ATV gear shifting structure

Abstract

The utility model belongs to the technical field of automobile gear shifting, and particularly relates to an ATV gear shifting structure. An ATV gear shifting structure comprises an output shaft and a shell, and the output shaft is connected with a planetary gear train; the fork entry is shifted through the shifting finger, the fork entry drives the shifting fork, the shifting fork pushes the gear sleeve, the gear sleeve can slide in the axial direction of the sun wheel through the second involute spline, meanwhile, gear shifting can be achieved through meshing of the second cylindrical teeth and the first cylindrical teeth, or gear shifting is achieved through meshing of the third cylindrical teeth and the fourth cylindrical teeth.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile gear shifting, specifically, the utility model relates to an ATV gear shifting structure. BACKGROUND

[0002] With the increasingly prosperous ATV industry, its application scenarios are relatively wide, such as outdoor leisure and entertainment, agricultural operation, industrial application, off-road driving and outdoor exploration, and the like. As can be seen, the used scenarios are relatively complex and harsh. In the use process, the ATV may be trapped in a sandpit or other situations, and it may be unable to escape due to insufficient power. At this time, the ATV gear shifting is applied. When the ATV encounters the above situations, the gear shifting operation can be performed to make the transmission run at a higher speed, that is, the ATV obtains greater power to achieve the purpose of escaping.

[0003] The automatic transmission of the ATV usually adopts a planetary gear system, and different gears are realized through different clutch combinations. Such a transmission can automatically select the appropriate gear according to the vehicle speed and engine load without manual operation by the driver, providing convenience and comfort.

[0004] Chinese patent (publication number: 111473105A) discloses that a driving gear rotates with the movement of a gear lever unit; and a driven gear is engaged with the external teeth of the driving gear, and the driven gear is connected with a gear shifting cable to push or pull the gear shifting cable through the rotation of the driving gear to realize the change of gears. SUMMARY

[0005] The utility model is carried out in order to solve the above problem, the purpose is to provide a kind of gear shifting structure, in the automobile is trapped in sandpit or other situations, gear shifting is changed by gear shifting structure, it can obtain greater power to achieve the purpose of escaping. In order to realize the above purpose, the technical scheme that the utility model adopts is as follows:

[0006] The utility model provides an ATV gear shifting structure, including shell and the output shaft that is connected with shell, the output shaft connects planetary gear train.

[0007] The planetary gear train includes a planet carrier and a sun gear, the sun gear is installed on the planet carrier, the planet carrier is provided with a gear sleeve on one side, the gear sleeve is connected with a yoke assembly, the gear sleeve is sleeved on the sun gear, the gear sleeve is provided with a gear shifting gear on one side, and the gear shifting gear is sleeved on the output shaft.

[0008] The yoke assembly includes a yoke, a fork and a fork shaft, the fork shaft is arranged in the shell, one end of the fork shaft is provided with the yoke, the yoke is connected with the gear sleeve, and the fork is connected with a gear shifting shaft assembly.

[0009] The shift shaft assembly comprises a shift shaft arranged in a housing, the shift shaft is sleeved with a first positioning block and a second positioning block, a shift finger is arranged between the first positioning block and the second positioning block, the shift finger is sleeved on the shift shaft, a first torsional spring is arranged between the first positioning block and the shift finger, and a second torsional spring is arranged between the second positioning block and the shift finger.

[0010] The fork shaft is provided with a positioning assembly on one side, the positioning assembly comprises a positioning shell arranged in a housing, a first slot is formed in one end of the positioning shell, a positioning spring is arranged in the first slot, the positioning spring is connected with a positioning steel ball, the fork shaft is provided with a tooth groove, and the positioning steel ball abuts against the tooth groove.

[0011] A needle bearing is arranged between the output shaft and the sun gear, the needle bearing is connected with a spacer sleeve, the spacer sleeve is located between the output shaft and the sun gear, and the first positioning block and the second positioning block are connected on the shift shaft through elastic pins.

[0012] The planetary carrier is connected with a first cylindrical tooth, the first cylindrical tooth is formed with a first chamfer, and the sun gear is formed with a first involute spline.

[0013] The inner hole of the tooth sleeve is designed with a second involute spline, the tooth sleeve is provided with a second cylindrical tooth and a third cylindrical tooth at two ends respectively, and the second involute spline is matched with the first involute spline.

[0014] The shift gear is connected with a first connecting block, the first connecting block is formed with a first through hole, the first through hole is connected with the housing through bolts, one side of the shift gear is connected with a fourth cylindrical tooth, and the fourth cylindrical tooth is formed with a second chamfer.

