CN110425258B - Gear box - Google Patents
Gear box Download PDFInfo
- Publication number
- CN110425258B CN110425258B CN201910828647.6A CN201910828647A CN110425258B CN 110425258 B CN110425258 B CN 110425258B CN 201910828647 A CN201910828647 A CN 201910828647A CN 110425258 B CN110425258 B CN 110425258B
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- Prior art keywords
- gear
- sliding
- positioning
- speed regulating
- transmission
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- 230000005540 biological transmission Effects 0.000 claims abstract description 62
- 230000001105 regulatory effect Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Transmission Devices (AREA)
Abstract
The embodiment of the invention discloses a gearbox, which relates to the technical field of speed regulating devices and comprises a speed regulating screw, a sliding block, a sliding gear and a transmission gear set, wherein the sliding block is screwed on the speed regulating screw, the sliding gear is a power input gear, the sliding gear is sleeved outside the sliding block and can freely rotate along the circumferential direction of the sliding block, the sliding gear synchronously moves along the axial direction of the speed regulating screw along with the sliding block, the transmission gear set comprises a connecting gear and a driving gear, the connecting gear is sleeved outside the sliding gear and can synchronously rotate along with the sliding gear, the driving gear is sleeved outside the connecting gear and rotates along with the connecting gear; the transmission gear sets are arranged in a plurality, and the transmission gear sets are distributed side by side along the axial direction of the speed regulating screw rod. Enriches the variety of the existing speed regulating device and has the advantages of compact structure and small volume.
Description
Technical Field
The embodiment of the invention relates to the technical field of speed regulating devices, in particular to a gearbox.
Background
The speed changing box is a speed regulating device capable of changing the transmission ratio, thereby changing the torque and the rotating speed, and is widely applied in the mechanical field. Through many years of development, the gearbox has improved by a long time, and mechanical gearbox in the existing gearbox needs to set up shift fork and sleeve, and shift fork control sleeve slides so that make the gear engagement on the integral key shaft, needs to be equipped with between the adjacent gear and supplies sleeve gliding interval, makes gearbox structure compact, the volume is great.
Disclosure of Invention
Therefore, the embodiment of the invention provides a gearbox to enrich the types of the existing speed regulating devices and solve the problems of incompact structure and large volume caused by the need of arranging a sleeve in the existing mechanical gearbox.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
According to a first aspect of the embodiment of the invention, a gearbox comprises a speed regulating screw, a sliding block, a sliding gear and a transmission gear set, wherein the sliding block is screwed on the speed regulating screw, the sliding gear is a power input gear, the sliding gear is sleeved outside the sliding block and can freely rotate along the circumferential direction of the sliding block, the sliding gear synchronously moves along the axial direction of the speed regulating screw along with the sliding block, the transmission gear set comprises a connecting gear and a driving gear, the connecting gear is sleeved outside the sliding gear and can synchronously rotate along with the sliding gear, the driving gear is sleeved outside the connecting gear and rotates along with the connecting gear;
The transmission gear sets are arranged in a plurality, and the transmission gear sets are distributed side by side along the axial direction of the speed regulating screw rod.
Further, the outer edge of the sliding gear is provided with sliding external teeth, the inner edge of the connecting gear is provided with connecting internal teeth which are equal to the number of the sliding external teeth and are meshed with the sliding external teeth, and the sliding gear is meshed with the connecting gear for transmission.
Further, the outer edge of the connecting gear is provided with a pawl, the inner edge of the driving gear is provided with a pawl, and the pawl is matched with the pawl to form an inner-meshed ratchet mechanism by the connecting gear and the driving gear.
Further, the transmission gear set further comprises a driven gear, and the driven gear of the same transmission gear set is meshed with the driving gear for transmission.
Further, the gearbox further comprises an output shaft, the driven gear is fixed on the output shaft, and the output shaft synchronously rotates along with the driven gear.
