A gearbox cylinder integrated self-locking interlocking structure

Abstract

The present application relates to a transmission cylinder integrated self-locking interlocking structure, which belongs to the technical field of commercial vehicle transmissions. It includes: a half-gear shift mechanism, which includes a shift operating shaft slidably connected to the transmission housing, and a shift fork fixedly connected to the shift operating shaft; a climbing gear shift mechanism, which includes a climbing gear operating shaft slidably connected to the transmission housing, and a climbing gear cylinder that drives the climbing gear operating shaft to slide back and forth; a shift interlocking mechanism, which includes an interlocking pin slidably connected to the climbing gear cylinder, and the interlocking pin is used to lock the shift fork or the climbing gear operating shaft. In the present application, when the half-gear shift mechanism is engaged in low gear or high gear, the shift fork drives the interlocking pin to lock the climbing gear operating shaft, thereby preventing the climbing gear shift mechanism from malfunctioning; when the climbing gear shift mechanism is engaged in climbing gear, the climbing gear operating shaft drives the interlocking pin to lock the shift fork, thereby preventing the half-gear shift mechanism from malfunctioning, thereby realizing mechanical interlocking between the half-gear shift mechanism and the climbing gear shift mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of commercial vehicle gearboxes, and in particular to a gearbox cylinder integrated self-locking interlocking structure. Background Art

[0002] An automobile transmission primarily consists of gears and shift shafts. Different gear combinations generate speed and torque changes, thereby changing the vehicle's direction and speed. To prevent damage to the transmission and drive mechanism caused by shifting into multiple gears simultaneously when changing speed and direction, an interlocking device is used in the transmission to lock the shift fork shafts of other gears, ensuring that only one gear is engaged at a time.

[0003] In related technology, crawler gears are primarily used for extremely low-speed operations and are generally only engaged when the transmission is in a low gear. Engaging crawler gears in high gear will not fully utilize the crawler gear's low-speed performance, and will wear the crawler gear gears, shortening the crawler gear's service life. Therefore, it is recommended that tractors not engage high gear simultaneously when engaging crawler gears.

[0004] However, transmissions with crawler gears usually do not have an interlocking mechanism between the crawler gear and the high-speed gear. Due to the different levels of operators or multiple operators, the crawler gear and the high-speed gear are often engaged simultaneously, resulting in mechanical gear shifting in the transmission, damaging the transmission mechanism and its service life. Summary of the Invention

[0005] An embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure to solve the problem in the related art that the transmission gear with a crawler gear usually does not have an interlocking mechanism for the crawler gear and the high-speed gear, resulting in mechanical random gearing of the transmission and damaging the transmission mechanism and its service life.

[0006] The embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure, comprising:

[0007] A half-gear shift mechanism, comprising a shift operating shaft slidably connected to the transmission housing, with a shift fork fixedly connected to the shift operating shaft;

[0008] A climbing gear shift mechanism, comprising a climbing gear operating shaft slidably connected to the transmission housing, and a climbing gear cylinder driving the climbing gear operating shaft to slide back and forth;

[0009] A shift interlocking mechanism includes an interlocking pin slidably connected to the climbing gear cylinder, and the interlocking pin is used to lock the shift fork or the climbing gear operating shaft.

[0010] In some embodiments: one end of the climbing gear operating shaft is provided with a first interlocking groove adapted to one end of the interlocking pin, and the shift fork is provided with a second interlocking groove adapted to the other end of the interlocking pin;

[0011] When one end of the interlocking pin is located in the first interlocking groove, the climbing gear operating shaft is locked from sliding and the shift fork is unlocked;

[0012] When the other end of the interlocking pin is located in the second interlocking groove, the shift fork is locked from moving and the climbing gear operating shaft is unlocked.

[0013] In some embodiments: the climbing gear cylinder includes a climbing gear cylinder body fixed in a transmission case, and a climbing gear piston is slidably connected in the climbing gear cylinder body;

[0014] One end of the climbing gear operating shaft is slidably connected to the climbing gear cylinder body and fixedly connected to the climbing gear piston;

[0015] A guide hole is provided on the climbing gear cylinder body, and the interlocking pin slides back and forth in the guide hole to lock the shift fork or the climbing gear operating shaft.

