleeved on the hollow section; the diameter of the ring gear which is sleeved outside the first gear shifting output shaft and sequentially increases or decreases, and the fixed gear which is sleeved outside the second gear shifting output shaft and sequentially decreases or increases are correspondingly meshed 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 sliding grooves are uniformly distributed on the inner cavity walls of the hollow sections of the mounting ring gears of the first gear shifting output shaft and the second gear shifting output shaft along the circumference, each tooth block sliding groove comprises a central hole and limit shoulders on two sides of the central hole, T-shaped diameter pushing gear blocks are matched and arranged in each tooth block sliding groove, a telescopic body is arranged at the inner end of each diameter pushing gear block, tooth shoulders protruding towards two sides are arranged at the outer end of each diameter pushing gear block, 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 gear shifting mechanism comprises a gear shifting output shaft I, a gear shifting output shaft II, a gear shifting output shaft I, a gear shifting output shaft II and a gear shifting gear, wherein the gear shifting gear is a ring gear, teeth distributed on the outer edge of the gear shifting output shaft I are outer ring teeth, teeth distributed on the inner edge of the gear shifting output shaft II are inner ring teeth, bearing sleeves are respectively arranged on two sides of the inner ring teeth, and support bearings are arranged on the gear shifting output shaft I and the gear shifting output shaft II; 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 sides of the shaft shifting blocks are sleeved with bearings to form shaft shifting sliding blocks, when the shaft shifting sliding blocks move to the position of a speed change gear, the outer rings of the bearings are supported at the inner ends of telescopic bodies of the diameter pushing gear shifting blocks, and meanwhile, the diameter pushing gear shifting blocks are pushed to move outwards in the radial direction, and when the diameter pushing gear shifting blocks slide outwards in the radial direction, the gear segments on the surfaces of the gear shoulders can be meshed with the inner ring teeth; spring mounting grooves and positioning columns are respectively formed in two sides of the T-shaped tooth block sliding groove, two ends of a return spring are respectively connected with the corresponding positioning columns, and the middle part of the return spring is hung on a withdrawal column arranged on the surface of a telescopic body of the radial pushing gear block; the speed change gear pair comprises an acceleration gear pair and a deceleration gear pair with different transmission ratios, wherein a reverse gear is arranged between one pair of deceleration gear pairs; the inner ring gear is arranged at the center of the inner ring wall of the ring gear, the support bearings are symmetrically arranged at the left side and the right side of the inner ring gear, and the ring gear is sleeved on the hollow section through the support bearings; the hollow section is internally provided with a central cavity, the bottom of the tooth block chute is provided with a central hole communicated with the central cavity, 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 more than b, and the end face of the telescopic body facing the central cavity is a cambered surface protruding from the center; the spring mounting grooves are symmetrically formed in the groove walls of the tooth block sliding grooves, positioning columns are arranged in the spring mounting grooves, return springs are fixedly arranged through the two positioning columns, a withdrawing column is arranged on the telescopic body, the middle parts of the return springs are connected with the withdrawing column, and the return springs can provide elastic force for rebounding inwards the outwards ejected radial pushing gear blocks; the shaft shifting slide block is sleeved with a sliding bearing, and the outer ring of the sliding bearing can be contacted with the telescopic body of the radial pushing gear tooth block and push the telescopic body outwards; 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 are 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 so as to drive the clutch piston to push the pressing plates and the friction plates to realize transmission, a piston return diaphragm spring is movably arranged on the clutch inner shell, and the other end of the piston return diaphragm spring is connected with the clutch piston.
2. The internal stay shift mechanism gearbox of claim 1, wherein: an inner bearing is arranged in the central cavity, an inner shaft seat is arranged in the inner bearing, two screws with opposite screw thread directions are axially arranged on the inner shaft seat, the outer ends of the screws extend out of the central cavity and are arranged on a gearbox body through side shaft seats, mutually meshed synchronous gears are respectively sleeved on the screws, a shaft shifting sliding block is in threaded sleeve connection with the two screws, a screw driving motor is arranged in the gearbox body, and an output belt wheel of the screw driving motor is in transmission connection with a belt wheel at the end part of one screw through a belt.
3. The internal stay shift mechanism gearbox of claim 1, wherein: 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 extend out of the central cavity respectively and are arranged on a gearbox body through side shaft seats, a shaft shifting sliding block is sleeved on the screw rod and the positioning shaft together, 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 part of the screw rod through a belt.
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| CN201910094928.3A CN109854689B (en) | 2019-01-31 | 2019-01-31 | Internal support type gear shifting mechanism gearbox |
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| CN201910094928.3A CN109854689B (en) | 2019-01-31 | 2019-01-31 | Internal support type gear shifting mechanism gearbox |
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| CN109854689A CN109854689A (en) | 2019-06-07 |
| CN109854689B true CN109854689B (en) | 2024-05-10 |
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| CN113300534B (en) * | 2021-05-18 | 2022-07-22 | 江苏锡安达防爆股份有限公司 | Intelligent energy-saving motor with variable frequency output |
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Effective date of registration: 20240403 Address after: No. 22 Qianxi Road, Dongdong New Area, Wenling City, Taizhou City, Zhejiang Province, 317511 Applicant after: ZHEJIANG HAITIAN MACHINERY Co.,Ltd. Country or region after: China Address before: 450000 21, building 2, yard 18, Huaibei street, Erqi District, Zhengzhou City, Henan Province Applicant before: Niu Qingfeng Country or region before: China |
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