Variable row spacing frame for crop harvester, welsh onion harvester and method

Abstract

The application discloses a variable ridge distance vehicle frame for a crop harvester, a green onion harvester and a method, and solves the problem of the complex ridge distance adjusting structure in the prior art, has the beneficial effects of realizing ridge distance adjustment of the vehicle frame structure and ensuring stable driving of the vehicle frame structure, and the specific scheme is as follows: a variable ridge distance vehicle frame for a crop harvester, comprising a vehicle frame body, the vehicle frame body supports a ridge distance adjusting mechanism, a first shaft supports a first walking mechanism, a second shaft is connected with a third shaft, the third shaft supports a second walking mechanism, the first shaft and the second shaft are connected with a gearbox respectively, the second shaft and the third shaft are connected through a thread structure, the ridge distance adjusting mechanism can drive the first shaft to move relative to the second shaft to adjust the distance between the first walking mechanism and the second walking mechanism, and the ridge distance adjusting mechanism comprises a rotating shaft which is rotatably installed on the vehicle frame body.

Description

Technical Field

[0001] This invention relates to the field of scallion harvester technology, and in particular to a variable ridge spacing frame for crop harvesters, a scallion harvester, and a method thereof. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] A scallion harvester is a modern agricultural machine primarily used for harvesting scallions. Its main structure includes a harvesting mechanism, a conveying mechanism, a cutting mechanism, and a collecting mechanism.

[0004] In the existing technology, the inventors found that existing scallion harvesters, including other types of crop harvesters, are generally large in size and cumbersome in operation. Some crop harvesters with simple structures cannot adjust the distance between the wheels according to the row spacing of scallions. When harvesting scallions under different row spacing conditions, it is easy to damage the scallions, which is not conducive to the harvesting work. Even if some machines can adjust the row spacing, they are either complex in structure or achieve the adjustment through a hydraulic cylinder structure, which is not a purely mechanical structure, and the overall stability is tested. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a variable ridge spacing frame for crop harvesters, which can freely and conveniently adjust the spacing between the two tracks.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A variable ridge spacing frame for a crop harvester includes a frame body supporting a ridge spacing adjustment mechanism. A first axle supports a first traveling mechanism, a second axle is connected to a third axle, and the third axle supports a second traveling mechanism. The first and second axles are respectively connected to a gearbox, and the second and third axles are connected by a threaded structure. The ridge spacing adjustment mechanism can drive the first axle to move relative to the second axle to adjust the distance between the first and second traveling mechanisms. The ridge spacing adjustment mechanism includes a rotating shaft rotatably mounted on the frame body. The first axle and the rotating shaft are arranged vertically, and the third axle is detachably connected to the frame body. The rotating shaft can drive the first axle to rotate, and the first axle drives the second axle to rotate relative to the third axle through the gearbox, thereby adjusting the distance between the first and second traveling mechanisms.

[0008] As described above, the variable ridge spacing frame supports the first and second traveling mechanisms. The frame also supports a rotating shaft, which rotates to drive the first shaft. Since both the first and second shafts are connected to the gearbox, the rotation of the first shaft further drives the rotation of the second shaft. Because the second and third shafts are connected by a threaded structure, when the third shaft is fixed to the frame, the threaded structure allows for adjustment of the second shaft's length relative to the third shaft, thereby adjusting the distance between the first and second traveling mechanisms, i.e., adjusting the ridge spacing. When ridge spacing adjustment is not required, the connection between the third shaft and the frame is released, allowing the gearbox to drive the first and second shafts on both sides to rotate, thus driving the first and second traveling mechanisms.

[0009] As described above, in a variable ridge spacing frame for a crop harvester, the first shaft and the rotating shaft are engaged by a threaded structure or a gear structure. The rotating shaft is located between the first traveling mechanism and the second traveling mechanism, and the rotating shaft drives the first shaft meshing with it to rotate through the threaded structure or gear structure.

