A tractor gearbox

Abstract

The utility model relates to the technical field of tractor, concretely relates to a tractor gearbox, both sides of gearbox are fixedly connected with side frame, the inside of two side frames is equipped with connecting plate, and the top of two connecting plates is respectively with the bottom between the inside top and bottom of two side frames sliding connection, one side of two connecting plates is fixedly connected with sliding block, and two sliding blocks are through sliding groove and are between one side of two side frames sliding connection respectively, one side of two sliding blocks is fixedly connected with mounting plate. The problem that it is difficult to carry out longitudinal fine adjustment under the traditional rigid fixed mode is solved, the gearbox can slide on the bottom plate along the front and back directions, thereby effectively compensating the axial misplacement caused by manufacturing errors or installation deviation in the assembly process, the centering accuracy of the input and output shafts is improved, and the risk of faults such as vibration, abnormal sound and gear wear caused by poor coaxiality is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, and in particular to a tractor gearbox. Background Technology

[0002] Tractor gearboxes play a vital role in agricultural machinery. As a core component of the power transmission system, their structural design and operational performance have a decisive impact on the overall power output efficiency, operational stability, and operational safety of the machine. As a crucial link connecting the engine and drive system, the tractor gearbox adjusts the transmission ratio to match the tractor's speed and torque under different working conditions, making it a core device ensuring efficient and stable operation.

[0003] Utility model patent CN212899663U discloses a tractor gearbox housing, including a base, a housing at the upper end of the base, an oil injection box on the upper side wall of the housing, and both outer walls of the oil injection box being fixedly connected to the housing. A baffle is fixedly connected between the two side walls of the oil injection box. A matching second piston block is provided in the oil injection box, and an injection pipe is provided in the oil injection box, sealingly penetrating the baffle and the second piston block. A spiral sealing block is provided at the end of the injection pipe away from the second piston block. This utility model changes the pressure between the baffle and the second piston block by moving the first piston block, thereby causing the second piston block to move up and down, thus allowing lubricating oil to be sprayed regularly from the injection nozzle, effectively reducing friction during the operation of the transmission gears.

[0004] Existing installation methods typically employ a rigid, fixed structure, directly bolting the gearbox to the frame or base. While this provides basic positioning and support, achieving ideal positional matching during actual assembly is often difficult due to manufacturing tolerances, assembly errors, and the precision required for fit between different components. More significantly, existing technologies hinder fine-tuning of the gearbox's axial and radial positions after initial installation, making it difficult to accurately guarantee coaxiality between the input shaft and engine output shaft, and between the output shaft and rear axle input shaft. This can easily lead to vibrations, abnormal noises, and even premature gear wear during transmission, severely impacting assembly efficiency and maintenance convenience. Therefore, to address these shortcomings of existing technologies, we urgently need an innovative tractor gearbox mounting structure or adjustment device to solve these problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a tractor gearbox that solves the problem that the existing installation method usually adopts a rigid fixed structure, which directly installs the gearbox on the frame or base with bolts. Although it can achieve basic positioning and support, it is often difficult to achieve ideal position matching in the actual assembly process due to the influence of manufacturing tolerances, assembly errors and the precision of matching between different components.

[0006] To achieve the above objectives, this utility model provides a tractor gearbox, including a gearbox and base plates fixedly connected to both sides of the bottom of the gearbox, with the tops of the two base plates slidably connected to the bottom of the gearbox.

[0007] Both sides of the gearbox are fixedly connected to side frames. The inner side of each side frame is provided with a connecting plate. The top and bottom of each connecting plate are slidably connected to the top and bottom of the inner side of each side frame, respectively. A sliding block is fixedly connected to one side of each connecting plate. The two sliding blocks are slidably connected to one side of each side frame through sliding grooves. A mounting plate is fixedly connected to one side of each sliding block. Slider blocks are fixedly connected to both sides of the bottom of the gearbox. The two slider blocks are slidably connected to the top of each base plate, respectively.