[0016] In some embodiments, the climbing gear cylinder body is connected to a climbing gear cylinder head that closes its opening, and the climbing gear cylinder head and the climbing gear cylinder body are connected to each other to form a closed cavity for accommodating the climbing gear piston;

[0017] The climbing gear operating shaft is coaxially connected to the climbing gear cylinder cover, the climbing gear piston and the climbing gear cylinder body in sequence;

[0018] A climbing gear shift fork is fixedly connected to the climbing gear operating shaft, and the climbing gear shift fork is located at an end away from the interlocking pin.

[0019] In some embodiments, the climbing gear piston divides the closed cavity into a left air chamber and a right air chamber, and the climbing gear cylinder body is connected to a first pipe joint connected to the left air chamber and a second pipe joint connected to the right air chamber;

[0020] The climbing gear cylinder cover and the climbing gear operating shaft are connected in a sliding and sealing manner via a first sealing ring, and the climbing gear cylinder body and the climbing gear operating shaft are connected in a sliding and sealing manner via a second sealing ring.

[0021] In some embodiments: the climbing gear cylinder is further provided with a first self-locking pin for self-locking the climbing gear operating shaft, and the side wall of the climbing gear operating shaft is provided with a first self-locking groove and a second self-locking groove respectively cooperating with the first self-locking pin.

[0022] In some embodiments: a mounting seat for accommodating the first self-locking pin is connected to the climbing gear cylinder, and a first pushing spring is provided in the mounting seat to push the first self-locking pin to slide toward the climbing gear operating shaft.

[0023] In some embodiments: one end of the shift operating shaft is connected to a shift cylinder that drives the shift operating shaft to slide back and forth in the transmission housing;

[0024] The other end of the shift operating shaft is provided with a second self-locking pin for self-locking the shift operating shaft, and the second self-locking pin is slidably connected to the transmission housing.

[0025] In some embodiments, a third self-locking groove and a fourth self-locking groove are provided on the side wall of the shift operating shaft, and are respectively engaged with the second self-locking pin;

[0026] The transmission case is provided with a self-locking hole for accommodating the second self-locking pin, and the self-locking hole is provided with a second push spring for pushing the second self-locking pin to slide toward the shift operating shaft.

[0027] In some embodiments, the shift control shaft and the crawling gear control shaft are parallel to each other in the transmission housing, and both extend along the length direction of the transmission housing.

[0028] The beneficial effects of the technical solution provided by this application include:

[0029] An embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure. Since the transmission cylinder integrated self-locking interlocking structure of the present application is provided with a half-gear shift mechanism, the half-gear shift mechanism includes a shift operating shaft slidably connected in the transmission housing, and a shift fork is fixedly connected to the shift operating shaft; a climbing gear shift mechanism, the climbing gear shift mechanism includes a climbing gear operating shaft slidably connected in the transmission housing, and a climbing gear cylinder driving the climbing gear operating shaft to slide back and forth, and a shift interlocking mechanism, the shift interlocking mechanism includes an interlocking pin slidably connected to the climbing gear cylinder, and the interlocking pin is used to lock the shift fork or the climbing gear operating shaft.

[0030] Therefore, the transmission cylinder integrated self-locking interlocking structure of the present application is provided with an interlocking shift interlocking mechanism in the half-gear shift mechanism and the climbing gear shift mechanism. The shift interlocking mechanism includes an interlocking pin slidably connected to the climbing gear cylinder, and the interlocking pin is used to lock the shift fork or the climbing gear operating shaft. When the half-gear shift mechanism is engaged in low gear or high gear, the shift fork drives the interlocking pin to lock the climbing gear operating shaft, placing the climbing gear shift mechanism in a neutral state, thereby preventing the climbing gear shift mechanism from malfunctioning. When the climbing gear shift mechanism is engaged in climbing gear, the climbing gear operating shaft drives the interlocking pin to lock the shift fork, placing the half-gear shift mechanism in a neutral state, thereby preventing the half-gear shift mechanism from malfunctioning.