Further, the gearbox further comprises a positioning rod, the sliding block is provided with a sliding hole, the positioning rod penetrates through the sliding hole, the sliding block can slide along the positioning rod, and when the speed regulating screw rotates, the sliding block is screwed in or screwed out on the speed regulating screw under the action of the positioning rod.
Further, the gearbox further comprises an input shaft, the input shaft comprises a shaft disc and a plurality of torsion bars, one end of each torsion bar is fixed on the shaft disc, torsion holes which are equal to the torsion bars in number and used for transmitting torque are formed in the sliding gear, the torsion holes are uniformly distributed along the circumferential direction of the axis of the sliding gear, the torsion bars are correspondingly penetrated in the torsion holes one by one, the sliding gear can slide along the torsion bars, and when external power drives the shaft disc to rotate, the sliding gear can synchronously rotate along with the shaft disc through the torsion bars.
Further, the gearbox further comprises a first rotary positioning sleeve and a second rotary positioning sleeve, the axes of the first rotary positioning sleeve and the second rotary positioning sleeve are collinear with the axes of the speed regulating screw, the first rotary positioning sleeve is positioned at one end of the plurality of transmission gear sets, and the second rotary positioning sleeve is positioned at the other end of the plurality of transmission gear sets; an annular first positioning groove is formed in one side, close to the transmission gear set, of the first rotary positioning sleeve, a first positioning ring matched with the first positioning groove is arranged on one side, close to the first rotary positioning sleeve, of the connecting gear, a first positioning groove is formed in the other side of the connecting gear, and a first positioning ring is arranged on one side, close to the transmission gear set, of the second rotary positioning sleeve; the adjacent first positioning rings are slidably buckled in the first positioning grooves, so that the connecting gears and the speed regulating screw rods are coaxial.
Further, a second positioning groove concentric with the first positioning groove is formed in one side, close to the transmission gear set, of the first rotary positioning sleeve, the radius of the second positioning groove is larger than that of the first positioning groove, a second positioning ring matched with the second positioning groove is arranged on one side, close to the first rotary positioning sleeve, of the driving gear, a second positioning groove is formed in the other side of the driving gear, and a second positioning ring is arranged on one side, close to the transmission gear set, of the second rotary positioning sleeve; the adjacent second positioning rings are slidably buckled in the second positioning grooves, so that the connecting gear and the driving gear are coaxial.
The embodiment of the invention has the following advantages:
According to the gearbox provided by the embodiment of the invention, the speed regulating screw rod drives the sliding block and the sliding gear to axially move, and the sliding gear drives the connecting gear and the driving gear to rotate, so that different driving gears rotate, different transmission ratios are externally output, the speed changing function of the gearbox is met, and the variety of the existing speed regulating device is enriched; moreover, the gearbox of the embodiment does not need to use a gear shifting fork and a sleeve, so that a reserved space is not needed between adjacent driving gears, the axial size of the gearbox is reduced, and the gearbox is smaller as a whole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the scope of the invention.
Fig. 1 is a schematic structural view of a transmission provided in embodiment 1 of the present invention;
Fig. 2 is a schematic diagram of a transmission structure of a gearbox provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a fixing sleeve of a transmission provided in embodiment 1 of the present invention;
Fig. 4 is a schematic structural diagram of a slider and a snap ring of a gearbox according to embodiment 1 of the present invention;
Fig. 5 is a schematic structural view of a sliding gear of a transmission provided in embodiment 1 of the present invention;
Fig. 6 is a schematic structural view of a connecting gear of the transmission provided in embodiment 1 of the present invention;
FIG. 7 is a side view of FIG. 6;
fig. 8 is a schematic structural view of a driving gear of a transmission provided in embodiment 1 of the present invention;
Fig. 9 is a side view (cross-sectional view) of fig. 8;
FIG. 10 is a schematic structural view of a first rotational positioning sleeve of a transmission according to embodiment 1 of the present invention;
Fig. 11 is a schematic structural view of a second rotary positioning sleeve of the transmission according to embodiment 1 of the present invention.
