Interlocking structure of tractor operating mechanism and tractor

Abstract

The utility model relates to a tractor control mechanism interlock structure and tractor, wherein, a tractor control mechanism interlock structure, including crawl block assembly and deputy variable speed block assembly, the crawl block assembly includes crawl block shift fork axle and the crawl block shift fork fixedly connected in the crawl block shift fork axle, the deputy variable speed block assembly includes deputy variable speed block shift fork axle and the deputy variable speed block shift fork fixedly connected in the deputy variable speed block shift fork axle, the deputy variable speed block shift fork axle with the crawl block shift fork axle are coaxial sliding connection through the plug -in mechanism, and the plug -in mechanism includes the insertion hole, and the difference between the hole depth of insertion hole and gear shifting stroke is greater than 0, and is less than gear shifting stroke, and gear shifting stroke is deputy variable speed block gear shifting stroke or crawl block gear shifting stroke. The utility model can realize interlock on the basis of no increase spare part, and simple and reliable maintenance is designed, and the chassis weight and development cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, and in particular to an interlocking structure for a tractor control mechanism and a tractor. Background Technology

[0002] Currently, with the increasing variety of cash crops, agricultural production places higher demands on the operating speed range of tractors. As a multi-functional work platform, tractors must have multiple speeds to adapt to different working conditions; therefore, the market demand for tractors equipped with crawler gears is growing.

[0003] However, in conventional designs, increasing the transmission ratio of the drivetrain to add a creeper gear usually requires increasing the transmission ratio, which leads to a significant increase in the torque borne by the drivetrain after the creeper gear mechanism. To prevent the drivetrain from operating under overload in certain gears, existing technologies often require corresponding locking structures or the addition of limit baffles to restrict the use of certain gears. The introduction of this additional locking mechanism increases the size of the original operating structure, expands the space required for the overall drivetrain layout, and also increases the weight of the entire chassis. Utility Model Content

[0004] This utility model provides an interlocking structure for a tractor control mechanism and a tractor, which can achieve interlocking without adding any parts. The design and maintenance are simple and reliable, and the chassis weight and development cost are reduced.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides an interlock structure for a tractor control mechanism, including a creeper gear assembly and a secondary gear assembly. The creeper gear assembly includes a creeper gear shift fork shaft and a creeper gear shift fork fixedly connected to the creeper gear shift fork shaft. The secondary gear assembly includes a secondary gear shift fork shaft and a secondary gear shift fork fixedly connected to the secondary gear shift fork shaft. The secondary gear shift fork shaft and the creeper gear shift fork shaft are coaxially and slidably connected by a plug-in mechanism. The plug-in mechanism includes a plug hole, and the difference between the depth of the plug hole and the shift stroke is greater than 0 and less than the shift stroke. The shift stroke is the secondary gear shift stroke or the creeper gear shift stroke.

[0006] The beneficial effects of this utility model are: during gear shifting, the creeper gear shift fork shaft and the auxiliary gear shift fork shaft can slide relative to each other. After the gear shift is completed, the length of the sliding section of the insertion hole is less than the shift stroke, thus achieving interlocking. This achieves interlocking without adding any parts, making the design and maintenance simple and reliable, and reducing chassis weight and development costs.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the insertion hole is opened at the end of the crawler shift fork shaft, and the end of the secondary shift fork shaft is adapted to and slidably connected to the insertion hole of the crawler shift fork shaft; or, the insertion hole is opened at the end of the secondary shift fork shaft, and the end of the crawler shift fork shaft is adapted to and slidably connected to the insertion hole of the secondary shift fork shaft.

[0009] Furthermore, the difference between the depth of the socket and the shift stroke is greater than 2mm.

[0010] Furthermore, the creeper assembly also includes a creeper rocker arm, a creeper rocker arm shaft with one end fixedly connected to one end of the creeper rocker arm, and a creeper shift lever with one end fixedly connected to the other end of the creeper rocker arm shaft. The other end of the creeper shift lever is connected to the creeper shift fork.

[0011] Furthermore, the side wall of the crawler fork shaft has two crawler ball sockets spaced apart along its axial direction. The distance between the two crawler ball sockets is equal to the crawler shift stroke. The interlocking structure also includes a crawler interlocking assembly that is fixedly installed. The crawler interlocking assembly abuts against the side wall of the crawler fork shaft and can slide from one of the crawler ball sockets into the other crawler ball socket as the crawler fork shaft moves.

