CN213685140U

CN213685140U - Gear transmission mechanism with variable speed

Info

Publication number: CN213685140U
Application number: CN202022198705.2U
Authority: CN
Inventors: 夏德成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-13
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a gear drive of variable-speed, a serial communication port, this mechanism including drive assembly, toper variable-speed gear, the gear and the output assembly that have the activity teeth of a cogwheel, drive assembly and toper variable-speed gear connection, drive assembly drive toper variable-speed gear rotates, toper variable-speed gear and the gear engagement who has the activity teeth of a cogwheel, the gear that has the activity teeth of a cogwheel is connected with the output assembly, toper variable-speed gear is through the gear revolve that drives the activity teeth of a cogwheel and then drive the motion of output assembly. The utility model discloses in for this mechanism realizes that this mechanism changes speed at work between the number of working teeth of meshing between the gear of during operation accessible increase or reduction variable speed gear variable speed district and the activity teeth of a cogwheel, and this mechanism simple structure, the production of being convenient for more, and convenient to use.

Description

Gear transmission mechanism with variable speed

Technical Field

The utility model belongs to the transmission system field, in particular to gear drive of variable speed.

Background

The gear transmission has wide application range, the transmission power can reach tens of thousands of kilowatts, and the single-stage transmission ratio can reach 8 or more, so the gear transmission is widely applied to machines. Compared with other mechanical transmission, the gear transmission has the advantages that: the work is reliable, and the service life is long; the instantaneous transmission ratio is constant; the transmission efficiency is high; the structure is compact; wide power and application range, etc. The disadvantages are that: the gear manufacturing needs special machine tools and equipment, and the cost is high; when the precision is low, the vibration and the noise are large; it is not suitable for transmission with large distance between shafts. The gear transmission is more in types, and the relative motion of the two gears during transmission is planar motion or spatial motion, so that the two gears can be divided into planar gear transmission and spatial gear transmission. However, in the conventional gear transmission system, speed change cannot be well realized during operation.

For example, patent application No. 201820241312.5, reference 1 discloses an anti-reverse internal ratchet type bevel gear mechanism, which includes a central shaft and two bevel gears meshed with each other, wherein a ratchet wheel is fixed in an inner hole of one of the bevel gears, the ratchet wheel, the bevel gear where the ratchet wheel is located, and the central shaft are coaxial, the central shaft is independently fixed and is not connected with the bevel gear and the ratchet wheel, a pawl matched with the ratchet wheel is arranged on the central shaft, the pawl can shift and reset around the central shaft, and the ratchet wheel can only rotate in a single direction under the action of the pawl. The ratchet and pawl structure is integrated into the bevel gear mechanism, so that the anti-reversion function is realized, the space is saved, and the size is small. However, this mechanism does not achieve the effect of shifting.

Disclosure of Invention

The utility model discloses a first aim at provides a gear drive of variable speed, and this gear drive can realize real-time speed change when carrying out work.

Another object of the utility model is to provide a gear drive of variable speed, this gear drive simple structure just is convenient for produce and process.

In order to achieve the above object, the technical solution of the present invention is as follows.

The utility model provides a gear drive of variable speed, its characterized in that, this mechanism is including drive assembly, toper variable speed gear, the gear and the output assembly that have the activity teeth of a cogwheel, drive assembly and toper variable speed gear connection, drive assembly drive toper variable speed gear rotates, toper variable speed gear and the gear engagement that has the activity teeth of a cogwheel, the gear that has the activity teeth of a cogwheel is connected with the output assembly, toper variable speed gear drives the motion of output assembly through driving the gear rotation that has the activity teeth of a cogwheel; but toper change gear is including whole conical gear main part for the toper, is provided with the variable speed district in this conical gear main part and has the district of dodging the effect, the variable speed district side links up with dodging the district, the variable speed district comprises the teeth of a cogwheel more than two, and the variable speed district divide into the variable speed portion more than two from top to bottom, and the number of teeth of the variable speed portion of the upper side in two adjacent variable speed portions is greater than the number of teeth of the variable speed portion below. The driving assembly is a structure which plays a driving role, and can be realized by a driving motor and some gears which are matched with the driving motor and used for transmission, and the driving assembly can be realized by the prior art. The output assembly is a structure which is used for transmitting the kinetic energy transmitted by the gear with the movable gear teeth in the prior art. In this mechanism, through the cooperation of the gear that has the activity teeth of a cogwheel and toper variable-speed gear, make the gear that has the activity teeth of a cogwheel can transfer from top to bottom on toper variable-speed gear, the position of the gear that realizes having the activity teeth of a cogwheel and the variable-speed portion of difference on the toper variable-speed gear variable speed district corresponds, make this mechanism work tooth number of meshing between the gear of accessible increase or reduction variable-speed gear variable speed district and the activity teeth of a cogwheel at the during operation, realize this mechanism and change speed at work, and this mechanism simple structure, and the production of being convenient for more, and convenient to use.