In the figure: 01-a box body;
02-fixing sleeve, 0201-first mounting hole, 0202-second mounting hole;
03-a speed regulating screw;
04-sliding blocks, 0401-threaded holes, 0402-sliding holes and 0403-clamping rings;
05-positioning rod;
06-sliding gears, 0601-torsion holes, 0602-sliding external teeth;
07-input shaft, 0701-shaft disc, 0702-torsion bar;
08-connecting gear, 0801-connecting internal teeth, 0802-pawl;
09-drive gear, 0901-inverted teeth;
10-driven gear;
11-an output shaft;
12-a first rotary positioning sleeve, 1201-a first positioning groove, 1202-a second positioning groove, 1203-a fixed sleeve hole;
13-second rotation position sleeve, 1301-first positioning ring, 1302-second positioning ring.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present invention, and the changes or modifications of the relative relationship thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Example 1
As shown in fig. 1 to 11, embodiment 1 provides a transmission case including a case 01, a fixed sleeve 02, a speed adjusting motor, a speed adjusting screw 03, a slider 04, a positioning rod 05, a sliding gear 06, an input shaft 07, and a transmission gear set.
The box body 01 is a closed shell-shaped mechanism and is provided with opposite wall plates, corresponding shaft holes are formed in the wall plates, end covers are arranged on the outer sides of the shaft holes (the outer sides of the box body 01), and the end covers are respectively used in a matched mode with the shafts, and are used for sealing the shaft holes.
The fixed sleeve 02 is cylindrical, the fixed sleeve 02 is provided with a first mounting hole 0201 positioned on the axis of the fixed sleeve 02 and a second mounting hole 0202 arranged at intervals with the first mounting hole 0201, the first mounting hole 0201 is used for mounting the speed adjusting screw 03, and the second mounting hole 0202 is used for mounting the positioning rod 05. The axis of the fixed sleeve 02 is collinear with the axis of the shaft hole, and two fixed sleeves 02 are respectively positioned in the corresponding shaft holes.
The speed regulating motor is fixed outside the box body 01, and a motor shaft of the speed regulating motor is connected with one end of the speed regulating screw 03.
Both ends of the speed regulating screw 03 are respectively rotatably fixed in the first mounting holes 0201, and one end of the speed regulating screw 03 extends to the outer side of the box body 01 and is connected with a motor shaft of the speed regulating motor. The speed adjusting screw 03 is similar to a screw of a screw system, and an external thread is provided at a portion of the speed adjusting screw 03 located between the two fixing bushes 02. The slider 04 is similar to a nut of a screw system, a screw hole 0401 is provided in the center of the slider 04, and the slider 04 is screwed to the speed adjusting screw 03 through the screw hole 0401. When the speed regulating screw 03 rotates under the drive of the speed regulating motor, the sliding block 04 screwed on the speed regulating screw 03 moves along the axial direction of the speed regulating screw 03, and the principle is the same as that of a screw system.
The slider 04 is provided with a slide hole 0402, the axis of the slide hole 0402 is collinear with the axis of the second mounting hole 0202, and the diameters of the slide hole 0402 and the second mounting hole 0202 are equal. The locating rod 05 is arranged in the sliding hole 0402 in a penetrating mode, and two ends of the locating rod 05 are respectively fixed to the second mounting holes 0202. When the speed regulating screw 03 rotates, under the action of the positioning rod 05, the sliding block 04 rotates on the speed regulating screw 03 or retreats, and the sliding block 04 slides along the positioning rod 05 to prevent the sliding block 04 from rotating along with the speed regulating screw 03. Once the sliding block 04 rotates along with the speed adjusting screw 03, inaccurate axial displacement of the sliding block 04 along the speed adjusting screw 03 can be caused, and speed change failure or failure is caused.
