阅读说明：本技术 一种用于转向装置保护罩的压力开关 (Pressure switch for protective cover of steering device ) 是由 雷作钊 薛天宝 李以聪 罗南昌 于 2019-12-30 设计创作，主要内容包括：本发明涉及汽车领域,具体涉及一种用于转向装置保护罩的压力开关,所述压力开关包括柱状的外壳和位于外壳内的钢珠,所述外壳顶端与油道连通,所述外壳底端设有多个呈扇形的弹性簧片,多个所述弹性簧片拼接成为一个完整的圆形,所述钢珠设置于弹性簧片上。本发明通过油道内油压来控制压力开关开闭,十分便捷；当部分润滑油流出通孔后,油压降低压力开关自动关闭,不会造成一次排出过多的润滑油。(The invention relates to the field of automobiles, in particular to a pressure switch for a protective cover of a steering device, which comprises a columnar shell and steel balls positioned in the shell, wherein the top end of the shell is communicated with an oil duct, the bottom end of the shell is provided with a plurality of fan-shaped elastic reeds, the elastic reeds are spliced into a complete circle, and the steel balls are arranged on the elastic reeds. The pressure switch is controlled to be opened and closed through oil pressure in the oil duct, so that the oil-gas separator is very convenient and fast; when part of the lubricating oil flows out of the through hole, the oil pressure reduction pressure switch is automatically closed, and excessive lubricating oil cannot be discharged at one time.)

1. A pressure switch for a steering device protection cover comprises a cover body, wherein an oil duct is arranged in the cover body, a through hole for communicating the oil duct with an inner cavity is also formed in the cover body, and the pressure switch is arranged in the through hole;

the pressure switch comprises a cylindrical shell and steel balls located in the shell, the top end of the shell is communicated with an oil duct, a plurality of fan-shaped elastic reeds are arranged at the bottom end of the shell and spliced into a complete circle, and the steel balls are arranged on the elastic reeds.

2. The pressure switch for the protective cover of the steering device according to claim 1, wherein a steel ball retaining ring is provided in the housing, the steel ball retaining ring is fixedly connected with the inner wall of the housing, and the steel ball is positioned between the steel ball retaining ring and the elastic spring.

3. The pressure switch for the steering device protecting cover according to claim 1, wherein the bottom end of the housing is provided with a reed limiting ring, the reed limiting ring is positioned below the elastic reed, and the edge of the reed limiting ring is fixedly connected with the housing through a connecting rod.

4. A pressure switch for a steering gear boot as set forth in claim 3, wherein said reed retainer ring has a diameter smaller than the diameter of the steel ball.

Technical Field

The invention relates to the field of automobiles, in particular to a pressure switch for a protective cover of a steering device.

Background

The steering device of the vehicle generally controls a gear to rotate through a steering wheel, and then drives a rack meshed with the gear to move, and transverse pull rods at two ends of the rack pull wheels to deflect so as to realize the steering of the vehicle.

On large-scale carrier loader or engineering vehicle, the volume of gear and rack is also corresponding great, and the meshing process needs better lubrication, however because the rack is generally sealed inside the protective cover, can't add lubricating oil to between gear and rack conveniently, and the lubrication of adding in advance has the oil reduction after long-time the use, and viscidity increase just can mix into impurity, influences the meshing between gear and the rack.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided is a steering device protection cover which can realize convenient and fast addition of lubricating oil between a gear and a rack of a vehicle steering device.

In order to solve the technical problems, the invention adopts the technical scheme that: a protective cover of a steering device comprises a cover body, an oil bin, a circulating pump, a pressure regulating device and a pressure switch;

the circulating pump is communicated with the oil bin;

the middle part of the cover body is provided with an inner cavity for placing a rack, the cover body is internally provided with an oil duct, two ends of the oil duct extend to the outside of the cover body, one end of the oil duct is communicated with the circulating pump through a pipeline, and the other end of the oil duct is communicated with the oil bin;

the pressure regulating device is connected with the oil duct and is used for regulating the pressure in the oil duct;

the cover body is also internally provided with a through hole for communicating the oil duct with the inner cavity, a pressure switch is arranged in the through hole, and the pressure switch is used for controlling the opening and closing of the through hole through the pressure change in the oil duct.

The invention has the beneficial effects that: lubricating oil can be added to the racks in the inner cavity at any time, and the meshing stability between the gear and the rack can be kept; the pressure switch is controlled to be opened and closed through oil pressure in the oil duct, so that the operation is very convenient and fast; when part of the lubricating oil flows out of the through hole, the oil pressure reduction pressure switch is automatically closed, and excessive lubricating oil cannot be discharged at one time.

