Novel gear shifting shaft assembly

Abstract

The utility model provides a novel gear shifting shaft assembly, and belongs to the technical field of machinery. The novel gear shifting shaft assembly solves the problems that an existing novel gear shifting shaft assembly is not smooth enough in gear shifting and large in gear shifting noise. The novel gear shifting shaft assembly comprises a transmission shaft, the transmission shaft is fixedly connected with a driving gear, the transmission shaft is sequentially sleeved with a high-speed-gear gear, a speed changing ring and a low-speed-gear gear, the speed changing ring is fixedly connected with the transmission shaft in the circumferential direction, and first external splines are arranged on the outer side walls of the ends, close to the speed changing ring, of the high-speed-gear gear and the low-speed-gear gear. The outer side wall of the speed change ring is provided with a second outer spline, the outer side of the speed change ring is sleeved with a spline sleeve, the inner side wall of the spline sleeve is provided with an inner spline meshed with the second outer spline, the spline sleeve can axially move, the inner spline of the spline sleeve can be meshed with the first outer splines of the high-speed gear and the low-speed gear, and the number of the first outer splines is 10-16. The novel gear shifting shaft assembly has the advantages of being smooth in gear shifting, low in gear shifting noise and reliable in structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a variable gear shaft, especially a novel variable gear shaft assembly. BACKGROUND

[0002] Since the gasoline, diesel and the like used by the motor vehicles such as automobiles and motorcycles belong to fossil energy, although the combustion of gasoline and diesel in the engine combustion chamber can drive the rotation of the crankshaft and output driving torque to the outside, it also discharges serious waste gas (automobile exhaust) to the atmosphere, directly endangering human health and causing serious harm to the environment. Despite the fact that humans have spent a lot of manpower, material resources and financial resources to control motor vehicle exhaust, it is still difficult to meet the relevant emission standards, and motor vehicle exhaust still pollutes the environment and endangers human health day after day. In order to avoid the pollution of fossil energy such as gasoline and diesel, people gradually use electric vehicles to replace traditional fuel vehicles to avoid the exhaust pollution of the engine of the fuel vehicle and harm human health. The gear transmission is an essential core assembly component for power transmission of electric vehicles, and the small-power motor inputs power to the gear transmission to amplify power output and drive the vehicle with greater torque.

[0003] For example, a driving assembly of an electric vehicle disclosed in Chinese patent document (application number: 202022484383.8) includes a driver, a gearbox connected with the output shaft of the driver, a transmission shaft arranged in the gearbox and connected with the wheels at both ends, a double gear engaged with the output shaft and a gear shaft engaged with the driven gear arranged in the gearbox, a gear one and a gear two engaged with the double gear movably arranged on the gear shaft, a driving wheel clamped on the gear shaft between the gear one and the gear two, and clamping bosses protruding on both sides of the driving wheel, and clamping holes matched with the clamping bosses formed on the gear one and the gear two. However, the gearbox of the electric vehicle has the problems of not smooth gear shifting and large gear shifting noise. SUMMARY

[0004] The utility model aims at the above-mentioned problems existing in the prior art, and provides a novel variable gear shaft assembly with smooth gear shifting, small gear shifting noise and reliable structure.

[0005] The utility model discloses a novel variable gear shaft assembly, including transmission shaft, the transmission shaft is fixedly connected with driving gear, transmission shaft is sequentially sleeved with high speed gear, variable speed ring and low speed gear, variable speed ring with transmission shaft is fixedly connected with the periphery, its characterized in that high speed gear, low speed gear one end of the outer side wall of the outside of variable speed ring is equipped with external spline no.

[0006] Through driving gear drive transmission shaft rotation, transmission shaft drives and its periphery fixedly connected variable speed ring rotation, through the yoke drives spline sleeve axial movement, makes spline sleeve and variable speed bad's external spline no.

[0007] In the above-mentioned novel variable gear shaft assembly, the outer side wall of spline sleeve is coaxially ring and is equipped with annular groove. The outer end of the yoke is embedded in the annular groove, which facilitates the axial movement of the spline sleeve driven by the yoke, and has the advantages of reliable operation and simple structure.

[0008] In the above-mentioned novel variable gear shaft assembly, the two ends of the variable speed ring are respectively abutted on one end face of the high speed gear and the low speed gear, and the other end of the high speed gear is abutted on the inner end face of the driving gear. The above arrangement has the advantages of convenient assembly and good axial limiting effect.