[0031] Furthermore, the shift interlock mechanism used in this application to interlock the half-shift mechanism and the climbing gear shift mechanism is integrated into the climbing gear shift mechanism's climbing gear cylinder, resulting in a simple and compact structure. The shift interlock mechanism utilizes a purely mechanical interlock pin slidably connected to the climbing gear cylinder. This interlock pin securely and reliably locks the shift fork or climbing gear operating shaft, and offers ease of installation, convenient parts layout, space savings, reliable quality, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0034] Figure 2 This is a structural diagram of the climbing gear shift mechanism in an embodiment of the present application;

[0035] Figure 3 This is a structural diagram of the half-gear shift mechanism in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1. Gearbox housing; 2. Shift operating shaft; 2a. Third self-locking groove; 2b. Fourth self-locking groove; 3. Shift fork; 3a. Second interlocking groove; 4. Shift cylinder; 5. Second self-locking pin; 6. Second push spring; 7. Climbing gear operating shaft; 7a. First interlocking groove; 7b. First self-locking groove; 7c. Second self-locking groove; 8. Climbing gear cylinder; 8a. Guide hole; 9. Climbing gear cylinder body; 10. Climbing gear piston; 11. Climbing gear cylinder cover; 12. Climbing gear shift fork; 13. First pipe joint; 14. Second pipe joint; 15. First self-locking pin; 16. First push spring; 17. Interlocking pin. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] An embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure, which can solve the problem that a transmission with a crawler gear usually does not have an interlocking mechanism for the crawler gear and the high-speed gear, resulting in mechanical gear shifting in the transmission and damaging the transmission mechanism and its service life.

[0040] See also Figure 1 and Figure 3 As shown, the embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure, including:

[0041] A half-gear shift mechanism includes a shift operating shaft 2 slidably connected to a transmission housing 1, and a shift fork 3 fixedly connected to the shift operating shaft 2; the shift operating shaft 2 reciprocates in the transmission housing 1 to drive the shift fork 3 to drive the synchronizer to switch back and forth between low gear, neutral gear and high gear, thereby realizing high-speed gear shifting operation of the transmission.

[0042] The climbing gear shift mechanism includes a climbing gear operating shaft 7 slidably connected to the transmission housing 1 and a climbing gear cylinder 8 that drives the climbing gear operating shaft 7 back and forth. Driven by the climbing gear cylinder 8, the climbing gear operating shaft 7 reciprocates within the transmission housing 1, driving the climbing gear shift fork 12 to shift back and forth between neutral and climbing gear, thereby achieving the climbing gear shift operation of the transmission. The shift operating shaft 2 and the climbing gear operating shaft 7 are parallel to each other within the transmission housing 1 and both extend along the length of the transmission housing 1.

[0043] The shift interlock mechanism includes an interlock pin 17 slidably connected to the climbing gear cylinder 8. This interlock pin 17 is used to lock the shift fork 3 or the climbing gear operating shaft 7. When the half-gear shift mechanism is engaged in low or high gear, the shift fork 3 drives the interlock pin 17 to lock the climbing gear operating shaft 7, placing the climbing gear shift mechanism in neutral and preventing malfunction of the climbing gear shift mechanism. When the climbing gear shift mechanism is engaged in climbing gear, the climbing gear operating shaft 7 drives the interlock pin 17 to lock the shift fork 3, placing the half-gear shift mechanism in neutral and preventing malfunction of the half-gear shift mechanism.

[0044] The transmission cylinder integrated self-locking interlocking structure of the present embodiment incorporates an interlocking shift interlock mechanism between the half-gear shift mechanism and the climbing gear shift mechanism. This shift interlock mechanism includes an interlock pin 17 slidably connected to the climbing gear cylinder 8. This interlock pin 17 is used to lock the shift fork 3 or the climbing gear operating shaft 7. When the half-gear shift mechanism is engaged in low or high gear, the shift fork 3 actuates the interlock pin 17 to lock the climbing gear operating shaft 7, placing the climbing gear shift mechanism in neutral and thereby preventing malfunction of the climbing gear shift mechanism. When the climbing gear shift mechanism is engaged in climbing gear, the climbing gear operating shaft 7 actuates the interlock pin 17 to lock the shift fork 3, placing the half-gear shift mechanism in neutral and thereby preventing malfunction of the half-gear shift mechanism.

[0045] Furthermore, in the embodiment of the present application, the shift interlock mechanism that interlocks the half-gear shift mechanism and the climbing gear shift mechanism is integrated into the climbing gear cylinder 8 of the climbing gear shift mechanism, resulting in a simple and compact structure. The shift interlock mechanism utilizes a purely mechanical interlock pin 17 that is slidably connected to the climbing gear cylinder 8. This interlock pin 17 can safely and reliably lock the shift fork 3 or climbing gear operating shaft 7, and is easy to install, facilitates parts layout, saves space, is reliable, and is low in cost. In addition to the interlock pin 17 used in the present application to lock the shift fork 3 or climbing gear operating shaft 7, those skilled in the art can also use the interlock pin 17 to lock the climbing gear shift fork 12 or the shift operating shaft 2, or use the interlock pin 17 to lock the climbing gear shift fork 12 or the shift fork 3, or use the interlock pin 17 to lock the climbing gear operating shaft 7 or the shift operating shaft 2, thereby similarly achieving interlocking between the half-gear shift mechanism and the climbing gear shift mechanism.