The sliding gear 06 is a power input gear, the sliding gear 06 is sleeved outside the sliding block 04, the sliding gear 06 can freely rotate along the circumferential direction of the sliding block 04, and the sliding gear 06 synchronously moves along the axial direction of the speed regulating screw 03 along with the sliding block 04. In order to restrict the displacement of the slide gear 06 in the axial direction of the slider 04, the following scheme is adopted. In the first alternative (as shown in the figure), an annular limiting groove is formed in the inner ring of the sliding gear 06, an annular mounting groove is formed in the outer ring of the sliding block 04, and the axial positions and the axial widths of the positioning groove and the mounting groove are the same so as to be matched with each other. A snap ring with an opening is sleeved in the mounting groove; under the condition that the opening of the clamping ring is close, the outer diameter of the clamping ring 0403 is equal to the outer diameter of the sliding block 04, so that the clamping ring 0403 is reduced and then is arranged at the position of the limiting groove; after the clamping ring 0403 is opened in place, the outer diameter of the clamping ring 0403 is equal to the large diameter of the groove bottom of the limiting groove, and the clamping ring 0403 is clamped between the mounting groove and the limiting groove to realize axial limiting of the sliding gear 06. In the second alternative (no figure), two ring grooves for installing snap springs are arranged on the sliding block 04, the interval between the ring grooves is equal to the tooth width of the sliding gear 06, the sliding gear 06 is installed on the sliding block 04, and then the snap springs are installed to limit the axial displacement of the sliding gear 06.
Since the speed adjusting screw 03 is disposed at the rotation center, the common gear shaft cannot be connected with the sliding gear 06 for power transmission, and thus a new gear shaft needs to be designed. In the present embodiment, the input shaft 07 is connected with the slide gear 06 to transmit power. Input shaft 07 includes a shaft disc 0701 and a plurality of torsion bars 0702 that are secured at one end to shaft disc 0701. The sliding gear 06 is provided with torsion holes 0601 which are equal to the torsion bars 0702 in number and used for transmitting torque, the torsion holes 0601 are uniformly distributed along the circumferential direction of the axis of the sliding gear 06, the torsion bars 0702 are correspondingly penetrated in the torsion holes 0601 one by one, and the sliding gear 06 can slide along the torsion bars 0702. When the external power drives the shaft disc 0701 to rotate, the torsion bar 0702 enables the sliding gear 06 to synchronously rotate along with the shaft disc 0701. Shaft disc 0701 is connected with external power, such as by fixing a pulley on shaft disc 0701 to a motor or by coupling to a motor shaft, so that shaft disc 0701 needs to be exposed outside of box 01, and the axis of shaft disc 0701 needs to be collinear with the axis of speed-adjusting screw 03. The axis of shaft disc 0701 is collinear with the axis of stationary sleeve 02.
The transmission gear set comprises a connecting gear 08, a driving gear 09 and a driven gear 10, wherein the connecting gear 08 is sleeved outside the sliding gear 06, the connecting gear 08 can synchronously rotate along with the sliding gear 06, the driving gear 09 is sleeved outside the connecting gear 08, the driving gear 09 rotates along with the connecting gear 08, and the driven gear 10 is meshed with the driving gear 09 for transmission. The plurality of transmission gear sets are arranged, the plurality of transmission gear sets are distributed side by side along the axial direction of the speed regulating screw 03, the plurality of driven gears 10 are arranged side by side along the axial direction of the output shaft 11, and the driven gears 10 and the driving gears 09 are in one-to-one external meshed transmission. Wherein, two ends of the output shaft 11 are rotatably fixed on the box body 01, and the axis of the output shaft 11 is parallel to the axis of the speed regulating screw 03. The plurality of groups of transmission gear sets share one sliding gear 06, and the transmission ratio of the driving gear 09 and the driven gear 10 of each group is different, so that speed regulation is realized.
In order to make the connection gear 08 rotate synchronously with the sliding gear 06, the outer edge of the sliding gear 06 is provided with sliding external teeth 0602, the inner edge of the connection gear 08 is provided with connection internal teeth 0801 which are equal to the number of the sliding external teeth 0602 and are meshed with the sliding external teeth, and the sliding gear 06 is meshed with the connection gear 08 for transmission.
