Tractor steering axle

Abstract

The utility model provides a tractor steering axle which comprises an axle housing and a steering oil cylinder, a first fixing seat and a second fixing seat are arranged at the front end of the axle housing, a first stepped hole is formed in the first fixing seat in the extending direction of the axle housing, and a second stepped hole coaxial with the first stepped hole is formed in the second fixing seat. The steering oil cylinder is fixed to the axle housing through the first fixing base and the second fixing base, the two ends of the steering oil cylinder are inserted into the first stepped hole and the second stepped hole correspondingly and limited through the locking and limiting assembly, and the locking and limiting assembly comprises a first limiting bolt arranged on the side, away from the second fixing base, of the first fixing base and a second limiting bolt arranged on the side, away from the second fixing base, of the second fixing base. The first limiting bolt is axially arranged on the first fixing base in a penetrating mode, the steering oil cylinder is pressed in the second fixing base by screwing down the first limiting bolt, and the oil cylinder is axially limited. Meanwhile, the installation precision of the steering oil cylinder is improved, the steering oil cylinder is convenient to maintain, disassemble and assemble, and the machining cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a steering bridge of a tractor. Background Art

[0002] In the prior art, the steering system of the front drive of the paddy field tractor includes a steering cylinder, a piston rod, a cylinder ball joint, and a steering tie rod. Finally, the steering rod transmits the torque to the steering knuckle assembly at the end to complete the steering of the front axle. The cylinder is installed by welding a connecting block on the steering cylinder and installing it on the axle housing through bolt connection. The welding process affects the accuracy of the cylinder body, and the process is complicated and costly. When the front axle is turned, the cylinder is subjected to a force along the axis of the piston cylinder, and the welding strength of the welding structure is not easy to ensure.

[0003] Therefore, it is necessary to provide a kind of tractor steering bridge, to overcome the above-mentioned defectives. Utility Model Content

[0004] The utility model aims to provide a steering bridge for a tractor.

[0005] According to one aspect of the utility model, a tractor steering axle is provided, comprising:

[0006] A bridge housing, wherein a first fixing seat and a second fixing seat are provided at the front end of the bridge housing, a first stepped hole is provided in the first fixing seat along the extending direction of the bridge housing, and a second stepped hole is provided in the second fixing seat coaxially with the first stepped hole;

[0007] A steering cylinder, wherein the steering cylinder is fixed to the axle housing through the first fixing seat and the second fixing seat, and both ends of the steering cylinder are respectively inserted into the first stepped hole and the second stepped hole, and are limited by a locking and limiting assembly;

[0008] The locking and limiting assembly includes a first limiting bolt arranged on the side of the first fixing seat away from the second fixing seat. The first limiting bolt is axially penetrated on the first fixing seat. By tightening the first limiting bolt, axial pressure is applied to the steering cylinder, so that the steering cylinder is pressed into the second fixing seat.

[0009] Preferably, the first fixing seat is provided with an axial threaded hole for the first limiting bolt to pass through, the first limiting bolt is threadedly connected to the axial threaded hole, and the first limiting bolt is locked and fixed to the first fixing seat by a nut.

[0010] Preferably, the number of the first limiting bolts is two, and the two first limiting bolts are symmetrically arranged with respect to the first stepped hole.

[0011] Preferably, piston rods are provided at both ends of the steering cylinder, the first stepped hole comprises a large-diameter portion for accommodating the steering cylinder and a small-diameter portion for the piston rod to pass through, and an annular step surface is provided between the large-diameter portion and the small-diameter portion.

[0012] Preferably, a gasket is provided between the steering cylinder and the annular step surface, and the first limiting bolt abuts against the side surface of the gasket to apply pressure to the steering cylinder through the gasket.

[0013] Preferably, the locking and limiting assembly includes a second limiting bolt radially arranged on the first fixed seat, the radial side of the first fixed seat is provided with a radial threaded hole for the second limiting bolt to pass through, the second limiting bolt is threadedly connected to the radial threaded hole, and the second limiting bolt is fixed to the first fixed seat by locking with a nut.

[0014] Preferably, a limiting groove is provided on the circumferential outer surface of the steering cylinder, and the second limiting bolt extends into the limiting groove.

[0015] Preferably, a steering knuckle housing is provided at both ends of the bridge housing, a steering rocker arm is provided on the steering knuckle housing, the steering rocker arm is connected to the piston rod on the side through a steering tie rod, and the steering tie rod is connected to the piston rod through a universal joint.

