Gear shifting mechanism capable of achieving axial compensation

Abstract

The utility model discloses a gear shifting mechanism capable of axially compensating. The gear shifting mechanism comprises a shifting fork, a gear shifting shaft and a locking shaft, the shifting fork is arranged on the gear shifting shaft and the locking shaft in a sleeving mode. The locking shaft abuts against the gear shifting shaft and is in sliding fit with the gear shifting shaft. The gear shifting mechanism further comprises a locking assembly, and the locking assembly can drive the locking shaft to move to fix the shifting fork, the locking shaft and the gear shifting shaft after the position of the shifting fork on the gear shifting shaft is determined. Thus, the axial position of the shifting fork on the gear shifting shaft can be flexibly adjusted through the locking assembly, the shifting fork can be fixed to the gear shifting shaft through the locking assembly, then the mechanism can be matched with various types of gearboxes, the gearboxes can be allowed to have larger assembly errors, the assembly difficulty can be effectively reduced, and the assembly efficiency is improved. And the part matching difficulty can be reduced, the matching rate of the parts can be effectively improved, and the assembly efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of speed change gear shift structure, especially to a gear shift mechanism of axial compensation. BACKGROUND

[0002] The shift fork gear shift mechanism has many parts, and the axial dimension chain is long, so the shift fork and the gear shift gear are prone to position offset during assembly. The prior art disclosed in the existing technology with the announcement number CN102454712B discloses an axial compensation device. It comprises a rotating wheel and a compensation disc installed on a rotating shaft, the rotating shaft is fixed in the circumferential direction with the rotating wheel, the rotating shaft is provided with a first axial limiting structure and a second axial limiting structure for limiting the axial position of the rotating wheel on both sides of the rotating wheel, the compensation disc is located between the first axial limiting structure and the rotating wheel, the compensation disc is provided with an arc-shaped groove, the depth of the arc-shaped groove is gradually changed, the rotating wheel is provided with a blind hole, the blind hole is provided with a compression elastic member, and the arc-shaped groove contains a sliding pin.

[0003] In the prior art, in order to realize the axial compensation, an elastic member and a special-shaped structure are arranged between the lower shaft and the transmission member, so that the structure of the axial compensation is more complex, and the transmission process is prone to stagnation due to passive compensation by the elastic member. SUMMARY

[0004] In order to solve the problem of complex structure of axial compensation in the prior art, the purpose of the utility model is to provide a gear shift mechanism of axial compensation, which can more accurately position the positions between the shift fork and the gear shift shaft in the gear shift mechanism, and reduce the assembly difficulty of the speed change structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a gear shift mechanism of axial compensation, comprising a shift fork, a gear shift shaft and a locking shaft; the shift fork is sleeved on the gear shift shaft and the locking shaft, and the locking shaft is in abutment and sliding fit with the gear shift shaft; further comprising a locking assembly, which can drive the locking shaft to move to fix the shift fork, the locking shaft and the gear shift shaft after determining the position of the shift fork on the gear shift shaft.

[0006] As a preferred, the shift fork is provided with a first hole and a second hole, and the first hole and the second hole are in communication with each other; the gear shift shaft passes through the first hole, and the locking shaft passes through the second hole; the locking shaft comprises a locking portion with gradually changing volume; the locking assembly can pull the locking shaft to move in the second hole until the locking portion of the locking shaft abuts against the inner wall of the second hole, so as to fix the shift fork on the gear shift shaft.

[0007] As a preferred, the first hole and the second hole are cross arranged.

[0008] As preferred, the shift shaft is provided with a first corrugated groove extending along the axial direction of the shift shaft; the locking shaft is provided with a second corrugated groove; the continuously corrugated inner wall of the second corrugated groove is inserted into the continuously corrugated inner wall of the first corrugated groove, so as to effectively limit the axial position of the shift fork on the shift shaft.

[0009] As preferred, the locking shaft is provided with a slope, and the second corrugated groove is arranged on the slope.

[0010] As preferred, the length of the first corrugated groove is greater than the length of the second corrugated groove.

[0011] As preferred, the shift shaft is provided with a relief groove, and the first corrugated groove is arranged on the inner wall of the relief groove; the locking shaft is inserted into the relief groove, so that the second corrugated groove is inserted into the first corrugated groove.

[0012] As preferred, the locking shaft comprises a connecting portion, and the connecting portion of the locking shaft can be extended from the shift fork and is threadedly connected with the nut of the locking assembly.

[0013] As preferred, the locking assembly further comprises a large washer and a spring washer, the large washer and the spring washer are sleeved on the connecting portion of the locking shaft, and the large washer and the spring washer are arranged between the nut and the shift fork; the spring washer is located between the large washer and the thread.

[0014] As preferred, the shift shaft is provided with a plurality of shift positions; the position of the shift fork on the shift shaft can be determined according to the matching of the gearshift gear of the gearbox and the shift position of the shift shaft.

