CN210423605U

CN210423605U - Gear transmission case with two output shafts capable of reversely rotating

Info

Publication number: CN210423605U
Application number: CN201920604649.2U
Authority: CN
Inventors: 向青茂
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-04-28
Anticipated expiration: 2029-04-29

Abstract

When the power input shaft rotates at a constant speed, the rotation directions of a sliding gear with teeth meshing on the fourth shaft and a reverse rotating gear are opposite all the time through the rotation of the front three shafts, so that the left half shaft and the right half shaft of the fifth shaft are driven to rotate reversely, and the effect of reverse rotation of the locomotive is achieved. The utility model is suitable for an agricultural machine and transportation vehicles and war chariot with running gear.

Description

Gear transmission case with two output shafts capable of reversely rotating

Technical Field

The utility model relates to a agricultural machine, the multi-purpose gear box of transportation, in particular to two output shafts can reverse pivoted gear box.

Background

At present, gears of agricultural machines and traffic vehicle walking gear boxes on the market can not reversely rotate, a locomotive needs to wind a large bend when turning around or turning, and when the field is not wide enough, the turning and turning are realized by adopting a plurality of steps, so that time is delayed, power is consumed, and particularly, the loose structure of soil can be damaged when the agricultural machines repeatedly roll the ground.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is, overcome the above-mentioned defect that current gear change case exists, provide a two output shaft can reverse pivoted gear change case, through the gearbox can realize the reverse rotation of vehicle drive wheel, reaches the effect that the locomotive can use the center to change the circle as the centre of a circle.

The technical proposal adopted by the utility model for solving the technical problems is that the gear box with two output shafts capable of reversely rotating comprises a gear box body, one end outside the gear box body is provided with a power input shaft, the part of the power input shaft extending into the gear box body is a hollow pipe, the hollow pipe is provided with an outer gear, a first-stage variable sliding gear capable of sliding is arranged on the outer gear of the hollow pipe, the first-stage variable sliding gear is provided with an inner gear and an outer gear,

two speed change shafts are arranged, and each speed change shaft comprises a primary speed change shaft and a secondary speed change shaft, one end of each primary speed change shaft is inserted into the hollow pipe, and the other end of each primary speed change shaft extends out of the gear box body and can rotate but cannot move axially; a spline is arranged on the primary speed changing shaft, one end of the spline is fastened with a first small gear set, and the size of a pinion of the first small gear set is equal to that of an outer gear of the hollow pipe; the other end of the spline is provided with a two-stage variable-speed sliding gear set which can axially slide and cannot rotate mutually; two ends of the secondary speed changing shaft are provided with carrier gears, one end close to the power input shaft is provided with a large gear set and a small gear set which can rotate around the shaft, small gears of the large gear set and the small gear set are meshed with a large gear of the first large gear set, and large gears of the large gear set and the small gear set can be meshed with the primary speed changing sliding gear and can also leave; the other end of the secondary variable-speed shaft is fastened with a second small and large transmission gear set, and the second small and large transmission gear set can be correspondingly meshed with the second small and large transmission gear set respectively when the secondary variable-speed large and small sliding gear set slides axially; the middle part of the second-stage speed change shaft is provided with a third-stage speed change large-small sliding transmission gear set capable of axially sliding; one end of the secondary speed change shaft extends out of the gear box body, and two sides of the secondary speed change shaft are arranged on the side surface of the gear box body through bearing seats and can rotate;

the gear box body is also provided with a third shaft, a fourth shaft and a fifth shaft, wherein a medium and small gear set is arranged in the middle of the third shaft, and when a three-stage speed change large and small sliding gear set axially slides, the medium gear and the large gear of the medium and small gear set are respectively meshed, so that the third shaft rotates at multiple speeds; the transmission gears are fastened at two ends of the third shaft and are meshed with the intermediate gears at two ends of the second-stage speed change shaft; two ends of the third shaft are arranged on the side surface of the gear box body through bearing seats and can rotate; the fourth shaft is arranged in bilateral symmetry, and two ends of the fourth shaft are arranged on the side face of the gear transmission box body through bearing seats and can rotate; a transmission gear with nipping openings at two sides is fastened in the middle of the fourth shaft and is meshed with a small gear in the middle of the small and medium large gear set; sliding gears with engaging teeth are arranged on two sides of the transmission gear with the engaging opening, and the sliding gears with the engaging teeth can rotate around a shaft and can axially slide; a concave clamping groove is formed in the periphery of the sliding gear with the meshing teeth, a pushing disc with internal teeth is arranged in the clamping groove, and the pushing disc is clamped by a shaft clamping spring to prevent the pushing disc from freely withdrawing; a spring is arranged between the sliding gear with the teeth and the fourth shaft, one end of the spring is propped against a bearing seat of the fourth shaft, and the other end of the spring is arranged on the inner side of the sliding gear with the teeth to push the sliding gear with the teeth towards the middle; the sliding gear with the engaged teeth is provided with more than two friction sheets with the internal gear at one end close to the bearing seat, and the friction sheets with the internal gear are engaged on the sliding gear with the engaged teeth, can slide mutually but cannot rotate mutually; a friction sheet with external teeth is arranged between the friction sheets with the internal gears; the friction sheet with the internal gear and the friction sheet with the external gear are assembled in a basin cavity on the reverse rotating gear, and on the basin cavity wall

