Traction frame of small tractor

Abstract

The utility model belongs to the technical field of tractors, and particularly relates to a small tractor traction frame which comprises a small tractor gearbox, a small tractor rear axle arranged on the small tractor gearbox, a traction frame body arranged on the rear side of the small tractor rear axle, and the small tractor rear axle comprises a left half shaft shell and a right half shaft shell which are arranged on the two sides of the small tractor gearbox respectively. A rear transmission shaft is led out of the rear side of the small towing gearbox, traction frame connecting seats are arranged on the rear side of the left half shaft shell and the rear side of the right half shaft shell respectively, each traction frame connecting seat comprises a first vertical rib plate and a second vertical rib plate, and due to the fact that the lower portions of the first vertical rib plates and the lower portions of the second vertical rib plates extend downwards to the position below the bottom face of the left half shaft shell, the traction frame connecting seats can be connected with the left half shaft shell and the right half shaft shell. In this way, the first screw hole can be arranged downwards relative to the small tractor rear axle, the traction frame connected with the traction frame connecting base and the rear transmission shaft are vertically spaced behind the small tractor gearbox and do not interfere with each other in the spatial position, and therefore the traction frame and the rear transmission shaft can be installed on the rear side of the small tractor at the same time and are convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of tractor technology, specifically relating to a small tractor towing frame. Background Technology

[0002] Small tractors are widely used in agriculture, forestry, and landscaping. In practice, they are typically used as a power source to tow other equipment. For example, a trailer attached to the rear of a small tractor can be used for transport; a rotary tiller can be installed, turning it into a tiller; and a posthole digger can be installed, making it a posthole digger. Therefore, small tractors usually have a drawbar and an output shaft at the rear. The drawbar connects to the trailer and other equipment, while the output shaft provides power to the rotary tiller, posthole digger, etc. One current problem with small tractors is that the driveshaft and drawbar can only be used interchangeably. Using the driveshaft requires removing the drawbar, and vice versa, making operation inconvenient for users. Utility Model Content

[0003] The present invention aims to provide a small tractor towing frame, which enables the rear drive shaft and towing frame of a small tractor to be used simultaneously, saving users the trouble of disassembly and assembly, and making the operation of the user worry-free and labor-saving.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A small tractor towing frame is provided, including a small tractor gearbox, a small tractor rear axle on the small tractor gearbox, and a towing frame on the rear side of the small tractor rear axle. The small tractor rear axle includes a left half-shaft housing and a right half-shaft housing respectively disposed on both sides of the small tractor gearbox. A rear drive shaft extends from the rear side of the small tractor gearbox. Towing frame connecting seats are respectively provided on the rear sides of the left half-shaft housing and the right half-shaft housing. The towing frame connecting seat includes a first vertical rib plate and a second vertical rib plate spaced apart from each other. The lower parts of the first vertical rib plate and the second vertical rib plate extend downward to below the bottom surface of the left half-shaft housing or the right half-shaft housing. A first screw hole for connecting the towing frame is provided at the middle and bottom of the first vertical rib plate and the second vertical rib plate. The towing frame is provided with a corresponding second screw hole. The towing frame is bolted to the towing frame connecting seat, so that the towing frame and the rear drive shaft are vertically spaced apart behind the small tractor gearbox.

[0006] Preferably, the left and right half-shaft housings are square, and the interior of the left and right half-shaft housings is a square half-shaft hole, with reinforcing ribs extending to the left and right respectively provided on the inner walls of the four sides of the half-shaft hole.

[0007] Preferably, the traction frame includes a main traction plate, the main traction plate includes a rear plate portion, the left and right ends of the rear plate portion are provided with forward-extending inclined plate portions, the front end of the inclined plate portion is provided with an outward-extending connecting plate portion, the second screw hole is provided on the connecting plate portion, and a first lug is provided at the middle position of the rear side of the rear plate portion; the main traction plate is a vertical flat plate, and a first reinforcing rib is provided along the outer side of the main traction plate, the first reinforcing rib being widened at the corner of the inclined plate portion and the connecting plate portion; a second reinforcing rib is provided at the inner position of the corner between the inclined plate portion and the rear plate portion on the left and right sides; the first reinforcing rib and the second reinforcing rib are horizontal flat plates.

