Box type tractor based on linkage control

Improvements to the control components and installation methods have enabled flexible adjustment of the tractor trailer height, solving the problem of fixed trailer height and improving transportation safety and convenience.

CN223864980UActive Publication Date: 2026-02-03BENYE YOUSEN TRACTOR MFG CO LTD
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Patent Information

Application Number
CN202520397714.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-09
Publication Date
2026-02-03
Estimated Expiration
2035-03-09

AI Technical Summary

Technical Problem

The fixed height of the sides of the trailer of the existing box tractor makes it easy to exceed the boundary when transporting too much cargo, which may cause the cargo to fall and cause safety accidents.

Method used

The height of the lifting plate is adjusted by controlling components (including a fixed box, a first rotating rod, a drive gear, a rotating sleeve, a lifting rod, and a driven gear), and combined with the installation methods of the side guards and the rear guards, the height of the trailer can be flexibly adjusted.

Benefits of technology

It effectively prevents cargo from falling off the trailer boundary, reducing cargo loss and the risk of safety accidents, while also improving the ease of use and operation of the tractor.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of tractors, and discloses a box-type tractor based on linkage control, which comprises a tractor body, two groups of support plates are arranged on the side wall of the tractor body, side guard plates are arranged on the two sides of the support plates, a rear guard plate is arranged on the rear side of the support plates, and the two groups of support plates are arranged in parallel. A lifting plate is slidably connected to the top end of the supporting plate, a control assembly is arranged between the lifting plate and the fixing box, a lifting rod is fixedly connected to the side portion of the lifting plate, and the control assembly controls the height of the lifting plate by controlling lifting of the lifting rod. The height of the lifting plate can be flexibly adjusted according to the cargo loading capacity through a control assembly (comprising a fixing box, a first rotating rod, a driving gear, a rotating sleeve, a lifting rod and a driven gear), the problem that the heights of the two sides of the dragging box are fixed is solved, the situation that cargoes exceed the boundary of the dragging box and fall off is avoided, and cargo loss and safety accident risks are reduced.
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Description

Technical Field

[0001] This utility model relates to the field of tractor technology, specifically to a box tractor based on linkage control. Background Technology

[0002] The box tractor based on linkage control is a transportation equipment used in agricultural transportation, engineering material handling, and other scenarios. Through an advanced linkage control system, it realizes the coordinated operation of various components of the tractor and the trailer, and can flexibly adjust the loading status of the trailer according to different operational needs, greatly improving transportation efficiency and operational convenience.

[0003] Application No. 202221847253.9 discloses a box tractor based on linkage control. This utility model, through the setting of the support component, first brakes the tires of the trailer when disassembling the trailer. When the tractor body pulls out the connecting plate, the connecting plate will drive the rotating shaft to rotate in sequence through the tooth groove, gear, worm and worm wheel, thereby automatically rotating out the support frame to support the front end of the trailer. When connecting the trailer, the connecting plate can drive the gear to rotate in the opposite direction, thereby automatically retracting the support frame. This allows for linkage control of the support component when disassembling and assembling the trailer, improving the convenience of use. It can also enhance the stability of the support frame when supported by the self-locking performance between the worm and worm wheel.

[0004] When the above-mentioned device is in use, the height of both sides of the trailer is fixed. When there are too many goods to transport, the height of the trailer cannot be adjusted, and the goods may exceed the boundaries of the trailer. This can easily lead to the risk of falling during transportation, which may not only cause damage to the goods but also cause safety accidents. Therefore, we propose a box tractor based on linkage control. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a box tractor based on linkage control, which solves the problem that when the above-mentioned devices are in use, the height of both sides of the trailer is fixed. When transporting too much cargo, the height of the trailer cannot be adjusted, and the cargo may exceed the trailer boundary, which may easily lead to the risk of falling during transportation, causing not only cargo loss but also potential safety accidents.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a box-type tractor based on linkage control, comprising a tractor body, a support plate installed on the side wall of the tractor body, side guard plates provided on both sides of the support plate, a rear guard plate provided on the rear side of the support plate, two sets of support plates, a lifting plate slidably connected to the top of the support plate, a control component provided between the lifting plate and the fixed box, a lifting rod fixedly connected to the side of the lifting plate, and the control component controlling the height of the lifting plate by controlling the lifting of the lifting rod.