The transmission grooves are symmetrically arranged, and the external teeth of the friction plate with the external teeth are sleeved in the transmission grooves; the bottom of the basin cavity is also provided with a step which can prevent the friction sheet from moving outwards; a bearing is arranged in the step, and a plane bearing is arranged outside a bearing seat of the bearing; the reverse rotating gear can rotate around the shaft and is integrated with the bearing seat and meshed with the intermediate gear of the second speed changing shaft; the fifth shaft is two half shafts which are symmetrical left and right, splines are arranged on the left half shaft and the right half shaft respectively, a single-side transmission gear is fastened on the splines and meshed with a sliding gear with meshed teeth on the fourth shaft, and the left half shaft and the right half shaft extend out of the side face of the gear transmission case respectively to drive a driving wheel to work.

The utility model has the advantages that: 1. the left half shaft and the right half shaft of the fifth shaft rotate reversely by friction force, so that the damage of impact force to the gear and the transmission shaft is reduced to the maximum extent; 2. the problem that the surface layer of the soil is repeatedly rolled to damage the soil when the agricultural machine turns around at the side of the field is solved; 3. the operation time of turning or turning around the locomotive is saved; 4. the power consumption of the locomotive during turning or turning is saved.

Drawings

Figure 1 is a cross-sectional view of an embodiment of the invention;

FIG. 2 is a schematic illustration of the relative positions of the five axes in the embodiment of FIG. 1;

FIG. 3 is a view of the embodiment of FIG. 1 with a toothed sliding gear;

FIG. 4 is a drawing of the push plate of the embodiment of FIG. 1;

figure 5 is a diagram of an abrasive sheet assembly in the embodiment of figure 1.

In the figure: 1. the transmission device comprises a power input shaft, 2, a primary speed change sliding gear, 3, a primary speed change shaft, 4, a first small and large gear set, 5, a secondary speed change large and small sliding gear set, 6, a secondary speed change shaft, 7, a carrier gear, 8, a large gear set, 9, a second small and large gear set, 10, a tertiary speed change large and small sliding gear set, 11, a third shaft, 12, a small and large gear set, 13, a transmission gear, 14, a transmission gear with meshing on two sides, 15, a fourth shaft, 16, a sliding gear with meshing, 17, a spring, 18, an abrasive sheet with an inner gear, 19, an abrasive sheet with outer teeth, 20, a transmission groove, 21, a reverse rotation gear, 22, a plane bearing, 23, a pushing disc, 24, a basin cavity, 25, a fifth shaft, 26 and a single-side transmission gear.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the present embodiment includes a gear box, a power input shaft 1 is arranged at one end outside the gear box, a driving wheel with a clutch is fastened on the power input shaft 1, the part of the power input shaft 1 extending into the gear box is a hollow pipe, the hollow pipe is provided with an external gear, a first-level variable sliding gear 2 is arranged on the external gear of the hollow pipe, and the structure of the first-level variable sliding gear 2 is as follows: the inner gear is meshed with the outer gear of the hollow pipe, can axially slide and cannot rotate mutually, one side of the first-stage variable-speed sliding gear 2 extends out of a concave step, a shifting fork is arranged on the step, the shifting fork extends out of a gear transmission box and is connected with a fast-stop and slow-control lever, and the first-stage variable-speed sliding gear 2 can be axially shifted by a push-pull control lever;