Furthermore, the speed change area at least comprises more than two gear teeth with sequentially increased lengths, the bottom ends of the gear teeth with the sequentially increased lengths are located at the bottom end of the conical gear main body, the speed change part is divided by the top ends of the gear teeth with the sequentially increased lengths in the speed change area, and for example, an area between the top end of one gear tooth and the top end of the gear tooth with the side shorter than the other gear tooth is the speed change part.

Furthermore, the mechanism also comprises a moving component, the moving component is connected with the gear with the movable gear teeth, and the moving component can drive the gear with the movable gear teeth to move up and down so as to adjust the meshing between the gear with the movable gear teeth and different speed changing parts.

Furthermore, the number of the conical variable-speed gears is two, the gear with the movable gear teeth is arranged between the two conical variable-speed gears, and the side edges of the two conical variable-speed gears, corresponding to the gear with the movable gear teeth, are parallel to each other.

Further, the speed changing parts of the two conical speed changing gears are alternately meshed with the gear with the movable gear teeth, and when one conical speed changing part is meshed with the gear with the movable gear teeth, the avoiding area of the other conical speed changing gear corresponds to the gear with the movable gear teeth. The two conical variable gears can alternately drive a gear with moving teeth.

Furthermore, the driving assembly comprises an input bevel gear, a first driving bevel gear and a second driving bevel gear, the first driving bevel gear and the second driving bevel gear are respectively meshed with two sides of the input bevel gear, and the first driving bevel gear and the second driving bevel gear are respectively connected with the two conical variable-speed gears. The connection between the first and second drive bevel gears and the two conical variable speed gears is realized by a shaft. If the input bevel gear is driven by a driving motor, the first driving bevel gear and the second driving bevel gear are further driven, and the first driving bevel gear and the second driving bevel gear respectively drive the two conical variable-speed gears to rotate.

Furthermore, the output assembly comprises an output shaft and an output gear, the gear with the movable gear teeth is connected with the output gear through the output shaft, and the conical variable speed gear drives the gear with the movable gear teeth to rotate so as to drive the output gear to rotate.

Furthermore, the gear with the movable gear teeth comprises a gear inner ring, a limiting groove is formed in the gear inner ring, a convex strip is arranged on the output shaft corresponding to the limiting groove, the gear with the movable gear teeth is movably sleeved on the output shaft, and the limiting groove is matched with the convex strip; the moving assembly comprises a motor, a screw rod, a moving member, a fixing member and a bearing, the screw rod is fixed with an output shaft of the motor, one end of the moving member is movably sleeved on the screw rod, the other end of the moving member is fixed on an outer ring of the bearing, an inner ring of the bearing is movably sleeved on the output shaft, and the inner ring of the bearing is fixedly connected with a gear with movable gear teeth through the fixing member. Based on the cooperation of spacing recess and sand grip for the gear that has the activity teeth of a cogwheel can only remove in output shaft upper and lower direction, and can not be round output shaft pivoted. The motor drives the screw rod to rotate when rotating, the moving piece moves up and down on the screw rod by the motion of the screw rod, the moving piece drives the bearing to move up and down on the output shaft, and finally the bearing drives the gear with the movable gear teeth to move up and down on the output shaft through the fixing piece; when the gear with the movable gear teeth is driven to rotate by the conical variable-speed gear, the output shaft is driven to rotate due to the matching of the limiting groove and the convex strip, the gear with the movable gear teeth also drives the inner ring of the bearing to rotate, the outer ring of the bearing is not influenced when the inner ring of the bearing rotates, and the outer ring of the bearing is kept not to rotate.