Drawings

FIG. 1 is a schematic view of a protective cover of a steering apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a pressure regulating device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a pressure switch according to an embodiment of the present invention;

description of reference numerals:

1-a cover body; 11-lumen; 12-an oil duct; 13-a through hole; 14-a pressure regulating cavity; 2-an oil bin; 3-a circulating pump; 4-a pressure regulating device; 41-a piston; 42-a sealing ring; 43-a fixation bar; 44-a slide bar; 5-a pressure switch; 51-a housing; 52-steel balls; 53-spring reed; 54-steel ball spacing ring; 55-reed limit ring.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The most key concept of the invention is as follows: lubricating oil can be added to the rack in the inner cavity at any time, and the meshing stability between the gear and the rack can be kept.

Referring to fig. 1 to 3, the protective cover of a steering device of the present invention includes a cover body 1, an oil tank 2, a circulation pump 3, a pressure regulating device 4 and a pressure switch 5;

the circulating pump 3 is communicated with the oil bin 2;

an inner cavity 11 for placing a rack is formed in the middle of the cover body 1, an oil duct 12 is formed in the cover body 1, two ends of the oil duct 12 extend out of the cover body 1, one end of the oil duct is communicated with the circulating pump 3 through a pipeline, and the other end of the oil duct is communicated with the oil bin 2;

the pressure regulating device 4 is connected with the oil duct 12, and the pressure regulating device 4 is used for regulating the pressure in the oil duct 12;

the cover body 1 is further internally provided with a through hole 13 for communicating the oil duct 12 with the inner cavity 11, the through hole 13 is internally provided with a pressure switch 5, and the pressure switch 5 is used for controlling the opening and closing of the through hole 13 through the pressure change in the oil duct 12.

The working principle of the invention is as follows: the lubricating oil in the oil bin 2 flows into the oil duct 12 and flows back to the oil bin 2 through the circulating pump 3, and the circulating is continuous. When lubricating oil needs to be added to the rack, the pressure regulating device 4 is regulated to increase the oil pressure in the oil channel 12, at the moment, the pressure switch 5 in the through hole 13 is opened due to the increase of the oil pressure, and a small part of the lubricating oil flows to the rack from the through hole 13 for lubrication.

As can be seen from the above description, the beneficial effects of the present invention are: lubricating oil can be added to the racks in the inner cavity at any time, and the meshing stability between the gear and the rack can be kept; the pressure switch is controlled to be opened and closed through oil pressure in the oil duct, so that the operation is very convenient and fast; when part of the lubricating oil flows out of the through hole, the oil pressure reduction pressure switch is automatically closed, and excessive lubricating oil cannot be discharged at one time.

Furthermore, a pressure regulating cavity 14 is formed in the cover body 1, the pressure regulating cavity 14 is communicated with the oil duct 12, and the pressure regulating device 4 is connected to the pressure regulating cavity 14 in a sliding mode.

From the above description, it can be known that the flow area of the oil passage can be reduced by extending the pressure regulating device out of the pressure regulating cavity, and the oil pressure in the oil passage is further improved.

Further, the pressure regulating device 4 comprises a piston 41 and a hydraulic telescopic rod, the piston 41 is slidably connected in the pressure regulating cavity 14, and one end of the hydraulic telescopic rod penetrates through the cover body 1 and is fixedly connected with the piston 41 in the pressure regulating cavity 14.

As can be seen from the above description, the position of the piston can be controlled by controlling the extension or retraction of the hydraulic telescoping rod.

Further, a ring groove is formed in the surface of the piston 41, a sealing ring 42 is arranged in the ring groove, and the sealing ring 42 is in contact with the inner wall of the pressure regulating cavity 14.

From the above description, the sealing ring can prevent a large amount of lubricating oil from flowing into the jump wall cavity.

Further, the hydraulic telescopic rod comprises a fixed rod 43 and a sliding rod 44 slidably connected in the fixed rod 43, the fixed rod 43 is fixedly connected to the housing 1, and the sliding rod 44 is fixedly connected to the piston 41.

Further, the pressure switch 5 comprises a cylindrical shell 51 and a steel ball 52 positioned in the shell 51, the top end of the shell 51 is communicated with the oil passage 12, the bottom end of the shell 51 is provided with a plurality of fan-shaped elastic reeds 53, the elastic reeds 53 are spliced into a complete circle, and the steel ball 52 is arranged on the elastic reeds 53.

It can be known from the above description that, when a plurality of elastic spring skin pieces are not atress, the concatenation forms a complete circular, does not have the clearance between the adjacent elastic reed, therefore lubricating oil can not flow out, and when oil duct internal oil pressure increased, lubricating oil can cause the pressure to the steel ball, and the steel ball is pushed down, and the elastic reed is crooked downwards, and lubricating oil can follow the clearance between the adjacent elastic reed this moment and flow out.

Further, a steel ball limiting ring 54 is arranged in the shell 51, the steel ball limiting ring 54 is fixedly connected with the inner wall of the shell 51, and the steel ball 52 is positioned between the steel ball limiting ring 54 and the elastic spring piece 53.