[0015] The first cylindrical tooth is circumferentially distributed in the planetary carrier, the second cylindrical tooth and the third cylindrical tooth are circumferentially distributed on the tooth sleeve, and the fourth cylindrical tooth is circumferentially distributed on the shift gear.

[0016] The technical effect of the utility model is that: the shift shaft drives the shift finger, the shift finger drives the fork, the fork drives the tooth sleeve, the tooth sleeve can slide on the sun gear through the second involute spline, the tooth sleeve can slide on the sun gear through the second involute spline, the second cylindrical tooth can be engaged with the first cylindrical tooth, gear shifting is realized, or the third cylindrical tooth and the fourth cylindrical tooth are engaged, gear shifting is realized. The first positioning block and the second positioning block are used for abutting against the first torsional spring and the second torsional spring, the positioning and rebound functions during gear shifting ensure the accuracy of gear shifting. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present specification includes the following drawings, and the shown contents are as follows:

[0018] Figure 1Is the schematic diagram of the shifting structure of the utility model ATV;

[0019] Figure 2 Is the schematic diagram of the planetary gear train structure of the utility model;

[0020] Figure 3 Is the schematic diagram of the fork assembly section of the utility model;

[0021] Figure 4 Is the schematic diagram of the positioning assembly structure of the utility model;

[0022] Figure 5 Is the schematic diagram of the shifting shaft assembly of the utility model;

[0023] Figure 6 Is the schematic diagram of the planet carrier structure of the utility model;

[0024] Figure 7 Is the schematic diagram of the sun gear of the utility model;

[0025] Figure 8 Is the schematic diagram of the gear sleeve structure of the utility model;

[0026] Figure 9 Is the schematic diagram of the fork shaft structure of the utility model;

[0027] Figure 10 Is the schematic diagram of the shifting gear structure of the utility model.

[0028] In the figure, marked: 1, output shaft;2, planetary gear train;21, planet carrier;211, first cylindrical tooth;212, first chamfer;22, sun gear;221, first involute spline;3, needle bearing;4, spacer;5, gear sleeve;51, second involute spline;52, second cylindrical tooth;53, third cylindrical tooth;6, shifting gear;61, fourth cylindrical tooth;62, second chamfer;63, first through hole;64, first connecting block;7, bolt;8, fork assembly;81, fork;82, fork mouth;83, fork shaft;831, tooth groove;9, positioning seat assembly;91, positioning shell;92, positioning spring;93, positioning steel ball;94, first groove;10, shifting shaft assembly;101, shifting shaft;102, positioning block;103, first torsional spring;104, elastic pin;105, finger;106, second positioning block;107, second torsional spring;11, housing. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application are further described in detail below with reference to the drawings, and the purpose is to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help its implementation.

[0030] AsFigures 1-10 As shown, an ATV shift structure includes a housing 11 and an output shaft 1 connected to the housing 11, the output shaft 1 is connected to a planetary gear train 2. The output shaft 1 drives the planetary gear train 2 to rotate, providing a power source for the planetary gear train 2. The housing 11 protects the internal parts of the housing 11.

[0031] The planetary gear train 2 includes a carrier 21 and a sun gear 22, the sun gear 22 is installed on the carrier 21, one side of the carrier 21 is provided with a sleeve 5, the sleeve 5 is connected with a shift fork assembly 8, the sleeve 5 is sleeved on the sun gear 22, one side of the sleeve 5 is provided with a shift gear 6, the shift gear 6 is sleeved on the output shaft 1. The carrier 21 and the sun gear 22 are responsible for transmitting and adjusting the output of power. The planetary gear train 2 can achieve different transmission ratios by changing the relative motion of the gears, so as to achieve the effect of shifting. The shift gear 6 is sleeved on the output shaft 1, and different transmission paths are selected by moving the sleeve 5 to achieve different output speeds and torques.

[0032] The shift fork assembly 8 includes a shift fork 81, a fork mouth 82 and a fork shaft 83, the fork shaft 83 is arranged in the housing 11, one end of the fork shaft 83 is provided with the shift fork 81, the shift fork 81 is connected with the sleeve 5, and the fork mouth 82 is connected with a shift shaft assembly 10. The sleeve 5 is installed on the sun gear 22 and can move axially to select different gear combinations. The shift fork assembly 8 is connected with the sleeve 5 through the shift fork 81, and the shift fork 81 pushes the sleeve 5 to realize shifting.