[0010] As described above, in a variable ridge spacing frame for a crop harvester, a first protrusion is circumferentially provided on the side of the first axle near the first traveling mechanism, and a second protrusion is circumferentially provided on the side of the rotating shaft near the first traveling mechanism. The first protrusion and the second protrusion are engaged by a threaded structure or a gear structure.

[0011] As described above, in a variable ridge spacing frame for a crop harvester, the housing of the gearbox is detachably fixed to the frame body. Under normal conditions, the gearbox housing is fixed to the frame body, and when it is necessary to adjust the ridge spacing, the connection between the gearbox housing and the frame body is removed.

[0012] The frame body is movably provided with a first connecting member, and the gearbox housing is provided with a first fixing part. One end of the first connecting member is detachably installed on the first fixing part, and one end of the first connecting member is movably connected to the frame body, which facilitates the quick connection or disconnection of the gearbox housing and the frame body.

[0013] As described above, in order to fix the frame body and the third axle, the frame body is movably provided with a second connecting member, and the third axle is provided with a second fixing part. One end of the second connecting member is detachably installed on the second fixing part. After the row spacing is adjusted, the connection between the third axle and the frame body needs to be removed so that the second traveling mechanism can be driven by the third axle to work.

[0014] As described above, in a variable ridge spacing frame for a crop harvester, the rotating shaft is supported on the inner side of a sleeve by a bushing. The sleeve is fixed to the frame body. The sleeve facilitates the rotation of the rotating shaft relative to the frame body. The bushing also facilitates the movement of the rotating shaft along the sleeve. Thus, after the ridge spacing is adjusted, the rotating shaft can move along the sleeve toward the second traveling mechanism.

[0015] The two ends of the rotating shaft extend beyond the two ends of the sleeve, and one end of the rotating shaft is connected to the rocker arm.

[0016] As described above, a variable ridge spacing frame for a crop harvester has a groove at one end of the rotating shaft near the second traveling mechanism. The groove has a set length and is arranged along the length direction of the rotating shaft. A limiting member can be located circumferentially on the rotating shaft. The limiting member has a protrusion that mates with the groove. A locking member can lock the limiting member. The frame body is provided with a limiting block for limiting the limiting member.

[0017] As described above, a variable ridge spacing frame for a crop harvester includes a first walking mechanism comprising a first track and a second walking mechanism comprising a second track. A first shaft meshes with the inner surface of the upper side of the first track via a first gear, the first gear being mounted on the first shaft. A third shaft meshes with the inner surface of the upper side of the second track via a second gear, the second gear being mounted on the third shaft. A gearbox drives the first gear to rotate via the first shaft, thereby driving the first track to rotate. The gearbox then drives the third shaft to rotate via the second shaft, thereby driving the second gear to rotate, and thus driving the second track to rotate.

[0018] The first track and the second track are respectively supported by trapezoidal support frames, which are fixed to both sides of the vehicle frame body.

[0019] To facilitate the rotation of the first track and the second track, multiple rollers are rotatably installed on the bottom side of the trapezoidal support frame, with the outer surface of the rollers contacting the inner surface of the bottom side of the first track or the second track.

[0020] An extension mechanism is installed between the trapezoidal support frames on both sides to adjust with the ridge spacing, so as to ensure the stability of the trapezoidal support frames on both sides as a whole.

[0021] Secondly, the present invention also provides a scallion harvester, including the aforementioned variable ridge spacing frame for crop harvesters.

[0022] Thirdly, the present invention also provides a method for operating a variable ridge spacing frame for a crop harvester, comprising the following:

[0023] The third shaft is fixed relative to the frame body. The rotating shaft is manually rotated, and the rotating shaft rotates relative to the frame body. Under the action of the threaded structure between the rotating shaft and the first shaft, the first shaft rotates. Since the gearbox connects the first shaft and the second shaft, the second shaft is driven to rotate relative to the third shaft through the gearbox.

[0024] Because the third shaft is fixed, the length of the third shaft relative to the second shaft can be adjusted by the threaded structure between the second and third shafts, thereby adjusting the distance between the first and second traveling mechanisms.