[0016] Preferably, a swing pin support is provided in the middle of the front end of the bridge housing, and the first fixing seat and the second fixing seat are provided on both sides of the swing pin support and are fixed to the bridge housing by bolts.

[0017] Preferably, the swing pin support is provided with a casting hole, and the steering cylinder passes through the casting hole.

[0018] Compared with the prior art, the tractor steering axle provided by the utility model has the following beneficial effects:

[0019] Due to the adoption of the above-mentioned technical scheme, the utility model has the advantages of simple structure, ingenious design and low cost. The steering cylinder is fixed on the bridge housing by the first fixed seat and the second fixed seat, and the cylinder is axially limited by the first limiting bolt, and the rotation of the cylinder itself is limited by the second limiting bolt, thereby further improving the stability and reliability of the cylinder fixation. At the same time, the installation accuracy of the steering cylinder is improved, maintenance and disassembly are convenient, and the processing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 A three-dimensional diagram of a tractor steering bridge of the utility model;

[0022] Figure 2It is a partial enlarged view of the tractor steering bridge of the utility model;

[0023] Figure 3 It is a three-dimensional diagram of the first fixing seat of the utility model;

[0024] Figure 4 This is a front view of the first fixing seat of the utility model;

[0025] Figure 5 It is a three-dimensional diagram of the second fixing seat of the utility model.

[0026] Among them, 1. bridge housing, 11. swing pin support, 21. first fixed seat, 211. first stepped hole, 2111. large aperture part, 2112. small aperture part, 2113. annular step surface, 212. axial threaded hole, 213. radial threaded hole, 22. second fixed seat, 221. second stepped hole, 3. steering cylinder, 31. limiting groove, 4. piston rod, 5. steering rod, 6. steering knuckle housing, 61. steering rocker arm, 71. first limiting bolt, 72. second limiting bolt, 8. nut, 9. gasket. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0028] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0029] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0033] See also Figure 1 The present embodiment discloses a tractor steering axle, comprising an axle housing 1, a steering cylinder 3, a piston rod 4, a steering tie rod 5 and a knuckle housing 6. The knuckle housing 6 is arranged at two ends of the axle housing 1, and a steering rocker arm 61 is arranged on the knuckle housing 6. The steering cylinder 3 is arranged at the front end of the axle housing 1, and piston rods 4 are arranged at both ends of the steering cylinder 3. The steering rocker arm 61 is connected to the piston rod 4 on the side thereof through the steering tie rod 5, and the steering tie rod 5 is connected to the piston rod 4 through a universal joint.

[0034] See also Figures 2 to 5 A first fixing seat 21 and a second fixing seat 22 are provided at the front end of the axle housing 1, and the steering cylinder 3 is fixed to the axle housing 1 through the first fixing seat 21 and the second fixing seat 22. A swing pin support 11 is provided at the middle of the front end of the axle housing 1, and the first fixing seat 21 and the second fixing seat 22 are provided on both sides of the swing pin support 11 and fixed to the axle housing 1 by bolts. The swing pin support 11 is provided with a casting hole, and the steering cylinder 3 passes through the casting hole.

[0035] A first stepped hole 211 is provided in the first fixing seat 21 along the extension direction of the bridge housing 1, and a second stepped hole 221 is provided in the second fixing seat 22 coaxially with the first stepped hole 211. The two ends of the steering cylinder 3 are respectively inserted into the first stepped hole 211 and the second stepped hole 221, and are limited by the locking limit assembly. The first stepped hole 211 includes a large-diameter portion 2111 for accommodating the steering cylinder 3 and a small-diameter portion 2112 for the piston rod 4 to pass through, and an annular step surface 2113 is provided between the large-diameter portion 2111 and the small-diameter portion 2112. The structure of the second stepped hole 221 is the same as that of the first stepped hole 211.

[0036] The locking and limiting assembly includes a first limiting bolt 71 and a second limiting bolt 72. The first limiting bolt 71 is arranged on the side of the first fixing seat 21 away from the second fixing seat 22, and the first limiting bolt 71 is axially penetrated on the first fixing seat 21. The second limiting bolt 72 is radially arranged on the first fixing seat 21.

[0037] The first fixing seat 21 is provided with an axial threaded hole 212 for the first limiting bolt 71 to pass through, and the first limiting bolt 71 is threadedly connected to the axial threaded hole 212. The first limiting bolt 71 is locked on the first fixing seat 21 by the nut 8, and the first limiting bolt 71 is locked and fixed by tightening the nut 8 to prevent it from loosening. After tightening the first limiting bolt 71 inward, an axial force in the direction of the second fixing seat 22 is applied to the steering cylinder 3, so that it is pressed into the second stepped hole 221, thereby limiting its axial degree of freedom, and preventing the steering cylinder 3 from axially moving between the first fixing seat 21 and the second fixing seat 22.