[0008] Preferably, the rear side of the small tractor gearbox is provided with a support plate, and a second lug is provided at the bottom of the support plate.

[0009] Preferably, the second vertical rib is located near the flange of the left or right half-shaft housing, and a flange reinforcing rib is provided between the second vertical rib and the corresponding flange.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The small trailer towing frame includes a small trailer gearbox, a small trailer rear axle is provided on the small trailer gearbox, and a towing frame is provided on the rear side of the small trailer rear axle. The small trailer rear axle includes a left half-shaft housing and a right half-shaft housing respectively provided on both sides of the small trailer gearbox. A rear drive shaft is led out from the rear side of the small trailer gearbox. Towing frame connecting seats are respectively provided on the rear sides of the left half-shaft housing and the right half-shaft housing. The towing frame connecting seat includes a first vertical rib plate and a second vertical rib plate arranged at intervals on the left and right sides. The lower parts of the first vertical rib plate and the second vertical rib plate extend downward to below the bottom surface of the left half-shaft housing or the right half-shaft housing. Each vertical rib has a first screw hole for connecting the drawbar at its center and bottom. The drawbar has a corresponding second screw hole. Since the lower parts of the first and second vertical ribs extend downwards to below the bottom surface of the left half-shaft housing, the first screw holes can be positioned downwards relative to the small tractor's rear axle. This allows the drawbar and rear drive shaft connected to the drawbar connecting seat to be vertically spaced behind the small tractor's gearbox, preventing spatial interference. This allows the drawbar and rear drive shaft to be installed simultaneously on the rear side of the small tractor. When using the rear drive shaft, the drawbar does not need to be removed, and vice versa, making it convenient to use. 2. Designing the drawbar connecting seat with the first and second vertical ribs spaced left and right provides sufficient connection points for the drawbar while reducing the weight of the rear axle. The reinforcing ribs inside the left and right half-shaft housings, along with the rear flange reinforcing ribs, ensure the strength of the rear axle, meeting the strength requirements for simultaneous use of the drawbar and rear output shaft. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a side view of an embodiment of the small tractor traction frame of this utility model.

[0013] Figure 2 This is a top view of an embodiment of the small tractor traction frame of this utility model.

[0014] Figure 3 This is a front view of an embodiment of the small tractor traction frame of this utility model.

[0015] Figure 4 This is a front view of the left half-shaft housing in one embodiment of the small tractor traction frame of this utility model.

[0016] Figure 5 for Figure 4 A cross-sectional view of JJ.

[0017] Figure 6 This is a top view of the left half-shaft housing in one embodiment of the small tractor traction frame of this utility model.

[0018] In the diagram, the labels represent: 1. Small tractor gearbox; 2. Left half-shaft housing; 21. Flange; 3. Right half-shaft housing; 4. Traction frame; 41. Second screw hole; 42. Main traction plate; 421. Rear plate; 422. Inclined plate; 423. Connecting plate; 43. First lug; 44. First reinforcing rib; 45. Second reinforcing rib; 5. Rear drive shaft; 6. Traction frame connecting seat; 61. First vertical rib; 62. Second vertical rib; 63. First screw hole; 64. Flange reinforcing rib; 7. Reinforcing rib; 8. Support plate; 81. Detailed Implementation

[0019] 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.