In the alternative of this embodiment, the driving gear 09 rotates unidirectionally along the circumferential direction of the connecting gear 08, which facilitates gear shifting and avoids tooth striking. A process in which the shifting, i.e. sliding, gear 06 cooperates with a different connecting gear 08. In order to make the driving gear 09 rotate unidirectionally along the circumferential direction of the connecting gear 08, a pawl 0802 which can extend and retract along the normal direction of the connecting gear 08 is arranged on the outer edge of the connecting gear 08, a pawl 0901 is arranged on the inner edge of the driving gear 09, and the pawl 0802 and the pawl 0901 are matched for use so that the connecting gear 08 and the driving gear 09 form an internal meshing ratchet mechanism. Some driving gear 09 drives the driven gear 10 rather than meshing to make output shaft 11 rotate, other driven gears 10 on the output shaft 11 can drive the driving gear 09 of meshing respectively and rotate, avoid connecting gear 08 idle running through unidirectional drive's design, make things convenient for shifting, avoid making the tooth. The transmission of this embodiment is a one-way drive transmission.
Since there is only one of the sliding gears 06 and there are a plurality of connecting gears 08, when the sliding gear 06 is engaged with one of the connecting gears 08, the axes of the remaining connecting gears 08 are offset from the axes of the speed adjusting screws 03, so that the sliding gear 06 cannot slide to the other connecting gears 08. The gearbox is thus also provided with a first rotational positioning sleeve 12 and a second rotational positioning sleeve 13. The first rotary positioning sleeve 12 and the second rotary positioning sleeve 13 are respectively sleeved in two corresponding shaft holes, and the axes of the first rotary positioning sleeve 12 and the second rotary positioning sleeve 13 are collinear with the axis of the speed regulating screw 03. The first rotary positioning sleeve 12 and the second rotary positioning sleeve 13 are respectively provided with a fixed sleeve hole 1203 coaxial with the shaft hole and used for installing the fixed sleeve 02, and the two fixed sleeves 02 are respectively installed in the fixed sleeve holes 1203. The speed regulating screw 03 and the positioning rod 05 extend out of the box body 01 from one side provided with the speed regulating motor, and the part of the positioning rod 05 outside the box body 1 is connected with the box body 1, so that when the speed regulating screw 03 rotates, the positioning rod 05 can effectively prevent the sliding block 04 and the fixed sleeve 1203 from rotating along the axis of the speed regulating screw 03. The first rotary positioning sleeve 12 is positioned at one end of the plurality of transmission gear sets, and the second rotary positioning sleeve 13 is positioned at the other end of the plurality of transmission gear sets. One side of the first rotating positioning sleeve 12, which is close to the transmission gear set, is provided with a first positioning groove 1201 in a ring shape, one side of the connecting gear 08, which is close to the first rotating positioning sleeve 12, is provided with a first positioning ring 1301 matched with the first positioning groove 1201, the other side of the connecting gear 08 is provided with the first positioning groove 1201, and one side of the second rotating positioning sleeve 13, which is close to the transmission gear set, is provided with the first positioning ring 1301. Adjacent first positioning rings 1301 are slidably engaged in the first positioning groove 1201, so that the connecting gear 08 is coaxial with the speed adjusting screw 03.
Because the ratchet mechanism is arranged between the connecting gear 08 and the driving gear 09, in order to ensure that the axis of the driving gear 09 is always collinear with the axis of the connecting gear 08, a second positioning groove 1202 concentric with the first positioning groove 1201 is arranged on one side of the first rotating positioning sleeve 12 close to the transmission gear set, and the radius of the second positioning groove 1202 is larger than that of the first positioning groove 1201. The side of the driving gear 09, which is close to the first rotating and positioning sleeve 12, is provided with a second positioning ring 1302 matched with the second positioning groove 1202, the other side of the driving gear 09 is provided with the second positioning groove 1202, the second rotating and positioning sleeve 13 is positioned at the other ends of the plurality of transmission gear sets, and one side of the second rotating and positioning sleeve 13, which is close to the transmission gear sets, is provided with the second positioning ring 1302. The adjacent second positioning ring 1302 is slidably engaged in the second positioning groove 1202, so that the connecting gear 08 is coaxial with the driving gear 09.