[0008] The gearbox has a support plate fixedly connected to one side of its bottom. Both sides of the support plate are equipped with insert rods, and one end of each insert rod passes through one side of the support plate and the bottom plate. Several slots are provided on one side of the slider to cooperate with the insert rods.

[0009] The top and bottom of the two connecting plates are fixedly connected with protrusions, and the four protrusions are slidably connected to the top and bottom of the two side frames respectively through movable grooves.

[0010] Each of the two side frames has a top plate on one side, and the bottom of each top plate is fixedly connected to the top of two of the four protrusions. Each top plate has a threaded rod on its top, and the bottom end of each threaded rod passes through the top plate and the top of the side frame in sequence through a threaded groove.

[0011] Both base plates have grooves on their tops, and both sliders are slidably connected to the tops of the two base plates through these grooves.

[0012] The two sliders are fitted with clearance fits between themselves and the two grooves.

[0013] This utility model discloses a tractor gearbox. By incorporating a slider at the bottom of the gearbox that slides slidably onto a base plate, and a sliding fit between the base plate and the gearbox, it solves the problem of difficult longitudinal fine-tuning under traditional rigid fixing methods. This allows the gearbox to slide along the front-rear direction on the base plate, effectively compensating for axial misalignment caused by manufacturing errors or installation deviations during assembly. This improves the alignment accuracy of the input and output shafts and reduces the risk of malfunctions such as vibration, abnormal noise, and gear wear caused by poor coaxiality. Simultaneously, by using a lateral adjustment mechanism consisting of side frames, connecting plates, sliding blocks, sliding grooves, and mounting plates on both sides of the gearbox, the mounting plate is adjustable in the lateral direction, allowing for adjustments based on actual space and other factors during installation or maintenance. The flexible adjustment of the installation point position avoids the forced assembly or connection difficulties caused by fixed positions, significantly improving the flexibility and adaptability of installation. While ensuring the support strength of the gearbox, the overall structure introduces a two-way adjustable mechanism. It retains the stable support function provided by the base plate, and realizes the possibility of fine-tuning the position through sliding connection. This avoids the inefficiency and increased labor intensity caused by repeated disassembly and assembly due to the inability to adjust, which is a problem in existing technologies. It reduces assembly difficulty and maintenance costs, improves the installation versatility of tractor gearboxes under different models or working conditions, and helps to improve the smooth operation and service life of the transmission system, meeting the actual needs of modern agricultural machinery for high efficiency, high precision assembly and high reliability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a top view of an embodiment of the present invention.

[0018] Figure 4 This is a bottom view of the structure of an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the side frame structure of an embodiment of the present utility model.

[0020] 1. Gearbox; 2. Base plate; 3. Slider; 4. Slide groove; 5. Side frame; 6. Connecting plate; 7. Sliding groove; 8. Protrusion; 9. Movable groove; 10. Top plate; 11. Threaded rod; 12. Mounting plate; 13. Support plate; 14. Insert rod; 15. Slot; 16. Sliding block. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 ,

[0023] A tractor gearbox includes a gearbox 1, and a base plate 2 fixedly connected to both sides of the bottom of the gearbox 1, with the top of the two base plates 2 slidably connected to the bottom of the gearbox 1.

[0024] Both sides of the gearbox 1 are fixedly connected to side frames 5. The inner sides of the two side frames 5 are provided with connecting plates 6. The top and bottom of the two connecting plates 6 are slidably connected to the top and bottom of the inner sides of the two side frames 5, respectively. The side of the two connecting plates 6 is fixedly connected to a sliding block 16. The two sliding blocks 16 are slidably connected to the side of the two side frames 5 through sliding grooves 7, respectively. The side of the two sliding blocks 16 is fixedly connected to a mounting plate 12. The bottom sides of the gearbox 1 are fixedly connected to sliders 3. The two sliders 3 are slidably connected to the top of the two base plates 2, respectively.