[0007] Preferably, the control assembly includes a fixed box, a first rotating rod, a drive gear, a rotating sleeve, a lifting rod, and a driven gear. The fixed box is fixedly connected to the side wall of the side guard plate. The first rotating rod is rotatably connected to the side wall of the fixed box. The drive gear is fixedly sleeved on one end of the first rotating rod. The rotating sleeve is rotatably connected to the inner wall of the fixed box. The driven gear is fixedly sleeved on the bottom end of the rotating sleeve. The driven gear meshes with the outer wall of the drive gear. The bottom end of the lifting rod is threaded and threadedly connected to the inner wall of the rotating sleeve. The outer wall of the lifting rod is slidably connected to the inner wall of the top of the fixed box.

[0008] Preferably, the side wall of the side guard plate is provided with a positioning groove, and the bottom end of the side guard plate matches the positioning groove.

[0009] Preferably, bolts are provided between the support plate and the side guard plate.

[0010] Preferably, the rear guard plate has a limiting groove on its side wall, and the side guard plate has a limiting component on its side wall.

[0011] Preferably, the limiting component includes a pull rod, a spring, and an L-shaped insert. The pull rod is slidably connected to the side wall of the side guard plate. One end of the L-shaped insert is movably engaged in the limiting groove. The top of the L-shaped insert is fixedly connected to the bottom of the pull rod. The spring is fixedly connected between the top of the L-shaped insert and the side wall of the spring and is movably sleeved on the outer wall of the pull rod.

[0012] Preferably, the fixing block is fixedly connected to the side wall of the support plate, and an installation groove is formed on the fixing block, which matches the bottom end of the rear guard plate.

[0013] Compared with the prior art, this utility model provides a box tractor based on linkage control, which has the following beneficial effects:

[0014] 1. This box tractor based on linkage control can flexibly adjust the height of the lifting plate according to the cargo load through control components (including fixed box, first rotating rod, drive gear, rotating sleeve, lifting rod, driven gear, etc.), which solves the problem of fixed height on both sides of the trailer box, avoids cargo from falling off the trailer box boundary, and reduces cargo loss and safety accident risks.

[0015] 2. The box-type tractor based on linkage control has side guards installed on the support plate through positioning slots and bolts, and rear guards installed through tie rods, springs, L-shaped inserts, limit slots, and mounting slots. This installation method is simple and convenient to operate, facilitates quick assembly and disassembly, and improves the ease of use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 4 for Figure 1 A magnified view of part A in the diagram;

[0020] Figure 5 for Figure 2 A magnified view of section B in the diagram;

[0021] Figure 6 for Figure 3 A magnified view of part C in the diagram.

[0022] In the diagram: 1. Tractor body; 2. Support plate; 3. Rear guard plate; 4. Side guard plate; 5. Bolt; 6. Tie rod; 7. Spring; 8. L-shaped insert; 9. Limiting groove; 10. Positioning groove; 11. Mounting groove; 12. Fixing block; 13. Lifting plate; 14. Fixing box; 15. First rotating rod; 16. Drive gear; 17. Rotating sleeve; 18. Driven gear; 19. Lifting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 A box-type tractor based on linkage control includes a tractor body 1, a support plate 2 installed on the side wall of the tractor body 1, side guard plates 4 on both sides of the support plate 2, and a rear guard plate 3 on the rear side of the support plate 2. The support plate 2 has two sets of support plates, and a lifting plate 13 is slidably connected to the top of the support plate 2. A control component is provided between the lifting plate 13 and the fixed box 14. A lifting rod 19 is fixedly connected to the side of the lifting plate 13. The control component controls the height of the lifting plate 13 by controlling the lifting of the lifting rod 19. The support plate 2 on the side wall of the tractor body 1 is the basic support component of the entire trailer structure. After the side guard plates 4 and the rear guard plate 3 are installed to construct the trailer frame, the control component begins to function when the loading space needs to be adjusted. Rotating the first rotating rod 15 drives the drive gear 16 to rotate. Through gear meshing, the driven gear 18 drives the rotating sleeve 17 to rotate, thereby causing the lifting rod 19, which is threadedly connected to the rotating sleeve 17, to rise and fall. Ultimately, this causes the lifting plate 13 to move up and down along the side guard plate 4, realizing the adjustment of the trailer loading height.

