Structure for realizing gear shifting of gear box by driving idle gear on shaft to slip through shaft core slip

Abstract

The utility model relates to a structure that a shaft core slides to drive an idle gear on a shaft to slide to achieve gear shifting of a gear box, and a traditional shifting fork gear shifting structure is replaced, so that the position of a shifting fork does not need to be reserved in the speed change gear box, the structure is more compact, transmission efficiency is high, and operation is reliable. An external oil cylinder is not needed, so that a vacancy can be vacated, and the weight is reduced; in addition, the vacancy can be used for adding special parts or special design and the like, so that the practicability of the speed change gear box is improved, and wider application requirements can be met; due to the fact that no shifting fork exists, the problem that the shifting fork is abraded in the long-time friction process of the shifting fork and the gear ring groove is solved, and the reliability of the speed change gear box in the operation process is improved. In addition, vibration and friction caused by slippage of splines of a traditional speed change gear are overcome, and noise and vibration are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to variable speed gear box technical field, especially a kind of structure of idle gear sliding on axle core sliding driving axle to realize gear box gear shifting. BACKGROUND

[0002] Variable speed gear box is a kind of mechanical device, mainly through the meshing of gear to realize different functions. Its main functions include acceleration and deceleration, change transmission direction, change rotating torque, clutch function and power distribution, etc.

[0003] However, the gear shifting structure of traditional variable speed gear box is through shift fork gear shifting, shift fork is with gear shifting gear up and down movement meshing different gears, to switch different gears, to realize the speed change of variable speed gearbox. Then, the existing shift fork gear shifting structure has the following deficiencies: 1, variable speed gearbox needs to reserve the position of installing shift fork inside, and shift fork gear shifting needs external oil cylinder, so that the volume of variable speed gear box is large; 2, shift fork is easy to wear in long time friction with gear ring groove, which may cause gear not to be accurately engaged or drop gear, and shift fork may be broken in serious case; 3, variable speed gear is connected with axle core through spline, when variable speed gear slides in spline groove, the friction contact surface is large, and the wear is faster, and the iron powder of wear and tear will also pollute bearing. SUMMARY

[0004] The utility model aims at at least one of the problems existing in prior art, and to solve the problem, the utility model provides a kind of structure of idle gear sliding on axle core sliding driving axle to realize gear box gear shifting.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The structure of idle gear sliding on axle core sliding driving axle to realize gear box gear shifting includes box, input shaft, output shaft and sliding shaft are respectively arranged in the box, input double gear is arranged on the input shaft, output double gear is arranged on the output shaft, upper cylinder body with lower end opening is arranged on the upper end of the box, upper medium interface is arranged on the upper cylinder body, lower cylinder body with upper end opening is arranged in the box, lower medium interface is arranged on the lower cylinder body, the both ends of the sliding shaft are respectively up and down movable in the upper cylinder body and lower cylinder body, and variable speed gear set is rotatably arranged on the sliding shaft.

[0007] In some embodiments, the input double gear includes first input gear and second input gear arranged at intervals, and the output double gear includes first output gear and second output gear arranged at intervals.

[0008] In some embodiments, a bearing is sleeved on the sliding shaft, the gear set comprises a gear sleeve sleeved on the bearing, and a first gear, a second gear and a third gear are sequentially arranged on the gear sleeve from top to bottom.

[0009] In some embodiments, a cylinder locking frame is arranged on the upper end of the box body, a cylinder is mounted on the cylinder locking frame, a through hole is arranged on one side of the upper cylinder body, a limiting notch is arranged on one side of the upper end of the sliding shaft, a piston rod of the cylinder passes through the through hole and extends into the limiting notch, and the limiting notch comprises a vertical limiting groove and a turning locking groove arranged at the upper and lower ends of the vertical limiting groove.

[0010] In some embodiments, a sealing ring is arranged on the upper and lower ends of the sliding shaft.

[0011] In some embodiments, an observation glass window is arranged on one side of the box body.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model replaces the traditional shift fork shifting structure, so that the shift gear box does not need to reserve the position of the shift fork, and the structure is more compact, the transmission efficiency is high, and the operation is reliable.

[0014] 2. The utility model also does not need an external oil cylinder, so that a space is left, the weight is reduced, and the space can be used to increase special parts or special design, improve the practicability of the shift gear box, and meet more extensive application requirements.

[0015] 3. Since the shift fork is not used, the problem of wear of the shift fork in long-time friction with the gear ring groove is avoided, and the reliability of the shift gear box during operation is improved.