The beneficial effects of the utility model reside in that: compared with the prior art, the utility model discloses in, through the cooperation of the gear that has the movable teeth of a cogwheel and toper variable-speed gear, make the gear that has the movable teeth of a cogwheel can transfer about the toper variable-speed gear, the realization has the gear of the movable teeth of a cogwheel and the position of the variable-speed portion of toper variable-speed gear variable-speed district difference on correspond, make this mechanism increase or reduce the number of working teeth of meshing between the gear of variable-speed gear variable-speed district and the movable teeth of a cogwheel at the during operation accessible, realize this mechanism and change speed at work, and this mechanism simple structure, the production of being convenient for more, and convenient to use.

Drawings

Fig. 1 is a schematic view of a gear of the prior application having movable teeth.

Fig. 2 is a schematic view of a gear of the prior application having movable teeth.

Fig. 3 is a sectional view schematically showing a movable pin of a gear having movable teeth of a prior application in connection with a sector-shaped sliding groove.

Fig. 4 is a schematic view of the position of the drive assembly, conical variable speed gear, gear with movable teeth and output assembly of the present invention.

Fig. 5 is a schematic structural view of the inner ring and the main body of the gear with movable teeth according to the present invention.

Fig. 6 is a schematic structural view of the moving assembly, the gear with the movable gear teeth, and the output shaft of the present invention.

Fig. 7 is a schematic structural view of the first embodiment of the conical variable speed gear according to the present invention.

Fig. 8 is a schematic structural view of a second embodiment of a top view of a conical variable speed gear according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 8, the present invention provides a gear transmission mechanism with variable speed, which is characterized in that the mechanism comprises a driving component 6, a conical variable speed gear 5, a gear 7 with movable gear teeth and an output component 8, wherein the driving component 6 is connected with the conical variable speed gear 5, the driving component 6 drives the conical variable speed gear 5 to rotate, the conical variable speed gear 5 is meshed with the gear 7 with movable gear teeth, the gear 7 with movable gear teeth is connected with the output component 8, and the conical variable speed gear 5 drives the gear 7 with movable gear teeth to rotate so as to drive the output component 8 to move; but toper variable-speed gear 5 is including whole conical gear main part 51 for the toper, its characterized in that, be provided with on the conical gear main part 51 variable speed district 511 and dodge district 512, variable speed district 511 side with dodge and distinguish 512 and link up, variable speed district 511 comprises the teeth of a cogwheel more than two, and variable speed district 511 from top to bottom divide into the variable speed portion more than two, and the number of teeth of the upper gear of the variable speed portion in two adjacent variable speed portions is greater than the number of teeth of the lower gear of variable speed portion. The avoiding area has the following functions: the gear matched with the gear can smoothly rotate on the gear. The escape area can preferably be an area in which no teeth are provided.

Further, the upper speed changing portion 511 of the adjacent two speed changing portions 511 has one more tooth number than the lower speed changing portion 511. See fig. 7. The number of teeth is the number of teeth.

Further, the upper speed changing portion 511 of the adjacent two speed changing portions 511 has two more teeth than the lower speed changing portion 511. See fig. 8.

Further, the mechanism also comprises a moving component 9, the moving component 9 is connected with the gear 7 with movable gear teeth, and the moving component 9 can drive the gear 7 with movable gear teeth to move up and down to adjust the meshing between the gear 7 with movable gear teeth and different speed changing parts.

Further, the number of the conical variable-speed gears 5 is two, the gear 7 having the movable gear teeth is disposed between the two conical variable-speed gears 5, and the sides of the two conical variable-speed gears 5 corresponding to the gear 7 having the movable gear teeth are parallel to each other.