[0025] When installing the tractor gearbox, firstly, the gearbox 1 is placed in the designated installation area. Then, the base plate 2, which is fixed to both sides of the bottom of the gearbox 1, is initially connected and fixed to the tractor frame or mounting base with bolts, achieving basic support and positioning of the gearbox 1 in the longitudinal direction. At the same time, the side frames 5 located on both sides of the gearbox 1 form a lateral adjustment mechanism through the connecting plate 6 and sliding block 16 set on their inner sides. Specifically, the top and bottom of the connecting plate 6 respectively cooperate with the sliding structure inside the side frame 5, allowing the connecting plate 6 to slide vertically within the side frame 5. The sliding block 16 fixed on the outer side of the connecting plate 6 is embedded in the sliding groove 7 set on one side of the side frame 5, so that the sliding block 16 can move laterally along the extension direction of the sliding groove 7. The outer end of the sliding block 16 is fixed with a mounting plate 12, which is used to connect and fix with the corresponding mounting point on the tractor frame. After the initial fixing of the base plate 2 is completed, if it is necessary to make a fine adjustment to the position of the gearbox 1 to ensure that its input shaft is aligned with the engine If the coaxiality between the output shaft and the rear axle input shaft meets the assembly accuracy requirements, the connecting bolts between the mounting plate 12 and the frame can be loosened or removed. At this time, since the bottom plate 2 and the bottom of the gearbox 1 are slidably connected, and the bottom sides of the gearbox 1 are also equipped with sliders 3 that slide with the top of the bottom plate 2, the entire gearbox 1 can be slidably adjusted in a small range in the longitudinal direction on the support surface of the bottom plate 2, thereby achieving precise adjustment of the axial position. After the longitudinal adjustment is completed, the sliding block 16 is pushed to move along the sliding groove 7, which drives the connecting plate 6 and the mounting plate 12 to move in the lateral direction, thereby changing the connection position between the mounting plate 12 and the frame, and achieving fine adjustment of the lateral position. After the longitudinal and lateral positions of the gearbox 1 are adjusted to the correct position, the mounting plate 12 is fixed to the frame with bolts again, while ensuring that the connection of the bottom plate 2 is stable. Finally, the precise installation and positioning of the gearbox 1 is completed. This process is simple to operate, does not require repeated disassembly of the overall structure, and effectively improves the assembly efficiency and adjustment accuracy.

[0026] Furthermore, a support plate 13 is fixedly connected to one side of the bottom of the gearbox 1. Both sides of the support plate 13 are provided with insert rods 14, and one end of the insert rod 14 passes through the support plate 13 and one side of the base plate 2 in sequence. Several slots 15 are opened on one side of the slider 3 to cooperate with the insert rods 14. After the gearbox 1 completes the longitudinal position fine adjustment along the base plate 2, the insert rods 14 can be inserted into the through holes of the support plate 13 and the base plate 2 in sequence, and their ends can be embedded into the corresponding slots 15 on the side wall of the slider 3 to lock the current position of the slider 3, thereby fixing the adjustment position of the gearbox 1 in the longitudinal direction. This achieves the effect of providing reliable limit and positioning retention function after the longitudinal adjustment is completed, effectively preventing the gearbox from shifting due to vibration or external force during subsequent fixing or operation, and improving the stability and connection reliability after adjustment.

[0027] Furthermore, protrusions 8 are fixedly connected to the top and bottom of both connecting plates 6, and the four protrusions 8 are slidably connected to the top and bottom of the two side frames 5 respectively through movable grooves 9. The protrusions 8 are embedded in the movable grooves 9 and slide along their length, which guides and supports the vertical movement of the connecting plates 6, restricts their movement trajectory, and prevents the connecting plates 6 from deflecting or getting stuck during sliding. This achieves the effect of enhancing the smoothness of the lateral adjustment mechanism and the guiding accuracy, ensuring the stability and consistency of the sliding block 16 and the mounting plate 12 during lateral movement, and improving the smoothness and controllability of the overall adjustment process.