[0025] The control assembly includes a fixed box 14, a first rotating rod 15, a drive gear 16, a rotating sleeve 17, a lifting rod 19, and a driven gear 18. The fixed box 14 is fixedly connected to the side wall of the side guard plate 4. The first rotating rod 15 is rotatably connected to the side wall of the fixed box 14. The drive gear 16 is fixedly sleeved at one end of the first rotating rod 15. The rotating sleeve 17 is rotatably connected to the inner wall of the fixed box 14. The driven gear 18 is fixedly sleeved at the bottom end of the rotating sleeve 17 and meshes with the outer wall of the drive gear 16. The bottom end of the lifting rod 19 is threaded and threadedly connected to the inner wall of the rotating sleeve 17. The outer wall of the lifting rod 19 is slidably connected to the inner wall of the top of the fixed box 14. When it is necessary to adjust the height of the lifting plate 13, the first rotating rod 15 is rotated, which drives the drive gear 16 fixedly sleeved at one end to rotate. The drive gear 16 meshes with the driven gear 18, driving the driven gear 18 to rotate, which in turn drives the rotating sleeve 17 fixedly sleeved at the bottom end to rotate. Since the bottom end of the lifting rod 19 is threadedly connected to the inner wall of the rotating sleeve 17, and the outer wall of the lifting rod 19 is slidably connected to the inner wall of the top of the fixed box 14, under the limiting action of the fixed box 14, the rotation of the rotating sleeve 17 causes the lifting rod 19 to rise and fall, thereby driving the lifting plate 13 to rise and fall along the side guard plate 4.

[0026] The side guard plate 4 has a positioning groove 10 on its side wall, and the bottom end of the side guard plate 4 matches the positioning groove 10. Bolts 5 are provided between the support plate 2 and the side guard plate 4. When installing the side guard plate 4, the bottom end of the side guard plate 4 is aligned with the positioning groove 10 on the side wall of the support plate 2 and inserted to initially determine the position of the side guard plate 4. Then, the bolts 5 are used to pass through the corresponding holes on the side guard plate 4 and the support plate 2 for fastening connection.

[0027] The rear guard plate 3 has a limiting groove 9 on its side wall, and the side guard plate 4 has a limiting component. The limiting component includes a pull rod 6, a spring 7, and an L-shaped insert 8. The pull rod 6 is slidably connected to the side wall of the side guard plate 4. One end of the L-shaped insert 8 is movably engaged with the limiting groove 9. The top of the L-shaped insert 8 is fixedly connected to the bottom of the pull rod 6. The spring 7 is fixedly connected between the top of the L-shaped insert 8 and the side wall of the spring 7, and is movably sleeved on the outer wall of the pull rod 6. The fixing block 12 has an installation groove 11, which matches the bottom end of the rear guard plate 3. When installing the side guard plate 4, align the side guard plate 4 with the positioning groove 10 on the support plate 2 and insert it. Then, use bolts 5 to fasten the side guard plate 4 to the support plate 2 to complete the installation of the side guard plate 4. When installing the rear guard plate 3, first pull the pull rod 6. At this time, the spring 7 is compressed. The pull rod 6 drives the L-shaped insert 8 to move upward. Then, insert the bottom of the rear guard plate 3 into the mounting groove 11 on the side wall fixing block 12 of the support plate 2. Release the pull rod 6, and the spring 7 returns to its original position, so that the L-shaped insert 8 is engaged in the limiting groove 9. The installation of the guard plate 3 is then completed.