Further, the shifting portions of the two conical variable-speed gears 5 are alternately engaged with the gear 7 having the movable gear teeth, and when one conical variable-speed gear shifting portion is engaged with the gear 7 having the movable gear teeth, the escape area 512 of the other conical variable-speed gear 5 corresponds to the gear 7 having the movable gear teeth. While the relief area 512 of one of the conical variable speed gears 5 corresponds to the gear 7 having the movable gear teeth, the other conical variable speed gear transmission portion meshes with the gear 7 having the movable gear teeth.

Further, the driving assembly 6 comprises an input bevel gear 61, a first driving bevel gear 62 and a second driving bevel gear 63, the first driving bevel gear 62 and the second driving bevel gear 63 are respectively engaged with two sides of the input bevel gear 61, and the first driving bevel gear 62 and the second driving bevel gear 63 are respectively connected with the two conical variable speed gears 5. The connection between the first and second

drive bevel gears

62, 63 and the two conical variable speed gears 5 is made by a shaft 64.

Further, the output assembly 8 comprises an output shaft 81 and an output gear 82, the gear 7 with movable gear teeth is connected with the output gear 82 through the output shaft 81, and the conical variable speed gear 5 drives the gear 7 with movable gear teeth to rotate so as to drive the output gear 82 to rotate.

Further, the gear 7 with the movable gear teeth comprises a gear inner ring 71, a limiting groove 72 is formed in the gear inner ring 71, a protruding strip 811 is arranged on the output shaft 81 corresponding to the limiting groove 72, the gear 7 with the movable gear teeth is movably sleeved on the output shaft 81, and the limiting groove 72 is matched with the protruding strip 811; the moving assembly 9 comprises a motor 91, a screw rod 92, a moving member 93, a fixing member 94 and a bearing 95, wherein the screw rod 92 is fixed with an output shaft of the motor 91, one end of the moving member 93 is movably sleeved on the screw rod 92, the other end of the moving member 93 is fixed on an outer ring of the bearing 95, an inner ring of the bearing 95 is movably sleeved on the output shaft 81, and the inner ring of the bearing 95 is fixedly connected with a gear 7 with moving gear teeth through the fixing member 94.

The teeth of a cogwheel of gear with movable teeth of a cogwheel realize the activity with the toper variable speed gear complex principle with the gear with movable teeth of a cogwheel of the prior application of patent application number "2020204628345" the same, wherein the gear with movable teeth of a cogwheel can be preferably-the internal fixation is provided with the gear with movable teeth of a cogwheel of the prior application of patent application number "2020204628345" of the gear inner ring that has spacing recess.

A gear with movable gear teeth, as shown in fig. 1-3, includes a gear body 1 and a plurality of movable gear teeth 2, wherein the plurality of movable gear teeth 2 are rotatably connected to the gear body 1; the gear body 1 is of an annular structure and is evenly provided with a plurality of through holes 11 matched with the movable gear teeth 2, one end of each movable gear tooth 2 extends into the gear body 1 through the through hole 11 and is rotatably connected with the gear body 1, and the other end of each movable gear tooth 2 extends out of the through hole 11 and protrudes out of the outer wall of the gear body 1. The utility model discloses in, the movable teeth of a cogwheel 2 of gear main part 1 can be designed according to the demand with through-hole 11 quantity, generally is tens, through the aforesaid setting, makes the loose gear rotate, makes things convenient for the different profile of tooth's of adaptation driven gear at the equidistance in center, and driven gear can be the non-parallel tooth, can arrange in a flexible way with anomalous gear, and application scope is wide.

Wherein, the gear body 1 is further provided with a center ring (not shown) inside, an outer circle portion of the center ring (not shown) is connected with an inner circle portion of the gear body 1, and a shaft hole is arranged in the middle of the center ring (not shown). In the present invention, the shaft hole through the center ring (not shown) is connected to the external shaft, so that the gear body 1 can be driven to rotate through the center ring (not shown).