[0020] In one embodiment, a small trailer tow rack is provided for use on a small tractor, such as... Figure 1-3As shown, the small tractor drawbar includes a small tractor gearbox 1, which connects to the engine of a small tractor. A small tractor rear axle is mounted on the gearbox 1. The rear axle includes a left half-shaft housing 2 and a right half-shaft housing 3, respectively located on either side of the gearbox 1. The left and right half-shafts of the differential are installed inside the left and right half-shafts, respectively, driving the two wheels on the left and right sides of the small tractor. A drawbar 4 is located behind the rear axle, allowing the small tractor to tow vehicles such as trailers and sleds. A rear driveshaft 5 extends from the rear of the gearbox 1. The rear driveshaft 5 is used to output a portion of the power from the small tractor's engine via the gearbox 1. For example, the power output from the rear driveshaft 5 can drive agricultural or construction equipment such as rotary tillers or posthole diggers via a cross coupling.

[0021] Traction frame connecting seats 6 are respectively provided on the rear side of the left half-shaft housing 2 and the right half-shaft housing 3, combined with Figure 4-6 As shown, taking the traction frame connecting seat 6 on the rear side of the left half-shaft housing 2 as an example, it includes a first vertical rib 61 and a second vertical rib 62 spaced apart on the left and right sides. The first vertical rib 61 and the second vertical rib 62 are integrally formed with the left half-shaft housing 2. By spaced apart the first vertical rib 61 and the second vertical rib 62, it is beneficial to reduce weight and provides two different connection positions. The lower parts of the first vertical rib 61 and the second vertical rib 62 extend downward to below the bottom surface of the left half-shaft housing 2. A first screw hole 63 for connecting the traction frame is provided in the middle and at the bottom of the first vertical rib 61 and the second vertical rib 62, respectively. The traction frame 4 is provided with a corresponding screw hole 63. The second screw hole 41 connects the towing frame 4 to the towing frame connecting seat 6 via bolts. Since the lower parts of the first vertical rib plate 61 and the second vertical rib plate 62 extend downward to the bottom surface of the left half-shaft housing 2, the first screw hole 63 can be arranged downward relative to the rear axle of the small tractor. This allows the towing frame 4 connected to the towing frame connecting seat 6 and the rear drive shaft 5 to be spaced apart vertically behind the small tractor gearbox 1, so that the two will not interfere with each other in space. Thus, the towing frame 4 and the rear drive shaft 5 can be installed simultaneously on the rear side of the small tractor. When using the rear drive shaft 5, it is not necessary to remove the towing frame 4, and when using the towing frame 4, it is not necessary to remove the rear drive shaft 5, which is more convenient to use.

[0022] The rear drive shaft 5 and the towing frame 4 on this small tractor can be installed simultaneously without interfering with each other. Users do not need to remove the towing frame when using the rear drive shaft, nor do they need to remove the rear drive shaft when using the towing frame, saving time and effort. The left half-shaft housing 2, the right half-shaft housing 3, and the towing frame connecting seat 6 on their respective rear sides are integrally cast, resulting in high overall structural strength.

[0023] Furthermore, in another embodiment, such as Figure 1-6As shown, the left half-shaft housing 2 and right half-shaft housing 3 of this small tractor are square. Compared to other shapes such as circles, designing the left half-shaft housing 2 and right half-shaft housing 3 as square facilitates the arrangement of the tractor connecting seat 6 on the rear side. The interior of the left half-shaft housing 2 and right half-shaft housing 3 is a square half-shaft hole, and reinforcing ribs 7 extending to the left and right are respectively provided in the middle of the four inner walls of the half-shaft hole. Figure 5 As shown, the reinforcing rib 7 on the inner wall of the half-shaft hole of the left half-shaft housing 2 is integrally formed with it. By setting the reinforcing rib 7, the axial strength of the left half-shaft housing 2 can be improved.

