阅读说明：本技术 一种变速箱 (Gear box ) 是由 艾其宽 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种变速箱,包括固定架、输入轴、主动齿轮组、变速齿轮组、变速齿轮轴、调速杆、换位档杆；变速齿轮轴的数量和变速齿轮组的变速齿轮的数量相同,变速齿轮组的各个变速齿轮通过各个变速齿轮轴独立与固定架转动连接,变速齿轮轴的中部沿圆周阵列分布有固定孔；调速杆的中部沿其轴线设有限位滑槽,换位档杆一端固连有顶块,调速杆上滑动连接有与各个固定孔配合的固定柱。本发明利用调速杆与换位档杆的配合实现变速,不需用离合器,使变速箱整体结构减小,同时变速更流畅、变速齿轮与变速齿轮轴连接更牢固可靠,不会发生打滑,制造成本降低,操作方便,变速准确可靠,具有很好的实用性。(The invention discloses a gearbox, which comprises a fixed frame, an input shaft, a driving gear set, a speed change gear shaft, a speed regulating rod and a transposition gear rod, wherein the input shaft is connected with the driving gear set; the number of the speed change gear shafts is the same as that of the speed change gears of the speed change gear sets, each speed change gear of the speed change gear sets is independently and rotatably connected with the fixed frame through each speed change gear shaft, and fixed holes are distributed in the middle of each speed change gear shaft along the circumferential array; the middle part of the speed regulating rod is provided with a limiting sliding chute along the axis of the speed regulating rod, one end of the transposition gear lever is fixedly connected with a top block, and the speed regulating rod is connected with fixing columns matched with the fixing holes in a sliding mode. The invention realizes speed change by utilizing the matching of the speed regulating rod and the transposition gear rod, does not need a clutch, reduces the whole structure of the gearbox, has smoother speed change, firmer and more reliable connection of the speed change gear and the speed change gear shaft, does not generate slipping, reduces the manufacturing cost, is convenient to operate, has accurate and reliable speed change and has good practicability.)

1. A transmission, characterized by: the device comprises a fixing frame (1), an input shaft (2) rotationally connected with the fixing frame (1), a driving gear set (3) fixedly connected on the input shaft (2), and a speed change gear set (4) matched with the driving gear set (3), wherein all speed change gears of the speed change gear set (4) are coaxial, and all driving gears of the driving gear set (3) are always meshed with all corresponding speed change gears of the speed change gear set (4);

the gearbox comprises variable speed gear shafts (5), the number of the variable speed gear shafts (5) is the same as that of variable speed gears of the variable speed gear sets (4), each variable speed gear of the variable speed gear sets (4) is independently and rotatably connected with the fixed frame (1) through each variable speed gear shaft (5), each variable speed gear of the variable speed gear sets (4) is fixedly connected with each variable speed gear shaft (5), the variable speed gear shafts (5) are of a pipe structure, and fixed holes (6) are distributed in the middle of each variable speed gear shaft (5) along the circumferential array;

the gearbox comprises a speed adjusting rod (7) and a transposition gear rod (8), the speed adjusting rod (7) penetrates through the inner part of the speed changing gear shaft (5), a limiting sliding groove (16) is arranged in the middle of the speed regulating rod (7) along the axis of the speed regulating rod, one end of the transposition gear lever (8) is fixedly connected with a top block (9) matched with the limiting sliding groove (16), the transposition blocking rod (8) drives the ejector block (9) to slide relative to the limiting sliding groove (16), the speed regulating rod (7) is connected with fixing columns (10) matched with the fixing holes (6) in a sliding manner, the ends, close to the axis of the speed regulating rod (7), of the fixing columns (10) extend into the limiting sliding chutes (16) in a natural state, the other ends of the fixing columns (10) retract into the speed regulating rod (7), when the top block (9) passes through the fixed column (10), a part of the fixed column (10) extends out of the speed regulating rod (7) and is matched with the fixed hole (6).

2. A transmission according to claim 1, wherein: the spring (11) is sleeved on the outer side of the fixed column (10), one end of the spring (11) is fixedly connected with the fixed column (10), and the other end of the spring (11) is fixedly connected with the speed regulating rod (7), so that the fixed column (10) is ensured to be always retracted into the speed regulating rod (7) in the initial state.

3. A transmission according to claim 1, wherein: each driving gear of driving gear group (3) links firmly in same input shaft (2), when input shaft (2) rotated, drives each driving gear of driving gear group (3) rotates simultaneously, makes each speed change gear of speed change gear group (4) rotate simultaneously.

