Tractor transmission box body with double-supporting structure

Abstract

The utility model relates to the technical field of mechanical transmission, in particular to a tractor transmission box body with a double-supporting structure. Comprising a left side wall, a right side wall, a rear side wall and a bottom shell, the left side wall and the right side wall are arranged in parallel, the rear side wall and the bottom shell are fixedly connected between the left side wall and the right side wall, a left shaft hole used for installing a left half shaft is formed in the left side wall, and a right shaft hole used for installing a right half shaft is formed in the right side wall; an inner supporting body used for supporting the inner end of a half shaft is arranged between the left side wall and the right side wall and comprises a left supporting plate and a right supporting plate which are arranged in parallel, a left shaft inner hole used for supporting a left half shaft is formed in the left supporting plate, and a right shaft inner hole used for supporting a right half shaft is formed in the right supporting plate. The tractor transmission box body can support the transmission shaft at two points, the stability and concentricity of the transmission shaft are greatly improved, the transmission shaft is stable in operation and small in operation resistance when rotating, abrasion can be effectively relieved, and shaft breakage faults are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mechanical drive, concretely is a tractor transmission box with double support structure. BACKGROUND

[0002] The tractor transmission box supports various transmission shafts such as the driving shaft, the left half shaft and the right half shaft through the through holes on the side walls. For example, another Chinese patent 2024215482449 applied by the inventor discloses a tractor transmission box with rear-mounted main and auxiliary shift levers, and the announcement number is CN222185747U. The tractor transmission box comprises a transmission box shell, an I shaft and a II shaft installed in the transmission box shell through bearings, and the II shaft is parallel to the I shaft and is in transmission connection with the I shaft through a transmission gear. The I shaft is a power input shaft, and the rear end of the II shaft extends into a rear box body and is in transmission connection with an output transmission gear installed in the rear box body. The output transmission gear transmits the power of the II shaft to the tractor walking wheels through the left and right half shafts to drive the rotation of the tractor walking wheels. Alternatively, the output transmission gear can also transmit the power to the rear power output shaft of the tractor to drive the work of agricultural implements such as rotary cultivators. The left and right half shafts are respectively supported on the left and right side walls of the rear box body through bearings, and the rear power output shaft is supported on the rear side wall of the rear box body through a bearing. The thin-walled structure of the rear box body can only provide a support point for each transmission shaft. However, the transmission box of a large horse power is large in size, and the internal span of the box body is also large. The distance between the transmission gear and the support point of the side wall of the box body is far, the transmission shaft supported by a single point shakes severely in the radial direction during high-speed operation, the running resistance is large, and the shaft breakage accident is prone to occur. SUMMARY

[0003] The utility model discloses a tractor transmission box with double support structure capable of achieving two-point support for transmission shafts to achieve the purposes of stable operation of transmission shafts, small running resistance and reduction of shaft breakage accidents.

[0004] The utility model discloses a tractor transmission box with double support structure capable of achieving two-point support for transmission shafts to achieve the purposes of stable operation of transmission shafts, small running resistance and reduction of shaft breakage accidents.

[0005] The utility model discloses a tractor transmission box with double support structure, including parallelly arranged left side wall, right side wall, fixed connection in between left side wall and right side wall's rear side wall and bottom shell, be provided with left axle hole for installing left half shaft on left side wall, be provided with right axle hole for installing right half shaft on right side wall, left axle hole and right axle hole coaxial arrangement, be provided with inner support body for supporting half shaft inner end between left side wall and right side wall, the inner support body includes parallelly arranged left support plate and right support plate, be provided with left axle inner hole for supporting left half shaft on left support plate, be provided with right axle inner hole for supporting right half shaft on right support plate.

[0006] Through the scheme, the tractor transmission box can realize two-point support for the transmission shaft, the transmission shaft runs stably and has small running resistance, and the shaft breakage failure can be effectively reduced.

[0007] Preferably, the lower ends of the left support plate and the right support plate are fixedly connected to the bottom shell.

[0008] Through the scheme, the inner support body structure is firm and low in production cost, and is convenient for processing and production.

[0009] Preferably, the front ends of the left support plate and the right support plate are fixedly provided with front wall plates, and the rear ends are fixedly provided with rear wall plates.

[0010] Through the scheme, the two support plates and the two wall plates jointly form a rectangular frame structure which is stable in structure.