[0025] After adjustment, loosen the connection between the third axle and the frame body.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1) This invention provides a variable ridge spacing frame. The frame body supports the first and second traveling mechanisms. The frame body movably supports the rotating shaft. The rotation of the rotating shaft can drive the first shaft to rotate. Since both the first and second shafts are connected to the gearbox, the rotation of the first shaft drives the rotation of the second shaft. When the third shaft is fixed to the frame body, the second and third shafts are connected by a threaded structure, which allows for adjustment of the length of the second shaft relative to the third shaft. This allows for adjustment of the distance between the first and second traveling mechanisms, i.e., rapid adjustment of the ridge spacing. The overall structure is a purely mechanical structure, which facilitates ridge spacing adjustment while ensuring the stability of the structure during travel.

[0028] 2) In this invention, the third shaft is detachably connected to the frame body. When the row spacing is not needed, the connection between the third shaft and the frame body can be loosened, and the first shaft and the second shaft on both sides can be driven by the gearbox to drive the third shaft to rotate, thereby driving the first travel mechanism and the second travel mechanism to work. When the row spacing needs to be adjusted, the third shaft can be fixed to the frame body, and the row spacing can be quickly adjusted.

[0029] 3) The variable ridge spacing frame structure of the present invention is reasonably designed. The first shaft and the rotating shaft are arranged vertically, and the rotating shaft and the first shaft are meshed through a threaded structure or gear mechanism. Thus, the rotation of the rotating shaft drives the rotation of the first shaft. The frame body supports the rotating shaft through a sleeve. The second shaft and the third shaft are connected through a threaded structure. Not only can the second shaft drive the third shaft to rotate to drive the second traveling mechanism, but when the third shaft is fixed, it can also facilitate the rapid adjustment of the ridge spacing and avoid excessive impact on the operation of the crop harvester. At the same time, the overall structure is reasonably designed to ensure the stability of the variable ridge spacing frame structure during operation.

[0030] 4) In this invention, the gearbox housing and the frame body are detachably connected. Under normal circumstances, the gearbox and the frame body are fixed. When it is necessary to adjust the ridge spacing, the connection between the gearbox housing and the frame body is removed. Then, the first shaft drives the gearbox housing and the second shaft to rotate relative to the third shaft, thereby adjusting the extension length of the third shaft relative to the second shaft and thus adjusting the ridge spacing.

[0031] 5) In this invention, the rotating shaft can be equipped with a limiting member, which can be located in the circumferential direction of the rotating shaft and locked by a locking member. The frame body is equipped with a limiting block for limiting the limiting member. Specifically, the limiting member is limited by limiting the locking member, thereby preventing the rotating shaft from rotating during the movement of the variable pitch frame. Moreover, the rotating shaft can move relative to the length direction of the sleeve, thereby disengaging the rotating shaft from the meshing point with the first shaft and avoiding affecting the normal operation of the first shaft. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1 This is a schematic diagram of a variable ridge spacing frame for a crop harvester according to one or more embodiments of the present invention. Figure 1 .

[0034] Figure 2 This is a schematic diagram of a variable ridge spacing frame for a crop harvester according to one or more embodiments of the present invention. Figure 2 .

[0035] Figure 3 This is a schematic diagram of a limiting ring disposed on a rotating shaft in a variable ridge spacing frame for a crop harvester according to one or more embodiments of the present invention.

[0036] Figure 4 This is an enlarged schematic diagram of the connection between the second and third axles in a variable ridge spacing frame for a crop harvester according to one or more embodiments of the present invention.

[0037] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0038] The components are: 1. chassis body, 2. gearbox, 3. third axle, 4. first gear, 5. trapezoidal support frame, 6. triangular track, 7. roller, 8. rotating shaft, 9. first protrusion, 10. second protrusion, 11. sleeve, 12. first axle, 13. second axle, 14. limiting component, 15. telescopic fixing section, and 16. telescopic rod. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] As described in the background section, existing agricultural machinery for crops such as scallions cannot adjust the row spacing. To solve this technical problem, this invention proposes a variable row spacing frame for crop harvesters.