Wherein, activity teeth of a cogwheel 2 is including tooth point portion 21 and movable part 22, a plurality of movable groove 3 has evenly been seted up to the position that the through-hole 11 is corresponded to centre ring (not shown in the figure), through-hole 11 swing joint is passed to the one end of movable part 22 in movable groove 3 of centre ring (not shown in the figure), the other end of movable part 22 and the one end fixed connection of tooth point portion 21, the other end of tooth point portion 21 stretches out through-hole 11 and outstanding in the outer wall of gear body 1, movable part 22 can be in the rotation of movable groove 3, thereby drive tooth point portion 21 and rotate. The utility model discloses in, the setting of tooth point portion 21, movable part 22 and activity groove 3 can conveniently realize the rotation of activity teeth of a cogwheel 2, through tooth point portion 21 and realize the meshing from the driving wheel in gear main part 1, through the setting of movable part 22 and activity groove 3, can drive tooth point portion 21 and rotate, makes the wheel profile of tooth form of this gear change to driven gear that can the different tooth-shaped central equidistance of adaptation.

Wherein, the tooth tip part 21 is a frustum pyramid structure. In the utility model, the tooth tip parts 21 of a plurality of frustum pyramid structures are matched to form a gear tooth which can be meshed with a driven wheel; in order to better fit with the driven wheel in the movement process of the gear, the end part of the tooth tip part 21 facing outwards can be set to be an oval structure; if a complex driven wheel is required to be matched, the tooth tip part of the gear tooth can be made into a round and long edge shape, so that when the tooth tip is firstly contacted with the driven wheel during rotation, force is generated due to non-meshing so that the tooth tip is rotated to a meshed state.

Wherein, the movable part 22 is a cylindrical structure, the through hole 11 is a circular through hole matched with the movable part 22, and the movable groove 3 is a circular movable groove matched with the movable part 22. In the present invention, by the above arrangement, the rotation of the movable portion 22 can be realized better.

Wherein, the bottom of the movable portion 22 is fixedly connected with a movable pin 23, two ends of the movable pin 23 extend out of two sides of the bottom of the movable portion 22, two sides of the movable groove 3 of the center ring (not shown) are provided with a sliding groove 4 corresponding to the movable pin 23, two ends of the movable pin 23 extend into the sliding groove 4, and when the movable portion 22 rotates in the movable groove 3, the movable pin 23 slides in the range of the sliding groove 4. In the utility model, the arrangement of the movable pin 23 and the sliding groove 4 can limit the rotating range of the movable part 22,

wherein, the sliding tray 4 is fan-shaped sliding tray, and the sliding tray 4 of activity groove 3 both sides is central symmetry structure each other, and the both ends that the activity round pin 23 stretched into fan-shaped sliding tray 4 are the arc structure with fan-shaped sliding tray 4 looks adaptation. The utility model discloses in, through the arc structure setting of fan-shaped sliding tray 4 with 23 tip of activity round pin, the slip of realization activity round pin 23 in sliding tray 4 that can be better, moreover because activity round pin 23 can only slide in the spout groove within range to the rotation range of movable part 22 has been restricted.

The movable gear teeth of the gear with the movable gear teeth are arranged, so that when the gear is matched with the conical variable-speed gear, the movable gear teeth can be matched with the conical variable-speed gear through moving, and the gear is meshed with the conical variable-speed gear.

Specifically, the speed change region 511 of the conical variable-speed gear 5 includes six gear teeth, which are sequentially arranged on the conical gear main body 51, and are integrally symmetrical and trapezoidal, and the bottom ends of the six gear teeth are all located at the bottom end of the conical gear main body 51, wherein the first gear tooth, the second gear tooth and the third gear tooth are sequentially increased in length, and the third gear tooth and the fourth gear tooth are equal in length; the lengths of the third gear tooth, the fourth gear tooth, the fifth gear tooth and the sixth gear tooth are reduced in sequence; the six gear teeth can be divided into three parts (three speed change parts) from top to bottom, the part of the six gear teeth between the top end of the first gear tooth (sixth gear tooth) and the tail end of the first gear tooth (sixth gear tooth) is a first speed change part 5111, the part of the six gear teeth between the top end of the second gear tooth (fifth gear tooth) and the top end of the first gear tooth (sixth gear tooth) is a second speed change part 5112, and the part of the six gear teeth between the top end of the third gear tooth (fourth gear tooth) and the top end of the second gear tooth (fifth gear tooth) is a third speed change part 5113; specifically, the first speed changing portion 5111 includes a first gear tooth, a sixth gear tooth, a part of the second gear tooth, a part of the fifth gear tooth, a part of the third gear tooth, and a part of the fourth gear tooth, that is, the number of the gear teeth included in the first speed changing portion 5111 is six; the second shifting portion 5112 includes a part of the second gear teeth, a part of the fifth gear teeth, a part of the third gear teeth, and a part of the fourth gear teeth, that is, the number of the gear teeth included in the second shifting portion 5112 is four; the third shifting portion 5113 includes a part of the third gear teeth and a part of the fourth gear teeth, i.e., the number of the gear teeth included in the third shifting portion 5113 is two.