In order to make the stress of the torsion bar 0702 more reasonable, torsion holes 0601 are formed in the first rotation positioning sleeve 12 and the second rotation positioning sleeve 13, and the torsion bar 0702 is arranged in the torsion holes 0601 of the first rotation positioning sleeve 12 and the second rotation positioning sleeve 13 in a penetrating manner, so that the condition that one end of the torsion bar 0702 is suspended is avoided. The first rotational positioning sleeve 12 and the second rotational positioning sleeve 13 rotate synchronously with the input shaft 07.
According to the gearbox provided by the embodiment, the speed regulating screw 03 drives the sliding block 04 and the sliding gear 06 to axially move, and the sliding gear 06 drives the connecting gear 08 and the driving gear 09 to rotate, so that different driving gears 09 rotate, different transmission ratios are output outwards, the speed changing function of the gearbox is met, and the variety of the existing speed regulating device is enriched; moreover, the gearbox of the embodiment does not need to use a shifting fork and a sleeve, so that a reserved space is not needed between adjacent driving gears 09, the axial size of the gearbox is reduced, and the gearbox is smaller as a whole.
In the present embodiment, the fixed sleeve 02, the speed adjusting screw 03, the slider 04, the sliding gear 06, the shaft disc 0701, the connecting gear 08, the driving gear 09, the first rotation positioning sleeve 12 and the second rotation positioning sleeve 13 are coaxial, and the driven gear 10 and the output shaft 11 are coaxial.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The gearbox is characterized by comprising a speed regulating screw, a sliding block, a sliding gear and a transmission gear set, wherein the sliding block is screwed on the speed regulating screw, the sliding gear is a power input gear, the sliding gear is sleeved outside the sliding block, the sliding gear can freely rotate along the circumferential direction of the sliding block, the sliding gear synchronously moves along the axial direction of the speed regulating screw along with the sliding block, the transmission gear set comprises a connecting gear and a driving gear, the connecting gear is sleeved outside the sliding gear, the connecting gear can synchronously rotate along with the sliding gear, the driving gear is sleeved outside the connecting gear, and the driving gear rotates along with the connecting gear;
The plurality of transmission gear sets are arranged and are distributed side by side along the axial direction of the speed regulating screw rod;
The gearbox further comprises an input shaft, the input shaft comprises a shaft disc and a plurality of torsion bars, one ends of the torsion bars are fixed on the shaft disc, torsion holes which are equal to the torsion bars in number and used for transmitting torque are formed in the sliding gear, the torsion holes are uniformly distributed along the circumferential direction of the axis of the sliding gear, the torsion bars are correspondingly penetrated in the torsion holes one by one, the sliding gear can slide along the torsion bars, and when external power drives the shaft disc to rotate, the sliding gear synchronously rotates along with the shaft disc through the torsion bars;
The gearbox further comprises a first rotary positioning sleeve and a second rotary positioning sleeve, the axes of the first rotary positioning sleeve and the second rotary positioning sleeve are collinear with the axes of the speed regulating screw, the first rotary positioning sleeve is positioned at one end of the plurality of transmission gear sets, and the second rotary positioning sleeve is positioned at the other end of the plurality of transmission gear sets; an annular first positioning groove is formed in one side, close to the transmission gear set, of the first rotary positioning sleeve, a first positioning ring matched with the first positioning groove is arranged on one side, close to the first rotary positioning sleeve, of the connecting gear, a first positioning groove is formed in the other side of the connecting gear, and a first positioning ring is arranged on one side, close to the transmission gear set, of the second rotary positioning sleeve; the adjacent first positioning rings are slidably buckled in the first positioning grooves, so that the connecting gears and the speed regulating screw rods are coaxial.
