Heat treatment bending-resistant labor-saving lower pull rod for tractor

Abstract

The utility model relates to the technical field of tractor parts, in particular to a heat treatment bending-resistant labor-saving lower pull rod for a tractor, which comprises a rhombic plate-shaped lower pull rod body, a quick hook assembly is arranged at one end of the lower pull rod body, and a hinge joint assembly is arranged at the other end of the lower pull rod body. Groove combinations are symmetrically formed in the two side faces of the lower pull rod body, each groove combination comprises four long-strip-shaped grooves, the four grooves are formed in the extending directions of the four edges of the rhombus respectively, and the grooves divide the side faces of the lower pull rod body into a center cross reinforcing area and four edge reinforcing areas. The upper end, the lower end, the left end and the right end of the center cross-shaped reinforcing area are communicated with the ends of the adjacent edge reinforcing areas respectively, a small installation hole set and a large installation hole set are formed in the center cross-shaped reinforcing area in the length direction of the lower pull rod body at intervals, and the large installation hole set is close to one end of the quick hook assembly. The stress of the lower pull rod is small, the limiting rod is not prone to interference with a tire, and the service life of the lower pull rod is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor parts technical field especially relates to a heat treatment anti-bending labor-saving down rod for tractor. BACKGROUND

[0002] The commonly used down rod of large tractor is a forged down rod with variable cross section and thickness, which comprises a quick hitch assembly, a down rod body, a lock pin chain assembly and a hinge joint assembly. The down rod body is provided with a large mounting hole for mounting a lifting rod and a small mounting hole for mounting a limiting rod. The quick hitch assembly is used for mounting agricultural implements. The large mounting hole for mounting the lifting rod is located in the middle of the down rod body, and the small mounting hole is located at one end of the quick hitch assembly. Such mounting mode causes large stress on the lifting rod, and the limiting rod is prone to interfere with the tire. In addition, the existing down rod body is not strong enough and is prone to bending and deformation during heat treatment forging, which affects the service life. SUMMARY

[0003] The utility model provides a heat treatment anti-bending labor-saving down rod for tractor, which is not prone to bending and deformation during heat treatment, avoids interference between the limiting rod and the tire, and reduces the stress on the lifting rod.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a heat treatment anti-bending labor-saving down rod for tractor, comprising a rhombic plate-shaped down rod body, one end of the down rod body is provided with a quick hitch assembly, the other end of the down rod body is provided with a hinge joint assembly, two side surfaces of the down rod body are symmetrically provided with a groove combination, the groove combination comprises four long strip-shaped grooves, the four grooves are arranged along the extension direction of the four sides of the rhombus respectively, the grooves separate the side surface of the down rod body into a central cross reinforcement area and four edge reinforcement areas, the upper and lower left and right four ends of the central cross reinforcement area are respectively connected with the end part of the adjacent edge reinforcement area, a small mounting hole group and a large mounting hole group are arranged on the central cross reinforcement area along the length direction of the down rod body, the small mounting hole group is close to the middle part of the central cross reinforcement area, and the large mounting hole group is close to one end of the quick hitch assembly.

[0005] As a preferred technical scheme, the small mounting hole group comprises two small holes with equal diameters, and the small holes are used for mounting the limiting rod.

[0006] As a preferred technical scheme, the large mounting hole group comprises two large holes with equal diameters, and the large holes are used for mounting the lifting rod.

[0007] As a preferred technical scheme, the quick hook assembly is welded on the lower pull rod body, the thickness of the quick hook assembly is equal to the thickness of the lower pull rod body, and the quick hook assembly and the lower pull rod body are bent at an angle of 15°.

[0008] As a preferred technical scheme, the hinge joint assembly is welded on the lower pull rod body, the thickness of the hinge joint assembly is equal to the thickness of the lower pull rod body, the hinge joint assembly and the lower pull rod body are bent at an angle of 15°, and the bending direction of the hinge joint assembly is opposite to the bending direction of the quick hook assembly.

[0009] As a preferred technical scheme, the width of the groove near the center of the lower pull rod body is greater than the width of the groove near the end of the lower pull rod body, and both ends of the groove are arc-shaped.

[0010] As a preferred technical scheme, one side of the groove near the center of the lower pull rod body is parallel to the central axis of the lower pull rod body, and one side of the groove near the edge of the lower pull rod body is parallel to the edge line of the lower pull rod body.