[0038] Preferably, the number of the first limiting bolts 71 is two, and the two first limiting bolts 71 are symmetrically arranged about the first stepped hole 211. In other embodiments, the number of the first limiting bolts 71 is not limited to two, and the number is determined according to actual needs.

[0039] A gasket 9 is provided between the steering cylinder 3 and the annular step surface 2113, and the first limiting bolt 71 abuts against the side of the gasket 9, and the steering cylinder 3 is pressed through the gasket 9. The provision of the gasket 9 can make the applied pressing force more evenly dispersed on the steering cylinder 3, the pressing and limiting effect is better, and the outside of the cylinder is protected from indentation, further increasing the stability and reliability of the pressing and limiting.

[0040] A radial threaded hole 213 is provided on the radial side surface of the first fixing seat 21 for the second limiting bolt 72 to penetrate, and the second limiting bolt 72 is threadedly connected to the radial threaded hole 213. The second limiting bolt 72 is fixed to the first fixing seat 21 by a nut to prevent the second limiting bolt 72 from loosening. A limiting groove 31 is provided on the circumferential outer surface of the steering cylinder 3, and the second limiting bolt 72 extends into the limiting groove 31 to prevent the steering cylinder 3 from rotating around its own center line.

[0041] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A tractor steering axle, characterized in that: include: A bridge housing, wherein a first fixing seat and a second fixing seat are provided at the front end of the bridge housing, a first stepped hole is provided in the first fixing seat along the extending direction of the bridge housing, and a second stepped hole is provided in the second fixing seat coaxially with the first stepped hole; A steering cylinder, wherein the steering cylinder is fixed to the axle housing through the first fixing seat and the second fixing seat, and both ends of the steering cylinder are respectively inserted into the first stepped hole and the second stepped hole, and are limited by a locking and limiting assembly; The locking and limiting assembly includes a first limiting bolt arranged on the side of the first fixing seat away from the second fixing seat. The first limiting bolt is axially penetrated on the first fixing seat. By tightening the first limiting bolt, axial pressure is applied to the steering cylinder, so that the steering cylinder is pressed into the second fixing seat.

2. The tractor steering axle according to claim 1, characterized in that: The first fixing seat is provided with an axial threaded hole for the first limiting bolt to pass through, the first limiting bolt is threadedly connected to the axial threaded hole, and the first limiting bolt is locked and fixed to the first fixing seat by a nut.

3. The tractor steering axle according to claim 2, characterized in that: The number of the first limiting bolts is two, and the two first limiting bolts are symmetrically arranged with respect to the first stepped hole.

4. The tractor steering axle according to claim 3, characterized in that: Piston rods are provided at both ends of the steering cylinder. The first stepped hole includes a large-diameter portion for accommodating the steering cylinder and a small-diameter portion for the piston rod to pass through. An annular step surface is provided between the large-diameter portion and the small-diameter portion.

5. The tractor steering axle according to claim 4, characterized in that: A gasket is provided between the steering oil cylinder and the annular step surface, and the first limiting bolt abuts against the side surface of the gasket to apply pressure to the steering oil cylinder through the gasket.

6. The tractor steering axle according to claim 5, characterized in that: The locking and limiting assembly includes a second limiting bolt radially arranged on the first fixing seat, a radial side surface of the first fixing seat is provided with a radial threaded hole for the second limiting bolt to pass through, the second limiting bolt is threadedly connected to the radial threaded hole, and the second limiting bolt is locked and fixed to the first fixing seat by a nut.

7. The tractor steering axle according to claim 6, characterized in that: A limiting groove is provided on the circumferential outer surface of the steering cylinder, and the second limiting bolt extends into the limiting groove.

8. The tractor steering axle according to claim 7, characterized in that: Steering knuckle housings are provided at both ends of the axle housing, and steering rocker arms are provided on the steering knuckle housings. The steering rocker arms are connected to the piston rod on the side through a steering tie rod, and the steering tie rod is connected to the piston rod through a universal joint.

9. The tractor steering axle according to claim 8, characterized in that: A swing pin support is provided at the middle part of the front end of the bridge housing, and the first fixing seat and the second fixing seat are provided at both sides of the swing pin support and are fixed to the bridge housing by bolts.

10. The tractor steering axle according to claim 9, characterized in that: The swing pin support is provided with a casting hole, and the steering cylinder passes through the casting hole.

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