two speed change shafts are arranged, and each speed change shaft comprises a primary speed change shaft 3 and a secondary speed change shaft 6, one end of each primary speed change shaft 3 is arranged in the hollow pipe through a needle bearing, and the other end of each primary speed change shaft extends out of the gear transmission box body and can rotate but cannot move axially; a spline is arranged on the periphery of the first-stage speed change shaft, one end of the spline is fastened with the first small gearwheel group 4, the sizes of the pinion of the first small gearwheel group 4 and the external gear of the hollow pipe are equal, when the first-stage speed change sliding gear 2 slides towards the middle, the internal gear of the first-stage speed change sliding gear 2 can be sleeved on the external gears of the hollow pipe and the pinion of the first small gearwheel group 4, and at the moment, the power on the power input shaft 1 can drive the first-stage speed change shaft to synchronously rotate through the first-stage speed change sliding gear 2; the other end of the spline of the primary speed changing shaft 3 is provided with a secondary speed changing large and small sliding gear set 5, a shifting fork is arranged on the secondary speed changing large and small sliding gear set, the shifting fork is connected with a high-low speed control rod, and the secondary speed changing large and small sliding gear set 5 can be axially shifted by pushing and pulling the high-low speed control rod; a brake is arranged at one end of the primary speed changing shaft extending out of the gear speed changing box body; the brake and the transmission wheel with the clutch are in linkage assembly, when the clutch is pulled open, the power input shaft loses power and does not rotate, and meanwhile, the brake brakes the primary speed changing shaft and cannot rotate; when the clutch is closed, the power input shaft rotates, and meanwhile, the brake is released to lose the braking effect;

two ends of the second-stage speed change shaft 6 are provided with carrier gears 7, and the second-stage speed change shaft 6 close to one end of the power input shaft 1 is provided with a gear

A big gear set 8 and a small gear set 8 which can rotate around a shaft are arranged, a small gear of the big gear set 8 is meshed with a big gear of a first big gear set 4 on a first-stage speed change shaft, and a big gear of the big gear set and the small gear set can be meshed with a first-stage speed change sliding gear and can also be separated from the first-stage speed change sliding gear; when in occlusion, the power of the power input shaft drives the big gear of the big gear set and the small gear set through the first-stage speed change sliding gear 2, so that the big gear set 8 is decelerated and then reversed, and then the big gear set 8 drives the first big gear set 4, the first-stage speed change shaft 3 and the second-stage speed change big and small sliding gear set 5 to rotate in a decelerating way; the other end of the secondary speed-changing shaft 6 is fastened with a second small and large gear set 9, and when the secondary speed-changing large and small sliding gear sets 5 slide axially, the secondary speed-changing large and small sliding gear sets can be correspondingly meshed with the second small and large gear sets 9 respectively, and then the secondary speed-changing shaft 6 is driven to rotate reversely at different speeds; the middle part of the second-stage speed change shaft 6 is sleeved with a third-stage speed change large and small sliding gear set 10 capable of axially sliding, one side of the third-stage speed change large and small sliding gear set is concavely provided with a shifting fork position, a shifting fork is arranged on the shifting fork position, the sliding gear set can be axially shifted through the shifting fork, the second-stage speed change shaft 6 is rotatably assembled on the side surface of a gear box body through a bearing seat, and the other end of the second-stage speed change shaft extends out of;

the gear box body is also provided with a third shaft 11, a fourth shaft 15 and a fifth shaft 25, wherein a small and medium gear set 12 is arranged in the middle of the third shaft 11, and when a three-stage speed change large and small sliding gear set 10 axially slides, the small and medium gear set 12 and the medium gear set respectively engage with the large and medium gears on two sides of the small and medium gear set 12, so that the third shaft can rotate at multiple speeds; two ends of the third shaft are provided with transmission gears 13, and the transmission gears are meshed with the intermediate gears at two ends of the second-stage speed change shaft 6, so that the intermediate gears rotate; both ends of the third shaft are rotatably arranged on the side surface of the gear transmission case body through bearing seats;