[0012] Furthermore, the crawler stop interlock assembly includes a crawler stop base that is fixedly installed, a crawler stop slide rod that is slidably connected to the crawler stop base at one end, a crawler stop ball head that is fixedly connected to the crawler stop slide rod, and a crawler stop spring that is sleeved on the crawler stop slide rod. The crawler stop ball head abuts against the side wall of the crawler stop fork shaft, and the two ends of the crawler stop spring abut against the crawler stop base and the crawler stop ball head, respectively.

[0013] Furthermore, the secondary gearbox assembly also includes a secondary gearbox rocker arm, a secondary gearbox rocker arm shaft fixedly connected to the secondary gearbox rocker arm, and a secondary gearbox lever with one end fixedly connected to the other end of the secondary gearbox rocker arm shaft. The other end of the secondary gearbox lever is connected to the secondary gearbox shift fork shaft.

[0014] Furthermore, the side wall of the secondary gear shift fork shaft has two secondary gear ball sockets spaced apart along its axial direction. The distance between the two secondary gear ball sockets is equal to the secondary gear shift stroke. The interlocking structure also includes a fixedly installed secondary gear interlocking assembly. The secondary gear interlocking assembly abuts against the side wall of the secondary gear shift fork shaft and can slide from one of the secondary gear ball sockets into the other secondary gear ball socket as the secondary gear shift fork shaft moves.

[0015] Furthermore, the secondary gear shift interlock assembly includes a fixedly installed secondary gear shift base, a secondary gear shift slide rod with one end slidably connected to the secondary gear shift base, a secondary gear shift ball joint fixedly connected to the secondary gear shift slide rod, and a secondary gear shift spring sleeved on the secondary gear shift slide rod. The secondary gear shift ball joint abuts against the side wall of the secondary gear shift fork shaft, and the two ends of the secondary gear shift spring abut against the secondary gear shift base and the secondary gear shift ball joint, respectively.

[0016] This utility model also provides a tractor, including the aforementioned tractor control mechanism interlock structure. Attached Figure Description

[0017] Figure 1 This is a partial structural isometric view of the interlock structure of the tractor control mechanism of this utility model; Figure 2 This is a front view of the interlock structure of the tractor control mechanism of this utility model. The auxiliary gear shift fork shaft is shown in a partial cross-sectional view. Figure 3 for Figure 2 Enlarged view of the first partial structure; Figure 4 for Figure 2 Enlarged view of the second local structure; Figure 5 for Figure 2 The third enlarged view of the local structure.

[0018] The attached diagram lists the components represented by each number as follows: 1. Creeper gear assembly; 11. Creeper gear shift fork shaft; 111. Creeper gear ball socket; 12. Creeper gear shift fork; 13. Creeper gear rocker arm; 14. Creeper gear rocker arm shaft; 15. Creeper gear lever; 2. Secondary gearbox assembly; 21. Secondary gearbox shift fork shaft; 211. Secondary gearbox ball joint; 22. Secondary gearbox shift fork; 23. Secondary gearbox rocker arm; 24. Secondary gearbox rocker arm shaft; 25. Secondary gearbox lever; 3. Socket; 4. Creeper interlock assembly; 41. Creeper base; 42. Creeper slide bar; 43. Creeper ball head; 44. Creeper spring; 5. Secondary gearbox interlock assembly; 51. Secondary gearbox base; 52. Secondary gearbox slide bar; 53. Secondary gearbox ball joint; 54. Secondary gearbox spring; 6. Power input assembly. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] Example 1 like Figures 1-5 This utility model provides an interlock structure for a tractor control mechanism, including a creeper gear assembly 1 and a secondary gear assembly 2. The creeper gear assembly 1 includes a creeper gear shift fork shaft 11 and a creeper gear shift fork 12 fixedly connected to the creeper gear shift fork shaft 11. The secondary gear assembly 2 includes a secondary gear shift fork shaft 21 and a secondary gear shift fork 22 fixedly connected to the secondary gear shift fork shaft 21. The secondary gear shift fork shaft 21 and the creeper gear shift fork shaft 11 are coaxially and slidably connected by a plug-in mechanism. The plug-in mechanism includes a plug hole 3, and the difference between the hole depth of the plug hole 3 and the shift stroke is greater than 0 and less than the shift stroke. The shift stroke is the secondary gear shift stroke or the creeper gear shift stroke.