[0046] In some alternative embodiments: See Figure 1 As shown, the embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure, in which a first interlocking groove 7a is provided on one end of the climbing gear operating shaft 7 of the transmission cylinder integrated self-locking interlocking structure, and a second interlocking groove 3a is provided on the shift fork 3, which is adapted to the other end of the interlocking pin 17. The structures of the first interlocking groove 7a and the second interlocking groove 3a can preferably be a ball-shaped interlocking groove, a "V"-shaped interlocking groove, or an isosceles trapezoidal interlocking groove, and the two ends of the interlocking pin 17 can preferably be a ball head shape adapted to the ball-shaped interlocking groove, a triangle shape adapted to the "V"-shaped interlocking groove, or an isosceles trapezoidal shape adapted to the isosceles trapezoidal interlocking groove.

[0047] When one end of the interlock pin 17 is located in the first interlock groove 7a, the climbing gear operating shaft 7 is locked from sliding and the shift fork 3 is unlocked. At this time, the shift operating shaft 2 can reciprocate within the transmission housing 1, driving the shift fork 3 to drive the synchronizer to switch back and forth between low gear, neutral gear, and high gear, thereby achieving high-speed gear shifting in the transmission. When the other end of the interlock pin 17 is located in the second interlock groove 3a, the shift fork 3 is locked from moving and the climbing gear operating shaft 7 is unlocked. At this time, the climbing gear operating shaft 7, driven by the climbing gear cylinder 8, reciprocates within the transmission housing 1, driving the climbing gear operating shaft 7 to switch back and forth between neutral gear and climbing gear, thereby achieving climbing gear shifting in the transmission.

[0048] In some alternative embodiments: See Figure 1As shown, an embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure. The climbing gear cylinder 8 of the transmission cylinder integrated self-locking interlocking structure includes a climbing gear cylinder body 9 fixed in the transmission housing 1, and a climbing gear piston 10 is slidably connected in the climbing gear cylinder body 9. One end of the climbing gear operating shaft 7 is slidably connected in the climbing gear cylinder body 9 and is fixedly connected to the climbing gear piston 10. A guide hole 8a is formed in the climbing gear cylinder body 9, and the center line of the guide hole 8a is perpendicular to the axis of the climbing gear operating shaft 7. The interlocking pin 17 slides back and forth in the guide hole 8a to lock the shift fork 3 or the climbing gear operating shaft 7.

[0049] The climbing gear cylinder body 9 is connected to a climbing gear cylinder head 11 that seals its opening. The climbing gear cylinder head 11 and the climbing gear cylinder body 9 are fixedly connected to each other to form a closed cavity that accommodates the climbing gear piston 10. The climbing gear piston 10 can reciprocate within the closed cavity formed by the fixed connection between the climbing gear cylinder head 11 and the climbing gear cylinder body 9. The climbing gear operating shaft 7 is coaxially connected to the climbing gear cylinder head 11, the climbing gear piston 10, and the climbing gear cylinder body 9 in sequence. The climbing gear cylinder head 11 and the climbing gear cylinder body 9 are slidably connected to the climbing gear operating shaft 7. The climbing gear piston 10 is fixedly connected to the climbing gear operating shaft 7. The reciprocating movement of the climbing gear piston 10 within the closed cavity drives the climbing gear operating shaft 7 to move synchronously.

[0050] A climbing gear shift fork 12 is fixedly connected to the climbing gear operating shaft 7, located at the end away from the interlocking pin 17. The climbing gear operating shaft 7 drives the climbing gear shift fork 12 to switch back and forth between neutral and climbing gear. The climbing gear piston 10 divides the enclosed cavity into a left air chamber and a right air chamber. The climbing gear cylinder body 9 is connected to a first pipe joint 13 connecting to the left air chamber and a second pipe joint 14 connecting to the right air chamber. The climbing gear cylinder head 11 and the climbing gear operating shaft 7 are connected in a sliding and sealing manner via a first sealing ring, and the climbing gear cylinder body 9 and the climbing gear operating shaft 7 are connected in a sliding and sealing manner via a second sealing ring.