[0042] Example 1

[0043] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a variable ridge spacing frame for a crop harvester includes a frame body 1, which supports a ridge spacing adjustment mechanism. A first axle 12 supports a first traveling mechanism, a second axle 13 is connected to a third axle 3, and the third axle 3 supports a second traveling mechanism. The first axle 12 and the second axle 13 are respectively connected to a gearbox 2. The second axle 12 and the third axle 3 are connected by a threaded structure. The ridge spacing adjustment mechanism can drive the first axle 12 to move relative to the second axle 13 to adjust the distance between the first traveling mechanism and the second traveling mechanism. The ridge spacing adjustment mechanism includes a rotating shaft 8 rotatably mounted on the frame body. The first axle 12 and the rotating shaft 8 are arranged vertically. The third axle 3 is detachably connected to the frame body 1. The rotating shaft 8 can drive the first axle 12 to rotate. The first axle 12 drives the second axle 13 to rotate relative to the third axle 3 through the gearbox 2, thereby adjusting the distance between the first traveling mechanism and the second traveling mechanism.

[0044] Understandably, the frame body 1 is used to fix the walking mechanism and other mechanical structures of the crop harvester. The gearbox 2 is an existing gearbox that can drive the rotation of the first shaft 12 and the second shaft 13. The frame body 1 can be a rectangular frame with a support rod in the middle of the rectangular frame. The sleeve is fixed by the support rod. The rotating shaft 8 is supported on the inside of the sleeve 11 by a bushing. The bushing facilitates the rotation of the rotating shaft 8 relative to the frame body 1 and also facilitates the movement of the rotating shaft along the sleeve. After the row spacing is adjusted, the rotating shaft can be moved along the sleeve 11 toward the second walking mechanism, so that the meshing point between the rotating shaft and the first shaft can be separated. The first shaft will not drive the rotation of the rotating shaft during rotation.

[0045] For ease of operation, the two ends of the rotating shaft 8 extend beyond the two ends of the sleeve 11. One end of the rotating shaft 8 is connected to the rocker arm, which is an L-shaped rocker arm. The longer side of the rocker arm is detachably connected to the rotating shaft via a protrusion. The rocker arm extends beyond the second traveling mechanism to avoid interference with the second traveling mechanism. Moreover, the detachable rocker arm can be removed when the ridge spacing does not need to be changed.

[0046] Furthermore, to prevent the rotating shaft 8 from rotating during the travel of the variable pitch frame, a groove is provided at one end of the rotating shaft 8 near the second traveling mechanism. The groove has a predetermined length (less than the length of the rotating shaft 8) and is positioned along the length of the rotating shaft 8. The inner surface of the limiting member 14 can engage with the groove of the rotating shaft through a protrusion. (Refer to...) Figure 3 As shown, the limiting member 14 is specifically a limiting ring with a bolt hole. The limiting member 14 is located circumferentially behind the rotating shaft. The bolt passes through the bolt hole. An L-shaped limiting block is set on the upper surface of the frame body. The limiting member moves along the length direction of the rotating shaft, and the L-shaped limiting block limits the bolt head. The bolt is then locked with a nut, thereby limiting the rotation of the rotating shaft. When it is necessary to adjust the ridge spacing, the nut is loosened, and the limiting member 14 is moved along the groove to remove the limiting member from the end of the rotating shaft.

[0047] In this embodiment, the first walking mechanism includes a first track, and the second walking mechanism includes a second track. Both the first track and the second track are triangular tracks 6. The first track and the second track are supported by trapezoidal support frames 5, with the short side of the trapezoidal support frame 5 on top and the long side on the bottom. The trapezoidal support frame 5 is fixed to both sides of the vehicle frame body 1.