The beneficial effects of the utility model reside in that: compared with the prior art, the utility model discloses in, in this gear, through transferring from top to bottom on this gear with the gear of this gear adaptation, realize corresponding with the variable speed district different positions, and then make this gear and the gear of adaptation increase or reduce the number of working teeth of this gear at the during operation, realize that this gear changes speed at work with the gear of its adaptation, and this gear simple structure, the production of being convenient for more, and convenient to use.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A gear transmission mechanism with variable speed is characterized by comprising a driving component, a conical variable speed gear, a gear with movable gear teeth and an output component, wherein the driving component is connected with the conical variable speed gear, the driving component drives the conical variable speed gear to rotate, the conical variable speed gear is meshed with the gear with the movable gear teeth, the gear with the movable gear teeth is connected with the output component, and the conical variable speed gear drives the output component to move by driving the gear with the movable gear teeth to rotate; but toper change gear is including whole conical gear main part for the toper, is provided with the variable speed district in this conical gear main part and has the district of dodging the effect, the variable speed district side links up with dodging the district, the variable speed district comprises the teeth of a cogwheel more than two, and the variable speed district divide into the variable speed portion more than two from top to bottom, and the number of teeth of the variable speed portion of the upper side in two adjacent variable speed portions is greater than the number of teeth of the variable speed portion below.

2. The variable speed gear transmission of claim 1, further comprising a moving member, wherein the moving member is connected to the gear having the movable gear teeth, and the moving member can drive the gear having the movable gear teeth to move up and down to adjust the engagement between the gear having the movable gear teeth and the different transmission parts.

3. The variable-speed gear transmission mechanism according to claim 1, wherein the number of the conical variable-speed gears is two, the gear having the movable gear teeth is disposed between the two conical variable-speed gears, and the sides of the two conical variable-speed gears corresponding to the gear having the movable gear teeth are parallel to each other.

4. A variable speed gear transmission according to claim 3, wherein the speed change portions of the two conical variable speed gears alternately mesh with the gear having the movable gear teeth, and when one of the conical variable speed gear speed change portions meshes with the gear having the movable gear teeth, the escape area of the other conical variable speed gear corresponds to the gear having the movable gear teeth.

5. The variable-speed gear transmission mechanism according to claim 1, wherein the driving assembly comprises an input bevel gear, a first driving bevel gear and a second driving bevel gear, the first driving bevel gear and the second driving bevel gear are respectively engaged with two sides of the input bevel gear, and the first driving bevel gear and the second driving bevel gear are respectively connected with two conical variable-speed gears.

6. The variable speed gear transmission of claim 2, wherein the output assembly comprises an output shaft and an output gear, the gear having the movable gear teeth is connected with the output gear through the output shaft, and the conical variable speed gear drives the output gear to rotate by driving the gear having the movable gear teeth to rotate.

7. The variable-speed gear transmission mechanism according to claim 6, wherein the gear with the movable gear teeth comprises an inner gear ring, a limiting groove is formed in the inner gear ring, a convex strip is arranged on the output shaft corresponding to the limiting groove, the gear with the movable gear teeth is movably sleeved on the output shaft, and the limiting groove is matched with the convex strip; the moving assembly comprises a motor, a screw rod, a moving member, a fixing member and a bearing, the screw rod is fixed with an output shaft of the motor, one end of the moving member is movably sleeved on the screw rod, the other end of the moving member is fixed on an outer ring of the bearing, an inner ring of the bearing is movably sleeved on the output shaft, and the inner ring of the bearing is fixedly connected with a gear with movable gear teeth through the fixing member.