[0028] Furthermore, each of the two side frames 5 has a top plate 10 on one side, and the bottom of each top plate 10 is fixedly connected to the top of two of the four protrusions 8. Each of the top plates 10 has a threaded rod 11 on its top, and the bottom end of the threaded rod 11 passes through the top plate 10 and the top of the side frame 5 in sequence through the threaded groove. After the connecting plate 6 completes the vertical position adjustment in the movable groove 9 through the protrusion 8, the threaded rod 11 can be rotated to screw it into the threaded groove and press against the top of the protrusion 8, thereby pressing and fixing the protrusion 8 in the current position, realizing the locking of the vertical position of the connecting plate 6, achieving the effect of adjustable and fixed height of the connecting plate 6, further enhancing the flexibility and applicability of the horizontal adjustment mechanism, enabling it to adapt to different installation height requirements and maintain a stable state after adjustment.

[0029] Furthermore, each of the two base plates 2 has a groove 4 on its top, and the two sliders 3 are slidably connected to the top of the two base plates 2 through the groove 4 respectively. The sliders 3 are embedded in the groove 4 and slide along its extension direction, providing a clear guide path for the longitudinal movement of the gearbox 1 on the base plate 2, making the sliding process smoother and the direction controllable, thus achieving the effect of improving the longitudinal sliding guidance accuracy and structural stability. At the same time, the groove 4, as a structure integrated on the base plate 2, simplifies the assembly process and enhances the compactness and reliability of the overall structure.

[0030] Furthermore, the two sliders 3 are respectively fitted with the two grooves 4 with clearance. While ensuring that the sliders 3 can slide freely in the grooves 4, the appropriate clearance is reserved to effectively absorb manufacturing errors, assembly deviations and dimensional changes caused by thermal expansion and contraction of materials. This avoids jamming or stress concentration caused by excessive tightness, thus achieving the effect of improving structural adaptability and assembly fault tolerance while ensuring smooth sliding. This is conducive to improving the overall stability and service life of the device under complex working conditions.

[0031] In summary:

[0032] First, the gearbox 1 is placed in the predetermined installation position. Then, the base plates 2, which are fixed to both sides of the bottom of the gearbox 1, are initially connected and fixed to the tractor frame or mounting base using bolts, thus achieving basic support and positioning of the gearbox 1 in the longitudinal direction. At this time, since sliders 3 are fixedly connected to both sides of the bottom of the gearbox 1, and grooves 4 are opened on the top of both base plates 2, the sliders 3 are embedded in the grooves 4 and form a sliding fit, allowing the gearbox 1 to slide longitudinally along the extension direction of the grooves 4 on the top of the base plates 2. At the same time, connecting plates 6 are provided inside the side frames 5 on both sides of the gearbox 1. The top and bottom of the connecting plates 6 are respectively fixed with protrusions 8, which are embedded in the side frames 5. The connecting plate 6 is guided to move vertically within the side frame 5 by sliding along the length of the movable groove 9 set at the top and bottom of the inner side of the frame 5. A sliding block 16 is fixedly connected to one side of the connecting plate 6. The sliding block 16 is slidably connected to one side of the side frame 5 through the sliding groove 7. A mounting plate 12 is fixed to the outer end of the sliding block 16 for connection with the mounting point on the frame. When it is necessary to make a fine adjustment to the position of the gearbox 1 to ensure that the coaxiality between the input shaft and the engine output shaft, and between the output shaft and the rear axle input shaft meets the assembly accuracy, the connecting bolts between the mounting plate 12 and the frame can be loosened first. At this time, by pushing the gearbox 1 body, the slider 3 at its bottom slides along the sliding groove 4 on the bottom plate 2 to achieve the desired movement. After precise adjustment of the longitudinal position, the insert rod 14 is inserted from both sides of the support plate 13, with one end passing through the side wall through holes of the support plate 13 and the base plate 2, and finally embedding into the corresponding position in the multiple slots 15 opened on the side wall of the slider 3, thereby locking the slider 3 in the current sliding position and achieving reliable fixation after longitudinal adjustment. After completing the longitudinal adjustment and locking, if fine adjustment of the lateral position is still required, the slider block 16 can be pushed to move along the sliding groove 7, causing the connecting plate 6 to slide up and down within the side frame 5, thereby changing the spatial position of the mounting plate 12 and achieving displacement adjustment of the lateral mounting point. During the adjustment process, the sliding of the protrusion 8 within the movable groove 9 ensures the stability of the connecting plate. 6. The smoothness of movement and the accuracy of the trajectory are ensured to avoid deflection or jamming. Furthermore, after the vertical position of the connecting plate 6 is adjusted, the threaded rod 11 set on the top of the side frame 5 can be rotated to screw it into the top of the top plate 10 and pass through the threaded groove to the top of the side frame 5. The bottom end of the threaded rod 11 gradually presses against the top of the protrusion 8 located directly below it, thereby pressing and fixing the protrusion 8 in its current position in the movable groove 9, thereby locking the vertical position of the connecting plate 6 and ensuring that the lateral adjustment mechanism remains stable and does not shift after adjustment. After the longitudinal and lateral positions are accurately adjusted and locked, the mounting plate 12 is fixed to the frame with bolts to complete the installation and positioning of the entire gearbox 1.This structure solves the problem of longitudinal fine-tuning that traditional rigid installations cannot perform by sliding the base plate 2 and slider 3 within the slide groove 4, improving axial alignment accuracy and reducing vibration and wear caused by poor coaxiality. The cooperation of the side frame 5, connecting plate 6, sliding block 16, sliding groove 7, and mounting plate 12 enables lateral adjustment of the installation position, enhancing installation flexibility and adaptability. The cooperation of the support plate 13 with the insertion rod 14 and slot 15 provides a locking function after longitudinal adjustment, improving stability. The cooperation of the protrusion 8 with the movable groove 9 enhances the guidance and smoothness of the connecting plate 6's movement. The cooperation of the top plate 10 with the threaded rod 11 and threaded groove enables adjustable and locked height of the connecting plate 6, improving the controllability and applicability of the adjustment mechanism. The clearance fit design between the slider 3 and the slide groove 4 effectively absorbs manufacturing and assembly errors, avoiding jamming caused by thermal expansion and contraction or minor deformation, thus improving the structure's fault tolerance and operational reliability.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A tractor gearbox, comprising a gearbox, characterized in that, It also includes base plates fixedly connected to both sides of the bottom of the gearbox, and the top of the two base plates are slidably connected to the bottom of the gearbox. Both sides of the gearbox are fixedly connected to side frames. The inner sides of the two side frames are provided with connecting plates, and the top and bottom of the two connecting plates are slidably connected to the top and bottom of the inner sides of the two side frames, respectively. One side of each of the two connecting plates is fixedly connected to a sliding block, and the two sliding blocks are slidably connected to one side of each of the two side frames through sliding grooves. One side of each of the two sliding blocks is fixedly connected to a mounting plate. The bottom sides of the gearbox are fixedly connected to sliders, and the two sliders are slidably connected to the top of each of the two base plates, respectively.

2. A tractor gearbox as described in claim 1, characterized in that, A support plate is fixedly connected to one side of the bottom of the gearbox. Insert rods are provided on both sides of the support plate, and one end of the insert rod passes through one side of the support plate and the bottom plate in sequence. Several slots are provided on one side of the slider to cooperate with the insert rods.

3. A tractor gearbox as described in claim 1, characterized in that, Both of the connecting plates are fixedly connected to the top and bottom with protrusions, and the four protrusions are slidably connected to the top and bottom of the two side frames respectively through movable grooves.

4. A tractor gearbox as described in claim 3, characterized in that, Each of the two side frames has a top plate on one side, and the bottom of the two top plates is fixedly connected to the top of two of the four protrusions respectively. Each of the two top plates has a threaded rod on its top, and the bottom end of the threaded rod passes through the top of the top plate and the top of the side frame in sequence through a threaded groove.

5. A tractor gearbox as described in claim 1, characterized in that, Both base plates have grooves on their tops, and both sliders are slidably connected to the tops of the two base plates through the grooves.

6. A tractor gearbox as described in claim 5, characterized in that, Both sliders are clearance-fitted with the two grooves respectively.

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