[0048] The first shaft 12 meshes with the inner surface of the upper side of the first track via the first gear 4. The first shaft passes through the first gear, and the first gear 4 is mounted on the first shaft 12. The third shaft 3 meshes with the inner surface of the upper side of the second track via the second gear, and the second gear is mounted on the third shaft 3. (Reference) Figure 4 As shown, the third shaft can be a variable diameter shaft. The thicker side of the third shaft supports the second gear to drive the rotation of the second gear, and the thinner side is provided with a threaded structure to cooperate with the second shaft. The third shaft passes through the second gear. The gearbox 2 drives the first gear 4 to rotate through the first shaft, thereby driving the first track to rotate. Then, it drives the third shaft to rotate through the second shaft, thereby driving the second gear to rotate, and thus driving the second track to rotate.

[0049] In this system, the first gear 4 of the first traveling mechanism is located above the trapezoidal support frame 5 on the same side, the second gear of the second traveling mechanism is located above the trapezoidal support frame on the same side, and the trapezoidal support frame on the corresponding side is located inside the track on the corresponding side.

[0050] Furthermore, a telescopic mechanism is provided between the trapezoidal support frames on both sides to adjust with the ridge spacing, thereby ensuring the stability of the connection between the trapezoidal support frames on both sides. The telescopic mechanism includes a telescopic fixing section 15, which is fixed to one side of the trapezoidal support frame 5. The telescopic fixing section is hollow, and one end of the telescopic rod 16 can be inserted into the hollow part of the telescopic fixing section. A fastening bolt is provided outside the telescopic fixing section, and the fastening bolt passes through one side of the telescopic fixing section and abuts against the telescopic rod 16 to ensure that the telescopic mechanism is fixed after the length is adjusted.

[0051] It is easy to understand that, in order to facilitate the rotation of the first track and the second track, multiple rollers 7 are rotatably provided on the bottom side of the trapezoidal support frame 5. Rollers 7 are also provided at the bends on the bottom side of the trapezoidal support frame 5. The central axis of the rollers 7 is parallel to the central axis of the first gear or the second gear. The distance between two adjacent rollers at the bottom of each trapezoidal support frame is the same. The outer surface of the rollers is in contact with the inner surface of the bottom side of the first track or the second track.

[0052] It should be explained that the first shaft 12 and the rotating shaft 8 are engaged by a threaded structure or a gear structure. The rotating shaft 8 is located between the first traveling mechanism and the second traveling mechanism, that is, the length of the rotating shaft is shorter than the distance between the first traveling mechanism and the second traveling mechanism. The rotating shaft drives the first shaft meshing with it to rotate through the threaded structure or gear structure.

[0053] Specifically, a first protrusion 9 is circumferentially arranged on the side of the first shaft 12 near the first traveling mechanism. The first protrusion 9 is specifically a first ring. A second protrusion 10 is circumferentially arranged on the side of the rotating shaft 8 near the first traveling mechanism. The second protrusion 10 is a second ring. The outer diameter of the second ring is smaller than the outer diameter of the first ring. The first ring is circumferentially threaded, and the second ring is circumferentially threaded to mesh with the thread of the first ring. Alternatively, the first protrusion forms a third gear, and the second protrusion forms a fourth gear. The third gear and the fourth gear can mesh. Accordingly, by moving the rotating shaft along the bushing toward the second traveling mechanism, the meshing points of the first protrusion and the second protrusion can be separated.

[0054] Alternatively, in some examples, the first protrusion is provided only in the circumferential direction of the first shaft, and the second protrusion is not required in the circumferential direction of the rotating shaft. The rotating shaft is provided with a thread below the first protrusion that engages with the circumferential thread of the first protrusion.

[0055] In this embodiment, to ensure the stable setting of the gearbox 2, the housing of the gearbox 2 is detachably fixed to the frame body. Under normal conditions, the gearbox housing is fixed to the frame body 1. When it is necessary to adjust the pitch, the connection between the gearbox housing and the frame body is removed.

[0056] Specifically, the frame body 1 is movably provided with a first connecting member, which may be a first connecting rod. The first connecting member has a set width to stably support the gearbox housing. One end of the first connecting member can be hinged to the frame body 1, and the other end of the first connecting member is provided with a first hook. The gearbox housing is provided with a first fixing part, which is a first opening. The first hook can be inserted into the first opening. Through the cooperation between the first hook and the first opening, it is convenient to quickly connect or disconnect the gearbox housing and the frame body. When the ridge spacing does not need to be adjusted, the first hook of the first connecting member is inserted into the first opening. When the ridge spacing needs to be adjusted, the first hook can be removed from the first opening.