[0011] Preferably, the rear side wall is provided with a rear shaft hole for mounting a rear power output shaft, and the rear wall plate is provided with a rear inner shaft hole corresponding to the rear shaft hole and used for supporting the rear power output shaft.

[0012] Through the scheme, two-point support is realized for the rear power output shaft, the rear power output shaft runs stably and has small running resistance.

[0013] Preferably, the inner support body and the bottom shell are integrated.

[0014] Through the scheme, the inner support body structure is firm.

[0015] Preferably, the front ends of the left side wall and the right side wall are fixedly provided with front box bodies for mounting input shafts.

[0016] Through the scheme, the tractor transmission box is suitable for further improvement on a traditional box.

[0017] Thanks to the above structure, the tractor transmission box can realize two-point support for the transmission shaft, the stability and concentricity of the transmission shaft are greatly improved, the transmission shaft runs stably and has small running resistance when rotating, and the wear and the shaft breakage failure can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a partial sectional view of an embodiment of the utility model.

[0019] Figure 2 is a sectional view of an embodiment of the utility model.

[0020] Figure 3 is Figure 1 is a sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model makes further detailed description below combining with drawings. Same parts are indicated with same reference numerals in the drawings. It should be noted that, or the words "front", "back", "left", "right", "up" and "down" in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions away from the geometric center of a particular component.

[0022] As shown in Figure 1 , Figure 3 The utility model discloses a tractor transmission case with double support structure adopts casting process integral forming, including parallelly arranged left side wall 2, right side wall 1, fixedly connected between left side wall 2 and right side wall 1's rear side wall 3 and bottom shell 4, the front end of left side wall 2 and right side wall 1 is fixedly provided with the front box 9 for installing input shaft, and input shaft longitudinal setting installs in front box 9, and its rear end extends to the inner chamber between left side wall 2 and right side wall 1, drives relevant transmission gear rotation, of course, front box 9 is provided with gear shifting mechanism and clutch mechanism, and the meshing of different gears realizes gear shifting or clutch function, and the structure and working principle of this part are all prior art, and will not be described in detail here. Left side wall 2 is provided with left axle hole for installing left half shaft 22, right side wall 1 is provided with right axle hole 11 for installing right half shaft 12, left axle hole and right axle hole 11 are coaxially arranged and are respectively installed left half shaft 22 or right half shaft 12 through bearing, and the inner end of left half shaft 22 or right half shaft 12 is fixedly installed driven gear, and input shaft drives driven gear rotation through driving gear, to drive left half shaft 22 or right half shaft 12 rotation.

[0023] Left side wall 2 and right side wall 1 are provided with inner support body for supporting the inner end of half shaft, as shown in Figure 2 The inner support body includes parallelly arranged left support plate 5 and right support plate 6, and left support plate 5 and right support plate 6 are spaced apart from left side wall 2 and right side wall 1 by a certain distance, so that the driven gear on the left half shaft can be arranged in the gap between left side wall 2 and left support plate 5, or the driven gear on the right half shaft can be arranged in the gap between right side wall 1 and right support plate 6. Left support plate 5 is provided with left axle inner hole 51 for supporting left half shaft, and right support plate 6 is provided with right axle inner hole 61 for supporting right half shaft. Left axle inner hole 51 is coaxially arranged with left axle hole, and a bearing is arranged in left axle inner hole 51 to support the inner end of left half shaft 22. Right axle inner hole 61 is coaxially arranged with right axle hole 11, and a bearing is arranged in right axle inner hole 61 to support the inner end of right half shaft 12. In this way, left half shaft 22 and right half shaft 12 each have two bearings spaced apart by a certain distance, forming a double support structure, which can effectively reduce the radial runout amplitude of the half shaft during rotation, improve the stability of the half shaft, and reduce the motion resistance.

[0024] As Figure 2 shown, the left support plate 5 and the right support plate 6 are arranged at a distance apart in a flat plate structure, the front end of the left support plate 5 and the right support plate 6 is fixedly provided with a front wall 7, and the rear end is fixedly provided with a rear wall 8, the front wall 7 and the rear wall 8 are integrally formed with the left support plate 5 and the right support plate 6, and together constitute a stable rectangular frame structure, the lower end of the left support plate 5 and the right support plate 6 is fixedly connected to the bottom shell 4 and integrally formed with the bottom shell 4, so that the inner support body and the bottom shell 4 become an integrated structure.

