Gearbox swing type interlocking device and using method

Abstract

The invention relates to the technical field of gearboxes, in particular to a gearbox swing type interlocking device and a using method. The interlocking device comprises a swing mechanism, an elastic mechanism, an auxiliary box shifting fork shaft and a main box shifting fork shaft, the swing mechanism can swing around one end in a reciprocating mode, and a clamping hole is formed in the swing mechanism in a penetrating mode; an open locking groove is formed in the auxiliary box shifting fork shaft, and the side, provided with the locking groove, of the auxiliary box shifting fork shaft axially slides and abuts against the swing structure; the elastic mechanism is arranged at the other end of the swing mechanism and used for pushing the swing mechanism to abut against the auxiliary box shifting fork shaft. The main box shifting fork shaft is arranged in the clamping hole in a penetrating mode and provided with a limiting groove, the limiting groove is connected with the swing mechanism in a clamping mode when the swing mechanism abuts against the locking groove, and the main box shifting fork shaft can axially slide in the clamping hole when the swing mechanism abuts against the peripheral side wall of the auxiliary box shifting fork shaft. The swing mechanism is adjusted to swing through the locking groove so as to control separation and clamping connection of the swing mechanism and the limiting groove, axial movement of the main box shifting fork shaft is adjusted and controlled, and better smoothness is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and specifically refers to a swing-type interlock device for a gearbox and a usage method thereof. Background Art

[0002] At present, multi-speed manual gearboxes are generally composed of a main box and a secondary box. The secondary box is located on one side of the main box. Parallel main box shift forks and secondary box shift forks are respectively arranged in the main box and the secondary box. Shifting gears is achieved by moving the main box shift forks and the secondary box shift forks; the main box may or may not have a synchronizer, and the secondary box must be equipped with a synchronizer when shifting gears, and the shift switch is on the gearbox control handle. When shifting gears in the main box, the secondary box must be in place. Reducing the shifting time of the secondary box and avoiding excessive wear of the secondary box synchronizer. If the secondary box is not in place and the main box starts to shift gears, the secondary box synchronizer has to bear not only the rotational inertia of the input end of the secondary box but also the rotational inertia of the input end of the main box, exceeding the load of the secondary box synchronizer, resulting in a long shifting time and synchronizer wear; moreover, the integration degree of the gearbox is getting higher and higher, and the horizontal space inside the box body is limited; Patent No. Publication No. "CN214404651U" discloses a mechanical interlock structure for the main and secondary boxes, which has a complex structure, many components, high production costs, and a large horizontal occupied space. Summary of the Invention

[0003] The main purpose of the present invention is to solve the deficiencies in the above background art, and provide a swing-type interlock device for a gearbox and a usage method thereof.

[0004] The technical solution adopted by the present invention is: a swing-type interlock device for a gearbox, the device includes,

[0005] A swing mechanism, the swing mechanism can swing reciprocally around one end, and a clamping hole is penetrated through the swing mechanism;

[0006] A secondary box shift fork shaft, an open-shaped locking groove is arranged on the secondary box shift fork shaft, and one side of the secondary box shift fork shaft provided with the locking groove axially slides and abuts against the swing structure;

[0007] An elastic mechanism, the elastic mechanism is arranged at the other end of the swing mechanism for pushing the swing mechanism to abut against the secondary box shift fork shaft;

[0008] A main box shift fork shaft, the main box shift fork shaft is penetrated through the clamping hole, a limiting groove is arranged at the position corresponding to the clamping hole on the main box shift fork shaft, and when the swing mechanism abuts against the locking groove, the limiting groove clamps the swing mechanism, and when the swing mechanism abuts against the side wall of the secondary box shift fork shaft on one side of the locking groove, the limiting groove is separated from the swing mechanism so that the main box shift fork shaft can axially slide in the clamping hole.

[0009] A swing-type interlock device for a gearbox according to the present invention, wherein the main box shift fork shaft includes shift fork shafts a, b, and c arranged side by side, and the shift fork shafts a and c are provided with the limiting grooves; the shift fork shaft b is located between the shift fork shafts a and c and can axially slide in the card hole.

[0010] A swing-type interlock device for a gearbox according to the present invention, when the swing mechanism abuts against the locking groove of the auxiliary box shift fork shaft, the back sides of the shift fork shafts a and c are clamped to the swing mechanism through the limiting grooves; there is a gap between the shift fork shaft b and the hole wall of the card hole, and it can axially slide in the card hole when the swing mechanism abuts against the locking groove of the auxiliary box shift fork shaft or the side wall of the locking groove on one side in the axial direction.