[0057] To fix the frame body 1 to the third axle 3, a second connecting member is movably installed on the frame body. The second connecting member is located between the first connecting member and the second traveling mechanism. The third axle is provided with a second fixing part. The second connecting member can specifically be a second connecting rod. One end of the first connecting member is hinged and fixed to the frame body, and the other end of the first connecting member is provided with a second hook. The fixing axle is provided with a second fixing part, which is specifically a second opening. Under normal conditions, the second hook and the second opening are separated. When it is necessary to adjust the row spacing, the second hook is hung at the second opening. After the row spacing is adjusted, the second hook is separated from the second opening. The second traveling mechanism is then driven by the third axle to work.

[0058] The variable ridge spacing vehicle frame provided in this embodiment supports the first and second traveling mechanisms. The frame body supports the rotating shaft via a sleeve. The rotating shaft is manually rotated by a rocker arm, which drives the first shaft to rotate. Since both the first and second shafts are connected to the gearbox, the rotation of the first shaft drives the rotation of the second shaft. Because the second and third shafts are connected by a threaded structure, when the third shaft is fixed to the frame body, the threaded structure allows for adjustment of the length of the second shaft relative to the third shaft, thereby adjusting the distance between the first and second traveling mechanisms, i.e., adjusting the ridge spacing. When ridge spacing adjustment is not required, the connection between the third shaft and the frame body is released, and the gearbox drives the first and second shafts on both sides to rotate, thereby driving the first and second traveling mechanisms to operate normally. This allows for rapid adjustment of the ridge spacing. Moreover, the structure is reasonably designed and will not affect the normal operation of the variable ridge spacing vehicle frame. The purely mechanical structure helps to ensure stability during operation.

[0059] A method for operating a variable ridge spacing frame for a crop harvester, comprising the following:

[0060] Release the telescopic mechanism;

[0061] The third shaft is fixed relative to the frame body. The rotating shaft is manually rotated, and the rotating shaft rotates relative to the frame body. Under the action of the threaded structure or gear structure meshing between the rotating shaft and the first shaft, the first shaft rotates. Since the gearbox connects the first shaft and the second shaft, the second shaft is driven to rotate relative to the third shaft through the gearbox.

[0062] Because the third shaft is fixed, the length of the third shaft relative to the second shaft can be adjusted by the threaded structure between the second and third shafts, thereby adjusting the distance between the first and second traveling mechanisms, which is to say, adjusting the ridge spacing.

[0063] After the ridge spacing is adjusted, loosen the connection between the third shaft and the frame body, connect the gearbox housing to the frame body, pull out the rotating shaft relative to the sleeve to separate the rotating shaft from the first shaft, and install the limit ring on the end of the rotating shaft near the second traveling mechanism to restrict the rotation of the rotating shaft, and fix the telescopic mechanism.