4. A transmission according to claim 1, wherein: the end, far away from the ejector block (9), of the transposition blocking rod (8) is provided with a hydraulic telescopic rod (12), the extending direction of the hydraulic telescopic rod (12) is the same as that of the transposition blocking rod (8), the rod body of the hydraulic telescopic rod (12) is rotatably connected with the transposition blocking rod (8), and the rod body of the hydraulic telescopic rod (12) is fixed with the outside.

5. A transmission according to claim 1, wherein: speed adjusting rod (7) rotate with mount (1) and are connected, output gear (13) have been linked firmly on speed adjusting rod (7), rotate on mount (1) and be connected with first driven gear (14) with output gear (13) meshing, with first driven gear (14) coaxial pivoted second driven gear (15), second driven gear (15) are used for output torque.

6. A transmission according to claim 1, wherein: the limiting sliding groove (16) is a cross sliding groove, the ejector block (9) is a cross ejector block, the end, close to the fixing hole (6), of the fixing column (10) is chamfered, and chamfering is performed at two ends of the ejector block (9) in the sliding direction.

7. A transmission according to claim 1, wherein: the number of the driving gears of the driving gear set (3) and the number of the speed change gears of the speed change gear set (4) are set according to the actual required speed change gear number, and the number of the driving gears of the driving gear set (3) and the number of the speed change gears of the speed change gear set (4) are 18 according to the gear requirement of the truck.

8. A transmission according to claim 1, wherein: the length of the top block (9) in the sliding direction is smaller than the distance between the axially adjacent fixed columns (10) on the speed adjusting rod (7).

Technical Field

The invention relates to the technical field of gearboxes, in particular to a gearbox.

Background

With the development of industry, machines such as automobiles, ships, machine tools and the like generally need to be provided with a gear box to realize the conversion of rotating speed, speed changing gears and spline shafts of most existing gear boxes are connected through sleeves, the speed changing gears freely rotate on the spline shafts, the sleeves can rotate along with the spline shafts and can freely slide on the spline shafts to engage with the speed changing gears, and the speed changing gears can rotate along with the spline shafts. The speed changing mode causes the whole structure of the gearbox to be large, the speed changing gear is unstable when being matched with the spline shaft, and the manufacturing cost is high.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the technology and provide a gearbox.

In order to solve the technical problem, the technical scheme provided by the invention is that the gearbox comprises the following components: the driving gear set is fixedly connected with the input shaft, and the speed change gear set is matched with the driving gear set; the gearbox comprises variable speed gear shafts, the number of the variable speed gear shafts is the same as that of variable speed gears of the variable speed gear sets, each variable speed gear of the variable speed gear sets is independently and rotatably connected with the fixing frame through each variable speed gear shaft, each variable speed gear of the variable speed gear sets is fixedly connected with each variable speed gear shaft, the variable speed gear shafts are of a pipe structure, and fixing holes are distributed in the middle of the variable speed gear shafts in a circumferential array manner; the gearbox comprises a speed adjusting rod and a transposition gear rod, the speed adjusting rod penetrates through the inside of a speed changing gear shaft, a limiting sliding groove is formed in the middle of the speed adjusting rod along the axis of the speed adjusting rod, one end of the transposition gear rod is fixedly connected with an ejector block matched with the limiting sliding groove, the transposition gear rod drives the ejector block to slide relative to the limiting sliding groove, fixing columns matched with all fixing holes are connected to the speed adjusting rod in a sliding mode, the end, close to the speed adjusting rod, of each fixing column extends into the limiting sliding groove in a natural state, the other end of each fixing column retracts into the speed adjusting rod, and when the ejector block passes through the fixing column, one part of each fixing column extends out of the speed adjusting rod and is matched.

As an improvement, a spring is sleeved outside the fixed column, one end of the spring is fixedly connected with the fixed column, and the other end of the spring is fixedly connected with the speed regulating rod, so that the fixed column is ensured to be always retracted into the speed regulating rod in an initial state.

As an improvement, all driving gears of the driving gear set are fixedly connected to the same input shaft, and when the input shaft rotates, all driving gears of the driving gear set are driven to rotate simultaneously, so that all speed change gears of the speed change gear set rotate simultaneously.

As an improvement, a hydraulic telescopic rod is arranged at the end, far away from the top block, of the transposition blocking rod, the extending direction of the hydraulic telescopic rod is the same as that of the transposition blocking rod, the rod body of the hydraulic telescopic rod is rotatably connected with the transposition blocking rod, and the rod body of the hydraulic telescopic rod is fixed with the outside.