[0033] The shift shaft assembly 10 includes a shift shaft 101, the shift shaft 101 is arranged in the housing 11, the shift shaft 101 is sleeved with a first positioning block 102 and a second positioning block 106, a shift finger 105 is arranged between the first positioning block 102 and the second positioning block 106, the shift finger 105 is sleeved on the shift shaft 101, a first torsional spring 103 is arranged between the first positioning block 102 and the shift finger 105, and a second torsional spring 107 is arranged between the second positioning block 106 and the shift finger 105. The shift shaft 101 drives the shift finger 105, the fork mouth 82 is driven by the shift finger 105, the shift fork 81 is driven by the fork mouth 82 to push the sleeve 5, so that shifting can be realized. The first positioning block 102 and the second positioning block 106 are used to resist the first torsional spring 103 and the second torsional spring 107, and the positioning and rebound functions during shifting ensure the accuracy of shifting action.

[0034] A positioning component 9 is provided on one side of the fork shaft 83. The positioning component 9 includes a positioning housing 91, which is disposed within the housing 11. A first groove 94 is formed at one end of the positioning housing 91, and a positioning spring 92 is disposed within the first groove 94. The positioning spring 92 is connected to a positioning steel ball 93. The fork shaft 83 is provided with toothed grooves 831, with three grooves 831 respectively used for N, H, and L gears. The positioning steel ball 93 abuts against the toothed grooves 831. The first groove 94 is used to install the positioning spring 92, which provides a pushing force to the positioning steel ball 93, enabling the positioning steel ball to abut against the toothed grooves 831.

[0035] Two needle roller bearings 3 are provided between the output shaft 1 and the sun gear 22, and a spacer 4 is connected between them. The spacer 4 is located between the output shaft 1 and the sun gear 22. The spacer 4 is mounted on the output shaft 1 to separate the two needle roller bearings 3. The needle roller bearings 3 are used to reduce the friction between the output shaft 1 and the sun gear 22 and extend their service life. The first positioning block 102 and the second positioning block 106 are connected to the shift shaft 101 by a spring pin 104. The spring pin 104 fixes the first positioning block 102 and the second positioning block 106 to the shift shaft 101.

[0036] The planetary carrier 21 is internally connected to a first cylindrical tooth 211, which has a first chamfer 212. The sun gear 22 has a first involute spline 221. The first cylindrical tooth 211 engages with the second cylindrical tooth 52 to achieve gear shifting, and the chamfer 212 makes the engagement smoother. The first involute spline 221 engages with the second involute spline 51 to achieve power transmission.

[0037] The inner bore of the gear sleeve 5 is designed with a second involute spline 51, and the two ends of the gear sleeve 5 are respectively provided with a second cylindrical tooth 52 and a third cylindrical tooth 53. The second involute spline 51 mates with the first involute spline 221. The gear sleeve 5 can slide axially on the sun gear 22 via the second involute spline 51, and can also engage with the first cylindrical tooth 211 via the second cylindrical tooth 52 to achieve gear shifting, or engage with the fourth cylindrical tooth 61 via the third cylindrical tooth 53 to achieve gear shifting.

[0038] The shift gear 6 is connected to a first connecting block 64, which has a first through hole 63. The first through hole 63 is connected to the housing 11 by a bolt 7. A fourth columnar tooth 61 is connected to one side of the shift gear 6, and the fourth columnar tooth 61 has a second chamfer 62. The first through hole 63 is connected to the housing 11 by a bolt 7. The third columnar tooth 53 meshes with the fourth columnar tooth 61 to achieve gear shifting. The second chamfer 62 makes the meshing of the third columnar tooth 53 and the fourth columnar tooth 61 smoother.

[0039] The first column teeth 211 are distributed in the planetary carrier 21 in a circle, the second column teeth 52 and the third column teeth 53 are distributed on the gear sleeve 5 in a circle, the second column teeth 52 can be engaged with the first column teeth 211 more firmly, and the fourth column teeth 61 are distributed on the shift gear 6 in a circle. When the third column teeth 53 are engaged with the fourth column teeth 61, the engagement can be more firm.