[0051] When the climbing gear piston 10 engages a climbing gear, compressed air enters the right air chamber of the climbing gear cylinder 8 through the second pipe joint 14. The compressed air in the left air chamber of the climbing gear cylinder 8 is discharged through the first pipe joint 13. The climbing gear piston 10 drives the climbing gear operating shaft 7 and the climbing gear shift fork 12 to move leftward, thereby engaging the climbing gear. At the same time, the first interlocking groove 7a on the right side of the climbing gear operating shaft 7 moves leftward and becomes misaligned with the guide hole 8a, pushing the interlocking pin 17 into the second interlocking groove 3a of the shift fork 3, thereby locking the shift fork 3.

[0052] When the climbing gear piston 10 is in neutral, compressed air enters the left air chamber of the climbing gear cylinder 8 through the first pipe joint 13. The compressed air in the right air chamber of the climbing gear cylinder 8 is discharged through the second pipe joint 14. The climbing gear piston 10 drives the climbing gear operating shaft 7 and the climbing gear shift fork 12 to move rightward, achieving the climbing gear neutral position. At the same time, the first interlocking groove 7a on the right side of the climbing gear operating shaft 7 moves rightward and aligns with the guide hole 8a. The interlocking pin 17 can be pushed into the first interlocking groove 7a on the right side of the climbing gear operating shaft 7, releasing the lock of the shift fork 3.

[0053] In some alternative embodiments: See Figure 1 and Figure 2 As shown, the embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure. The climbing gear cylinder 8 of the transmission cylinder integrated self-locking interlocking structure is further provided with a first self-locking pin 15 for self-locking the climbing gear operating shaft 7. The sidewall of the climbing gear operating shaft 7 is provided with a first self-locking groove 7b and a second self-locking groove 7c that respectively cooperate with the first self-locking pin 15. The climbing gear cylinder 8 is connected to a mounting seat that accommodates the first self-locking pin 15. A first push spring 16 is provided within the mounting seat to push the first self-locking pin 15 to slide toward the climbing gear operating shaft 7.

[0054] When the climbing gear piston 10 engages a climbing gear, compressed air enters the right air chamber of the climbing gear cylinder 8 through the second pipe joint 14. The compressed air in the left air chamber of the climbing gear cylinder 8 is discharged through the first pipe joint 13. The climbing gear piston 10 then drives the climbing gear operating shaft 7 and the climbing gear shift fork 12 to move leftward, engaging the climbing gear. Simultaneously, the first interlocking groove 7a on the right side of the climbing gear operating shaft 7 shifts leftward, becoming misaligned with the guide hole 8a. This pushes the interlocking pin 17 into the second interlocking groove 3a of the shift fork 3, locking the shift fork 3. Simultaneously, the first push spring 16 pushes the ball at the front end of the first self-locking pin 15 into the first self-locking groove 7b of the climbing gear operating shaft 7, achieving self-locking of the climbing gear.

[0055] When the climbing gear piston 10 is in neutral, compressed air enters the left air chamber of the climbing gear cylinder 8 through the first pipe joint 13. The compressed air in the right air chamber of the climbing gear cylinder 8 is discharged through the second pipe joint 14. The climbing gear piston 10 drives the climbing gear operating shaft 7 and the climbing gear shift fork 12 to move rightward, achieving the climbing gear neutral position. Simultaneously, the first interlocking groove 7a on the right side of the climbing gear operating shaft 7 moves rightward and aligns with the guide hole 8a. The interlocking pin 17 can be pushed into the first interlocking groove 7a on the right side of the climbing gear operating shaft 7, releasing the lock of the shift fork 3. Simultaneously, the first push spring 16 pushes the ball at the front end of the first self-locking pin 15 into the second self-locking groove 7c of the climbing gear operating shaft 7, achieving the self-locking position in the climbing gear neutral position.