[0011] A swing-type interlock device for a gearbox according to the present invention, a plurality of card holes are provided on the swing mechanism, the shift fork shafts a and c are respectively arranged in different card holes, and the shift fork shafts a and c are clamped to the swing mechanism through their respective limiting grooves when the swing mechanism abuts against the locking groove, and can axially slide in their respective passed card holes when the swing mechanism abuts against the side wall of the auxiliary box shift fork shaft on one side of the locking groove in the axial direction.

[0012] A swing-type interlock device for a gearbox according to the present invention, the swing mechanism includes a swing arm and a pin shaft, one end of the swing arm is hinged on the pin shaft and can swing around the pin shaft, and is restricted from moving in the axial direction of the pin shaft when installed in the gearbox, and the card hole is provided on the swing arm.

[0013] A swing-type interlock device for a gearbox according to the present invention, one end of the swing arm is a cam so that the swing arm has an eccentric wheel structure; the pin shaft is eccentrically arranged on the cam structure.

[0014] A swing-type interlock device for a gearbox according to the present invention, the pin shaft is located between the card hole and the auxiliary box shift fork shaft, and is used to amplify the rotation path of the card hole around the pin shaft.

[0015] A swing-type interlock device for a gearbox according to the present invention, the pin shaft is arranged on the side of the bottom end of the swing arm away from the card hole.

[0016] A swing-type interlock device for a gearbox according to the present invention, the elastic mechanism includes a spring; a convex column is provided at the other end of the swing mechanism, and the spring is sleeved on the convex column.

[0017] A swing-type interlock device for a gearbox according to the present invention, the limiting groove has an annular structure; the card hole is a rectangular structure; the cross section of the main box shift fork shaft is a rectangular structure.

[0018] A swing-type interlock device for a gearbox according to the present invention, the locking groove divides the auxiliary box shift fork shaft into a high gear section and a low gear section located on both sides of the locking groove in the axial direction.

[0019] On the other hand, the present invention also provides a method for using a swing-type interlock device of a gearbox. By adopting a swing-type interlock device of a gearbox provided by the present invention, the method includes:

[0020] Under the thrust of the elastic mechanism pushing the swing mechanism to abut against the secondary box shift fork shaft, axially move the secondary box shift fork shaft, so that the swing mechanism slides from abutting against the locking groove to abutting against the side wall of the secondary box shift fork shaft on one side of the locking groove;

[0021] When the swing mechanism abuts against the locking groove, the main box shift fork shaft restricts the axial movement of the main box shift fork shaft for gear shifting by engaging the swing mechanism in the clamping hole through the limiting groove;

[0022] When the swing mechanism abuts against the side wall of the secondary box shift fork shaft on one side of the locking groove, axially move the main box shift fork shaft to achieve gear shifting.

[0023] The beneficial effects of the present invention include: 1. By using the locking groove on the secondary box shift fork shaft as the state where the gear shifting is not in place, the swing mechanism abuts against the secondary box shift fork shaft through the elastic mechanism and relatively slides when the secondary box shift fork shaft moves. When the swing mechanism abuts against the locking groove, the main box shift fork shaft restricts the axial movement of the main box shift fork shaft for gear shifting by engaging the swing mechanism through the limiting groove. When the axial movement of the secondary box shift fork shaft for gear shifting is in place, the swing mechanism swings and then abuts against the side of the secondary box shift fork shaft on one side of the locking groove. When the limiting groove is separated from the swing mechanism, the main box shift fork shaft can axially move in the clamping hole to achieve gear shifting, avoiding the wear of the synchronizer caused by the main box gear shifting when the secondary box gear shifting is not in place. Adopting the swing type to control the movement of the main box shift fork shaft can also save the horizontal space inside the gearbox;

[0024] 2. The main box shift fork shaft includes multiple shift fork shafts to achieve more gears. The multiple shift fork shafts are arranged side by side and can engage the swing mechanism through the limiting groove in the same clamping hole to achieve the locking and unlocking of the multiple shift fork shafts;

[0025] 3. The shift fork shaft b can always axially slide in the clamping hole and can be used as the reverse gear, without the need to open a limiting groove on the shift fork shaft b, saving the production process;