[0028] Structural Description: Tractor Body 1: As the core power and control component of the entire box tractor, it provides the power source for the entire equipment. The driver operates the tractor body, controlling the tractor's direction and speed. Simultaneously, the side walls of the tractor body 1 form the basis for mounting the support plate 2, connecting and supporting the entire trailer structure, ensuring the trailer operates in coordination with the tractor during transportation.

[0029] Support plate 2: Fixedly installed on the side wall of the tractor body 1, it is the basic support component of the trailer structure. It provides mounting positions for the side guard plate 4 and the rear guard plate 3. It cooperates with the side guard plate 4 through the positioning groove 10 and with the rear guard plate 3 through the mounting groove 11 on the fixing block 12, thus constructing the frame of the trailer. In addition, the support plate 2 also supports components such as the lifting plate 13, providing a supporting foundation for the loading and protection functions of the entire trailer.

[0030] Rear guard plate 3: Located at the rear of the trailer, it mainly serves a protective function, preventing goods from falling off the rear of the trailer during transportation. A limiting groove 9 is provided on the side wall of the rear guard plate 3, which cooperates with the limiting components on the side guard plate 4 to achieve installation and fixation. The bottom can be inserted into the mounting groove 11 on the fixing block 12 on the side wall of the support plate 2, providing initial positioning for installation and ensuring the integrity and stability of the trailer structure.

[0031] Side guard plates 4: Located on both sides of the support plate 2, they, together with the rear guard plate 3 and the support plate 2, form the protective frame of the trailer, preventing goods from falling off the sides of the trailer. The bottom end of the side guard plate 4 can be inserted into the positioning groove 10 on the support plate 2 and fastened with bolts 5 to ensure a firm connection. Limiting components are installed on the side wall for connection and fixation with the rear guard plate 3. At the same time, a fixing box 14 is also fixed on its side wall, providing an installation base for the control components that control the height of the lifting plate 13.

[0032] Bolt 5: Used to connect support plate 2 and side guard plate 4. It is tightened by passing through the corresponding holes on side guard plate 4 and support plate 2 to ensure a stable connection between side guard plate 4 and support plate 2. During transportation, side guard plate 4 will not loosen due to vibration or other reasons, thus ensuring the reliability of the trailer structure.

[0033] Pull rod 6: Slidingly connected to the side wall of the side guard plate 4, it is the operating component of the limiting assembly. When installing or removing the rear guard plate 3, pulling the pull rod 6 can drive the L-shaped insert 8 to move, overcoming the elastic force of the spring 7, so that the L-shaped insert 8 disengages from or engages with the limiting groove 9 on the rear guard plate 3, thereby realizing the installation, fixing and removal operations of the rear guard plate 3.

[0034] Spring 7: Fixedly connected between the top of the L-shaped insert 8 and the side wall of the side guard plate 4, and movably sleeved on the outer wall of the pull rod 6. In the limiting assembly, spring 7 provides elastic force. When the pull rod 6 is released, spring 7 returns to its original deformation, pushing the L-shaped insert 8 downward into the limiting groove 9, ensuring the firmness of the rear guard plate 3 installation and preventing the rear guard plate 3 from loosening due to vibration or other reasons during transportation.

[0035] L-shaped insert 8: One end is fixedly connected to the bottom of the pull rod 6, and the other end can be movably engaged with the limiting groove 9 of the rear guard plate 3. Driven by the pull rod 6, the L-shaped insert 8 moves up or down to disengage from or engage with the limiting groove 9, thereby completing the installation and disassembly of the rear guard plate 3 and ensuring the stable connection of the rear guard plate 3 in the trailer.

[0036] Limiting groove 9: It is formed on the side wall of the rear guard plate 3 and is used in conjunction with the L-shaped insert 8. When installing the rear guard plate 3, the L-shaped insert 8 is engaged in the limiting groove 9 under the action of the spring 7, fixing the rear guard plate 3 to the side guard plate 4, preventing the rear guard plate 3 from shifting during transportation and ensuring the integrity of the trailer structure.

[0037] Positioning groove 10: It is formed on the side wall of the support plate 2 and matches the bottom end of the side guard plate 4. When installing the side guard plate 4, the bottom end of the side guard plate 4 is inserted into the positioning groove 10, which can quickly determine the installation position of the side guard plate 4, making it easier to use bolts 5 for subsequent fastening and improving the installation efficiency and accuracy of the side guard plate 4.

