阅读说明：本技术 一种叉车用铸造转向桥 (Forklift casting steering axle ) 是由 沈四海 于 2020-06-08 设计创作，主要内容包括：本发明公开一种叉车用铸造转向桥,包括有转向桥体、转向油缸以及均为两个的转向节、连杆、主销、连杆销；两个主销并分别设于转向桥体的两端；主销上设有两个圆锥滚子轴承,转向节安装在两个圆锥滚子轴承上,圆锥滚子轴承的上端设有防尘圈,圆锥滚子轴承的下端设有油封,转向节上设有拉臂孔,连杆销安装在拉臂孔内；转向油缸设在转向桥体上,转向油缸包括有缸筒总成、活塞杆、活塞、法兰支架、两个导向套,法兰支架焊接在缸筒总成上,活塞套设在活塞杆上,活塞杆通过两个导向套安装在缸筒总成内；连杆的两端分别铰接在连杆销、活塞杆上。本发明大幅提升转向桥的可靠性和耐久性,防范安全风险。(The invention discloses a cast steering axle for a forklift, which comprises a steering axle body, a steering oil cylinder, two steering knuckles, two connecting rods, two main pins and two connecting rod pins, wherein the steering knuckle is connected with the steering oil cylinder; the two main pins are respectively arranged at two ends of the steering axle body; the main pin is provided with two tapered roller bearings, the steering knuckle is arranged on the two tapered roller bearings, the upper end of each tapered roller bearing is provided with a dustproof ring, the lower end of each tapered roller bearing is provided with an oil seal, the steering knuckle is provided with a pull arm hole, and the connecting rod pin is arranged in the pull arm hole; the steering oil cylinder is arranged on the steering axle body and comprises a cylinder barrel assembly, a piston rod, a piston, a flange bracket and two guide sleeves, the flange bracket is welded on the cylinder barrel assembly, the piston is sleeved on the piston rod, and the piston rod is arranged in the cylinder barrel assembly through the two guide sleeves; two ends of the connecting rod are respectively hinged on the connecting rod pin and the piston rod. The invention greatly improves the reliability and durability of the steering axle and prevents safety risks.)

1. The utility model provides a fork truck is with casting steer axle which characterized in that: the steering axle comprises a steering axle body, a steering oil cylinder, two steering knuckles, a connecting rod, a main pin and a connecting rod pin; the two main pins are respectively arranged at two ends of the steering axle body; the main pin is provided with two tapered roller bearings, the steering knuckle is installed on the two tapered roller bearings, the upper end of each tapered roller bearing is provided with a dustproof ring, the lower end of each tapered roller bearing is provided with an oil seal, the steering knuckle is provided with a pull arm hole, and the connecting rod pin is installed in the pull arm hole; the steering oil cylinder is arranged on the steering axle body and comprises a cylinder barrel assembly, a piston rod, a piston, a flange bracket and two guide sleeves, wherein the flange bracket is welded on the cylinder barrel assembly; and two ends of the connecting rod are respectively hinged on the connecting rod pin and the piston rod.

2. The cast steering axle for a forklift truck according to claim 1, characterized in that: the steering axle body is cast by high-strength nodular cast iron with the tensile strength of more than 450MPa and the elongation of more than 15%.

3. The cast steering axle for a forklift truck according to claim 1, characterized in that: the steering oil cylinder is fixed on the steering axle body through four hinged bolts.

4. The cast steering axle for a forklift truck according to claim 1, characterized in that: the flange bracket is formed by forging.

5. The cast steering axle for a forklift truck according to claim 1, characterized in that: the inner circle axis of the mounting surface of the flange bracket and the central axis of the piston rod are heavy.

6. The cast steering axle for a forklift truck according to claim 1, characterized in that: and a wheel hub is arranged on the steering knuckle.

Technical Field

The invention relates to the technical field of industrial vehicles, in particular to a cast steering axle for a forklift.

Background

The forklift is widely applied to places such as factories, warehouses, stations, ports, airports and the like, and is a material handling vehicle for mechanized loading and unloading, stacking and short-distance transportation. The forklift steering axle body with the traditional structure is a box type structure welded by steel plates, and has the defects of complex processing technology, poor welding defect, poor appearance and the like. The steering axle steering mechanism with the traditional structure is formed by connecting two needle roller bearings and a thrust ball bearing, a main pin is matched with a roller of the needle roller bearings, the main pin and a steering knuckle are fixedly arranged together, the main pin rotates along with the steering knuckle when the steering knuckle rotates, and when a forklift is used, the steering knuckle generates larger radial force and bearing force due to frequent steering operation on a full-load, overloaded or bumpy road surface, and the main pin and the needle roller bearings generate larger friction force, so that a needle roller bearing retainer has bad phenomena of early-rise abrasion or burning-out, main pin abrasion and the like; when the machining error of the inner gear distance of the steering axle body is too large or too small or the bridge plate is elastically deformed, the phenomenon that the axial force or the radial force of the thrust ball bearing is increased can occur, so that the thrust ball bearing is broken due to the too large axial force, and the early-rise abrasion and other adverse phenomena are caused by the large radial force.