[0026] 4. The swing mechanism can also be respectively engaged with different shift fork shafts through multiple clamping holes;

[0027] 5. The structure of the swing mechanism of the present invention is very simple. The swing is realized by the swing arm hinged around the pin shaft at one end. After the swing arm is installed, it is limited in the axial direction of the pin shaft, which can avoid the forced axial movement of the main box shift fork shaft to push the swing arm to move when the secondary box shift fork shaft fails to engage the gear, resulting in damage to the interlock device;

[0028] 6. The cam structure expands the end structure of the swing arm, facilitating the production of the clamping hole. The pin shaft is eccentrically arranged on the cam structure, which can expand the rotation path of the clamping hole around the pin shaft;

[0029] 7. The pin shaft is located between the clamping hole and the countershaft shift fork shaft, which can enlarge the rotation path of the clamping hole around the pin shaft, so that the swing arm can be fully clamped in the limiting groove before and after swinging;

[0030] 8. The present invention uses a spring as an elastic mechanism, which has a simple structure and relatively low production cost; the spring can be stably fixed by the convex post;

[0031] 9. The limiting groove is in an annular structure, so there is no need to check the circumferential installation angle of the main box shift fork shaft, which can avoid the situation that the main box shift fork shaft cannot be clamped with the swing mechanism or is always clamped with the swing mechanism due to the circumferential angular difference after installation;

[0032] 10. The locking groove divides the countershaft shift fork shaft into a high gear section and a low gear section, which can enable the gearbox to have more gears to meet different driving requirements;

[0033] 11. The usage method of the interlock device provided by the present invention makes full use of the structural characteristics of the interlock device provided by the present invention. The swing mechanism is pushed by the elastic mechanism to always abut against the countershaft shift fork shaft. Axially moving the countershaft shift fork shaft makes the swing mechanism abut against the locking groove and gradually turn to abut against the side wall on one side of the locking groove. During this process, when the swing mechanism swings, the clamping hole moves and the limiting groove is separated from the swing mechanism, so that the main box shift fork shaft can be axially moved to realize gear shifting, and the control and usage method are simple.

[0034] For the swing-type interlock device of the gearbox of the present invention, the main box shift fork shaft is clamped with the swing mechanism through the limiting groove in the clamping hole by the swing mechanism abutting against the locking groove of the countershaft shift fork shaft, so as to restrict the axial movement of the main box shift fork shaft; when the countershaft shift fork shaft axially moves to the gear shifting position, the swing mechanism abuts against the side wall on one side of the locking groove of the countershaft shift fork shaft, and the swing of the swing mechanism separates the limiting groove from the swing mechanism to enable the axial movement of the main box shift fork shaft. Description of the Drawings

[0035] Figure 1 : Structural schematic diagram of the swing-type interlock device of the gearbox;

[0036] Figure 2 : Top view structural schematic diagram of the swing-type interlock device of the gearbox;

[0037] Figure 3 : Left view structural schematic diagram of the swing-type interlock device of the gearbox;

[0038] Figure 4 : Structural schematic diagram of the limiting groove on the main box shift fork shaft;

[0039] Figure 5 : Structural schematic diagram of the state where the main box shift fork shaft is clamped with the swing mechanism;

[0040] Wherein: 1 - swing mechanism; 11 - swing arm; 111 - clamping hole; 112 - convex post; 12 - pin shaft; 2 - auxiliary box shift fork shaft; 21 - locking groove; 3 - main box shift fork shaft; 31 - limiting groove; 4 - elastic mechanism; 41 - spring. Specific embodiments

[0041] Embodiments of the present invention will be described in detail below. The same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and the drawings are not drawn to scale. They are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] A multi-speed manual transmission generally consists of a main box and an auxiliary box. If the auxiliary box is not engaged properly and the main box starts to shift gears, then the auxiliary box synchronizer has to bear not only the rotational inertia of the input end of the auxiliary box but also the rotational inertia of the input end of the main box, exceeding the load of the auxiliary box synchronizer, resulting in a long shift time and wear of the synchronizer. Moreover, as the integration degree of the transmission is getting higher and higher and the internal horizontal space is limited, an interlock device that can be installed in a narrow horizontal space is needed.

