Shifting fork and shifting fork mechanism

Abstract

The utility model relates to the field of mechanical transmission, and discloses a shifting fork and a shifting fork mechanism. The shifting fork comprises a first shifting fork claw part and a second shifting fork claw part which are arranged in a spaced mode, the first shifting fork claw part is provided with a first cohesion contact position, the second shifting fork claw part is provided with a second cohesion contact position, and a circular cohesion area is further defined between the first shifting fork claw part and the second shifting fork claw part. The distance from the circle center of the circular cohesion area to the first cohesion contact position is equal to the distance from the circle center to the second cohesion contact position; the shifting fork further comprises a shifting fork handle part, the shifting fork handle part is connected between the first cohesion contact position and the second cohesion contact position, and the shifting fork handle part is arranged to avoid the circular cohesion area. The arrangement that the shifting fork handle part avoids the circular cohesion area jointly formed by the first shifting fork claw part and the second shifting fork claw part can allow the shifting fork to conduct radial displacement within a certain range, the possibility that the end, away from the circular cohesion area, of the shifting fork interferes with the shell is reduced, and then the shifting fork is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical transmission, and particularly relates to a shift fork and a shift fork mechanism. BACKGROUND

[0002] The shift fork is an important component in the electric drive box. The shift fork is mounted on the ring groove of the meshing sleeve and is used to push the meshing sleeve to mesh with different gears, so that the electric drive box can obtain the required transmission ratio. The design of the shift fork needs to consider the convenience of assembly and disassembly, and improve the production and maintenance efficiency.

[0003] However, due to the space limitation of the shell of the electric drive box, the end of the shift fork close to the shell is easy to interfere with the shell during assembly and disassembly in the prior art, resulting in difficult assembly of the shift fork. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a shift fork and a shift fork mechanism to facilitate the assembly of the shift fork.

[0005] To achieve the above-mentioned purpose, the present application provides a shift fork in one aspect, which comprises: a first shift fork jaw part and a second shift fork jaw part arranged at intervals, the first shift fork jaw part is provided with a first embracing contact position, the second shift fork jaw part is provided with a second embracing contact position, a circular embracing area is further formed between the first shift fork jaw part and the second shift fork jaw part, the distance from the center of the circular embracing area to the first embracing contact position is equal to the distance from the center of the circular embracing area to the second embracing contact position; a shift fork handle part is connected between the first embracing contact position and the second embracing contact position, and the shift fork handle part is arranged to avoid the circular embracing area.

[0006] In some embodiments, the first shift fork jaw part is provided with a first embracing arc surface, the first embracing contact position is located on the first embracing arc surface and is used to contact the peripheral wall of the sectional circular part when the first shift fork jaw part embraces the sectional circular part, the second shift fork jaw part is provided with a second embracing arc surface, and the second embracing contact position is located on the second embracing arc surface and is used to contact the peripheral wall of the sectional circular part when the second shift fork jaw part embraces the sectional circular part.

[0007] In some embodiments, the shift fork handle part comprises a transition connecting edge connected between the first embracing contact position and the second embracing contact position, and the transition connecting edge is located on the radial outside of the circular embracing area.

[0008] In some embodiments, the transition connecting edge is a circular arc transition surface, the radius of the circular arc transition surface is greater than the radius of the circular embracing area, and the circular arc transition surface and the circular embracing area have the same center.

[0009] In some embodiments, the shift fork handle part is formed with a hollow structure.

[0010] In some embodiments, the peripheral side of the shift fork handle part is formed with a reinforcing structure arranged perpendicularly to the shift fork handle part.

[0011] In some embodiments, the shifter handle is provided with a shifter shaft hole for guiding axial movement of the shifter shaft.

[0012] In some embodiments, the shifter further comprises a shift paddle connected to the circumferential side of the shifter handle and located on the side of the shifter handle away from the circular embracing area.

[0013] Another aspect of the present application protects a shifter mechanism comprising: the shifter described above; a cross-section circular part; wherein when the first shifter jaw part and the second shifter jaw part embrace the cross-section circular part, the cross-section of the cross-section circular part covers the circular embracing area.

[0014] In some embodiments, the cross-section circular part is a meshing sleeve.

[0015] Through the technical solution described above, the shifter provided by the embodiments of the present application has the following beneficial effects:

[0016] In the technical solution of the present application, the target part can be poked by the first shifter jaw part and the second shifter jaw part. The shifter handle avoids the circular embracing area formed by the first shifter jaw part and the second shifter jaw part, which makes the shifter further adhere to the target part along the radial direction of the circular embracing area, thereby reducing the possibility of interference between the shifter away from one end of the circular embracing area and the shell, and further facilitating the assembly of the shifter.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0019] Figure 1 is a structural schematic diagram of a shifter according to the specific embodiments of the present application;

[0020] Figure 2 is a structural schematic diagram of the shifter in Figure 1 according to the first step of assembly to the shifter mechanism;

[0021] Figure 3 is a structural schematic diagram of the shifter in Figure 1 according to the second step of assembly to the shifter mechanism;

[0022] Figure 4 is a structural schematic diagram of the shifter inFigure 1 Fig. 3 is a schematic view of the structure of the shift fork in the third step of assembly to the shift fork mechanism.