[0021] The beneficial effects of this embodiment are: during gear shifting, the creeper gear shift fork shaft 11 and the auxiliary gear shift fork shaft 21 can slide relative to each other. After the gear shift is completed, the length of the sliding section of the insertion hole 3 is less than the shift stroke, thus achieving interlocking. This achieves interlocking without adding any parts, making the design and maintenance simple and reliable, and reducing chassis weight and development costs.

[0022] Specifically, when engaging the crawler gear, the crawler gear shift fork shaft 11 slides relative to the auxiliary gear shift fork shaft 21 for a distance equal to one shift stroke. The crawler gear shift fork 12 completes the shift. After the shift, the length of the sliding section of the socket 3 is less than the shift stroke of the auxiliary gear, thus interlocking. Correspondingly, when engaging the high gear of the auxiliary gear, the auxiliary gear shift fork shaft 21 slides relative to the crawler gear shift fork shaft 11 for a distance equal to one shift stroke. The auxiliary gear shift fork 22 completes the shift. After the shift, the length of the sliding section of the socket 3 is less than the shift stroke of the crawler gear, thus interlocking. The difference between the depth of the socket 3 and the shift stroke is greater than 0, ensuring that the crawler gear shift fork shaft 11 and the auxiliary gear shift fork shaft 21 can slide relative to each other, achieving the shift stroke distance and enabling smooth shifting.

[0023] Specifically, the shift travel of both the secondary gear and the crawler gear can be 10mm.

[0024] Example 2 like Figure 1 and Figure 2 Based on embodiment 1, the insertion hole 3 is opened at the end of the crawler shift fork shaft 11, and the end of the auxiliary shift fork shaft 21 is adapted to and slidably connected to the insertion hole 3 of the crawler shift fork shaft 11; or, the insertion hole 3 is opened at the end of the auxiliary shift fork shaft 21, and the end of the crawler shift fork shaft 11 is adapted to and slidably connected to the insertion hole 3 of the auxiliary shift fork shaft 21.

[0025] The beneficial effect of adopting the preferred solution in the above embodiments is that, during gear shifting, the creeper gear shift fork shaft 11 or the auxiliary gear shift fork shaft 21 slides in the corresponding insertion hole 3 to achieve mutual sliding between the creeper gear shift fork shaft 11 and the auxiliary gear shift fork shaft 21. After sliding to the position, that is, after the creeper gear or auxiliary gear is engaged, an interlock is formed between the creeper gear shift fork shaft 11 and the auxiliary gear shift fork shaft 21, and the corresponding auxiliary gear or creeper gear cannot be engaged.

[0026] In the figure, the socket 3 is shown as being located at the end of the auxiliary shift fork shaft 21.

[0027] Example 3 like Figure 2 and Figure 4 Based on embodiments 1 and 2, the difference between the hole depth of the insertion hole 3 and the shift stroke is greater than 2mm. This is to take into account the machining and assembly accuracy of the parts and ensure that a reserve gap of at least 2mm is provided to allow for normal shifting.

[0028] The beneficial effect of adopting the preferred solution in the above embodiments is that if the gap is too small, the creep gear and the secondary high gear will not be able to be in the center position during assembly and use. If the working gap is relatively large, the creep gear and the secondary high gear will not be able to interlock. Therefore, the difference between the hole depth of the socket 3 and the shift stroke is less than the shift stroke.

[0029] Specifically, when both the secondary gear shifting stroke and the creeping gear shifting stroke can be 10mm, the difference between the hole depth of the socket 3 and the shifting stroke can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or 9mm, etc.

[0030] Example 4 like Figures 1-3 Based on embodiments 1-3, the crawler gear assembly 1 further includes a crawler gear rocker arm 13, a crawler gear rocker arm shaft 14 with one end fixedly connected to one end of the crawler gear rocker arm 13, and a crawler gear lever 15 with one end fixedly connected to the other end of the crawler gear rocker arm shaft 14. The other end of the crawler gear lever 15 is connected to the crawler gear fork 12.

