Front drive axle of tractor

Abstract

The utility model provides a tractor front drive axle which comprises a drive axle shell, steering knuckle shells, a steering oil cylinder, a piston rod, a steering pull rod and a protection assembly, the steering knuckle shells are arranged at the two ends of the drive axle shell in the extending direction respectively, steering arms are oppositely arranged on the two steering knuckle shells, the steering oil cylinder is fixed to the middle of the drive axle shell, and the piston rod is fixed to the steering oil cylinder. The piston rod penetrates through the steering oil cylinder, one end of the steering pull rod is connected with the piston rod, the other end of the steering pull rod is connected with the steering arm, and the protection assembly comprises a first protection sleeve arranged at the joint of the piston rod and the steering pull rod and a second protection sleeve arranged on the outer side of the first protection sleeve, the first protective sleeve is arranged in the second protective sleeve, the piston rod, the steering pull rod and the steering oil cylinder are comprehensively protected, dust and silt are effectively prevented from entering the connecting position of the piston rod and the steering pull rod and the interior of the steering oil cylinder in the severe environment, and therefore abrasion of a connecting ball head and oil leakage of the steering oil cylinder are prevented.

Description

Technical Field

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

[0002] With the rapid development of my country's economy, agricultural modernization has been vigorously promoted, and agricultural machinery such as tractors have become very common in rural areas. Tractors are the main tools for farming in my country today. They mainly include transmission systems, driving systems, steering systems, braking systems, etc. The role of the steering system is to control the direction of the vehicle. Some tractors use hydraulic steering systems, that is, the hydraulic cylinder drives the tractor half-axle guide tube to achieve steering. Compared with the mechanical steering system, the hydraulic steering system is easy to steer, and the hydraulic cylinder is fixedly connected to the tractor frame. However, the ball head joint of the front axle of the tractor with a hydraulic steering system is prone to gravel and mud, resulting in severe wear of the ball head, which in turn causes steering failure. At the same time, the hydraulic cylinder has the problem of dust and gravel entering the hydraulic cylinder due to the harsh use environment, and the hydraulic cylinder leaks oil after a long time.

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

[0004] The utility model aims to provide a front drive axle of a tractor.

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

[0006] Drive axle housing,

[0007] Steering knuckle housings, the steering knuckle housings are respectively arranged at two ends of the extension direction of the drive axle housing, and steering arms are arranged on the two steering knuckle housings opposite to each other;

[0008] A steering cylinder, wherein the steering cylinder is fixed in the middle of the drive axle housing;

[0009] A piston rod, the piston rod passes through the steering cylinder and extends to both sides of the steering cylinder, and the piston rod can move axially in the steering cylinder;

[0010] A steering tie rod, one end of which is connected to the piston rod, and the other end of which is connected to the steering arm;

[0011] The protection component comprises a first protection sleeve arranged at the connection between the piston rod and the steering tie rod, and a second protection sleeve arranged outside the first protection sleeve and having two ends respectively fixed to the steering tie rod and the steering cylinder.

[0012] Preferably, a connecting ball head is provided at the end of the steering tie rod, and a ball head housing is provided at the end of the piston rod. The steering tie rod realizes a movable connection with the piston rod by arranging the connecting ball head in the ball head housing.

[0013] Preferably, an annular groove is formed on the outer surface of the steering rod, and the first protective cover includes a first clamping portion clamped in the annular groove, a second clamping portion clamped on the ball head housing, and a first protective portion located between the first clamping portion and the second clamping portion, and the protective portion is made of elastic material and can move telescopically.

[0014] Preferably, the second protective cover includes a first mounting portion sleeved on the steering rod and located on the side of the annular groove away from the connecting ball head, a second mounting portion sleeved on the steering cylinder, and a second protective portion located between the first mounting portion and the second mounting portion and located outside the first protective cover.

[0015] Preferably, the first mounting portion and the steering tie rod as well as the second mounting portion and the steering cylinder are fixedly connected via a locking member.

[0016] Preferably, the inner diameter of the first mounting portion is smaller than the inner diameter of the second protecting portion, and the inner diameter of the second protecting portion is smaller than the inner diameter of the second mounting portion.

[0017] Preferably, the protection assembly further comprises protection covers which are arranged on both sides of the steering cylinder and are located outside the second protection sleeve, and the protection covers are fixed on the drive axle housing.

[0018] Preferably, the protective cover is arranged in a U-shape, including supporting parts which are arranged opposite to each other and fixed to the drive axle housing, and a transition part connecting the two supporting parts.

[0019] Preferably, a fixing plate is horizontally protruded from the outer surface of the steering cylinder toward the side where the drive axle housing is located, and the fixing plate extends along the axial direction of the steering cylinder. A fixing platform for installing the fixing plate is provided on the drive axle housing.