[0038] Mounting slot 11: This slot is formed on the fixing block 12 on the side wall of the support plate 2 and matches the bottom end of the rear guard plate 3. When installing the rear guard plate 3, the bottom of the rear guard plate 3 is inserted into the mounting slot 11, which provides initial positioning for the installation of the rear guard plate 3 and facilitates further fixing of the rear guard plate 3 by the limiting component, ensuring the stability of the installation of the rear guard plate 3.

[0039] Fixed block 12: Fixedly connected to the side wall of the support plate 2, the mounting groove 11 on it is used to cooperate with the rear guard plate 3, providing a positioning base for the installation of the rear guard plate 3, enhancing the stability of the connection between the rear guard plate 3 and the support plate 2, and ensuring the stability of the overall structure of the trailer.

[0040] Lifting plate 13: Slidingly connected to the support plate 2 at its top, it is a key component for adjusting the loading height of the trailer. By controlling the lifting rod 19 through the control component, the lifting plate 13 moves up and down along the side guard plate 4, thereby changing the loading height of the trailer to meet the needs of different cargo loading volumes and improve transportation efficiency and safety.

[0041] Fixed box 14: Fixedly connected to the side wall of the side guard plate 4, providing installation space and support for the control components that control the height of the lifting plate 13. Internally installed are components such as the rotating sleeve 17, which work in conjunction with the external first rotating rod 15, drive gear 16, etc., to control the lifting rod 19, thereby controlling the height of the lifting plate 13.

[0042] The first rotating rod 15 is rotatably connected to the side wall of the fixed box 14 and is the operating component of the control assembly. Rotating the first rotating rod 15 can drive the drive gear 16, which is fixedly sleeved at one end, to rotate. Through the gear transmission relationship, the lifting rod 19 can be raised and lowered, thereby adjusting the height of the lifting plate 13. The operation is simple and convenient.

[0043] Drive gear 16: Fixedly sleeved at one end of the first rotating rod 15, meshing with the driven gear 18. When the first rotating rod 15 is rotated, the drive gear 16 rotates accordingly, transmitting power to the driven gear 18, causing the driven gear 18 to rotate, thereby realizing the control of the rotating sleeve 17 and the lifting rod 19. It is a key component for power transmission in the control assembly.

[0044] Rotating sleeve 17: Rotatably connected to the inner wall of the fixed box 14, with a driven gear 18 fixedly sleeved at its bottom end. Driven by the driving gear 16, the driven gear 18 rotates, thereby driving the rotating sleeve 17 to rotate. Since the lifting rod 19 is threadedly connected to the rotating sleeve 17, the rotation of the rotating sleeve 17 causes the lifting rod 19 to move up and down, thereby adjusting the height of the lifting plate 13.

[0045] Driven gear 18: Fixedly sleeved at the bottom end of rotating sleeve 17, meshing with the outer wall of driving gear 16. In the control assembly, driven gear 18 receives power transmitted by driving gear 16, driving rotating sleeve 17 to rotate, thereby controlling lifting rod 19. It is a key link in gear transmission in the control assembly, ensuring the smoothness and reliability of height adjustment of lifting plate 13.

[0046] Lifting rod 19: The bottom end is threaded and threaded to the inner wall of the rotating sleeve 17, and the outer wall is slidably connected to the inner wall of the top of the fixed box 14. Under the rotation of the rotating sleeve 17, the lifting rod 19 moves up and down, and at the same time drives the lifting plate 13 to move up and down along the side guard plate 4, so as to adjust the loading height of the trailer. It is the direct actuator for controlling the height of the lifting plate 13.