[0046] The gearbox swing interlocking device disclosed by the present invention uses the locking groove 21 on the auxiliary box fork shaft 2 as the state of not being in gear. The swing mechanism 1 abuts against the auxiliary box fork shaft 2 through the elastic mechanism 4, and slides relatively with the auxiliary box fork shaft 2 when moving. When the swing mechanism 1 abuts against the locking groove 21, the limit groove 31 engages the swing mechanism 1 to limit the axial movement of the main box fork shaft 3 to engage in gear. When the auxiliary box fork shaft 2 moves axially to engage in gear, the swing mechanism 1 swings and abuts against the auxiliary box fork shaft 2 on one side of the locking groove 21. When the limit groove 31 is separated from the swing mechanism 1, the main box fork shaft 3 can move axially in the clamping hole 111 to engage in gear, thereby avoiding the wear of the synchronizer caused by the main box engaging in gear when the auxiliary box is not in gear.

[0047] A gearbox swing interlocking device, specifically, Figures 1-5 As shown, it includes a swing mechanism 1, a secondary box fork shaft 2, an elastic mechanism 4 and a main box fork shaft 3. The swing mechanism 1 can swing back and forth around one end (the bottom end shown in the figure). A clamping hole 111 is penetrated on the swing mechanism 1. The clamping hole 111 is located inside the swing mechanism 1 so that its hole wall is completely located on the swing mechanism 1; an open locking groove 21 is provided on the peripheral side of the secondary box fork shaft 2, and one side (the right side shown in the figure) of the secondary box fork shaft 2 provided with the locking groove 21 axially slides against the swing structure. When the secondary box fork shaft 2 moves axially due to the open locking groove 21, the swing mechanism 1 abuts against the bottom of the locking groove 21 and gradually slides through the open groove wall to abut against the outer peripheral side wall of the secondary box fork shaft 2; the elastic mechanism 4 It is arranged at the other end of the swing mechanism 1, and is used to push the swing mechanism 1 to abut against the auxiliary box fork shaft 2; the main box fork shaft 3 is penetrated in the clamping hole 111, and the main box fork shaft 3 is provided with a limiting groove 31 corresponding to the clamping hole 111 in the unengaged state, and the length of the limiting groove 31 is greater than the thickness of the swing mechanism 1 at the clamping hole 111, so that the swing mechanism 1 can be located in the limiting groove 31 after swinging; when the swing mechanism 1 abuts against the locking groove 21 of the auxiliary box fork shaft 2, the limiting groove 31 clamps the swing mechanism 1, and when the swing mechanism 1 abuts against the side wall of the auxiliary box fork shaft 2 on one side of the locking groove 21, the limiting groove 31 is separated from the swing mechanism 1, so that the main box fork shaft 3 can slide axially in the clamping hole 111.

[0048] like Figure 1 and Figure 5 As shown, when the swing mechanism 1 abuts the locking groove 21, the swing mechanism 1 is located on the peripheral side of the clamping hole 111 and is embedded in the limiting groove 31, and the auxiliary box fork shaft 2 moves axially, and the swing mechanism 1 gradually abuts against the bottom of the locking groove 21 through the side groove wall of the locking groove 21 to the outer peripheral side wall of the auxiliary box fork shaft 2 (axially located on one side of the locking groove 21). In this process, the swing of the swing mechanism 1 drives the clamping hole 111 to swing, so that the limiting groove 31 is separated from the swing mechanism 1 until it is completely located in the clamping hole 111, and the main box fork shaft 3 can slide axially.

[0049] In a preferred embodiment, the side wall and the bottom wall of the locking groove 21 are arc-connected, facilitating the relative sliding of the swing mechanism 1 in the locking groove 21 with the auxiliary box shift fork shaft 2 until it abuts against the outer peripheral side wall of the auxiliary box shift fork shaft 2 on one side in the axial direction within the locking groove 21. More preferably, the two sides of the swing mechanism 1 that abut against the auxiliary box shift fork shaft 2 and are located at both axial ends of the auxiliary box shift fork shaft 2 are arc-shaped chamfers, which is conducive to sliding from the bottom of the locking groove 21 to the side wall of the auxiliary box shift fork shaft 2 on one side of the locking groove 21.