[0056] In some alternative embodiments: See Figure 3As shown, an embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure, wherein one end of the shift operating shaft 2 of the transmission cylinder integrated self-locking interlocking structure is connected to a shift cylinder 4 that drives the shift operating shaft 2 to slide back and forth within the transmission housing 1. The other end of the shift operating shaft 2 is provided with a second self-locking pin 5 that self-locks the shift operating shaft 2, and the second self-locking pin 5 is slidably connected to the transmission housing 1. A third self-locking groove 2a and a fourth self-locking groove 2b that respectively cooperate with the second self-locking pin 5 are provided on the side wall of the shift operating shaft 2. A self-locking hole for accommodating the second self-locking pin 5 is provided on the transmission housing 1, and a second push spring 6 is provided in the self-locking hole to push the second self-locking pin 5 to slide toward the shift operating shaft 2.

[0057] When the shift cylinder 4 engages an upshift, compressed air enters the left chamber of the shift cylinder 4, while the air in the right chamber is exhausted. This causes the piston of the shift cylinder 4 to move rightward, and the shift operating shaft 2 drives the shift fork 3 to move rightward, thus engaging the gear. Once the gear is engaged, the ball head at the front end of the second self-locking pin 5 enters the third self-locking groove 2a of the shift operating shaft 2, thus engaging the gear. When the shift cylinder 4 engages a downshift, compressed air enters the right chamber of the shift cylinder 4, while the air in the left chamber is exhausted. This causes the piston of the shift cylinder 4 to move leftward, and the shift operating shaft 2 drives the shift fork 3 to move leftward, thus engaging the gear. Once the gear is engaged, the ball head at the front end of the second self-locking pin 5 enters the fourth self-locking groove 2b of the shift operating shaft 2, thus engaging the gear.

[0058] How it works

[0059] An embodiment of the present application provides a transmission cylinder integrated self-locking interlocking structure. Since the transmission cylinder integrated self-locking interlocking structure of the present application is provided with a half-gear shifting mechanism, the half-gear shifting mechanism includes a shift operating shaft 2 slidably connected in the transmission housing 1, and a shift fork 3 is fixedly connected to the shift operating shaft 2; a climbing gear shifting mechanism, the climbing gear shifting mechanism includes a climbing gear operating shaft 7 slidably connected in the transmission housing 1, and a climbing gear cylinder 8 driving the climbing gear operating shaft 7 to slide back and forth, and a shift interlocking mechanism, the shift interlocking mechanism includes an interlocking pin 17 slidably connected to the climbing gear cylinder 8, and the interlocking pin 17 is used to lock the shift fork 3 or the climbing gear operating shaft 7.

[0060] Therefore, the transmission cylinder integrated self-locking interlocking structure of the present application is provided with an interlocking shift interlocking mechanism in the half-gear shift mechanism and the climbing gear shift mechanism. The shift interlocking mechanism includes an interlocking pin 17 slidably connected to the climbing gear cylinder 8. The interlocking pin 17 is used to lock the shift fork 3 or the climbing gear operating shaft 7. When the half-gear shift mechanism is engaged in low gear or high gear, the shift fork 3 drives the interlocking pin 17 to lock the climbing gear operating shaft 7, placing the climbing gear shift mechanism in a neutral state, thereby preventing the climbing gear shift mechanism from malfunctioning. When the climbing gear shift mechanism is engaged in climbing gear, the climbing gear operating shaft 7 drives the interlocking pin 17 to lock the shift fork 3, placing the half-gear shift mechanism in a neutral state, thereby preventing the half-gear shift mechanism from malfunctioning.

[0061] Furthermore, the shift interlock mechanism used in this application to interlock the half-shift mechanism and the climbing gear shift mechanism is integrated into the climbing gear cylinder 8 of the climbing gear shift mechanism, resulting in a simple and compact structure. The shift interlock mechanism utilizes a purely mechanical interlock pin 17 slidably connected to the climbing gear cylinder 8. This interlock pin safely and reliably locks the shift fork 3 or climbing gear operating shaft 7, and is easy to install, facilitates parts layout, saves space, is reliable, and has low cost.