[0020] Compared with the prior art, the tractor front drive axle provided by the utility model has the following beneficial effects:

[0021] Due to the adoption of the above technical scheme, the utility model has the advantages of simple structure, ingenious design and low cost. By arranging the first protective cover inside the second protective cover, the piston rod, the steering rod and the steering cylinder are fully protected, and dust and sand can be more effectively prevented from entering the connection between the piston rod and the steering rod and the inside of the steering cylinder under harsh conditions, thereby preventing the wear of the connecting ball head and the oil leakage of the steering cylinder, thereby making the steering of the driving front axle more flexible and smooth, and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 It is a three-dimensional diagram of the front drive axle of the tractor of the utility model;

[0024] Figure 2 It is a three-dimensional view of the front drive axle of the tractor of the utility model with the protective cover removed;

[0025] Figure 3 This is a front view of the tractor front drive axle of the utility model with the protective cover removed;

[0026] Figure 4 It is a cross-sectional view of the front drive axle of the tractor of the utility model;

[0027] Figure 5 for Figure 4 Enlarged view of point A.

[0028] Among them, 1. drive axle housing, 11. fixed platform, 2. steering knuckle housing, 21. steering arm, 3. steering cylinder, 31. fixed plate, 4. piston rod, 41. ball head housing, 5. steering tie rod, 51. connecting ball head, 52. annular groove, 6. protection assembly, 61. first protective sleeve, 611. first clamping part, 612. second clamping part, 613. first protection part, 62. second protective sleeve, 621. first mounting part, 622. second mounting part, 623. second protection part, 63. locking member, 64. protective cover, 641. support part, 642. transition part. DETAILED DESCRIPTION

[0029] 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.

[0030] 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".

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] See also Figure 1 , Figure 2 and Figure 3 The present embodiment discloses a front drive axle of a tractor, comprising a drive axle housing 1, a steering knuckle housing 2, a steering cylinder 3, a piston rod 4, a steering tie rod 5 and a protection assembly 6. The steering knuckle housing 2 is rotatably disposed at both ends of the extension direction of the drive axle housing 1. Steering arms 21 are disposed oppositely on the two steering knuckle housings 2. The steering cylinder 3 is fixed in the middle of the drive axle housing 1. The piston rod 4 penetrates the steering cylinder 3 and extends to both sides of the steering cylinder 3. One end of the steering tie rod 5 is connected to the piston rod 4, and the other end is connected to the steering arm 21.

[0036] A fixing plate 31 is horizontally protruded from the outer surface of the steering cylinder 3 toward the side where the drive axle housing 1 is located. The fixing plate 31 extends along the axial direction of the steering cylinder 3. A fixing platform 11 for mounting the fixing plate 31 is provided on the drive axle housing 1. The steering cylinder 3 passes through the fixing plate 31 through a plurality of bolts, and the fixing plate 31 is fixed on the fixing platform 11. The piston rod 4 can move axially in the steering cylinder 3. When the piston rod 4 at one end of the steering cylinder 3 is extended, the piston rod 4 at the other end is retracted inward, thereby driving the corresponding steering knuckle housing 2 to rotate.

[0037] The end of the steering tie rod 5 is provided with a connecting ball head 51, and both ends of the piston rod 4 are provided with a ball head housing 41 for accommodating the connecting ball head 51. The steering tie rod 5 is movably connected with the piston rod 4 by arranging the connecting ball head 51 in the ball head housing 41. The outer surface of the steering tie rod 5 is also provided with an annular groove 52. In other embodiments, the steering tie rod 5 and the piston rod 4 can also be connected by a universal joint.

[0038] See also Figure 4 and Figure 5 The protection assembly 6 includes a first protection sleeve 61 disposed at the connection between the steering tie rod 5 and the piston rod 4, and a second protection sleeve 62 disposed outside the first protection sleeve 61 and having two ends respectively fixed to the steering tie rod 5 and the steering cylinder 3. The first protection sleeve 61 includes a first clamping portion 611 clamped in the annular groove 52, a second clamping portion 612 clamped on the ball head housing 41, and a first protection portion 613 located between the first clamping portion 611 and the second clamping portion 612. The first protection portion 613 is made of elastic material and can be telescopically movable.