[0050] In an embodiment, the main box shift fork shaft 3 includes multiple shift fork shafts to achieve more gear shifts. For example, Figures 1-2 as shown, it includes shift fork shaft a, shift fork shaft b, and shift fork shaft c arranged side by side. More shift fork shafts such as shift fork shaft d and shift fork shaft e can be added according to actual needs; limiting grooves 31 are provided on shift fork shaft a and shift fork shaft c; shift fork shaft b is located between shift fork shaft a and shift fork shaft c and can axially slide in the clamping hole 111. There are two situations for shift fork shaft b. One is that it is clamped with the swing mechanism 1 when the swing mechanism 1 abuts against the locking groove 21 and can axially slide when the swing mechanism 1 abuts against the side wall of the auxiliary box shift fork shaft 2 on one side of the locking groove 21. In this case, the limiting groove 31 is provided on shift fork shaft b, and its locking and releasing are the same as those of shift fork shaft a. The other is that shift fork shaft b can axially slide when the swing mechanism 1 abuts against the outer peripheral side wall of the auxiliary box shift fork shaft 2 or the locking groove 21. The multiple shift fork shafts are arranged side by side and can clamp the swing mechanism 1 through the limiting groove 31 in the same clamping hole 111 to achieve the locking and releasing of the multiple shift fork shafts. In addition, the main box shift fork shaft 3 is not limited to three, and more shift fork shafts can be provided to achieve more gears to adapt to different driving requirements.

[0051] Based on the fact that the main box shift fork shaft 3 includes multiple shift fork shafts, as Figure 5 shown, when the swing mechanism 1 abuts against the locking groove 21 of the auxiliary box shift fork shaft 2, the back sides of shift fork shaft a and shift fork shaft c are clamped with the swing mechanism 1 through the limiting groove 31; shift fork shaft b is in the second situation mentioned above. There is a gap between the hole wall of the clamping hole 111 of shift fork shaft b, and shift fork shaft b can axially slide in the clamping hole 111 when the swing mechanism 1 abuts against the locking groove 21 of the auxiliary box shift fork shaft 2 or the side wall of the locking groove 21 on one side in the axial direction. Shift fork shaft b can always axially slide in the clamping hole 111. Shift fork shaft b does not need to be clamped. When there is no limiting groove 31, the gap from the hole wall of the clamping hole 111 allows the swing mechanism 1 to have room to swing, which can be used as a reverse gear. When the vehicle is stationary during reverse driving, a synchronizer is not required, and there is no need to open a limiting groove 31 on shift fork shaft b, saving production processes. During actual use, when the swing mechanism 1 abuts against the locking groove 21, the upper left corner and / or the lower left corner of shift fork shaft a are clamped with the swing arm 11 through the limiting groove 31, and the upper right corner and / or the lower right corner of shift fork shaft c are clamped with the swing arm 11 through the limiting groove 31, prohibiting the axial movement of shift fork shaft a and shift fork shaft c to engage gears.

[0052] Based on the main box shift fork shaft 3 including multiple shift fork shafts, in another specific solution, a plurality of card holes 111 are provided on the swing mechanism 1, and the shift fork shafts to be locked correspond to the card holes 111 one by one. The shift fork shaft a and the shift fork shaft c are respectively arranged in different card holes 111; the shift fork shaft b can be arranged in a single card hole 111 alone, or can be located in the same card hole 111 as the shift fork shaft a or the shift fork shaft c; when the swing mechanism 1 abuts against the locking groove 21, the shift fork shaft a and the shift fork shaft c are clamped to the swing mechanism 1 through their respective limiting grooves 31, and when the swing mechanism 1 abuts against the side wall of the auxiliary box shift fork shaft 2 on one side of the locking groove 21 in the axial direction, they can both axially slide in the card holes 111 they pass through.

[0053] In some embodiments, the swing mechanism 1 is specifically described, such as Figures 1-3 As shown, the swing mechanism 1 includes a swing arm 11 and a pin shaft 12. One end of the swing arm 11 is hinged on the pin shaft 12 and can swing around the pin shaft 12, and is restricted from moving in the axial direction of the pin shaft 12 when installed in the transmission. A card hole 111 is provided on the swing arm 11. The structure of the swing mechanism 1 of the present invention is very simple. The swing is realized by the swing arm 11 hinged around the pin shaft 12 at one end. After the swing arm 11 is installed, it is axially limited in the axial direction of the pin shaft 12, which can avoid the main box shift fork shaft 3 forcibly axially moving to push the swing arm 11 to move when the auxiliary box shift fork shaft 2 fails to engage properly, resulting in damage to the interlock device.