[0025] As a further improvement of the utility model, as Figures 1-3 shown, the rear side wall 3 is provided with a rear shaft hole 31 for mounting the rear power output shaft, and the rear wall 8 is provided with a rear inner shaft hole 81 corresponding to the rear shaft hole 31 for supporting the rear power output shaft. The rear wall 8 and the rear side wall 3 are arranged parallel to each other and spaced apart at a distance, in order to further improve the stability of the rear wall 8, a connecting rod 82 is arranged between the upper end of the rear wall 8 and the rear side wall 3, one end of the connecting rod 82 is integrated with the rear wall 8, and the other end is integrated with the rear side wall 3, which can effectively improve the stability of the upper end of the rear wall 8. The rear inner shaft hole 81 and the rear shaft hole 31 are coaxially arranged, and in use, bearings are respectively installed in the rear inner shaft hole 81 and the rear shaft hole 31, and the power output shaft is simultaneously installed in the rear inner shaft hole 81 and the rear shaft hole 31, forming a double support structure for the power output shaft, and the power output shaft is used to drive the agricultural implement working outside the tractor. In order to adapt to the requirements of the working state of the external agricultural implement and realize the speed reduction output of the rear power, two mutually parallel power output shafts can be used, one of which is a driving shaft and the other is a driven shaft, and the two are connected by a constant meshing gear. As a specific embodiment of the utility model, two rear inner shaft holes 81 are arranged on the rear wall 8, and two rear shaft holes 31 are arranged on the rear side wall 3, one group of rear inner shaft holes 81 and rear shaft holes 31 are installed with the driving shaft of the power output shaft, and the other group is installed with the driven shaft. The rear power output gear drives the driving shaft of the power output shaft to rotate, and the driving shaft drives the driven shaft to rotate through the constant meshing gear. Of course, as other embodiments of the utility model, other transmission connection methods can also be used to output power to the rear end of the box body through the transmission shaft installed in the rear inner shaft hole 81 and the rear shaft hole 31. For example, without the need for speed reduction of the rear power output, only one group of rear inner shaft holes 81 and rear shaft holes 31 can be arranged, and only one power output shaft can be used to output power.

[0026] Although some specific embodiments of the present application have been described in detail above by way of example, it will be appreciated that the examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above-described embodiments without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A tractor transmission case with double support structure, comprising left side wall (2), right side wall (1) arranged in parallel, rear side wall (3) and bottom shell (4) fixedly connected between the left side wall (2) and the right side wall (1), the left side wall (2) is provided with a left shaft hole for mounting a left half shaft, the right side wall (1) is provided with a right shaft hole (11) for mounting a right half shaft, the left shaft hole and the right shaft hole (11) are coaxially arranged, characterized in that: An inner support body for supporting inner ends of half shafts is arranged between the left side wall (2) and the right side wall (1), and comprises left and right support plates (5, 6) arranged in parallel, the left support plate (5) being provided with a left inner shaft hole (51) for supporting a left half shaft, and the right support plate (6) being provided with a right inner shaft hole (61) for supporting a right half shaft.

2. The tractor transmission case with a double support structure according to claim 1, characterized in that, Lower ends of the left and right support plates (5, 6) are fixedly connected to the bottom shell (4).

3. The tractor transmission case with double support structure according to claim 1 or 2, characterized in that: Front ends of the left and right support plates (5, 6) are fixedly provided with front baffle plates (7), and rear ends thereof are fixedly provided with rear baffle plates (8).

4. The tractor transmission case with a double support structure according to claim 3, characterized in that: The rear side wall (3) is provided with a rear shaft hole (31) for mounting a rear power output shaft, and the rear baffle plate (8) is provided with a rear inner shaft hole (81) corresponding to the rear shaft hole (31) for supporting the rear power output shaft.

5. The tractor transmission case with double support structure according to claim 1 or 2, characterized in that: The inner support body and the bottom shell (4) are of an integrated structure.

6. The tractor transmission case with double support structure according to claim 1 or 2, characterized in that: Front ends of the left and right side walls (2, 1) are fixedly provided with front box bodies (9) for mounting input shafts.

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