[0009] In the above-mentioned novel variable gear shaft assembly, the other end of the transmission shaft with the driving gear is ring equipped with the clamping groove, the clamping groove is embedded with the elastic check ring, and the end face of the other end of the low speed gear is abutted on the elastic check ring. By setting the elastic check ring, it has the advantages of good axial limiting effect, simple structure and low manufacturing cost.

[0010] In the above-mentioned novel variable gear shaft assembly, the number of keys of the external spline no. of the high speed gear and the low speed gear is 12. The above arrangement makes the novel variable gear shaft assembly have the advantages of smooth gear shifting, low gear shifting noise and reliable structure.

[0011] In the new shift shaft assembly, the driving gear and the transmission shaft are in an integral structure. The driving gear and the transmission shaft are in an integral structure, which has the advantages of high strength and long service life.

[0012] In the new shift shaft assembly, the number of keys of the outer spline one of the high-speed gear is twice the number of keys of the inner spline of the spline sleeve.

[0013] In the new shift shaft assembly, the end surface of the low-speed gear is coaxially provided with an annular protrusion, which is located outside the outer spline one. The above arrangement improves the strength of the low-speed gear, thereby improving the service life.

[0014] Compared with the prior art, the new shift shaft assembly has the following advantages:

[0015] 1. By moving the spline sleeve axially by the shift fork, the spline sleeve is engaged with the outer spline two of the shift ring and the spline one of the high-speed gear, or the spline sleeve is engaged with the outer spline two of the shift ring and the spline one of the low-speed gear, thereby realizing the switching of high-speed gear or low-speed gear, and having the advantages of reliable and stable work and high transmission efficiency.

[0016] 2. The number of keys of the outer spline one of the high-speed gear and the low-speed gear is 10-16, which makes the new shift shaft assembly have the advantages of smooth gear shifting, low gear shifting noise and reliable structure.

[0017] 3. The two ends of the shift ring are respectively abutted on the end surface of the high-speed gear and the low-speed gear, and the other end of the high-speed gear is abutted on the inner end surface of the driving gear, which has the advantages of convenient assembly and good axial limiting effect.

[0018] 4. The driving gear and the transmission shaft are in an integral structure, which has the advantages of high strength and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the new shift shaft assembly.

[0020] Figure 2 is a front view of the new shift shaft assembly.

[0021] Figure 3 is an A-A sectional view of Figure 2 .

[0022] Figure 4 is an exploded view of the new shift shaft assembly.

[0023] In the figure, 1, transmission shaft; 1a, driving gear; 1b, clamping groove; 2, high-speed blocking gear; 3, variable speed ring; 4, low-speed blocking gear; 4a, annular convex body; 5, outer spline one; 6, outer spline two; 7, spline sleeve; 7a, inner spline; 7b, annular groove; 8, elastic check ring. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0025] As Figures 1 to 4 shown, the novel variable gear shaft assembly, including transmission shaft 1, transmission shaft 1 is fixedly connected with driving gear 1a, transmission shaft 1 is sequentially sleeved with high-speed blocking gear 2, variable speed ring 3 and low-speed blocking gear 4, variable speed ring 3 is fixedly connected with transmission shaft 1 circumferentially, the outer side wall of the one end of high-speed blocking gear 2, low-speed blocking gear 4 close to variable speed ring 3 is provided with outer spline one 5, the outer side wall of variable speed ring 3 is provided with outer spline two 6, the outer side of variable speed ring 3 is provided with spline sleeve 7, spline sleeve 7 is coaxially annularly provided with annular groove 7b, the inner side wall of spline sleeve 7 is provided with inner spline 7a, which is engaged with outer spline two 6, spline sleeve 7 can be axially moved and can be engaged with the outer spline one 5 of high-speed blocking gear 2, low-speed blocking gear 4, the number of keys of outer spline one 5 of high-speed blocking gear 2, low-speed blocking gear 4 is 10-16. As preferred, the number of keys of outer spline one 5 of high-speed blocking gear 2, low-speed blocking gear 4 is 12, and the number of keys of inner spline 7a of spline sleeve 7 is 6, so that the novel variable gear shaft assembly has the advantages of smooth gear shifting, low gear shifting noise and reliable structure.