[0054] Based on the swing mechanism 1 including a swing arm 11 and a pin shaft 12, the depth of the locking groove 21 is the swing range of the swing mechanism. When the swing range is small, the swing path of the swing arm 11 around the circumference of the card hole 11 is small, which is not convenient for embedding the limiting groove 31 to achieve locking. As Figure 1 As shown, one end of the swing arm 11 is a cam structure, making the whole an eccentric wheel structure; the pin shaft 12 is eccentrically arranged on the cam structure, and the swing arm 11 can be eccentrically rotated to abut against the auxiliary box shift fork shaft 2, and at the same time, the swing path of the card slot 111 is enlarged, which is easy to be clamped with the limiting groove 31.

[0055] Based on the swing mechanism 1 including a swing arm 11 and a pin shaft 12, as Figure 1 As shown, the pin shaft 12 is located between the card hole 111 and the auxiliary box shift fork shaft 2, and is used to enlarge the rotation path of the card hole 111 around the pin shaft 12, so that the limiting groove 31 can be fully clamped at the position of the swing arm 11 where the card hole 111 is located, avoiding the situation that the swing path of the card hole 111 is too small, resulting in poor clamping of the limiting groove 31.

[0056] In a certain preferred embodiment, as Figure 1 As shown, the pin shaft 12 is located between the card hole 111 and the auxiliary box shift fork shaft 2, and is arranged on the side of the bottom end of the swing arm 11 away from the card hole 111, so as to fully enlarge the rotation path of the card hole 111 around the pin shaft 12.

[0057] In a certain embodiment, as Figures 1-2As shown, the elastic mechanism 4 includes a spring 41. Using the spring 41 as the elastic mechanism 4 has a simple structure and relatively low production cost. More preferably, a convex post 112 is provided at the other end of the swing mechanism 1, and the spring 41 is sleeved on the convex post 112, and the spring 41 can be stably fixed through the convex post 112.

[0058] In a preferred embodiment, as Figure 4 shown, the limiting groove 31 has an annular structure. When grooving and installing the main box shift fork shaft 3, there is no need to check the installation angle of the main box shift fork shaft 3 in the circumferential direction, which can avoid the problem that the main box shift fork shaft 3 cannot be clamped to the swing mechanism 1 or is always clamped to the swing mechanism 1 due to the circumferential rotation difference after installation.

[0059] In a preferred embodiment, as Figure 5 shown, the clamping hole 111 has a rectangular structure, and the displacement of the hole wall changes greatly before and after swinging, which is easy to be embedded in the limiting groove 31; the cross-section of the main box shift fork shaft 3 at the position of the swing mechanism 1 has a rectangular structure with prominent circumferential angles, which is convenient for the limiting groove 31 to be fitted and clamped to the circumference of the clamping hole 111 on the swing mechanism 1.

[0060] In a preferred embodiment, as Figure 1 shown, the clamping hole 111 is preferably a rectangular clamping hole 111. Multiple shift fork shafts are located in the same clamping hole 111. The two sides of the rectangular clamping hole 111 are respectively used to clamp the shift fork shaft a and the shift fork shaft c. The shift fork shaft b is located between the shift fork shaft a and the shift fork shaft c. The rectangular clamping hole 111 has sufficient space for the axial sliding of the shift fork shaft b before and after following the swing of the swing mechanism 1. The rectangular clamping hole 111 has prominent corners, and its path is larger after swinging, which is easy for the swing mechanism 1 to be embedded in the limiting groove 31 to form a clamping connection; it avoids the problem that there is a gap between the hole wall of the circular clamping hole 111 and the limiting groove 31 after swinging, resulting in inability to clamp. The clamping hole 111 can also be selected with other structures, such as triangular, pentagonal and other structures that are easy to be clamped to the limiting groove 31, to realize the simultaneous clamping of multiple shift fork shafts.

[0061] The swing mechanism 1 of the present invention overcomes the problem that the existing locking structure has a large axial dimension through axial movement, resulting in a large structural volume, and realizes locking through rotational movement; the swing arm 11 of the swing structure 1 is a plate-like structure, which greatly reduces the axial dimension, is beneficial to the layout of parts in the horizontal space, and reduces the horizontal dimension; compared with the traditional locking mechanism of steel balls, grooves and spiral springs, it does not require processing complex deep holes, has a simple structure, a small size in the horizontal direction, drills the clamping hole 111 or uses a mold to reserve the position of the clamping hole 111 to form the swing arm 11, has a simple production process, low cost and convenient installation.