As an improvement, the speed adjusting rod is rotatably connected with the fixing frame, the speed adjusting rod is fixedly connected with an output gear, the fixing frame is rotatably connected with a first driven gear meshed with the output gear and a second driven gear coaxially rotating with the first driven gear, and the second driven gear is used for outputting torque.

As an improvement, the limiting sliding groove is a cross sliding groove, the ejecting block is a cross ejecting block, the end, close to the fixing hole, of the fixing column is chamfered, and chamfering is performed at two ends of the ejecting block in the sliding direction.

As an improvement, the number of the driving gears of the driving gear set and the number of the speed change gears of the speed change gear set are set according to the actual required speed change gear number, and the number of the driving gears of the driving gear set and the number of the speed change gears of the speed change gear set are both 18 according to the gear requirement of the truck.

As an improvement, the length of the top block in the sliding direction is smaller than the distance between the axially adjacent fixed columns on the speed adjusting rod.

Compared with the prior art, the invention has the advantages that: the invention realizes speed change by utilizing the matching of the speed regulating rod and the transposition gear rod, does not need a clutch, reduces the whole structure of the gearbox, has smoother speed change, firmer and more reliable connection of the speed change gear and the speed change gear shaft, does not generate slipping, reduces the manufacturing cost, is convenient to operate, has accurate and reliable speed change and has good practicability.

Drawings

Fig. 1 is a schematic structural diagram 1 of a transmission according to the present invention.

Fig. 2 is a schematic structural diagram 2 of a transmission according to the present invention.

Fig. 3 is a schematic structural diagram 3 of a transmission according to the present invention.

Fig. 4 is a sectional view taken at a-a of fig. 2.

Fig. 5 is a sectional view at B-B of fig. 3.

Fig. 6 is an enlarged view at C of fig. 4.

Fig. 7 is a schematic view of the construction of the inventive governor lever.

FIG. 8 is a schematic structural diagram of the shift lever and the top block of the present invention.

Fig. 9 is a cross-sectional view of one of the speed change gears, the speed change gear shaft, and the speed lever in the speed change gear set of the present invention.

Fig. 10 is a partially enlarged view of the governor lever of the present invention.

As shown in the figure: 1. the device comprises a fixed frame, 2, an input shaft, 3, a driving gear set, 4, a speed change gear set, 5, a speed change gear shaft, 6, a fixed hole, 7, a speed adjusting rod, 8, a transposition gear rod, 9, a top block, 10, a fixed column, 11, a spring, 12, a hydraulic telescopic rod, 13, an output gear, 14, a first driven gear, 15, a second driven gear, 16 and a limiting sliding groove.

Detailed Description

A gearbox according to the present invention will now be described in further detail with reference to the accompanying drawings.

With reference to fig. 1-10, a transmission comprises a fixed frame 1, an input shaft 2 rotatably connected with the fixed frame 1, a driving gear set 3 fixedly connected to the input shaft 2, and a speed change gear set 4 matched with the driving gear set 3, wherein each speed change gear of the speed change gear set 4 is coaxial, and each driving gear of the driving gear set 3 is always engaged with each corresponding speed change gear of the speed change gear set 4; the gearbox comprises speed change gear shafts 5, the number of the speed change gear shafts 5 is the same as that of speed change gears of the speed change gear sets 4, each speed change gear of the speed change gear sets 4 is independently and rotatably connected with the fixed frame 1 through each speed change gear shaft 5, each speed change gear of the speed change gear sets 4 is fixedly connected with each speed change gear shaft 5, the speed change gear shafts 5 are of a pipe structure, and fixing holes 6 are distributed in the middle of the speed change gear shafts 5 along the circumferential array; the gearbox comprises a speed adjusting rod 7 and a transposition gear lever 8, wherein the speed adjusting rod 7 penetrates through the inside of the speed changing gear shaft 5, a limiting sliding groove 16 is formed in the middle of the speed adjusting rod 7 along the axis of the speed adjusting rod, one end of the transposition gear lever 8 is fixedly connected with an ejector block 9 matched with the limiting sliding groove 16, the transposition gear lever 8 drives the ejector block 9 to slide relative to the limiting sliding groove 16, fixing columns 10 matched with the fixing holes 6 are connected to the speed adjusting rod 7 in a sliding mode, the ends, close to the axis of the speed adjusting rod 7, of the fixing columns 10 extend into the limiting sliding groove 16 in a natural state, the other ends of the fixing columns 10 retract into the speed adjusting rod 7, and when the ejector blocks 9 pass through the fixing columns 10, one parts of the fixing columns 10 extend out of the speed adjusting rod 7 and are.