[0011] Due to the adoption of the above technical scheme, the heat-treated anti-bending labor-saving lower pull rod for tractors comprises a rhombic plate-shaped lower pull rod body, a quick hook assembly is arranged at one end of the lower pull rod body, a hinge joint assembly is arranged at the other end of the lower pull rod body, and a groove combination is symmetrically arranged on both sides of the lower pull rod body, the groove combination comprises four long strip-shaped grooves, the four grooves are arranged along the extension directions of the four sides of the rhombus, the grooves divide the side surface of the lower pull rod body into a central cross-reinforced area and four edge-reinforced areas, the upper and lower left and right four ends of the central cross-reinforced area are respectively connected to the end portions of the adjacent edge-reinforced areas, small mounting hole groups and large mounting hole groups are arranged on the central cross-reinforced area along the length direction of the lower pull rod body, the small mounting hole groups are close to the middle part of the central cross-reinforced area, and the large mounting hole groups are close to one end of the quick hook assembly. Figure 5 and Figure 6 As shown in the prior art stress structure diagram, Figure 5 is the prior art stress structure diagram, Figure 6The stress structure schematic view is the stress structure schematic view of the present utility model, the installation position of the big mounting hole group, according to the lever principle, the stress of the lower pull rod is smaller, and the limiting rod is installed at the position of the small mounting hole group and is not easy to interfere with the tire, thereby enhancing the service life of the lower pull rod. BRIEF DESCRIPTION OF DRAWINGS

[0012] The following drawings are merely intended to illustrate and explain the present utility model and do not limit the scope of the present utility model. Among them:

[0013] Figure 1 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor;

[0014] Figure 2 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor; Figure 1 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor;

[0015] Figure 3 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor; Figure 2 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor;

[0016] Figure 4 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor; Figure 2 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor;

[0017] Figure 5 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor;

[0018] Figure 6 The stress structure schematic view is the stress structure schematic view of the present utility model for the heat treatment bending-resistant labor-saving lower pull rod of the tractor.

[0019] In the drawing: 1 - lower pull rod body; 11 - groove; 12 - central cross reinforcement area; 121 - small hole; 122 - big hole; 13 - edge reinforcement area; 2 - quick hitch assembly; 3 - hinged joint assembly. DETAILED DESCRIPTION

[0020] The present utility model is further described below in combination with the drawings and examples. In the following detailed description, only certain exemplary embodiments of the present utility model are described by way of illustration. It is needless to say that those skilled in the art can recognize that the described embodiments can be modified in various ways without departing from the spirit and scope of the present utility model. Therefore, the drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0021] As Figures 1 to 4As shown, the heat treatment anti-bending labor-saving down rod for tractor comprises a rhombic plate-shaped down rod body 1, one end of the down rod body 1 is provided with a quick hook assembly 2, the other end of the down rod body 1 is provided with a hinged joint assembly 3, two sides of the down rod body 1 are symmetrically provided with a groove combination, the groove combination comprises four long strip-shaped grooves 11, the four grooves 11 are arranged along the extending direction of the four sides of the rhombus respectively, the grooves 11 separate the side of the down rod body 1 into a central cross reinforced area 12 and four edge reinforced areas 13, the upper and lower left and right four ends of the central cross reinforced area 12 are respectively communicated with the end of the adjacent edge reinforced area 13, a small mounting hole group and a large mounting hole group are arranged on the central cross reinforced area 12 along the length direction of the down rod body 1, the small mounting hole group is close to the middle part of the central cross reinforced area 12, and the large mounting hole group is close to one end of the quick hook assembly 2; since the two sides of the down rod body 1 are respectively provided with the central cross reinforced area 12 and the four edge reinforced areas 13, and the upper and lower left and right four ends of the central cross reinforced area 12 are respectively communicated with the end of the adjacent edge reinforced area 13, therefore, the central reinforced structure and the edge reinforced structure of the down rod body 1 are connected together, and the anti-bending performance of the down rod body 1 is improved. Figure 5 and Figure 6 as shown, Figure 5 is a stress structure schematic view of the prior art, Figure 6 is a stress structure schematic view of the utility model, the installation position of the large mounting hole group of the utility model, according to the lever principle, the stress of the down rod is smaller, and the limiting rod is installed at the position of the small mounting hole group and is not easy to interfere with the tire, thereby enhancing the service life of the down rod.

[0022] as shown, Figures 1 to 4 the small mounting hole group comprises two small holes 121 with equal diameters, and the small holes 121 are used for installing limiting rods. The large mounting hole group comprises two large holes 122 with equal diameters, and the large holes 122 are used for installing lifting rods. The two large holes 122 are selected and installed in which large hole 122 according to the different lifting heights required by agricultural implements, and the two small holes 121 are set according to the installation requirements of the limiting rods. Figure 5 as shown, after the large hole 122 installs the lifting rod, the top of the lifting rod is connected with a lifting arm, and the lifting arm connection point is located directly above the large hole 122, when the agricultural implement applies a force F1=100N, the lifting rod applies a pulling force F2=200N to the down rod, so that the down rod bears a larger stress. Figure 6As shown, the utility model of big hole 122 moves to close to the one end of quick hitch assembly 2, the lifting arm connecting point is located in the oblique upper side of big hole 122, when the agricultural implement exerts F1=100N force, the tension F3=170N of lifting rod to lower drag link, therefore, the stress of lower drag link is reduced obviously, improves the service life.