[0062] In an embodiment, as Figure 2As shown, the locking groove 21 divides the auxiliary box shift fork shaft 2 into a high gear section and a low gear section axially located on both sides of the locking groove 21, enabling the gearbox to have more gears to meet different driving requirements. The main box shift fork shaft 3 located on both sides of the limiting groove 31 can also be divided into a high gear section and a low gear section to obtain more gears.

[0063] During actual use, the swing-type interlock device of this gearbox is preferably installed in the auxiliary box. The bottom end of the swing arm 11 is hinged to the gearbox through a pin shaft 12 on the side close to the auxiliary box shift fork shaft 2, and is axially limited by the auxiliary box of the gearbox in the axial direction of the pin shaft 12. The top end of the swing arm 11 is sleeved with a spring 41 through a convex column 112. The other end of the spring 41 abuts against the gearbox to push the swing arm 11 to abut against the auxiliary box shift fork shaft 2. In the initial state of the auxiliary box shift fork shaft 2 (when the gear is not fully engaged), the swing arm 11 abuts against the inside of the locking groove 21 to make the swing arm 11 embed into the limiting groove 31 to limit the axial movement of the main box shift fork shaft 3 for gear engagement; after the auxiliary box shift fork shaft 2 axially moves for gear engagement, the swing arm 11 abuts against the outer peripheral side wall of the auxiliary box shift fork shaft 2. During this process, the swing arm 11 rotates around the pin shaft 12 and separates from the limiting groove 31, enabling the main box shift fork shaft 3 to axially slide in the locking hole 111.

[0064] On the other hand, the present invention also provides a method for using the swing-type interlock device of a gearbox. Using the swing-type interlock device of the gearbox provided by the present invention, the method includes:

[0065] S1. Under the thrust of the elastic mechanism 4 pushing the swing mechanism 1 to abut against the auxiliary box shift fork shaft 2, axially move the auxiliary box shift fork shaft 2 so that the swing mechanism 1 slides from abutting against the locking groove 21 to abutting against the side wall of the auxiliary box shift fork shaft 2 axially located on one side of the locking groove 21. In a specific solution, the swing arm 11 swings around the pin shaft 12 hinged at one end. The spring 41 is used to push the swing arm 11 at the other end of the swing arm 11 to abut against the auxiliary box shift fork shaft 2. By rotating the swing arm 11 around the pin shaft 12, the clamping and separation of the swing arm 11 and the limiting groove 31 are controlled. The swing of the swing arm 11 has almost no resistance, making the gear engagement smoother.

[0066] S2. When the swing mechanism 1 abuts against the locking groove 21, the main box shift fork shaft 3 restricts the axial movement of the main box shift fork shaft 3 for gear engagement by clamping the swing mechanism 1 in the locking hole 111 through the limiting groove 31.

[0067] S3. When the swing mechanism 1 abuts against the side wall (outer peripheral side wall) of the auxiliary box shift fork shaft 2 axially located on one side of the locking groove 21, axially move the main box shift fork shaft 3 to achieve gear engagement.

[0068] The usage method of the interlocking device provided by the present invention makes full use of the structural characteristics of the interlocking device provided by the present invention. By pushing the swing mechanism 1 with the elastic mechanism 4 to always abut against the auxiliary box shift fork shaft 2, axially moving the auxiliary box shift fork shaft 2 causes the locking groove 21 where the swing mechanism 1 abuts against the auxiliary box shift fork shaft 2 to gradually change to abut against the side wall (high gear section or low gear section) located on one side of the locking groove 21. During this process, when the swing mechanism 1 swings, the locking hole 111 moves and the limiting groove 31 is separated from the swing mechanism 1, and the main box shift fork shaft 3 can be axially moved to achieve gear shifting. The control and usage method are simple, the gear shifting is smooth, the auxiliary box shifting time is reduced, excessive wear of the synchronizer is avoided, the power interruption time is reduced, and the power performance and economy of the vehicle are improved.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A gearbox swing interlocking device, characterized in that: include, A swing mechanism (1), wherein the swing mechanism (1) can swing back and forth around one end, and a clamping hole (111) is provided on the swing mechanism (1); Auxiliary gearbox fork shaft (2), wherein an open locking groove (21) is provided on the auxiliary gearbox fork shaft (2), and an axially sliding abutting swinging structure is provided on one side of the locking groove (21); An elastic mechanism (4), the elastic mechanism (4) being arranged at the other end of the swing mechanism (1) and being used for pushing the swing mechanism (1) to abut against the auxiliary box shift fork shaft (2); A main case fork shaft (3) is inserted into a clamping hole (111), and a limiting groove (31) is provided on the main case fork shaft (3) corresponding to the clamping hole (111). When the swing mechanism (1) of the main case fork shaft (3) abuts against the locking groove (21), the limiting groove (31) engages with the swing mechanism (1); when the swing mechanism (1) abuts against a side wall of the auxiliary case fork shaft (2) located on one side of the locking groove (21), the limiting groove (31) is separated from the swing mechanism (1), so that the main case fork shaft (3) can slide axially in the clamping hole (111).