[0047] Instructions for use

[0048] When installing the side guard plate 4, align the side guard plate 4 with the positioning groove 10 on the support plate 2 and insert it. Then, use bolts 5 to fasten the side guard plate 4 to the support plate 2 to complete the installation of the side guard plate 4. When installing the rear guard plate 3, first pull the pull rod 6. At this time, the spring 7 is compressed, and the pull rod 6 drives the L-shaped insert 8 to move upward. Then, insert the bottom of the rear guard plate 3 into the mounting groove 11 on the side wall fixing block 12 of the support plate 2. Release the pull rod 6, and the spring 7 returns to its original position, so that the L-shaped insert 8 is engaged with the limiting groove 9. The installation of the guard plate 3 is then completed. When it is necessary to adjust the height of the lifting plate 13, rotate the first rotating rod 15. The first rotating rod 15 drives the drive gear 16, which is fixedly sleeved at one end, to rotate. The drive gear 16 meshes with the driven gear 18, driving the driven gear 18 to rotate. The driven gear 18 then drives the rotating sleeve 17, which is fixedly sleeved at the bottom end of the rotating sleeve 17, to rotate. Since the bottom end of the lifting rod 19 is threadedly connected to the inner wall of the rotating sleeve 17, and the outer wall of the lifting rod 19 is slidably connected to the inner wall of the top of the fixed box 14, under the limiting action of the fixed box 14, the rotation of the rotating sleeve 17 causes the lifting rod 19 to rise and fall, thereby driving the lifting plate 13 to rise and fall along the side guard plate 4.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A box-type tractor based on linkage control, comprising a tractor body (1), a support plate (2) installed on the side wall of the tractor body (1), side guard plates (4) provided on both sides of the support plate (2), and a rear guard plate (3) provided on the rear side of the support plate (2), characterized in that, Also includes: The support plate (2) is provided in two sets. The top of the support plate (2) is slidably connected to a lifting plate (13). A control component is provided between the lifting plate (13) and the fixed box (14). A lifting rod (19) is fixedly connected to the side of the lifting plate (13). The control component controls the height of the lifting plate (13) by controlling the lifting of the lifting rod (19).

2. The box tractor based on linkage control according to claim 1, characterized in that: The control assembly includes a fixed box (14), a first rotating rod (15), a drive gear (16), a rotating sleeve (17), a lifting rod (19), and a driven gear (18). The fixed box (14) is fixedly connected to the side wall of the side guard plate (4). The first rotating rod (15) is rotatably connected to the side wall of the fixed box (14). The drive gear (16) is fixedly sleeved on one end of the first rotating rod (15). The rotating sleeve (17) is rotatably connected to the inner wall of the fixed box (14). The driven gear (18) is fixedly sleeved on the bottom end of the rotating sleeve (17). The driven gear (18) meshes with the outer wall of the drive gear (16). The bottom end of the lifting rod (19) is threaded and threadedly connected to the inner wall of the rotating sleeve (17). The outer wall of the lifting rod (19) is slidably connected to the inner wall of the top of the fixed box (14).

3. A box tractor based on linkage control according to claim 1, characterized in that: The side guard plate (4) has a positioning groove (10) on its side wall, and the bottom end of the side guard plate (4) matches the positioning groove (10).

4. A box tractor based on linkage control according to claim 1, characterized in that: Bolts (5) are provided between the support plate (2) and the side guard plate (4).

5. A box tractor based on linkage control according to claim 1, characterized in that: The rear guard plate (3) has a limiting groove (9) on its side wall, and the side guard plate (4) has a limiting component on its side wall.

6. A box tractor based on linkage control according to claim 5, characterized in that: The limiting assembly includes a pull rod (6), a spring (7), and an L-shaped insert (8). The pull rod (6) is slidably connected to the side wall of the side guard plate (4). One end of the L-shaped insert (8) is movably engaged in the limiting groove (9). The top of the L-shaped insert (8) is fixedly connected to the bottom of the pull rod (6). The spring (7) is fixedly connected between the top of the L-shaped insert (8) and the side wall of the spring (7) and is movably sleeved on the outer wall of the pull rod (6).

7. A box tractor based on linkage control according to claim 1, characterized in that: The fixing block (12) is fixedly connected to the side wall of the support plate (2). The fixing block (12) has an installation groove (11) that matches the bottom of the rear guard plate (3).

Citation Information

Patent Citations

  • Box type tractor based on linkage control

    CN217574749U