Tractor lower pull rod support structure

Abstract

A lower pull rod support structure of a tractor comprises a lower pull rod, a mounting seat and a pin shaft, the mounting seat is of a simply supported beam type, pull rod supports are symmetrically arranged at the two ends of the mounting seat, side battens are welded to the outer side faces of the pull rod supports, the lower pull rod is arranged on the pin shaft through a shaft sleeve, one end face of the pin shaft is welded to one end of each side batten, and the other end face of the pin shaft is welded to the other end of each side batten. A hole is formed in the other end of the side batten, the side batten is fixed to a screw hole formed in the outer side face of the pull rod support through a bolt and an elastic washer, a lining is arranged between the pin shaft and the inner cavity wall of the pull rod support, and a circle of installation holes are formed in the side face, in butt joint with the rear axle, of the installation base. The lower pull rod support is subjected to die opening again, a simply supported beam mode is adopted to replace an original lower pull rod rotating shaft penetrating through the whole support, the short pin shafts are adopted at the two ends of the whole mounting base to support the lower pull rod, and the strength of the pin shafts is greatly improved through supporting of the two ends.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor suspension, and particularly relates to a structure of a lower pull rod support of a tractor. Background Technique

[0002] The lower pull rod support of a tractor is mainly used to provide a rotating shaft point for the lower pull rod in the tractor suspension mechanism, so that the lower pull rod can rotate around the rotating shaft when the suspension mechanism works. In the existing structure of the tractor lower pull rod support, the lower pull rod support shaft passes through the lower pull rod support, and both ends of the lower pull rod are hinged to both ends of the lower pull rod support through nuts, washers and split pins, and then the shaft is locked on the lower pull rod through a set screw to prevent the shaft from rotating during work and aggravating the wear of the lower pull rod support.

[0003] In this existing structure, due to the large force on the lower pull rod, the set screw sometimes cannot effectively lock, which easily causes mutual wear between the lower pull rod support shaft and the lower pull rod support, and once worn, they must be replaced simultaneously, resulting in a high maintenance cost; since the rotating shaft runs through the entire lower pull rod support, the hollow structure in the middle is relatively large, reducing the torsional strength of the support; the lower pull rod is installed at the bottom of the rear axle by a bolt and spring washer structure, and it is easy to loosen when the working load is large, causing damage to parts. Therefore, it is necessary to design a structure of a tractor lower pull rod support to solve the above problems. Content of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the purpose of the utility model is to provide a structure of a tractor lower pull rod support to solve the problems that the shaft for supporting the lower pull rod does not need to be replaced simultaneously with the support after wear, and to improve the torsional strength of the support.

[0005] The utility model is realized through the following technical solutions:

[0006] A structure of a tractor lower pull rod support includes a lower pull rod, a mounting seat and a pin shaft. The mounting seat is in the form of a simply supported beam, and both ends thereof are symmetrically arranged pull rod supports. A side strip plate is welded on the outer side surface of the pull rod support. The lower pull rod is sleeved on the pin shaft through a bushing. One end face of the pin shaft is welded to one end of the side strip plate. A hole is opened at the other end of the side strip plate, and it is fixed to a screw hole provided on the outer side surface of the pull rod support through a bolt and an elastic washer. A bushing is provided between the inner cavity wall of the pin shaft and the pull rod support. A circle of mounting holes is opened on the side surface of the mounting seat for docking with the rear axle.

[0007] Preferably, the rotation angle of the lower pull rod is 74 degrees.

[0008] Preferably, positioning pins are provided at two mounting holes located at the diagonal positions on the side surface of the mounting seat for docking with the rear axle.

[0009] Preferably, the mounting base is mounted on the bottom of the rear axle by bolts with flanges at other mounting holes where no locating pins are provided on the side of the mounting base that is butt joint with the rear axle.

[0010] Preferably, a drain hole is provided in the middle of the mounting seat.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By re-molding the lower tie rod support, using a simply supported beam to replace the original lower tie rod shaft that runs through the entire support, and using short pins to support the lower tie rod in the tie rod supports at both ends of the entire mounting seat, the support at both ends greatly improves the strength of the pin, thereby improving the torsional strength of the support. If the pin is worn, the side strips can be removed at both ends of the mounting seat for replacement, without having to replace the mounting seat and the pin at the same time. The bolt spring washer structure originally used to fix the rear axle is changed to a bolt with a flange surface and a positioning pin to reduce the risk of bolt loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of the lower tie rod support structure of the tractor of the utility model;

[0015] Figure 2 for Figure 1 Medium AA view;

[0016] Figure 3 for Figure 1 Middle BB view;

[0017] Figure 4 Bit Figure 1 Medium CC view.