[0023] Legend of reference signs

[0024] C circular embracing area 100 shift fork

[0025] 110 shift fork handle 111 transition connecting edge

[0026] 112 reinforcing structure 113 shift fork shaft hole

[0027] 114 hollow structure 120 first shift fork claw portion

[0028] 121 clamping plate 130 second shift fork claw portion

[0029] 140 shift paddle 200 engagement sleeve

[0030] 300 output shaft 400 shift fork shaft

[0031] 500 shift actuator 600 housing DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0033] The shift fork and the shift fork mechanism according to the present application will be described below with reference to the accompanying drawings.

[0034] The present application discloses a novel shift fork 100, as shown in a specific embodiment, the shift fork 100 comprises: Figure 1 a first shift fork claw portion 120 and a second shift fork claw portion 130 arranged at intervals, a circular embracing area C is formed between the first shift fork claw portion 120 and the second shift fork claw portion 130, the distance from the center of the circular embracing area C to the first shift fork claw portion 120 is equal to the distance from the center of the circular embracing area C to the second shift fork claw portion 130;

[0035] a shift fork handle 110 connected between the first shift fork claw portion 120 and the second shift fork claw portion 130, the shift fork handle 110 is arranged to avoid the circular embracing area C.

[0036] a shift fork handle 110 connected between the first shift fork claw portion 120 and the second shift fork claw portion 130, the shift fork handle 110 is arranged to avoid the circular embracing area C.

[0037] When the first shift fork pawl 120 and the second shift fork pawl 130 engage the circular cross-section part, the position where the first shift fork pawl 120 contacts the peripheral wall of the circular cross-section part is the first engagement contact position, and the position where the second shift fork pawl 130 contacts the peripheral wall of the circular cross-section part is the second engagement contact position. In the existing shift fork structure, after the first shift fork pawl and the second shift fork pawl engage the circular cross-section part, the shift fork handle also contacts the peripheral wall of the circular cross-section part, causing the shift fork 100 to be unable to perform radial position adjustment. In this application, by avoiding the circular engagement area, after the first shift fork pawl 120 and the second shift fork pawl 130 engage the circular part, the shift fork can continue to move radially, causing the circular part to move towards the shift fork pawl 110. This allows for fine-tuning of the shift fork 100's position. Therefore, when the shift fork pawl 110 is too long and interferes with the transmission mechanism around the circular part, radial fine-tuning of the shift fork 100 ensures smooth insertion. Furthermore, the distance from the center of the circular engagement area C to the first engagement contact position is equal to the distance from the center to the second engagement contact position. This helps to balance the force on the circular part when the shift fork 100 moves it, thus ensuring the stability of the shift fork 100's operation. The first shift fork pawl 120 and the second shift fork pawl 130 are not limited to... Figure 1 The arc shape shown can also be other shapes.

[0038] It is understandable that when the circular part continues to move toward the shift fork handle 110, the first shift fork claw 120 and the second shift fork claw 130 will release their contact with the circular part. At this time, the circular part is only engaged or limited by the shift fork handle 110 located between the first engagement contact position and the second engagement contact position.

[0039] In this embodiment, such as Figure 1 As shown, the first shift fork pawl 120 may have a first engaging arc surface. The first engaging contact position is located on the first engaging arc surface and is used to contact the peripheral wall of the circular part when the first shift fork pawl 120 engages with the circular part. The second shift fork pawl 130 has a second engaging arc surface. The second engaging contact position is located on the second engaging arc surface and is used to contact the peripheral wall of the circular part when the second shift fork pawl 130 engages with the circular part. In this way, the distance from the center of the circle to each point of the first shift fork pawl 120 and the second shift fork pawl 130 is equal, thereby further balancing the force on the target part and improving the shifting effect. See also... Figure 1The first shifting fork jaw part 120 and the second shifting fork jaw part 130 can be provided with a clamping plate 121 on the side close to the circular clamping area C. The clamping plate 121 is perpendicular to the circular clamping area C, so as to improve the clamping effect of the first shifting fork jaw part 120 and the second shifting fork jaw part 130 on the target part (i.e. the part with a circular cross section) and the structural strength. It should be noted that the part with a circular cross section refers to the part with a circular outer periphery in cross section.