2. A gearbox swing interlocking device as claimed in claim 1, characterized in that: The main box fork shaft (3) comprises a fork shaft a, a fork shaft b and a fork shaft c arranged side by side, and the fork shaft a and the fork shaft c are provided with the limiting groove (31); the fork shaft b is located between the fork shaft a and the fork shaft c and can slide axially in the clamping hole (111).

3. A gearbox swing interlocking device as claimed in claim 2, characterized in that: When the swing mechanism (1) abuts against the locking groove (21) of the auxiliary box fork shaft (2), the back sides of the fork shaft a and the fork shaft c are clamped to the swing mechanism (1) through the limit groove (31); there is a gap between the fork shaft b and the hole wall of the clamping hole (111), and when the swing mechanism (1) abuts against the locking groove (21) of the auxiliary box fork shaft (2) or the side wall of the axial locking groove (21), it can slide axially in the clamping hole (111).

4. A gearbox swing interlocking device as claimed in claim 2, characterized in that: The swing mechanism (1) is provided with a plurality of clamping holes (111), and the fork shaft a and the fork shaft c are respectively provided in different clamping holes (111). When the swing mechanism (1) abuts against the locking groove (21), the fork shaft a and the fork shaft c clamp the swing mechanism (1) through their respective limit grooves (31); when the swing mechanism (1) abuts against the side wall of the auxiliary box fork shaft (2) located on one side of the locking groove (21) in the axial direction, both can slide axially in the clamping holes (111) through which they pass.

5. A gearbox swing interlocking device according to any one of claims 1 to 4, characterized in that: The swing mechanism (1) comprises a swing arm (11) and a pin shaft (12); one end of the swing arm (11) is hinged on the pin shaft (12) and can swing around the pin shaft (12); and when installed in a gearbox, movement is restricted in the axial direction of the pin shaft (12); and the clamping hole (111) is provided on the swing arm (11).

6. A gearbox swing interlocking device as claimed in claim 5, characterized in that: One end of the swing arm (11) is a cam so that the swing arm (11) presents an eccentric wheel structure; the pin shaft (12) is eccentrically arranged on the cam structure.

7. A gearbox swing interlocking device as claimed in claim 5, characterized in that: The pin shaft (12) is located between the clamping hole (111) and the auxiliary gearbox fork shaft (2) and is used to enlarge the rotation path of the clamping hole (111) around the pin shaft (12).

8. A gearbox swing interlocking device as claimed in claim 1, characterized in that: The elastic mechanism (4) comprises a spring (41); the other end of the swing mechanism (1) is provided with a convex column (112), and the spring (41) is sleeved on the convex column (112).

9. A gearbox swing interlocking device as claimed in claim 1, characterized in that: The limiting groove (31) is an annular structure; the clamping hole (111) is a rectangular structure; and the cross section of the main box fork shaft (3) is a rectangular structure.

10. A method for using a gearbox swing interlocking device, characterized in that: Using the gearbox swing interlocking device as described in any one of claims 1 to 9, the method comprises: Under the thrust of the elastic mechanism (4) pushing the swing mechanism (1) to abut against the auxiliary box fork shaft (2), the auxiliary box fork shaft (2) is axially moved, so that the swing mechanism (1) slides from abutting against the locking groove (21) to abutting against the side wall of the auxiliary box fork shaft (2) located on one side of the locking groove (21); When the swing mechanism (1) abuts against the locking groove (21), the main gearbox fork shaft (3) engages with the swing mechanism (1) in the clamping hole (111) through the limiting groove (31) to limit the axial movement of the main gearbox fork shaft (3) to engage the gear; When the swing mechanism (1) abuts against the side wall of the auxiliary box fork shaft (2) located on one side of the locking groove (21), the main box fork shaft (3) is axially moved to achieve gear shifting.

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