The spring 11 is sleeved on the outer side of the fixed column 10, one end of the spring 11 is fixedly connected with the fixed column 10, and the other end of the spring 11 is fixedly connected with the speed regulating rod 7, so that the fixed column 10 is ensured to be always retracted into the speed regulating rod 7 in an initial state.

Each driving gear of driving gear group 3 links firmly in same input shaft 2, when input shaft 2 rotated, drives each driving gear of driving gear group 3 rotates simultaneously, makes each change gear of change gear group 4 rotate simultaneously.

The end, far away from the top block 9, of the transposition stop lever 8 is provided with a hydraulic telescopic rod 12, the extending direction of the hydraulic telescopic rod 12 is the same as the extending direction of the transposition stop lever 8, the rod body of the hydraulic telescopic rod 12 is rotatably connected with the transposition stop lever 8, and the rod body of the hydraulic telescopic rod 12 is fixed with the outside.

The speed adjusting rod 7 is connected with the fixed frame 1 in a rotating mode, the output gear 13 is fixedly connected to the speed adjusting rod 7, the fixed frame 1 is connected with a first driven gear 14 meshed with the output gear 13 in a rotating mode, the first driven gear and a second driven gear 15 coaxially rotating with the first driven gear 14 are connected in a rotating mode, and the second driven gear 15 is used for outputting torque.

The limiting sliding groove 16 is a cross sliding groove, the top block 9 is a cross top block, the end, close to the fixing hole 6, of the fixing column 10 is chamfered, and the two ends of the top block 9 in the sliding direction are chamfered.

The number of the driving gears of the driving gear set 3 and the number of the speed change gears of the speed change gear set 4 are set according to the actual required speed change gear number, and the number of the driving gears of the driving gear set 3 and the number of the speed change gears of the speed change gear set 4 are both 18 according to the gear requirement of the truck.

The length of the top block 9 in the sliding direction is less than the distance between the axially adjacent fixed columns 10 on the speed adjusting rod 7

In the specific implementation of the invention, torque is input from an input shaft 2, the input shaft 2 drives each gear of a driving gear set 3 to rotate simultaneously, each speed change gear of a speed change gear set 4 rotates simultaneously, a transposition gear lever 8 is driven by a hydraulic telescopic rod 12 to slide relative to a speed change lever 7 in a limiting sliding chute 16, a top block 9 slides relative to the speed change lever 7 in the limiting sliding chute 16, when the top block 9 slides to the position of a certain pair of meshed gears of the driving gear set 3 and the speed change gear set 4, a part of a fixed column 10 is ejected out of the speed change lever 7 by the top block 9, the fixed column 10 is matched with a fixed hole 6, the speed change lever 7 rotates, the transmission ratio of the input shaft 2 and the speed change lever 7 is the transmission ratio of a driving gear and a speed change gear corresponding to the matching of the fixed column 10 and the fixed hole 6 at this moment, the speed change lever 7 drives an output gear 13 to rotate, the output gear 13 drives a first, the second driven gear 15 rotates coaxially with the first driven gear 14, so that the torque is output, the positions of the jacking blocks 9 in the limiting sliding grooves 16 relative to the speed adjusting rod 7 are changed, fixing columns 10 at different positions extend out of the speed adjusting rod 7 to be matched with corresponding fixing holes 6, the input shaft 2 and the speed adjusting rod 7 can realize different transmission ratios, the number of the driving gears of the driving gear set 3 and the number of the speed changing gears of the speed changing gear set 4 are set according to the actual required speed changing gear number, according to the gear requirement of the truck, the number of the driving gears of the driving gear set 3 and the number of the speed change gears of the speed change gear set 4 are both 18, at the moment, 18-stage speed change can be realized, before the top block 9 changes the position to enable the lower pair of fixing columns 10 to be matched with the fixing holes 6, the fixing columns 10 which are matched in the front are retracted into the speed regulating rod 7 under the action of the elastic force of the springs 11, and therefore smooth and stable speed changing process is guaranteed.

The invention realizes speed change by utilizing the matching of the speed regulating rod and the transposition gear rod, does not need a clutch, reduces the whole structure of the gearbox, has smoother speed change, firmer and more reliable connection of the speed change gear and the speed change gear shaft, does not generate slipping, reduces the manufacturing cost, is convenient to operate, has accurate and reliable speed change and has good practicability.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.