[0040] In the embodiment, as shown in Figure 1 , the shifting fork handle part 110 can include a transition connecting edge 111 connected between the first clamping curved surface and the second clamping curved surface. The transition connecting edge 111 is located on the radial outer side of the circular clamping area C. In this way, the shifting fork handle part 110 can avoid the circular clamping area C, so that the shifting fork 100 can further fit the target part in the radial direction of the circular clamping area C.

[0041] It can be understood that the area of the shifting fork from the first clamping contact position to the second clamping contact position is the area of the shifting fork handle part 110.

[0042] In the embodiment, as shown in Figure 1 , the transition connecting edge 111 can be a circular arc transition surface. The radius of the circular arc transition surface is greater than the radius of the circular clamping area C, and the circular arc transition surface and the circular clamping area C have the same center. In this way, not only can the shifting fork 100 further fit the target part in the radial direction of the circular clamping area C, but also the overall structure is simple and convenient to process.

[0043] In the embodiment, the shifting fork handle part 110 can be formed with a hollow structure 114. The hollow structure 114 is mainly designed to reduce the material usage and overall weight of the shifting fork handle part 110 under the premise of ensuring structural strength and functionality, i.e. by removing the part of the material that contributes less to the structural strength, to improve the overall lightweight. Specifically, as shown in Figure 1 , the middle part of the shifting fork handle part 110 is formed with a through hole. Of course, the hollow structure 114 can be provided in other forms according to the need of the working load, such as a weight-reducing groove.

[0044] In the embodiment, as shown in Figure 1 , the circumferential side of the shifting fork handle part 110 can be formed with a reinforcing structure 112 perpendicular to the shifting fork handle part 110. In this way, the structural strength of the shifting fork 100 can be improved, and the working load capacity and reliability of the shifting fork 100 can be improved.

[0045] In the embodiment, the shifting fork handle part 110 includes a shifting fork shaft hole 113. As shown in Figure 1Since the shifting fork 100 of the present application can move radially, in order to avoid the radial movement of the shifting fork 100 when moving axially, the shifting fork 100 of the present application is provided with a shifting fork shaft hole 113, which cooperates with the guide pin shaft (such as the shifting fork shaft 400) to limit the axial movement path of the shifting fork 100. Specifically, the shifting fork shaft hole 113 is arranged on the shifting fork handle 110 away from one end of the circular embracing area C. Of course, the arrangement position of the shifting fork shaft hole 113 is not limited to the position shown in the figure, and it can also be arranged at other positions.

[0046] In the present embodiment, as shown in Figure 1 The shifting fork 100 can further include:

[0047] The shift paddle 140 is connected to the side of the shifting fork handle 110 away from the circular embracing area C.

[0048] As an example, the shift paddle 140 can be driven by the shift lever of the shift actuator 500, so as to drive the entire shifting fork 100 to move perpendicular to the circular embracing area C. Specifically, the shift paddle 140 is arranged on the shifting fork handle 110 away from one end of the circular embracing area C and extends away from the circular embracing area C. Among them, the shift paddle 140 can be partially recessed, thereby forming a shift paddle groove adapted to the shift lever of the shift actuator 500, so as to limit the radial movement of the shifting fork 100 and ensure the effect of the shift lever on the shift paddle 140; the shift paddle 140 can be arranged adjacent to the shifting fork shaft hole 113, thereby improving the stability of the overall movement of the shifting fork 100. Of course, the arrangement position of the shift paddle 140 is not limited to the end of the shifting fork handle 110 away from the circular embracing area C, and it can also be arranged at other positions according to the arrangement needs of the shift lever.

[0049] The present application discloses a new type of shifting fork mechanism, and the shifting fork mechanism in a specific embodiment includes:

[0050] The shifting fork 100 described above;

[0051] The cross-sectional circular part;

[0052] Among them, when the first shifting fork jaw 120 and the second shifting fork jaw 130 embrace the cross-sectional circular part, the cross-sectional circular part blocks the circular embracing area C. Obviously, the shifting fork mechanism also has all the technical effects of the shifting fork 100 described above, and therefore will not be described here.

[0053] In the present embodiment, as shown in Figure 1As shown, the circular cross-section part can be a meshing sleeve 200. The meshing sleeve 200 is sleeved on the output shaft 300 of the shift fork mechanism and can move axially. The inner circumference of the meshing sleeve 200 has internal teeth that are adapted to the external teeth on the outer circumference of the output shaft 300, so that the meshing sleeve 200 is circumferentially fixed relative to the output shaft 300. An annular groove is formed on the meshing sleeve 200 and arranged around its outer circumference. The first shift fork pawl 120 and the second shift fork pawl 130 are inserted into the two ends of the annular groove respectively in the radial direction of the meshing sleeve 200 (at this time, the inner end face of the first shift fork pawl 120 and the inner end face of the second shift fork pawl 130 are both located in the cross-section of the circular cross-section part), and can push the meshing sleeve 200 in the axial direction.