[0040] Effects of the embodiment

[0041] The shift shaft 101 drives the finger 105, the fork 82 is driven by the finger 105, the fork 82 drives the shift fork 81, the shift fork 81 pushes the gear sleeve 5, the gear sleeve 5 can slide on the sun gear 22 in the axial direction through the second involute spline 51, and the second column teeth 52 can be engaged with the first column teeth 211, so that gear shifting is realized, or the third column teeth 53 are engaged with the fourth column teeth 61, so that gear shifting is realized. The fork shaft 83 is provided with tooth grooves 831, the tooth grooves 831 are provided with three tooth grooves 831, which are respectively used for N gear, H gear and L gear, the positioning steel ball 93 is in abutment with the tooth grooves 831. The tooth grooves 831 are used for limiting N gear, H gear and L gear. The first positioning block 102 and the second positioning block 106 are used for abutting against the first torsional spring 103 and the second torsional spring 107, and the first positioning block 102 and the second positioning block 106 are used for abutting against the first torsional spring 103 and the second torsional spring 107. The positioning and rebound functions during gear shifting ensure that the gear shifting action is accurate. The utility model has been described above in combination with the drawings. Apparently, the specific implementation of the utility model is not limited by the above mode. As long as various non-essential improvements are made by adopting the method concept and the technical scheme of the utility model, or the above-mentioned concept and the technical scheme of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An ATV shift structure comprising a housing (11) and an output shaft (1) connected with the housing (11), characterized in that: The output shaft (1) is connected with a planetary gear train (2); the planetary gear train (2) comprises a planet carrier (21) and a sun gear (22), the sun gear (22) is installed on the planet carrier (21), one side of the planet carrier (21) is provided with a gear sleeve (5), the gear sleeve (5) is connected with a fork assembly (8), the gear sleeve (5) is sleeved on the sun gear (22), one side of the gear sleeve (5) is provided with a shift gear (6), the shift gear (6) is sleeved on the output shaft (1); the fork assembly (8) comprises a fork (81), a fork mouth (82) and a fork shaft (83), the fork shaft (83) is arranged in a housing (11), one end of the fork shaft (83) is provided with the fork (81), the fork (81) is connected with the gear sleeve (5), the fork mouth (82) is connected with a shift shaft assembly (10).

2. An ATV shift structure according to claim 1, characterized in that: The shift shaft assembly (10) comprises a shift shaft (101), the shift shaft (101) is arranged in the housing, the shift shaft (101) is sleeved with a first positioning block (102) and a second positioning block (106), a shift finger (105) is arranged between the first positioning block (102) and the second positioning block (106), the shift finger (105) is sleeved on the shift shaft (101), a first torsional spring (103) is arranged between the first positioning block (102) and the shift finger (105), a second torsional spring (107) is arranged between the second positioning block (106) and the shift finger (105).

3. An ATV shift structure according to claim 2, characterized in that: One side of the fork shaft (83) is provided with a positioning assembly (9), the positioning assembly (9) comprises a positioning shell (91), the positioning shell (91) is arranged in the housing (11), one end of the positioning shell (91) is provided with a first slot (94), the first slot (94) is provided with a positioning spring (92), the positioning spring (92) is connected with a positioning steel ball (93), the fork shaft (83) is provided with a gear slot (831), the positioning steel ball (93) abuts against the gear slot (831).

4. An ATV shift structure according to claim 3, characterized in that: A needle roller bearing (3) is arranged between the output shaft (1) and the sun gear (22), the needle roller bearing (3) is connected with a spacer sleeve (4), the spacer sleeve (4) is located between the output shaft (1) and the sun gear (22), the first positioning block (102) and the second positioning block (106) are connected on the shift shaft (101) through an elastic pin (104).

5. An ATV shift structure according to claim 4, characterized in that: A first cylindrical tooth (211) is connected in the planet carrier (21), the first cylindrical tooth (211) is provided with a first chamfer (212), the sun gear (22) is provided with a first involute spline (221).

6. An ATV shift structure according to claim 5, characterized in that: A second involute spline (51) is designed in the inner hole of the gear sleeve (5), the gear sleeve (5) is respectively provided with a second cylindrical tooth (52) and a third cylindrical tooth (53) at two ends, and the second involute spline (51) is matched with the first involute spline (221).

7. An ATV shift structure according to claim 6, characterized in that: The shift gear (6) is connected with a first connecting block (64), the first connecting block (64) is opened with a first through hole (63), the first through hole (63) is connected with the shell (11) through a bolt (7), one side of the shift gear (6) is connected with a fourth cylindrical tooth (61), the fourth cylindrical tooth (61) is opened with a second chamfer (62).

8. An ATV shift structure according to claim 7, characterized in that: The first cylindrical tooth (211) is circumferentially distributed in the planet carrier (21), the second cylindrical tooth (52) and the third cylindrical tooth (53) are circumferentially distributed on the gear sleeve (5), and the fourth cylindrical tooth (61) is circumferentially distributed on the shift gear (6).

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