2. The gearbox according to claim 1, wherein the outer edge of the sliding gear is provided with sliding external teeth, the inner edge of the connecting gear is provided with connecting internal teeth which are equal to the number of the sliding external teeth and are used in a meshed mode, and the sliding gear is meshed with the connecting gear for transmission.
3. The gearbox of claim 1, wherein the driving gear rotates unidirectionally along the circumferential direction of the connecting gear, a pawl is arranged on the outer edge of the connecting gear, a pawl is arranged on the inner edge of the driving gear, and the pawl is matched with the pawl to enable the connecting gear and the driving gear to form an internal meshing type ratchet mechanism.
4. The transmission of claim 1, wherein the drive gear set further comprises a driven gear, the driven gear of the same drive gear set being in meshed communication with the drive gear.
5. The transmission of claim 4, further comprising an output shaft, wherein the driven gear is fixed to the output shaft and wherein the output shaft rotates synchronously with the driven gear.
6. The gearbox of any one of claims 1-5, further comprising a positioning rod, wherein the sliding block is provided with a sliding hole, the positioning rod is arranged through the sliding hole in a penetrating manner, the sliding block can slide along the positioning rod, and when the speed regulating screw rotates, the sliding block is screwed in or out on the speed regulating screw under the action of the positioning rod.
7. The gearbox according to claim 1, wherein a second positioning groove concentric with the first positioning groove is formed in one side, close to the transmission gear set, of the first rotary positioning sleeve, the radius of the second positioning groove is larger than that of the first positioning groove, a second positioning ring matched with the second positioning groove is arranged on one side, close to the first rotary positioning sleeve, of the driving gear, a second positioning groove is formed in the other side, close to the transmission gear set, of the driving gear, and a second positioning ring is arranged on one side, close to the transmission gear set, of the second rotary positioning sleeve; the adjacent second positioning rings are slidably buckled in the second positioning grooves, so that the connecting gear and the driving gear are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910828647.6A CN110425258B (en) | 2019-09-03 | 2019-09-03 | Gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910828647.6A CN110425258B (en) | 2019-09-03 | 2019-09-03 | Gear box |
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| CN110425258A CN110425258A (en) | 2019-11-08 |
| CN110425258B true CN110425258B (en) | 2024-05-31 |
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| CN201910828647.6A Active CN110425258B (en) | 2019-09-03 | 2019-09-03 | Gear box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111097329A (en) * | 2020-01-14 | 2020-05-05 | 王凯 | Quick preparation device of lathe cutting fluid for machine-building |
| CN112128320B (en) * | 2020-07-30 | 2022-11-22 | 艾其宽 | Gear box |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109838510A (en) * | 2019-03-29 | 2019-06-04 | 牛清锋 | Manual transmission is alternately exported side by side |
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| CN210978404U (en) * | 2019-09-03 | 2020-07-10 | 郭宁波 | Gear box |
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| KR101029868B1 (en) * | 2009-07-31 | 2011-04-15 | (주)유티글로벌 | Multi stage automatic transmission |
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| CN1059395A (en) * | 1990-08-30 | 1992-03-11 | 曾盛财 | Speed changer |
| WO2007118351A1 (en) * | 2006-04-14 | 2007-10-25 | Tseng, Weifu | Dynamic speed regulator |
| CN104930136A (en) * | 2015-05-31 | 2015-09-23 | 曹建峰 | Gear control gearbox |
| CN106523606A (en) * | 2016-11-04 | 2017-03-22 | 福州麦辽自动化设备有限公司 | Multi-layer-tooth-gear automatic transmission based on volute spiral spring |
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| CN109854689A (en) * | 2019-01-31 | 2019-06-07 | 牛清锋 | Inner bearing type gearshift gearbox |
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| CN210978404U (en) * | 2019-09-03 | 2020-07-10 | 郭宁波 | Gear box |
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| Publication number | Publication date |
|---|---|
| CN110425258A (en) | 2019-11-08 |
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