[0062] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0064] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A gearbox cylinder integrated self-locking interlocking structure, characterized in that: include: A half-gear shift mechanism, comprising a shift operating shaft (2) slidably connected to a transmission housing (1), a shift fork (3) fixedly connected to the shift operating shaft (2); A climbing gear shift mechanism, the climbing gear shift mechanism comprising a climbing gear operating shaft (7) slidably connected in a transmission case (1), and a climbing gear cylinder (8) driving the climbing gear operating shaft (7) to slide back and forth; A shift interlocking mechanism, the shift interlocking mechanism comprising an interlocking pin (17) slidably connected to a climbing gear cylinder (8), the interlocking pin (17) being used to lock the shift fork (3) or the climbing gear operating shaft (7); One end of the climbing gear operating shaft (7) is provided with a first interlocking groove (7a) adapted to one end of the interlocking pin (17), and the shift fork (3) is provided with a second interlocking groove (3a) adapted to the other end of the interlocking pin (17); When one end of the interlocking pin (17) is located in the first interlocking groove (7a), the sliding of the climbing gear operating shaft (7) is locked and the shift fork (3) is unlocked; When the other end of the interlocking pin (17) is located in the second interlocking groove (3a), the shift fork (3) is locked from moving and the climbing gear operating shaft (7) is unlocked; One end of the shift operating shaft (2) is connected to a shift cylinder (4) that drives the shift operating shaft (2) to slide back and forth in the transmission housing (1); The other end of the shift operating shaft (2) is provided with a second self-locking pin (5) for self-locking the shift operating shaft (2), and the second self-locking pin (5) is slidably connected to the transmission housing (1); A third self-locking groove (2a) and a fourth self-locking groove (2b) respectively cooperating with the second self-locking pin (5) are provided on the side wall of the shift operating shaft (2). The gearbox housing (1) is provided with a self-locking hole for accommodating the second self-locking pin (5), and a second push spring (6) for pushing the second self-locking pin (5) to slide toward the gear shift operating shaft (2) is provided in the self-locking hole.

2. The gearbox cylinder integrated self-locking interlocking structure according to claim 1, characterized in that: The climbing gear cylinder (8) comprises a climbing gear cylinder body (9) fixed in the transmission housing (1), and a climbing gear piston (10) is slidably connected in the climbing gear cylinder body (9); One end of the climbing gear operating shaft (7) is slidably connected in the climbing gear cylinder body (9) and fixedly connected to the climbing gear piston (10); A guide hole (8a) is provided on the climbing gear cylinder body (9), and the interlocking pin (17) slides back and forth in the guide hole (8a) to lock the shift fork (3) or the climbing gear operating shaft (7).

3. The gearbox cylinder integrated self-locking interlocking structure according to claim 2, characterized in that: The climbing gear cylinder body (9) is connected to a climbing gear cylinder head (11) that closes its opening, and the climbing gear cylinder head (11) and the climbing gear cylinder body (9) are connected to each other to form a closed cavity that accommodates the climbing gear piston (10); The climbing gear operating shaft (7) is coaxially connected to the climbing gear cylinder cover (11), the climbing gear piston (10) and the climbing gear cylinder body (9) in sequence; A climbing gear shift fork (12) is fixedly connected to the climbing gear operating shaft (7), and the climbing gear shift fork (12) is located at an end away from the interlocking pin (17).

4. The gearbox cylinder integrated self-locking interlocking structure according to claim 3, characterized in that: The climbing gear piston (10) divides the closed cavity into a left air chamber and a right air chamber, and the climbing gear cylinder body (9) is connected to a first pipe joint (13) connected to the left air chamber and a second pipe joint (14) connected to the right air chamber; The climbing gear cylinder cover (11) and the climbing gear operating shaft (7) are connected in a sliding and sealing manner via a first sealing ring, and the climbing gear cylinder body (9) and the climbing gear operating shaft (7) are connected in a sliding and sealing manner via a second sealing ring.

5. A transmission cylinder integrated self-locking interlocking structure according to claim 1 or 2, characterized in that: The climbing gear cylinder (8) is further provided with a first self-locking pin (15) for self-locking the climbing gear operating shaft (7), and a first self-locking groove (7b) and a second self-locking groove (7c) respectively cooperating with the first self-locking pin (15) are provided on the side wall of the climbing gear operating shaft (7).

6. The transmission cylinder integrated self-locking interlocking structure according to claim 5, characterized in that: The climbing gear cylinder (8) is connected to a mounting seat for accommodating the first self-locking pin (15), and a first push spring (16) is provided in the mounting seat for pushing the first self-locking pin (15) to slide toward the climbing gear operating shaft (7).

7. The transmission cylinder integrated self-locking interlocking structure according to claim 1, characterized in that: The shift operating shaft (2) and the climbing gear operating shaft (7) are parallel to each other in the gearbox housing (1), and both extend along the length direction of the gearbox housing (1).

Images