[0016] 4. In addition, the vibration and friction caused by the traditional shift gear spline sliding are overcome, and the generation of noise and vibration is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic view of the utility model;

[0018] Figure 2 It is a top view schematic view of the utility model;

[0019] Figure 3 It is a three-dimensional schematic view of the utility model Figure 2A-A section view schematic diagram of the utility model;

[0020] Figure 4 The utility model discloses Figure 2 B-B section view schematic diagram of the utility model;

[0021] Figure 5 The utility model discloses Figure 4 A enlarged schematic diagram of the utility model;

[0022] Figure 6 The schematic diagram of the utility model in the first kind of gear shift state;

[0023] Figure 7 The schematic diagram of the utility model in the second kind of gear shift state. DETAILED DESCRIPTION

[0024] The following detailed implementation provides a plurality of different embodiments or examples for implementing the utility model. Of course, these are only examples and are not intended to be limiting. In addition, repeated reference numbers and / or letters can be used in different embodiments. These repetitions are for the purpose of simply and clearly describing the utility model, and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0025] As Figures 1-7 The structure of the shaft core sliding driving the idling gear on the shaft to realize gear box gear shifting, including the box body 1, the input shaft 2, the output shaft 3 and the sliding shaft 8 are arranged in the box body 1 respectively, the input double gear 4 is arranged on the input shaft 2, the output double gear 5 is arranged on the output shaft 3, the upper cylinder body 6 with the lower end opening is arranged on the upper end of the box body 1, the upper medium interface 9 is arranged on the upper cylinder body 6, the lower cylinder body 7 with the upper end opening is arranged in the box body 1, the lower medium interface 10 is arranged on the lower cylinder body 7, the both ends of the sliding shaft 8 are respectively up and down movable in the upper cylinder body 6 and the lower cylinder body 7, the variable speed gear set 11 is rotatably sleeved on the sliding shaft 8.

[0026] The utility model discloses gear box gear shifting, through the upper medium interface 9 admission or liquid, the lower medium interface 10 exhaust or liquid, so that the sliding shaft 8 drives the variable speed gear set 11 to move down, realizes the variable speed, by analogy, through the upper medium interface 9 exhaust or liquid, the lower medium interface 10 admission or liquid, so that the sliding shaft 8 drives the variable speed gear set 11 to move up, realizes the variable speed.

[0027] It needs to be explained that the upper medium interface 9 and the lower medium interface 10 can be connected to gas or liquid, that is, pneumatic transmission or hydraulic oil transmission can be used.

[0028] According to the above structure, the traditional shift fork shifting structure is abandoned, so that the shift gear box does not need to reserve the position of the shift fork, so that the structure is more compact, the transmission efficiency is high, and the operation is reliable.

[0029] No external oil cylinder is also needed, so that a space is emptied, the weight is reduced, and the practicability of the shift gear box is improved.

[0030] And since there is no shift fork, the problem of wear of the shift fork in long-time friction with the gear ring groove is avoided, thereby improving the reliability of the shift gear box during operation.

[0031] In addition, the vibration and friction caused by the traditional shift gear spline sliding are also overcome, and the generation of noise and vibration is effectively reduced.

[0032] Referring to Figure 3 、 Figure 6 、 Figure 7 , the input double gear 4 includes a first input gear 21 and a second input gear 22 arranged in an upper and lower interval, and the output double gear 5 includes a first output gear 23 and a second output gear 24 arranged in an upper and lower interval.

[0033] Further, a bearing 31 is sleeved on the sliding shaft 8, and the shift gear set 11 includes a gear sleeve 32 sleeved on the bearing 31, and a first shift gear 33, a second shift gear 34 and a third shift gear 35 are arranged in sequence from top to bottom on the gear sleeve 32.

[0034] The shift gear box has two shift states, the first shift state is 1:1 transmission, and the second shift state is 1:4 transmission.

[0035] Of course, the above two transmission ratios are only the preferred embodiments of the present embodiment, but the present application is not limited to the above embodiments, as long as any same or similar means achieves the technical effect of the present application, it should fall within the protection scope of the present application.

[0036] In the first shift state, the sliding shaft 8 is located at the upper position, at this time, the first input gear 21, the first shift gear 33 and the first output gear 23 can be engaged in sequence.

[0037] In the second shift state, the sliding shaft 8 is located at the lower position, at this time, the second input gear 22 and the second shift gear 34 are engaged, and the third shift gear 35 and the second output gear 24 are engaged.

[0038] Referring to Figure 1 、 Figure 4 、 Figure 5As shown in the box 1 upper end is provided with a cylinder locking frame 41, on the cylinder locking frame 41 is installed on the cylinder 42, on the upper cylinder body 6 one side is provided with a through hole 43, on the sliding shaft 8 upper end one side is provided with a limiting notch 44, the cylinder 42 piston rod 45 through the through hole 43 and into the limiting notch 44, the limiting notch 44 includes a vertical limiting groove 46 and set in the vertical limiting groove 46 upper and lower two ends of the steering locking groove 47.