the fourth shaft 15 is arranged in bilateral symmetry, two ends of the fourth shaft are arranged on the side face of the gear transmission box body through bearing seats, and the fourth shaft can rotate in the bearing seats; a transmission gear 14 with two side seaming is fastened in the middle of the fourth shaft and is meshed with the small gear of the small and medium gear set 12; two sides of the transmission gear 14 with the meshing on two sides are provided with sliding gears 16 with meshing teeth, and the sliding gears 16 with meshing teeth can rotate around a shaft and can axially slide; a concave clamping groove is formed in the middle of the sliding gear with the meshing teeth, a pushing disc 23 with an internal gear is arranged in the clamping groove, and the pushing disc is clamped by a shaft clamping spring to prevent the pushing disc from freely withdrawing; a spring 17 is arranged between the sliding gear 16 with the teeth and the fourth shaft, one end of the spring is propped against the bearing seat, and the other end of the spring is arranged on the inner side of the sliding gear, so that the teeth of the sliding gear 16 with the teeth can be meshed with the teeth of the transmission gears 14 with the teeth on two sides under normal conditions; the sliding gear 16 with the teeth are close to one end of the bearing seat, and a plurality of friction sheets 18 with the internal gear are sleeved on the sliding gear 16 with the teeth, and the friction sheets 18 with the internal gear are meshed on the sliding gear 16 with the teeth and can slide mutually but cannot rotate mutually; a friction plate 19 with external teeth is arranged between the friction plates with the internal gear; the friction sheet with the internal gear and the friction sheet 19 with the external gear are assembled in a basin cavity 24 on a reverse rotating gear 21, transmission grooves 20 are symmetrically arranged on the wall of the basin cavity, and the external gear of the friction sheet 19 with the external gear is sleeved in the transmission grooves; the bottom of the basin cavity is also provided with a step which can prevent the friction sheet from moving outwards; a bearing is arranged in the step, and a plane bearing 22 is arranged outside a bearing seat of the bearing; the reverse rotating gear 21 is rotatably arranged on the bearing seat and meshed with the intermediate gear of the second speed changing shaft;

the fifth shaft 25 is a left half shaft and a right half shaft, splines are respectively arranged on the left half shaft and the right half shaft, a single-side transmission gear 26 is fastened on the splines, the single-side transmission gear is meshed with the sliding gear 16 with meshed teeth on the fourth shaft, and the left half shaft and the right half shaft respectively extend out of two ends of the gear box body to drive a driving wheel to work.

When the speed-changing sliding gear set works, the power input shaft 1 rotates at a constant speed, and when the first-stage speed-changing sliding gear 2 is close to the side, the large gear of the large gear set 8 is engaged, so that the large gear set 8 and the small gear set 8 are reversely rotated; then, a first small large gear set 4, a first-stage speed change shaft 3 and a second-stage speed change large and small sliding gear set 5 are driven by small gears of a large gear set 8 to rotate in a speed reduction manner, and the rotation direction is the same as that of the power input shaft 1; when the first-stage variable-speed sliding gear 2 is shifted towards the middle, the first-stage variable-speed sliding gear 2 leaves the big gear set 8 and the small gear set 8, and the power input shaft 1 idles; the first-stage speed-changing sliding gear 2 is shifted towards the middle, and the first-stage speed-changing sliding gear 2 is meshed with the small gear of the first small and large gear set 4, so that the first small and large gear set, the first-stage speed-changing shaft 3 and the second-stage speed-changing large and small sliding gear set 5 generate rotating speeds equal to the power input shaft 1, and therefore the first-stage speed-changing shaft can obtain two slow and fast rotating speeds;

when the secondary speed-change large-small sliding gear set 5 is shifted by two slow and fast rotating speeds on the primary speed-change shaft, the secondary speed-change large-small sliding gear set 5 is respectively meshed with and drives a second large small gear set 9 fastened on the secondary speed-change shaft 6, and the secondary speed-change shaft 6 obtains 4 different rotating speeds; 4 different rotating speeds are used for shifting the three-stage variable speed sliding gear set 10 on the secondary variable speed shaft, so that large and small gears of the three-stage variable speed sliding gear set 10 are respectively meshed with the large and medium gears on two sides of the large and medium gear set 12 on the third shaft 11, and the third shaft 11 and the transmission gear 13 are driven to rotate at 8 different speeds;

meanwhile, a pinion in the middle of the small and medium gear set 12 is meshed with the transmission gears 14 with the nipples on two sides, so that the transmission gears with the nipples on two sides rotate clockwise at 8 different speeds; the transmission gear 13 is meshed with the intermediate gear 7, so that the intermediate gear 7 rotates at 8 different speeds, and drives the reverse rotating gear 21 on the fourth shaft 15 to rotate reversely at 8 different rotating speeds, so that the friction plate 19 with the external teeth also rotates reversely;