[0064] Example 2

[0065] This embodiment provides a scallion harvester, including the variable ridge spacing frame for crop harvesters described in Embodiment 1.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A variable ridge spacing frame for a crop harvester, characterized in that, The system includes a frame body, which supports a pitch adjustment mechanism. A first axle supports a first traveling mechanism. A second axle is connected to a third axle, and the third axle supports a second traveling mechanism. The first and second axles are respectively connected to a gearbox. The second and third axles are connected by a threaded structure. The third axle is detachably connected to the frame body. The length of the rotating shaft is shorter than the distance between the first and second traveling mechanisms. The rotating shaft drives the first axle, which meshes with it, to rotate through a threaded structure or a gear structure. The first axle drives the second axle to rotate relative to the third axle through the gearbox to adjust the pitch between the first and second traveling mechanisms. The ridge spacing adjustment mechanism includes a rotating shaft rotatably mounted on the frame body. A first shaft and the rotating shaft are arranged vertically. The rotating shaft is supported inside the sleeve by a bushing. The bushing facilitates the rotation of the rotating shaft relative to the frame body and also facilitates the movement of the rotating shaft along the sleeve. The two ends of the rotating shaft extend beyond the two ends of the sleeve, and one end of the rotating shaft is connected to a rocker arm. The rocker arm is L-shaped, and its longer side is detachably connected to the rotating shaft. The rocker arm extends beyond the second traveling mechanism to avoid interference with the second traveling mechanism. The sleeve is fixed to the frame body, and the rotating shaft moves along the sleeve to separate or engage the mating point between the rotating shaft and the first shaft. The first walking mechanism includes a first track, and the second walking mechanism includes a second track. The first track and the second track are supported by trapezoidal support frames, which are fixed to both sides of the vehicle frame body. A telescopic mechanism is provided between the trapezoidal support frames on both sides. The telescopic mechanism includes a telescopic fixed section, which is fixed to one side of the trapezoidal support frame. The telescopic fixed section is hollow, and one end of the telescopic rod can be inserted into the hollow part of the telescopic fixed section. A fastening bolt is provided outside the telescopic fixed section, and the fastening bolt passes through one side of the telescopic fixed section and abuts against the telescopic rod. A groove is provided at one end of the rotating shaft near the second traveling mechanism. The groove has a set length and is arranged along the length direction of the rotating shaft. A limiting member can be provided on the rotating shaft. The limiting member can be located in the circumferential direction of the rotating shaft and locked by a locking member. The limiting member has a protrusion that cooperates with the groove. The frame body is provided with a limiting block for limiting the limiting member.

2. The variable ridge spacing frame for a crop harvester according to claim 1, characterized in that, The first shaft and the rotating shaft are engaged by a threaded structure or a gear structure, and the rotating shaft is located between the first traveling mechanism and the second traveling mechanism.

3. A variable ridge spacing frame for a crop harvester according to claim 2, characterized in that, The first shaft has a first protrusion circumferentially arranged on the side near the first traveling mechanism, and the rotating shaft has a second protrusion circumferentially arranged on the side near the first traveling mechanism. The first protrusion and the second protrusion are engaged by a threaded structure or a gear structure.

4. A variable ridge spacing frame for a crop harvester according to claim 1, characterized in that, The housing of the gearbox is detachably fixed to the vehicle frame body; The frame body is movably provided with a first connecting member, and the gearbox housing is provided with a first fixing part. One end of the first connecting member is detachably installed on the first fixing part.

5. A variable ridge spacing frame for a crop harvester according to claim 1, characterized in that, The frame body is movably provided with a second connecting member, and the third shaft is provided with a second fixing part. One end of the second connecting member can be detachably installed on the second fixing part.

6. A variable ridge spacing frame for a crop harvester according to claim 1, characterized in that, The first shaft meshes with the inner surface of the upper side of the first track through a first gear, and the first gear is mounted on the first shaft. The third shaft meshes with the inner surface of the upper side of the second track through a second gear, and the second gear is mounted on the third shaft. Multiple rollers are rotatably mounted on the bottom side of the trapezoidal support frame, and the outer surface of the rollers contacts the inner surface of the bottom side of the first track or the second track.

7. A scallion harvester, comprising a variable ridge spacing frame for a crop harvester as described in any one of claims 1-6.

8. A method for operating a variable ridge spacing frame for a crop harvester according to any one of claims 1-6, characterized in that, Includes the following: The third shaft is fixed relative to the frame body. The rotating shaft is manually rotated, and the rotating shaft rotates relative to the frame body. Under the action of the threaded structure between the rotating shaft and the first shaft, the first shaft rotates. Since the gearbox connects the first shaft and the second shaft, the second shaft is driven to rotate relative to the third shaft through the gearbox. Because the third shaft is fixed, the length of the third shaft relative to the second shaft can be adjusted by the threaded structure between the second and third shafts, thereby adjusting the distance between the first and second traveling mechanisms. After adjustment, loosen the connection between the third axle and the frame body.

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