[0015] The beneficial effects of the technical scheme of the utility model are as follows: the shift fork can be fixed on the shift shaft through the locking assembly, the axial position of the shift fork on the shift shaft can be flexibly adjusted through the locking assembly, so that the mechanism can match various types of gearboxes, the gearbox can have a larger assembly error, the assembly difficulty can be effectively reduced, the part selection difficulty can be reduced, the matching rate of the parts can be effectively improved, and the assembly efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the gear shifting mechanism Figure 1

[0017] Figure 2 It is a structure diagram of the gear shifting mechanism Figure 2

[0018] Figure 3 It is a sectional view in A-A direction Figure 2

[0019] Figure 4 It is a sectional view in B-B direction Figure 2 ​​​​

[0020] Figure 5 For Figure 3 Enlarged view at C;

[0021] Figure 6 Structure diagram of the locking shaft;

[0022] Figure 7 Structure diagram of the shift shaft;

[0023] Figure 8 For Figure 7 Sectional view in direction D-D;

[0024] Figure 9 Structure diagram of the shift fork.

[0025] Reference signs: 1, shift shaft; 11, avoiding groove; 12, first corrugated groove; 13, first shift position; 14, second shift position; 15, third shift position;

[0026] 2, shift fork; 21, first hole; 22, second hole;

[0027] 3, locking shaft; 31, locking portion; 32, second corrugated groove; 33, connecting portion; 34, third hole;

[0028] 4, locking assembly; 41, large washer; 42, spring washer; 43, nut; 44, cotter pin. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly limited.

[0032] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature of the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature of the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature of the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. Embodiment

[0034] As Figures 1 to 9 The axial compensation shifting mechanism shown comprises a shift fork 2, a shifting shaft 1 and a locking shaft 3; the shift fork 2 is sleeved on the shifting shaft 1 and the locking shaft 3, and the locking shaft 3 abuts against the shifting shaft 1 and is in sliding fit; further comprising a locking assembly 4, which can drive the locking shaft 3 to move to fix the shift fork 2, the locking shaft 3 and the shifting shaft 1 after the position of the shift fork 2 on the shifting shaft 1 is determined.

[0035] In this way, the axial position of the shift fork on the shifting shaft can be flexibly adjusted by the locking assembly, thereby reducing the difficulty of part selection, effectively improving the matching rate of parts, greatly improving the assembly efficiency and reducing the difficulty of positioning the shift fork and the shifting shaft.

[0036] In the embodiment, as Figure 3 and Figure 9As shown, the shift fork 2 is provided with a first hole 21 and a second hole 22, which are arranged intersectingly and are connected to each other; the shift shaft 1 passes through the first hole 21 and the locking shaft 3 passes through the second hole 22. The locking shaft 3 includes a locking part 31 with a gradually changing volume.

[0037] The locking assembly 4 can pull the locking shaft 3 to move in the second hole 22 until the shift shaft 1 pushes the locking part 31 of the locking shaft 3 against the inner wall of the second hole 22, thereby fixing the shift fork 2 on the shift shaft 1.

[0038] Furthermore, such as Figure 3 , Figures 5 to 8 As shown, the shift shaft 1 is provided with a first corrugated groove 12, which extends along the axial direction of the shift shaft 1; the locking part 31 is provided with an inclined surface, and a second corrugated groove 32 is provided on the inclined surface, the first corrugated groove 12 and the second corrugated groove 32 are matched; the length of the first corrugated groove 12 is greater than the length of the second corrugated groove 32; the continuous corrugated inner wall of the second corrugated groove 32 is interlocked with the continuous corrugated inner wall of the first corrugated groove 12. This effectively restricts the axial position of the shift fork on the shift shaft and ensures that there are sufficient mating positions on the shift shaft to fix the shift fork.

[0039] Furthermore, the shift shaft 1 is provided with a relief groove 11, and the first corrugated groove 12 is provided on the inner wall of the relief groove 11; the locking shaft 3 is inserted into the relief groove 11, and the continuous corrugated inner wall of the second corrugated groove 32 is interlocked with the continuous corrugated inner wall of the first corrugated groove 12.

[0040] In this embodiment, as Figures 1 to 3 As shown, the locking assembly 4 includes a nut 43, and the locking shaft 3 includes a connecting part 33 with a thread on it. The connecting part 33 of the locking shaft 3 extends out from the second hole 22, and the nut 43 is threadedly connected to the connecting part 33 of the locking shaft 3. The nut 43 abuts against the shift fork 2. The clamping strength of the locking shaft 3, the shift fork 2 and the shift shaft 1 can be adjusted by rotating the nut 43.