the sliding gears 16 with teeth arranged symmetrically on the fourth shaft 15 are under the action of the elastic force of the spring 17, so that the teeth of the sliding gears with teeth are inserted into the transmission gears 14 with teeth on two sides, and the sliding gears 16 with teeth are driven to rotate clockwise at 8 different speeds; when the push disc 23 is shifted towards the bearing seat by an external force which is larger than the elastic force of the spring, the teeth of the sliding gear 16 with teeth are disengaged from the teeth of the transmission gears 14 with teeth on two sides, and the sliding gear with teeth loses power and stops rotating; then the pushing disc 23 is pushed forcibly, the pushing disc presses the friction sheet 18 with the internal gear and the friction sheet 19 with the external gear tightly, and the friction sheet with the internal gear rotates reversely at 8 different speeds through friction;

the sliding gear with the meshing teeth is always meshed with the single-side transmission gear 26 of the fifth shaft 25 no matter which direction the sliding gear slides, and can drive the single-side transmission gear 26 and the fifth shaft 25 to rotate clockwise, stop rotating or rotate reversely at 8 different speeds.

Therefore, when the power input shaft 1 rotates at a constant speed, the rotating directions of the sliding gear 16 with the engaged teeth and the reverse rotating gear 21 on the fourth shaft are always opposite, when the pushing disc on one side is pulled, the side is reverse rotation, and the other side is not pulled and is clockwise rotation, so that the effect of reverse rotation of the two output shafts is achieved.

Claims

1. A gear box with two output shafts capable of reversely rotating comprises a gear box body, one end of the outer side of the gear box body is provided with a power input shaft, and the gear box is characterized in that,

the part of the power input shaft extending into the gear speed changing box body is a hollow pipe, the hollow pipe is provided with an external gear, a slidable primary speed changing sliding gear is arranged on the external gear of the hollow pipe, and the primary speed changing sliding gear is provided with an internal gear and an external gear;

the gear box body is also provided with a third shaft, a fourth shaft and a fifth shaft, wherein a medium and small gear set is arranged in the middle of the third shaft, and when a three-stage speed change large and small sliding gear set axially slides, the medium gear and the large gear of the medium and small gear set are respectively meshed, so that the third shaft rotates at multiple speeds; the transmission gears are fastened at two ends of the third shaft and are meshed with the intermediate gears at two ends of the second-stage speed change shaft; two ends of the third shaft are arranged on the side surface of the gear box body through bearing seats and can rotate; the fourth shaft is arranged in bilateral symmetry, and two ends of the fourth shaft are arranged on the side face of the gear transmission box body through bearing seats and can rotate; a transmission gear with nipping openings at two sides is fastened in the middle of the fourth shaft and is meshed with a small gear in the middle of the small and medium large gear set; sliding gears with engaging teeth are arranged on two sides of the transmission gear with the engaging opening, and the sliding gears with the engaging teeth can rotate around a shaft and can axially slide; a concave clamping groove is formed in the periphery of the sliding gear with the meshing teeth, a pushing disc with internal teeth is arranged in the clamping groove, and the pushing disc is clamped by a shaft clamping spring to prevent the pushing disc from freely withdrawing; a spring is arranged between the sliding gear with the teeth and the fourth shaft, one end of the spring is propped against a bearing seat of the fourth shaft, and the other end of the spring is arranged on the inner side of the sliding gear with the teeth to push the sliding gear with the teeth towards the middle; the sliding gear with the engaged teeth is provided with more than two friction sheets with the internal gear at one end close to the bearing seat, and the friction sheets with the internal gear are engaged on the sliding gear with the engaged teeth, can slide mutually but cannot rotate mutually; a friction sheet with external teeth is arranged between the friction sheets with the internal gears; the friction sheet with the inner gear and the friction sheet with the outer teeth are assembled in a basin cavity on the reverse rotating gear, transmission grooves are symmetrically arranged on the basin cavity wall, and the outer teeth of the friction sheet with the outer teeth are sleeved in the transmission grooves; the bottom of the basin cavity is also provided with a step which can prevent the friction sheet from moving outwards; a bearing is arranged in the step, and a plane bearing is arranged outside a bearing seat of the bearing; the reverse rotating gear can rotate around the shaft and is integrated with the bearing seat and meshed with the intermediate gear of the second speed changing shaft; the fifth shaft is two half shafts which are symmetrical left and right, splines are arranged on the left half shaft and the right half shaft respectively, a single-side transmission gear is fastened on the splines and meshed with a sliding gear with meshed teeth on the fourth shaft, and the left half shaft and the right half shaft extend out of the side face of the gear transmission case respectively to drive a driving wheel to work.