[0054] In summary, the specific assembly process of the shift fork 100 in the shift fork mechanism can be as follows:

[0055] First step: As Figure 2 As shown, after the engagement sleeve 200 is fitted onto the output shaft 300, the first shift fork claw portion 120 and the second shift fork claw portion 130 of the shift fork 100 are inserted into the annular groove until the transition connecting edge 111 abuts against the engagement sleeve 200. The output shaft 300, engagement sleeve 200, and shift fork 100 are then placed into the housing 600 of the shift fork mechanism. Compared to the shift fork 100 in the prior art, the shift fork 100 of this application has a larger insertion depth relative to the annular groove after the transition connecting edge 111 abuts against the engagement sleeve 200, due to the shift fork handle portion 110 avoiding the circular engagement area C. This results in ample clearance space between the end of the shift fork 100 (i.e., the shift paddle 140) and the housing 600, making it less susceptible to interference from manufacturing tolerances and other factors.

[0056] Second step: As Figure 3 As shown, after the output shaft 300, engagement sleeve 200 and shift fork 100 are placed into the housing 600 of the shift fork mechanism, the shift fork 100 is moved outward along the radial direction of the output shaft 300 so that the shift fork shaft hole 113 is aligned with the shift fork shaft mounting hole of the housing 600, and the shift fork shaft 400 is assembled so that it passes through the shift fork shaft hole 113 and the shift fork shaft mounting hole in sequence.

[0057] Third step: as follows Figure 4 As shown, after the shift fork shaft 400 passes through the shift fork shaft hole 113 and the shift fork shaft 400 mounting hole, the shift lever of the shift actuator 500 is inserted into the shift slot, and then the shift actuator 500 is fixed to the housing 600 with bolts.

[0058] In the description of the application, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0060] In the description of the 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 application. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

Claims

1. A fork, characterized in that, The shift fork (100) comprises: a first shift fork jaw portion (120) and a second shift fork jaw portion (130) arranged at intervals, the first shift fork jaw portion (120) being provided with a first embracing contact position, the second shift fork jaw portion (130) being provided with a second embracing contact position, a circular embracing area (C) being further formed between the first shift fork jaw portion (120) and the second shift fork jaw portion (130), a distance from a center of the circular embracing area (C) to the first embracing contact position being equal to a distance from the center of the circular embracing area (C) to the second embracing contact position; a shift fork handle portion (110) connected between the first embracing contact position and the second embracing contact position, the shift fork handle portion (110) being arranged to avoid the circular embracing area (C).

2. The fork according to claim 1, characterized in that The first shift fork jaw portion (120) is provided with a first embracing curved surface, and the first embracing contact position is located on the first embracing curved surface and used to contact a peripheral wall of a section circular part when the first shift fork jaw portion (120) embraces the section circular part; the second shift fork jaw portion (130) is provided with a second embracing curved surface, and the second embracing contact position is located on the second embracing curved surface and used to contact the peripheral wall of the section circular part when the second shift fork jaw portion (130) embraces the section circular part.

3. The fork according to claim 2, characterized in that The shift fork handle portion (110) comprises a transition connecting edge (111) connected between the first embracing contact position and the second embracing contact position, and the transition connecting edge (111) is located on a radial outside of the circular embracing area (C).

4. The fork according to claim 3, characterized in that The transition connecting edge (111) is a circular arc transition surface, a radius of the circular arc transition surface is greater than a radius of the circular embracing area (C), and the circular arc transition surface and the circular embracing area (C) have the same center.

5. The fork according to any one of claims 1 to 4, characterized in that The shift fork handle portion (110) is formed with a hollow structure (114).

6. The fork according to any one of claims 1 to 4, characterized in that A peripheral side of the shift fork handle portion (110) is formed with a reinforcing structure (112) arranged perpendicularly to the shift fork handle portion (110).

7. The fork according to any one of claims 1 to 4, characterized in that The shift fork handle portion (110) is provided with a shift fork shaft hole (113) used to guide axial movement of the shift fork (100).

8. The fork according to any one of claims 1 to 4, characterized in that The shift fork (100) further comprises a shift paddle (140) connected to a peripheral side of the shift fork handle portion (110) and located on a side of the shift fork handle portion (110) facing away from the circular embracing area.

9. A fork mechanism, characterized in that The shift fork (100) comprises: The shift fork according to any one of claims 1 to 8; The section circular part; When the first shift fork jaw portion (120) and the second shift fork jaw portion (130) embrace the section circular part, a section of the section circular part hides the circular embracing area (C).

10. The fork mechanism of claim 9, wherein, The section circular part is a meshing sleeve (200).

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