[0031] The beneficial effect of adopting the preferred solution in the above embodiments is that when engaging the crawler gear, the pull cable or pull rod pulls the other end of the crawler gear rocker arm 13, the crawler gear rocker arm shaft 14 rotates, driving the crawler gear lever 15 to rotate synchronously, so that the crawler gear shift fork 12 and the crawler gear shift fork shaft 11 swing synchronously, as shown in the figure, swinging backward until the crawler gear shift fork 12 is engaged in the gear. At this time, the crawler gear shift fork shaft 11 and the auxiliary gear shift fork shaft 21 are on the same axis and the axial distance is only the reserved working clearance, that is, the difference between the hole depth of the insertion hole 3 and the shift stroke cannot meet the auxiliary gear shift stroke, such as 10mm, thus achieving interlocking.

[0032] Based on the above embodiments, the creeper rocker arm 13 and the creeper rocker arm shaft 14, and the creeper rocker arm shaft 14 and the creeper shift lever 15 can be connected by elastic pins.

[0033] Example 5 like Figures 1-3 Based on embodiments 1-4, the side wall of the crawler fork shaft 11 has two crawler ball sockets 111 spaced apart along its axial direction. The distance between the two crawler ball sockets 111 is equal to the crawler shift stroke. The interlocking structure also includes a crawler interlocking assembly 4 that is fixedly installed. The crawler interlocking assembly 4 abuts against the side wall of the crawler fork shaft 11 and can slide from one crawler ball socket 111 into the other crawler ball socket 111 as the crawler fork shaft 11 moves.

[0034] The beneficial effect of adopting the preferred solution in the above embodiments is that when the creep gear is engaged, the creep gear shift fork shaft 11 slides relative to the auxiliary gear shift fork shaft 21, and the fixedly installed creep gear interlock assembly 4 slides from one creep gear ball socket 111 into the other creep gear ball socket 111 and is always pressed against the creep gear shift fork shaft 11 to ensure that the creep gear assembly 1 is engaged in the correct gear position.

[0035] The distance between the two creeper ball sockets 111 is equal to the creeper shift stroke, which can be 10mm.

[0036] Based on the above embodiments, the two crawling stop ball sockets 111 can specifically be an arc-shaped groove structure or an annular groove structure surrounding the crawling stop fork shaft 11.

[0037] Example 6 like Figures 1-3 Based on embodiments 1-5, the crawler stop interlock assembly 4 includes a crawler stop base 41 fixedly installed, a crawler stop slide rod 42 slidably connected to the crawler stop base 41 at one end, a crawler stop ball head 43 fixedly connected to the crawler stop slide rod 42, and a crawler stop spring 44 sleeved on the crawler stop slide rod 42. The crawler stop ball head 43 abuts against the side wall of the crawler stop shift fork shaft 11, and the two ends of the crawler stop spring 44 abut against the crawler stop base 41 and the crawler stop ball head 43 respectively.

[0038] The beneficial effect of adopting the preferred solution in the above embodiments is that when the crawler gear is engaged, the crawler gear ball head 43 slides relative to the moving crawler gear shift fork shaft 11 and always abuts against the side wall of the crawler gear shift fork shaft 11, and the crawler gear slide rod 42 slides relative to the crawler gear base 41, the crawler gear spring 44 undergoes adaptive contraction, and when the crawler gear ball head 43 slides from one crawler gear ball socket 111 into another crawler gear ball socket 111, the gear shift is in place.

[0039] As is well known to those skilled in the art, the creeper base 41 is fixed to the rear axle housing of the tractor.

[0040] Example 7 like Figure 1 , Figure 2 as well as Figure 5 Based on embodiments 1-6, the secondary gearbox assembly 2 further includes a secondary gearbox rocker arm 23, a secondary gearbox rocker arm shaft 24 fixedly connected to the secondary gearbox rocker arm 23, and a secondary gearbox lever 25 fixedly connected at one end to the other end of the secondary gearbox rocker arm shaft 24. The other end of the secondary gearbox lever 25 is connected to the secondary gearbox shift fork shaft 21.

[0041] The beneficial effect of adopting the preferred solution in the above embodiments is that when engaging the high gear of the secondary transmission, the pull cable or pull rod pulls the other end of the secondary transmission rocker arm 23, the secondary transmission rocker arm shaft 24 rotates, and drives the secondary transmission shift lever 25 to rotate synchronously, so that the creeper shift fork shaft 11 and the creeper shift fork 12 swing synchronously, as shown in the figure, until the secondary transmission shift fork 22 is engaged. At this time, the creeper shift fork shaft 11 and the secondary transmission shift fork shaft 21 are on the same axis and the axial distance is only the reserved working clearance, that is, the difference between the hole depth of the insertion hole 3 and the shift stroke, which cannot meet the shift stroke of the secondary transmission, such as 10mm, thus achieving interlocking.