As can be seen from the above description, the steel ball limiting ring can prevent the steel ball from moving randomly.

Further, a reed limiting ring 55 is arranged at the bottom end of the shell 51, the reed limiting ring 55 is positioned below the elastic reed 53, and the edge of the reed limiting ring 55 is fixedly connected with the shell 51 through a connecting rod.

As can be seen from the above description, the spring plate limiting ring can prevent the spring plate from being bent too much to be restored.

Further, the diameter of the reed limiting ring 55 is smaller than that of the steel ball 52.

Further, the oil bin 2 is fixedly connected with the cover body 1.

Example one

A protective cover of a steering device comprises a cover body 1, an oil bin 2, a circulating pump 3, a pressure regulating device 4 and a pressure switch 5;

the oil bin 2 is fixedly connected with the cover body 1, and the circulating pump 3 is communicated with the oil bin 2;

an inner cavity 11 for placing a rack is formed in the middle of the cover body 1, an oil duct 12 is formed in the cover body 1, two ends of the oil duct 12 extend out of the cover body 1, one end of the oil duct is communicated with the circulating pump 3 through a pipeline, and the other end of the oil duct is communicated with the oil bin 2;

the pressure regulating device 4 is connected with the oil duct 12, and the pressure regulating device 4 is used for regulating the pressure in the oil duct 12;

a through hole 13 for communicating the oil duct 12 with the inner cavity 11 is further formed in the cover body 1, a pressure switch 5 is arranged in the through hole 13, and the pressure switch 5 is used for controlling the opening and closing of the through hole 13 through the pressure change in the oil duct 12;

a pressure regulating cavity 14 is formed in the cover body 1, the pressure regulating cavity 14 is communicated with the oil duct 12, the pressure regulating device 4 is connected in the pressure regulating cavity 14 in a sliding manner, the pressure regulating device 4 comprises a piston 41 and a hydraulic telescopic rod, the piston 41 is connected in the pressure regulating cavity 14 in a sliding manner, one end of the hydraulic telescopic rod penetrates through the cover body 1 and is fixedly connected with the piston 41 in the pressure regulating cavity 14, an annular groove is formed in the surface of the piston 41, a sealing ring 42 is arranged in the annular groove, the sealing ring 42 is in contact with the inner wall of the pressure regulating cavity 14, the hydraulic telescopic rod comprises a fixed rod 43 and a sliding rod 44 connected in the fixed rod 43 in a sliding manner, the fixed rod 43 is fixedly connected with the cover body 1, and the sliding rod 44 is fixedly connected with the piston 41;

the pressure switch 5 comprises a cylindrical shell 51 and a steel ball 52 positioned in the shell 51, the top end of the shell 51 is communicated with the oil duct 12, the bottom end of the shell 51 is provided with a plurality of fan-shaped elastic reeds 53, the elastic reeds 53 are spliced into a complete circle, the steel ball 52 is arranged on the elastic reeds 53, a steel ball limiting ring 54 is arranged in the shell 51, the 54 position of the steel ball limiting ring is fixedly connected with the inner wall of the shell 51, the steel ball 52 is positioned between the steel ball limiting ring 54 and the elastic reeds 53, the bottom end of the shell 51 is provided with a reed limiting ring 55, the reed limiting ring 55 is positioned below the elastic reeds 53, the edge of the reed limiting ring 55 is fixedly connected with the shell 51 through a connecting rod, and the diameter of the reed limiting ring 55 is smaller than that of the steel ball 52.

In conclusion, the beneficial effects provided by the invention are as follows: lubricating oil can be added to the racks in the inner cavity at any time, and the meshing stability between the gear and the rack can be kept; the pressure switch is controlled to be opened and closed through oil pressure in the oil duct, so that the operation is very convenient and fast; when part of the lubricating oil flows out of the through hole, the oil pressure reduction pressure switch is automatically closed, and excessive lubricating oil cannot be discharged at one time. The pressure regulating device extends out of the pressure regulating cavity, so that the flow area of the oil duct can be reduced, and the oil pressure in the oil duct is further improved. The position of the piston can be controlled by controlling the extension or retraction of the hydraulic telescopic rod. The sealing ring can prevent lubricating oil from flowing into the jumping wall cavity in a large quantity. When a plurality of elastic spring skin pieces are not atress, be that the concatenation forms a complete circular, do not have the clearance between the adjacent elastic reed, consequently lubricating oil can not flow, and when oil duct internal oil pressure increased, lubricating oil can lead to the fact pressure to the steel ball, and the steel ball is pushed down, and the elastic reed downwarping, lubricating oil can follow the clearance outflow between the adjacent elastic reed this moment. The steel ball limiting ring can prevent the steel ball from moving randomly. The reed limiting ring can avoid the situation that the bending degree of the reed is too large to cause the failure in restoration.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.