Accordingly, there is a need for a cast steering axle for a forklift.

Disclosure of Invention

The invention provides a cast steering axle for a forklift, which can effectively solve the technical problems in the background.

In order to achieve the above purpose, the invention provides the following technical scheme:

a cast steering axle for a forklift comprises a steering axle body, a steering oil cylinder, two steering knuckles, two connecting rods, two main pins and two connecting rod pins; the two main pins are respectively arranged at two ends of the steering axle body; the main pin is provided with two tapered roller bearings, the steering knuckle is installed on the two tapered roller bearings, the upper end of each tapered roller bearing is provided with a dustproof ring, the lower end of each tapered roller bearing is provided with an oil seal, the steering knuckle is provided with a pull arm hole, and the connecting rod pin is installed in the pull arm hole; the steering oil cylinder is arranged on the steering axle body and comprises a cylinder barrel assembly, a piston rod, a piston, a flange bracket and two guide sleeves, wherein the flange bracket is welded on the cylinder barrel assembly; and two ends of the connecting rod are respectively hinged on the connecting rod pin and the piston rod.

Preferably, the steering axle body is cast by high-strength nodular cast iron with the tensile strength of more than 450MPa and the elongation of more than 15%.

Preferably, the steering oil cylinder is fixed on the steering axle body through four hinged bolts.

Preferably, the flange bracket is formed by forging.

Preferably, the inner circle axis of the mounting surface of the flange bracket and the central axis of the piston rod are heavy.

Preferably, a wheel hub is arranged on the steering knuckle.

The invention has the beneficial effects that:

the invention effectively solves the problem of the failure of the main pin, the needle bearing and the thrust bearing in the traditional technology by arranging the matching of the steering knuckle, the main pin and the tapered roller bearing. The invention greatly improves the reliability and durability of the steering axle and prevents safety risks.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1: the invention has a schematic structure.

FIG. 2: the invention discloses a structure schematic diagram of a connection of a steering knuckle and a steering axle body.

FIG. 3: the invention is shown in the structural diagram A.

FIG. 4: the invention discloses a structural schematic diagram of a steering oil cylinder.

FIG. 5: the flange bracket of the invention has a schematic structural diagram.

In the figure: 1. the steering axle comprises a steering axle body, 2, a steering knuckle, 21, a tapered roller bearing, 22, a dustproof ring, 23, an oil seal, 24, a steering wheel hub, 3, a main pin, 4, a connecting rod, 5, a connecting rod pin, 6, a steering oil cylinder, 61, a cylinder barrel assembly, 611, a flange support, 62, a piston rod, 63, a piston, 64, a guide sleeve, 7 and a hinged bolt.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the attached drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims:

referring to fig. 1, the invention provides a cast steering axle for a forklift, which comprises a steering axle body 1, a steering cylinder 6, two steering knuckles 2, a connecting rod 4, a main pin 3 and a connecting rod pin 5, wherein the steering axle body 1 is cast by high-strength nodular cast iron with tensile strength of more than 450Mpa and elongation of more than 15%, and has the advantages of compact structure, attractive appearance, labor efficiency improvement and product quality improvement.

Referring to fig. 1, 2 and 3, two main pins 3 are respectively disposed at two ends of the steer axle 1, two tapered roller bearings 21 are disposed on the main pins 3, the knuckle 2 is mounted on the two tapered roller bearings 21, a dust ring 22 is disposed at an upper end of the tapered roller bearings 21, an oil seal 23 is disposed at a lower end of the tapered roller bearings 21, and the dust ring 22 and the oil seal 23 can prevent dust and sewage from entering.

Referring to fig. 1 and 4, the steering cylinder 6 is fixed on the steering axle body 1 by four hinge bolts 7, and the steering cylinder 6 includes a cylinder assembly 61, a piston rod 62, a piston 63, a flange bracket 611, and two guide sleeves 64.

Referring to fig. 4 and 5, the piston 63 is sleeved on the piston rod 62, the piston rod 62 is installed in the cylinder assembly 61 through the two guide sleeves 64, the flange bracket 611 is welded on the cylinder assembly 61, the flange bracket 611 is formed by forging, and an inner circle axis of an installation surface of the flange bracket 611 coincides with a central axis of the piston rod 62, so that the flange bracket 611 is convenient to install and maintain.

Referring to fig. 4, the two ends of the connecting rod 4 are respectively hinged on the connecting rod pin 5 and the piston rod 62. The knuckle 2 is provided with a draw arm hole, the connecting rod pin 5 is arranged in the draw arm hole, and the knuckle 2 is provided with a wheel hub 24.

The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.