[0042] Based on the above embodiments, the auxiliary gear shift rocker arm 23 and the auxiliary gear shift rocker arm shaft 24, and the auxiliary gear shift rocker arm shaft 24 and the auxiliary gear shift lever 25 can be connected by elastic pins.

[0043] Example 8 like Figure 1 , Figure 2 as well as Figure 5 Based on embodiments 1-7, the side wall of the auxiliary gear shift fork shaft 21 has two auxiliary gear ball sockets 211 spaced apart along its axial direction. The distance between the two auxiliary gear ball sockets 211 is equal to the auxiliary gear shift stroke. The interlocking structure also includes a fixedly installed auxiliary gear interlocking assembly 5. The auxiliary gear interlocking assembly 5 abuts against the side wall of the auxiliary gear shift fork shaft 21 and can slide from one auxiliary gear ball socket 211 into the other auxiliary gear ball socket 211 as the auxiliary gear shift fork shaft 21 moves.

[0044] The beneficial effect of adopting the preferred solution in the above embodiments is that when engaging the high gear of the secondary transmission, the secondary transmission shift fork shaft 21 slides relative to the creeper shift fork shaft 11, and the fixedly installed secondary transmission interlock assembly 5 slides from one secondary transmission ball socket 211 into the other secondary transmission ball socket 211, and is always pressed against the secondary transmission shift fork shaft 21, so as to ensure that the secondary transmission assembly 2 is engaged in the correct gear.

[0045] The distance between the two auxiliary gear shift sockets 211 is equal to the shift stroke of the crawler gear, which can be 10mm.

[0046] Based on the above embodiments, the two auxiliary shift ball sockets 211 can specifically be arc-shaped groove structures or annular groove structures surrounding the auxiliary shift fork shaft 21.

[0047] Example 9 like Figure 1 and Figure 2 Based on embodiments 1-8, the secondary gearbox interlock assembly 5 includes a fixedly installed secondary gearbox base 51, a secondary gearbox slide rod 52 slidably connected to the secondary gearbox base 51 at one end, a secondary gearbox ball joint 53 fixedly connected to the secondary gearbox slide rod 52, and a secondary gearbox spring 54 sleeved on the secondary gearbox slide rod 52. The secondary gearbox ball joint 53 abuts against the side wall of the secondary gearbox shift fork shaft 21, and the two ends of the secondary gearbox spring 54 abut against the secondary gearbox base 51 and the secondary gearbox ball joint 53, respectively.

[0048] The beneficial effect of adopting the preferred solution in the above embodiments is that when engaging the high gear of the secondary transmission, the secondary transmission ball joint 53 slides relative to the moving secondary transmission shift fork shaft 21 and always abuts against the side wall of the secondary transmission shift fork shaft 21, and the secondary transmission slide rod 52 slides relative to the secondary transmission base 51. The secondary transmission spring 54 undergoes adaptive contraction. When the secondary transmission ball joint 53 slides from one secondary transmission ball socket 211 into another secondary transmission ball socket 211, the gear shift is completed.

[0049] As is well known to those skilled in the art, the auxiliary gearbox base 51 is fixed to the rear axle housing of the tractor.

[0050] Example 10 like Figures 1-5 The present invention also provides a tractor, including an interlocking structure for the tractor control mechanism as described in embodiments 1-9, and a power input assembly 6, which is provided with multiple gears, different gears cooperating with the creeper shift fork 12 to achieve gear engagement.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An interlock structure for a tractor control mechanism, characterized in that, The system includes a creeper gear assembly (1) and a secondary gear assembly (2). The creeper gear assembly (1) includes a creeper gear shift fork shaft (11) and a creeper gear shift fork (12) fixedly connected to the creeper gear shift fork shaft (11). The secondary gear assembly (2) includes a secondary gear shift fork shaft (21) and a secondary gear shift fork (22) fixedly connected to the secondary gear shift fork shaft (21). The secondary gear shift fork shaft (21) and the creeper gear shift fork shaft (11) are coaxially slidably connected by a plug-in mechanism. The plug-in mechanism includes a plug hole (3), and the difference between the hole depth of the plug hole (3) and the shift stroke is greater than 0 and less than the shift stroke. The shift stroke is the secondary gear shift stroke or the creeper gear shift stroke.