[0041] Furthermore, the locking assembly 4 also includes a large washer 41 and a spring washer 42. The large washer 41 and the spring washer 42 are fitted onto the connecting part 33 of the locking shaft 3, and are positioned between the nut 43 and the shift fork 2; the spring washer 42 is located between the large washer 41 and the thread. A third hole 34 is provided on the connecting part 33 of the locking shaft 3, and a positioning groove is provided on the end face of the nut 43 facing away from the shift fork 2. The cotter pin 44 of the locking assembly 4 passes through the third hole 34 and is located in the positioning groove. In this way, the nut 43 can be loosened by the large washer 41, the spring washer 42, and the cotter pin 44.

[0042] In the embodiment, the shift shaft 1 is further provided with a first shift position 13, a second shift position 14 and a third shift position 15; the shift position and the position of the gear of the gearbox are matched, and then the position of the shift fork on the shift shaft is determined.

[0043] When the shift structure is assembled in the gearbox, the shift shaft 1 provided with the shift fork 2 is first installed in the gearbox, the matching position of the engagement sleeve of the synchronizer and the shift position on the shift shaft 1 are matched, then the position of the locking shaft 3 on the shift shaft 1 is adjusted by rotating the nut 43, the first corrugated groove 12 and the second corrugated groove 32 are inserted, the position of the shift fork 2 on the shift shaft 1 is adjusted and fixed. In this way, the shift fork 2 can be in the correct position, effectively compensating for the axial position deviation of the shift fork 2 and the engagement sleeve due to the large number of parts of the shift shaft 1 and the long size chain, the shaft system needs to increase the adjusting washer, or select the parts, the assembly difficulty problem is large, and the assembly efficiency is greatly improved.

[0044] In the embodiment, the specific structure of the gearbox can refer to the prior art documents with publication numbers CN220956689U, CN117869578A, CN220452657U and CN114151516A.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. An axially compensatable shift mechanism, characterized by: The application relates to a shift fork locking device, which comprises a shift fork (2), a shift shaft (1) and a locking shaft (3); the shift fork (2) is sleeved on the shift shaft (1) and the locking shaft (3), the locking shaft (3) is in abutment with the shift shaft (1) and is in sliding fit; the device further comprises a locking assembly (4), which can drive the locking shaft (3) to move and fix the shift fork (2), the locking shaft (3) and the shift shaft (1) after the position of the shift fork (2) on the shift shaft (1) is determined.

2. An axially compensating shift mechanism according to claim 1, characterized in that: The shift fork (2) is provided with a first hole (21) and a second hole (22), the first hole (21) and the second hole (22) are in communication with each other; the shift shaft (1) passes through the first hole (21), and the locking shaft (3) passes through the second hole (22); the locking shaft (3) comprises a locking portion (31) with a gradually changing volume. The locking assembly (4) can pull the locking shaft (3) to move in the second hole (22) until the locking portion (31) of the locking shaft (3) is in abutment with the inner wall of the second hole (22) and the shift shaft (1) pushes, so that the shift fork (2) is fixed on the shift shaft (1).

3. An axially compensating shift mechanism according to claim 2, characterized in that: The first hole (21) and the second hole (22) are cross arranged.

4. An axially compensating shift mechanism according to claim 1 wherein: The shift shaft (1) is provided with a first corrugated groove (12) extending along the axis direction of the shift shaft (1); the locking shaft (3) is provided with a second corrugated groove (32); the continuously corrugated inner wall of the second corrugated groove (32) and the continuously corrugated inner wall of the first corrugated groove (12) are mutually inserted, which can effectively limit the axial position of the shift fork (2) on the shift shaft (1).

5. An axially compensating shift mechanism according to claim 4, characterized in that: The locking shaft (3) is provided with a slope, and the second corrugated groove (32) is arranged on the slope.

6. An axially compensating shift mechanism according to claim 4 wherein: The length of the first corrugated groove (12) is greater than the length of the second corrugated groove (32).

7. An axially compensating shift mechanism according to claim 4 wherein: The shift shaft (1) is provided with an avoiding groove (11), and the first corrugated groove (12) is arranged on the inner wall of the avoiding groove (11); the locking shaft (3) is inserted into the avoiding groove (11), so that the second corrugated groove (32) and the first corrugated groove (12) are mutually inserted.

8. An axially compensating shift mechanism according to claim 1 wherein: The locking shaft (3) comprises a connecting portion (33), the connecting portion (33) of the locking shaft (3) can be stretched out of the shift fork (2) and is in threaded connection with a nut (43) of the locking assembly (4).

9. An axially compensating shift mechanism according to claim 7 wherein: The locking assembly (4) further comprises a large washer (41) and a spring washer (42), the large washer (41) and the spring washer (42) are sleeved on the connecting portion (33) of the locking shaft (3), and the large washer (41) and the spring washer (42) are arranged between the nut (43) and the shift fork (2); the spring washer (42) is located between the large washer (41) and the thread.

10. An axially compensating shift mechanism according to claim 1 wherein: The shift shaft (1) is provided with a plurality of shift positions; the position of the shift fork (2) on the shift shaft (1) can be determined according to the matching of the gear shift gear of the gearbox and the shift position of the shift shaft (1).

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