[0039] When the need to shift, the cylinder 42 piston rod 45 retracted, and out of the steering locking groove 47, at this time, at this time, the sliding shaft 8 can be moved up or down to shift work, while the sliding shaft 8 in the upper and lower movement, the piston rod 45 in the vertical limiting groove 46, for guiding the sliding shaft 8 up and down, when the sliding shaft 8 moves shift complete, the cylinder 42 piston rod 45 extended, and inserted into the corresponding steering locking groove 47, thereby locking the sliding shaft 8; thus the gear transmission, the axial movement and axial rotation of the sliding shaft 8 can be locked, thereby improving the stability of the gear transmission, let the transmission gear box operation more reliable.

[0040] Referring to Figure 4 As shown in the sliding shaft 8 upper and lower ends are provided with a sealing ring 51, so that the sliding shaft 8 both ends in the upper cylinder body 6 and the lower cylinder body 7 moves, to avoid the situation of air leakage, in addition, through the sealing ring 51, the vibration generated by the sliding shaft 8 can also be eliminated, improve the stability of the transmission gear set 11 in the sliding shaft 8 rotation.

[0041] In order to facilitate the observation of gear shift success, in the box 1 one side is provided with an observation glass window 61.

[0042] The basic principle and main features of the present application and the advantages of the present application are shown and described above in conjunction with the drawings, those skilled in the art should understand that the present application is not limited by the above examples, the above examples and the description in the specification is only to illustrate the principle of the present application, without departing from the spirit and scope of the present application, the present application will have various changes and improvements, these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A structure for shifting gearboxes by sliding a shaft core to drive a rotating gear on the shaft, comprising a housing (1), wherein an input shaft (2), an output shaft (3), and a sliding shaft (8) are respectively arranged in the housing (1), an input double gear (4) is arranged on the input shaft (2), and an output double gear (5) is arranged on the output shaft (3), characterized in that: An upper cylinder (6) with an open lower end is arranged at the upper end of the box (1), and an upper medium interface (9) is arranged on the upper cylinder (6); a lower cylinder (7) with an open upper end is arranged in the box (1), and a lower medium interface (10) is arranged on the lower cylinder (7); the two ends of the sliding shaft (8) are movably arranged in the upper cylinder (6) and the lower cylinder (7) in an up-down manner; and a variable gear set (11) is rotatably arranged on the sliding shaft (8).

2. The structure of the shaft core slip driving idling gear slip to realize the gear box shifting according to claim 1, characterized in that: The input double gear (4) comprises a first input gear (21) and a second input gear (22) arranged in an up-down manner; and the output double gear (5) comprises a first output gear (23) and a second output gear (24) arranged in an up-down manner.

3. The structure of the shaft core slip driving idling gear slip to realize the gear box shifting according to claim 2, characterized in that: A bearing (31) is arranged on the sliding shaft (8); the variable gear set (11) comprises a gear sleeve (32) arranged on the bearing (31); a first variable gear (33), a second variable gear (34) and a third variable gear (35) are arranged on the gear sleeve (32) in a top-to-bottom manner; the variable gear box has two variable states; in the first variable state, the first input gear (21), the first variable gear (33) and the first output gear (23) can be engaged in sequence; in the second variable state, the second input gear (22) and the second variable gear (34) are engaged, and the third variable gear (35) and the second output gear (24) are engaged.

4. The structure of the shaft core slip driving idling gear slip to realize the gear box shifting according to claim 3, characterized in that: A cylinder locking frame (41) is arranged at the upper end of the box (1); a cylinder (42) is arranged on the cylinder locking frame (41); a through hole (43) is arranged on one side of the upper cylinder (6); a limiting slot (44) is arranged on one side of the upper end of the sliding shaft (8); a piston rod (45) of the cylinder (42) passes through the through hole (43) and extends into the limiting slot (44); the limiting slot (44) comprises a vertical limiting groove (46) and a turning locking groove (47) arranged at the upper and lower ends of the vertical limiting groove (46).

5. The structure of the shaft core slip driving idling gear slip to realize the gear box shifting according to claim 1, characterized in that: Sealing rings (51) are arranged at the upper and lower ends of the sliding shaft (8).

6. The structure of the shaft core slip driving idling gear slip to realize the gear box shifting according to claim 1, characterized in that: An observation glass window (61) is arranged on one side of the box (1).

Images