[0026] The two ends of variable speed ring 3 are respectively abutted on the one end face of high-speed blocking gear 2 and low-speed blocking gear 4, and the other end of high-speed blocking gear 2 is abutted on the inner end face of driving gear 1a, which has the advantages of convenient assembly and good axial limiting effect.

[0027] The other end of transmission shaft 1 is annularly provided with clamping groove 1b, and elastic check ring 8 is embedded in clamping groove 1b, and the end face of the other end of low-speed blocking gear 4 is abutted on elastic check ring 8, which has the advantages of good axial limiting effect, simple structure and low manufacturing cost.

[0028] Driving gear 1a and transmission shaft 1 are an integral structure, which has the advantages of high strength and long service life.

[0029] The end face of low-speed blocking gear 4 is coaxially provided with annular convex body 4a, and annular convex body 4a is located on the outer side of outer spline one 5, which improves the strength of low-speed blocking gear 4 and thus improves the service life.

[0030] The transmission shaft 1 is driven to rotate by the driving gear 1a, and the transmission shaft 1 drives the variable speed ring 3 fixedly connected in the circumferential direction to rotate, the outer end of the shift fork is embedded in the annular groove 7b, the spline sleeve 7 is axially moved by the shift fork, and the spline sleeve 7 is engaged with the outer spline two 6 of the variable speed gear and the spline one of the high-speed gear 2 or the spline one of the low-speed gear 4, so that the high-speed gear or the low-speed gear is switched, and the transmission efficiency is high, the number of keys of the spline one 5 of the high-speed gear 2 and the low-speed gear 4 is 12, and the gear shifting is smooth, the gear shifting noise is small, and the structure is reliable. The spline sleeve 7 is axially moved by the shift fork, and the structure is simple and reliable.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0032] Although the terms such as transmission shaft 1, driving gear 1a, clamping groove 1b, high-speed gear 2, variable speed ring 3, low-speed gear 4, annular convex body 4a, outer spline one 5, outer spline two 6, spline sleeve 7, inner spline 7a, annular groove 7b, elastic retainer 8 are used more in this paper, but the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A novel shift shaft assembly, comprising a transmission shaft (1) to which a driving gear (1a) is fixed, a high-speed shift gear (2), a shift ring (3) and a low-speed shift gear (4) are sequentially sleeved on the transmission shaft (1), and the shift ring (3) is circumferentially fixed to the transmission shaft (1), characterized in that, The high-speed gear (2) and the low-speed gear (4) are provided with an outer spline (5) on the outer side wall of one end of the shift ring (3), the shift ring (3) is provided with an outer spline (6) on the outer side wall, the shift ring (3) is provided with a spline sleeve (7) on the outer side, the inner side wall of the spline sleeve (7) is provided with an inner spline (7a) engaged with the outer spline (6), the spline sleeve (7) can be axially moved and the inner spline (7a) can be engaged with the outer spline (5) of the high-speed gear (2) and the low-speed gear (4), the number of keys of the outer spline (5) of the high-speed gear (2) and the low-speed gear (4) is 10-16.

2. The novel shift shaft assembly of claim 1, wherein, The outer side wall of the spline sleeve (7) is coaxially provided with an annular groove (7b).

3. The novel shift shaft assembly of claim 1, wherein, The two ends of the shift ring (3) are respectively abutted on the end faces of the high-speed gear (2) and the low-speed gear (4), and the other end of the high-speed gear (2) is abutted on the inner end face of the driving gear (1a).

4. The novel shift shaft assembly of claim 3, wherein, The other end of the driving shaft (1) is provided with a clamping groove (1b), the elastic retainer (8) is embedded in the clamping groove (1b), and the end face of the other end of the low-speed gear (4) is abutted on the elastic retainer (8).

5. The novel shift shaft assembly of claim 1 or 2 or 3 or 4, wherein, The number of keys of the outer spline (5) of the high-speed gear (2) and the low-speed gear (4) is 12.

6. The novel shift shaft assembly of claim 1 or 2 or 3 or 4, wherein, The driving gear (1a) and the driving shaft (1) are an integral structure.

7. The novel shift shaft assembly of claim 5, wherein, The number of keys of the outer spline (5) of the high-speed gear (2) and the low-speed gear (4) is twice the number of keys of the inner spline (7a).

8. The novel shift shaft assembly of claim 1 or 2 or 3 or 4, wherein, The end face of the low-speed gear (4) is coaxially provided with an annular convex body (4a), and the annular convex body (4a) is located on the outer side of the outer spline (5).

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