[0024] Furthermore, in another embodiment, such as Figure 1-6 As shown, the towing frame 4 in the small trailer towing frame includes a main towing plate 42, which includes a rear plate portion 421. The left and right ends of the rear plate portion 421 are provided with forward-extending inclined plate portions 422. The front end of the inclined plate portion 422 is provided with an outward-extending connecting plate portion 423. A second screw hole 41 is provided on the connecting plate portion 423. A first ear seat 43 is provided in the middle of the rear side of the rear plate portion 421. The first ear seat 43 can be used to connect equipment such as carriages. Compared with the current Y-shaped towing frame, the towing frame 4 of this shape in this embodiment can shorten the length and has a more compact structure, reducing the space occupied on the rear side when installed on the rear side of the small trailer axle. The main traction plate 42 is a vertical flat plate. A first reinforcing rib 44 is provided along the outer side of the main traction plate 42. The first reinforcing rib 44 is widened at the corner between the inclined plate portion 422 and the connecting plate portion 423. A second reinforcing rib 45 is provided on the inner side of the corner between the inclined plate portion 422 and the rear plate portion 421 on the left and right sides, respectively. The first reinforcing rib 44 and the second reinforcing rib 45 are horizontal flat plates. By setting the reinforcing ribs, the strength of the traction frame 4 can be improved.

[0025] Furthermore, in another embodiment, such as Figure 1-3 As shown, the small tractor towing frame has a support plate 8 on the rear side of the small tractor gearbox 1, and a second ear seat 81 at the bottom of the support plate 8. The second ear seat 81 can be used to install hydraulic cylinders to support equipment such as rotary tillers on the rear side of the small tractor.

[0026] Furthermore, in another embodiment, such as Figure 1-6 As shown, the second vertical rib 62 of the left half-shaft housing 2 of the small tractor is located near the flange 21 on its outer side. A flange reinforcing rib 64 is provided between the second vertical rib 62 and the flange 21 to improve the strength of the right half-shaft housing 2 and the flange 21. Similarly, a flange reinforcing rib is also provided on the right half-shaft housing.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] 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 small tow traction frame, characterized in that: The device includes a small tractor gearbox, a small tractor rear axle, and a towing frame on the rear side of the small tractor rear axle. The small tractor rear axle includes a left half-shaft housing and a right half-shaft housing respectively disposed on both sides of the small tractor gearbox. A rear drive shaft extends from the rear side of the small tractor gearbox. Towing frame connecting seats are respectively provided on the rear sides of the left half-shaft housing and the right half-shaft housing. The towing frame connecting seat includes a first vertical rib and a second vertical rib spaced apart from each other. The lower parts of the first vertical rib and the second vertical rib extend downward to below the bottom surface of the left half-shaft housing or the right half-shaft housing. A first screw hole for connecting the towing frame is provided in the middle and at the bottom of the first vertical rib and the second vertical rib. The towing frame is provided with a corresponding second screw hole. The towing frame is bolted to the towing frame connecting seat, so that the towing frame and the rear drive shaft are vertically spaced apart behind the small tractor gearbox.

2. The small tractor frame according to claim 1, characterized in that: The left and right half-shaft housings are square, and the interior of the left and right half-shaft housings is a square half-shaft hole. Reinforcing ribs extending to the left and right are respectively provided on the inner walls of the four sides of the half-shaft hole.

3. The small tractor frame according to claim 1, characterized in that: The traction frame includes a main traction plate, which includes a rear plate portion. The left and right ends of the rear plate portion are provided with forward-extending inclined plate portions, and the front end of the inclined plate portion is provided with an outward-extending connecting plate portion. The second screw hole is provided on the connecting plate portion, and a first lug is provided at the middle position of the rear side of the rear plate portion. The main traction plate is a vertical flat plate, and a first reinforcing rib is provided along the outer side of the main traction plate. The first reinforcing rib is widened at the corner of the inclined plate portion and the connecting plate portion. A second reinforcing rib is provided on the inner side of the corner between the inclined plate portion and the rear plate portion on the left and right sides. The first and second reinforcing ribs are horizontal flat plates.

4. The small tractor frame according to claim 1, characterized in that: The rear side of the small tractor gearbox is provided with a support plate, and a second ear seat is provided at the bottom of the support plate.

5. The small tractor frame according to claim 1, characterized in that: The second vertical rib is located near the flange of the left or right half-shaft housing, and a flange reinforcing rib is provided between the second vertical rib and the corresponding flange.

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