[0023] As Figure 3 Shown, quick hitch assembly 2 is welded on lower drag link body 1, the thickness of quick hitch assembly 2 is equal to the thickness of lower drag link body 1, and the bending angle between quick hitch assembly 2 and lower drag link body 1 is 15°. The thickness of quick hitch assembly is equal to the thickness of lower drag link body, and the connecting surface is larger when welding, so the strength is stronger and it is not easy to bend. As Figure 3 Shown, ∠b is 15°, which is the preferred technical solution.

[0024] As Figure 3 Shown, hinge joint assembly 3 is welded on lower drag link body 1, the thickness of hinge joint assembly 3 is equal to the thickness of lower drag link body 1, and the bending angle between hinge joint assembly 3 and lower drag link body 1 is 15°, and the bending direction of hinge joint assembly 3 is opposite to that of quick hitch assembly 2. The thickness of hinge joint assembly 3 is equal to the thickness of lower drag link body 1, and the connecting surface is larger when welding, so the strength is stronger and it is not easy to bend. As Figure 3 Shown, ∠a is 15°, which is the preferred technical solution.

[0025] As Figure 1 And Figure 2 Shown, the width of groove 11 near the center of lower drag link body 1 is greater than that near the end of lower drag link body 1, and both ends of groove 11 are arc surfaces. Groove 11 is used to reduce the weight of lower drag link while ensuring the strength of lower drag link. Groove 11 does not interrupt the stress in the length direction of lower drag link, and the central cross reinforcement area 12 runs through the length direction of lower drag link, ensuring the consistency of the strength in the length direction of lower drag link and improving the service life. The end surface of groove 11 is an arc surface, which is not easy to form stress points.

[0026] As Figure 2 Shown, one side of groove 11 near the center of lower drag link body 1 is parallel to the central axis of lower drag link body 1, and the other side of groove 11 near the edge of lower drag link body 1 is parallel to the side line of lower drag link body 1. This arrangement of groove 11 not only facilitates processing, but also ensures the uniformity of the strength of lower drag link.

[0027] In the description of the utility model, need understanding is, the term "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the indicated device or element must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the limitation to the utility model.

[0028] The above only describes certain exemplary embodiments of the utility model through the way of illustration, needless to say, for ordinary skilled person in the art, can make the correction to the described embodiment in various different ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature, and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A heat treated bend resistant labor saving draw bar for tractors, characterized in that: The application relates to a drop bar body (1) in the shape of a rhombic plate, one end of the drop bar body (1) being provided with a quick hook assembly (2), the other end of the drop bar body (1) being provided with a hinged joint assembly (3), two sides of the drop bar body (1) being symmetrically provided with a groove combination, the groove combination comprising four long strip-shaped grooves (11), the four grooves (11) being arranged along the extending directions of the four sides of the rhombus respectively, the grooves (11) separating the side of the drop bar body (1) into a central cross-reinforced area (12) and four edge-reinforced areas (13), the upper and lower left and right ends of the central cross-reinforced area (12) being respectively connected with the end portions of the adjacent edge-reinforced areas (13), small mounting hole groups and large mounting hole groups being arranged on the central cross-reinforced area (12) along the length direction of the drop bar body (1), the small mounting hole groups being close to the middle part of the central cross-reinforced area (12), and the large mounting hole groups being close to one end of the quick hook assembly (2).

2. The heat treated bend-resistant labor-saving draw bar for tractors according to claim 1, characterized in that: The small mounting hole groups comprise two small holes (121) with equal diameters, and the small holes (121) are used for mounting limiting rods.

3. The heat treated bend-resistant labor-saving draw bar for tractors according to claim 1, characterized in that: The large mounting hole groups comprise two large holes (122) with equal diameters, and the large holes (122) are used for mounting lifting rods.

4. The heat treated bend-resistant labor-saving draw bar for tractors according to claim 1, characterized in that: The quick hook assembly (2) is welded on the drop bar body (1), the thickness of the quick hook assembly (2) is equal to the thickness of the drop bar body (1), and the quick hook assembly (2) and the drop bar body (1) are bent at an angle of 15 degrees.

5. The heat-treated, bend-resistant, labor-saving drawbar for a tractor as defined in claim 4, wherein: The hinged joint assembly (3) is welded on the drop bar body (1), the thickness of the hinged joint assembly (3) is equal to the thickness of the drop bar body (1), the hinged joint assembly (3) and the drop bar body (1) are bent at an angle of 15 degrees, and the bending direction of the hinged joint assembly (3) is opposite to the bending direction of the quick hook assembly (2).

6. The heat treated bend resistant labor saving draw bar for tractors as claimed in claim 1 wherein: The width of the groove (11) close to the center of the drop bar body (1) is greater than the width of the groove (11) close to the end of the drop bar body (1), and the two ends of the groove (11) are arc surfaces.

7. The heat-treated, bend-resistant, labor-saving draw bar for a tractor as set forth in claim 6, wherein: One side of the groove (11) close to the center of the drop bar body (1) is parallel to the central axis of the drop bar body (1), and one side of the groove (11) close to the edge of the drop bar body (1) is parallel to the side line of the drop bar body (1).

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