2. The tractor control mechanism interlock structure according to claim 1, characterized in that, The insertion hole (3) is opened at the end of the creeper shift fork shaft (11), and the end of the auxiliary shift fork shaft (21) is adapted to and slidably connected to the insertion hole (3) of the creeper shift fork shaft (11); or, the insertion hole (3) is opened at the end of the auxiliary shift fork shaft (21), and the end of the creeper shift fork shaft (11) is adapted to and slidably connected to the insertion hole (3) of the auxiliary shift fork shaft (21).

3. The tractor control mechanism interlock structure according to claim 1, characterized in that, The difference between the hole depth and the shift stroke of the socket (3) is greater than 2 mm.

4. The tractor control mechanism interlock structure according to claim 1, characterized in that, The creeper gear assembly (1) further includes a creeper gear rocker arm (13), a creeper gear rocker arm shaft (14) with one end fixedly connected to one end of the creeper gear rocker arm (13), and a creeper gear lever (15) with one end fixedly connected to the other end of the creeper gear rocker arm shaft (14). The other end of the creeper gear lever (15) is connected to the creeper gear fork (12).

5. The tractor control mechanism interlock structure according to claim 1, characterized in that, The side wall of the crawler fork shaft (11) has two crawler ball sockets (111) spaced apart along its axial direction. The distance between the two crawler ball sockets (111) is equal to the crawler shift stroke. The interlocking structure also includes a crawler interlocking assembly (4) that is fixedly installed. The crawler interlocking assembly (4) abuts against the side wall of the crawler fork shaft (11) and can slide from one of the crawler ball sockets (111) into the other crawler ball socket (111) as the crawler fork shaft (11) moves.

6. The tractor control mechanism interlock structure according to claim 5, characterized in that, The crawler stop interlock assembly (4) includes a crawler stop base (41) that is fixedly installed, a crawler stop slide rod (42) that is slidably connected to the crawler stop base (41) at one end, a crawler stop ball head (43) that is fixedly connected to the crawler stop slide rod (42), and a crawler stop spring (44) that is sleeved on the crawler stop slide rod (42). The crawler stop ball head (43) abuts against the side wall of the crawler stop shift fork shaft (11), and the two ends of the crawler stop spring (44) abut against the crawler stop base (41) and the crawler stop ball head (43) respectively.

7. The tractor control mechanism interlock structure according to claim 1, characterized in that, The secondary gearbox assembly (2) further includes a secondary gearbox rocker arm (23), a secondary gearbox rocker arm shaft (24) fixedly connected to the secondary gearbox rocker arm (23), and a secondary gearbox lever (25) fixedly connected at one end to the other end of the secondary gearbox rocker arm shaft (24). The other end of the secondary gearbox lever (25) is connected to the secondary gearbox shift fork shaft (21).

8. The tractor control mechanism interlock structure according to any one of claims 1-7, characterized in that, The side wall of the auxiliary gear shift fork shaft (21) has two auxiliary gear ball sockets (211) spaced apart along its axial direction. The distance between the two auxiliary gear ball sockets (211) is equal to the auxiliary gear shift stroke. The interlocking structure also includes a fixedly installed auxiliary gear interlocking assembly (5). The auxiliary gear interlocking assembly (5) abuts against the side wall of the auxiliary gear shift fork shaft (21) and can slide from one of the auxiliary gear ball sockets (211) into the other auxiliary gear ball socket (211) as the auxiliary gear shift fork shaft (21) moves.

9. The tractor control mechanism interlock structure according to claim 8, characterized in that, The secondary gear interlock assembly (5) includes a fixedly installed secondary gear base (51), a secondary gear slide rod (52) slidably connected to the secondary gear base (51) at one end, a secondary gear ball joint (53) fixedly connected to the secondary gear slide rod (52), and a secondary gear spring (54) sleeved on the secondary gear slide rod (52). The secondary gear ball joint (53) abuts against the side wall of the secondary gear shift fork shaft (21), and the two ends of the secondary gear spring (54) abut against the secondary gear base (51) and the secondary gear ball joint (53) respectively.

10. A tractor, characterized in that, Including the tractor control mechanism interlock structure as described in any one of claims 1-9.

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