[0039] The second protective sleeve 62 includes a first mounting portion 621 sleeved on the steering tie rod 5 and located on the side of the annular groove 52 away from the connecting ball head 51, a second mounting portion 622 sleeved on the steering cylinder 3, and a second protective portion 623 located between the first mounting portion 621 and the second mounting portion 622 and located on the periphery of the first protective sleeve 61. The second protective portion 623 is made of elastic material and can move telescopically. The first mounting portion 621 and the steering tie rod 5, and the second mounting portion 622 and the steering cylinder 3 are fixedly connected by a locking member 63. The inner diameter of the first mounting portion 621 is smaller than the inner diameter of the second protective portion 623, and the inner diameter of the second protective portion 623 is smaller than the inner diameter of the second mounting portion 622.

[0040] The coordinated arrangement of the first protective cover 61 and the second protective cover 62 can effectively prevent dust, gravel and muddy water from entering the connection between the piston rod 4 and the steering tie rod 5 and the steering cylinder 3 in a dusty or muddy working environment, thereby preventing the connection ball head 51 and the steering cylinder 3 from being damaged, thereby ensuring the smoothness of the steering. The second protective cover 62 can facilitate the fixed connection between the first mounting portion 621 and the steering tie rod 5 and the second mounting portion 622 and the steering cylinder 3 through the action of the locking member 63, thereby preventing the first mounting portion 621, the second protective portion 623 and the second mounting portion 622 from being dislodged during the use of the steering cylinder 3 and the piston rod 4, thereby preventing the steering cylinder 3 and the piston rod 4 from being protected.

[0041] See also Figure 1The protection assembly 6 also includes a protective cover 64 disposed on both sides of the steering cylinder and located outside the second protective cover 62. The protective cover 64 is fixed to the drive axle housing 1. The protective cover 64 is arranged in a U shape, including a supporting portion 641 that is relatively arranged and fixed to the drive axle housing 1 and a transition portion 642 connecting the two supporting portions 641. When the tractor is operating, the protective cover 64 can well protect the second protective cover 62 to prevent it from being damaged and losing its dust protection function, and at the same time, it can protect the piston rod 4 and the connecting ball head 51 from being damaged.

[0042] 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 front drive axle, characterized in that: include: Drive axle housing, Steering knuckle housings, the steering knuckle housings are respectively arranged at two ends of the extension direction of the drive axle housing, and steering arms are arranged on the two steering knuckle housings opposite to each other; A steering cylinder, wherein the steering cylinder is fixed in the middle of the drive axle housing; A piston rod, the piston rod passes through the steering cylinder and extends to both sides of the steering cylinder, and the piston rod can move axially in the steering cylinder; A steering tie rod, one end of which is connected to the piston rod, and the other end of which is connected to the steering arm; The protection component comprises a first protection sleeve arranged at the connection between the piston rod and the steering tie rod, and a second protection sleeve arranged outside the first protection sleeve and having two ends respectively fixed to the steering tie rod and the steering cylinder.

2. The tractor front drive axle according to claim 1, characterized in that: The end of the steering tie rod is provided with a connecting ball head, and the end of the piston rod is provided with a ball head housing. The steering tie rod is movably connected with the piston rod by arranging the connecting ball head in the ball head housing.

3. The tractor front drive axle according to claim 2, characterized in that: An annular groove is formed on the outer surface of the steering rod, and the first protective cover includes a first clamping portion clamped in the annular groove, a second clamping portion clamped on the ball head housing, and a first protective portion located between the first clamping portion and the second clamping portion, wherein the protective portion is made of elastic material and can move telescopically.

4. The tractor front drive axle according to claim 3, characterized in that: The second protective cover includes a first mounting portion sleeved on the steering tie rod and located on the side of the annular groove away from the connecting ball head, a second mounting portion sleeved on the steering cylinder, and a second protective portion located between the first mounting portion and the second mounting portion and located outside the first protective cover.

5. The tractor front drive axle according to claim 4, characterized in that: The first mounting portion and the steering tie rod as well as the second mounting portion and the steering oil cylinder are fixedly connected via a locking member.

6. The tractor front drive axle according to claim 5, characterized in that: The inner diameter of the first mounting portion is smaller than the inner diameter of the second protecting portion, and the inner diameter of the second protecting portion is smaller than the inner diameter of the second mounting portion.

7. The tractor front drive axle according to claim 6, characterized in that: The protection assembly also includes protection covers arranged on both sides of the steering cylinder and located outside the second protection sleeve, and the protection covers are fixed on the drive axle housing.

8. The tractor front drive axle according to claim 7, characterized in that: The protective cover is arranged in a U shape, and comprises supporting parts which are arranged opposite to each other and fixed to the drive axle housing, and a transition part which connects the two supporting parts.

9. The tractor front drive axle according to claim 8, characterized in that: A fixing plate is horizontally protruded from the outer surface of the steering cylinder toward the side where the drive axle housing is located. The fixing plate extends along the axial direction of the steering cylinder. A fixing platform for installing the fixing plate is provided on the drive axle housing.

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