[0018] Among them, there are a lower pull rod 1, a mounting seat 2, a pull rod support 201, a mounting hole 202, a drain hole 203, a pin shaft 3, a sleeve 4, a side strip 5, a bolt 6, an elastic washer 7, a bushing 8, a bolt with a flange surface 9, and a positioning pin 10. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings. Figures 1-4 The invention shows a structure of a lower tie rod support of a tractor, which includes a lower tie rod 1, a mounting seat 2 and a pin 3. The mounting seat 2 is designed as a simply supported beam, and the two ends of the mounting seat are symmetrically arranged tie rod supports 201. Side strips 5 are welded on the outer surface of the tie rod support 201. The lower tie rod 1 is sleeved on the pin 3 through a shaft sleeve 4. One end surface of the pin 3 is welded to one end of the side strip 5. The other end of the side strip 5 is opened and fixed to the screw hole set on the outer side surface of the tie rod support 201 by bolts 6 and elastic washers 7 to prevent the pin from rotating, improve the reliability of the shaft fixing without weakening the strength of the shaft, and avoid the rotation friction between the pin and the lower tie rod support. Although the pin is fixed, when the lower tie rod rotates for a long time, friction and extrusion will occur, causing wear. A bushing 8 is provided between the pin 3 and the inner cavity wall of the tie rod support 201. After wear, only the bushing needs to be replaced, which reduces the maintenance cost. A circle of mounting holes 202 is provided on the side of the mounting seat 2 that is butted against the rear axle, for firmly fixing the mounting seat 2 on the rear axle.

[0021] like Figure 4 The lower pull rod 1 rotates on the pin 3 through the shaft sleeve 4. In the actual manufacturing process, the rotation angle is designed to be 74 degrees.

[0022] Combination Figure 2 On the side of the mounting base 2 that is connected to the rear axle, two mounting holes 202 located at the diagonal positions are provided with positioning pins 10. These two positioning pins improve the connection strength and reduce the risk of damage to parts caused by loose bolts. On the side of the mounting base 2 that is connected to the rear axle, other mounting holes 202 that are not provided with positioning pins 10 are installed on the bottom of the rear axle through flange bolts 9. The original bolt spring washer structure is changed to a flange bolt, which has a good anti-loosening effect and reduces the risk of bolt loosening.

[0023] When the tractor is working in a paddy field, water may enter the inner cavity gap of the mounting seat 2. In order to prevent rust, the bottom of the mounting seat 2 is sealed and a drain hole 203 is opened in the middle to remove water in time.

[0024] The working principle of this utility model:

[0025] like Figure 1, the mounting base 2 is in the form of a simply supported beam, and its two ends are provided with symmetrically arranged tie rod supports 201. The lower tie rod 1 is sleeved on the pin shaft 3 through the bushing 4. The pin shaft 3 is fixed in the inner cavity of the tie rod support 201. A bushing 8 is provided between the pin shaft 3 and the inner cavity wall of the tie rod support 201. After installation, one end face of the pin shaft 3 is welded to the side strip 5, and the side strip 5 is welded to the outer side face of the tie rod support 201, thereby fixing the pin shaft 3. Thus, a short pin shaft is used to support the lower tie rod, replacing the original design of passing the entire support shaft through the support. Since the two-end support greatly improves the strength of the pin shaft, the torsional strength of the entire support is further improved.

[0026] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tractor lower tie rod support structure, characterized in that: It comprises a lower tie rod (1), a mounting seat (2) and a pin (3), wherein the mounting seat (2) is a simply supported beam, and has tie rod supports (201) symmetrically arranged at both ends, and a side strip (5) is welded on the outer surface of the tie rod support (201), and the lower tie rod (1) is sleeved on the pin (3) through a shaft sleeve (4), and one end surface of the pin (3) is welded to one end of the side strip (5), and a hole is opened on the other end of the side strip (5) and fixed to the screw hole arranged on the outer surface of the tie rod support (201) by bolts (6) and elastic washers (7), a bushing (8) is arranged between the inner cavity wall of the pin (3) and the tie rod support (201), and a circle of mounting holes (202) is opened on the side of the mounting seat (2) that is connected to the rear axle.

2. The tractor lower tie rod support structure according to claim 1, characterized in that: The rotation angle of the lower pull rod (1) is 74 degrees.

3. The tractor lower tie rod support structure according to claim 1, characterized in that: Positioning pins (10) are provided on the side of the mounting seat (2) that is butt-jointed with the rear axle and at two mounting holes (202) located at diagonal positions.

4. The tractor lower tie rod support structure according to claim 3, characterized in that: The bottom of the rear axle is installed by bolts (9) with flanges on the side of the mounting seat (2) that is butt-jointed with the rear axle and at other mounting holes (202) where no positioning pins (10) are provided.

5. The tractor lower tie rod support structure according to claim 1, characterized in that: A water discharge hole (203) is provided in the middle of the mounting seat (2).

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