Steering oil cylinder capable of automatically adjusting stroke

Abstract

The utility model discloses a steering oil cylinder capable of automatically adjusting stroke, which belongs to the technical field of mechanical engineering and comprises a cylinder barrel, a guide sleeve is mounted on one side of the cylinder barrel, a piston is slidably connected in the cylinder barrel, a rear cover is mounted on the other side of the cylinder barrel, and a sound insulation and heat dissipation component is arranged on the outer wall of the rear cover. A plunger rod is slidably connected to the interior of the guide sleeve, one end of the plunger rod penetrates through the piston and is connected with the piston, an unloading assembly is arranged in the piston and comprises a first valve sleeve and a second valve sleeve, and the first valve sleeve and the second valve sleeve are installed on the two sides of the interior of the piston respectively; a set of stroke unloading assembly is additionally arranged on the piston, so that the stroke of the steering oil cylinder can be automatically adjusted, when the piston of the oil cylinder rotates to a limit position, the valve rod is ejected open, a high-pressure cavity and a low-pressure cavity are communicated, unloading is achieved, the service life of the steering oil cylinder can be prolonged, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to a steering oil cylinder with automatic stroke adjustment. Background Art

[0002] The steering cylinder is a hydraulic actuator mainly used in the steering systems of vehicles or some construction machinery. Its basic working principle is based on hydraulic transmission. In a closed hydraulic system, when the hydraulic oil is pressurized by the hydraulic pump, it is transported to the inside of the steering cylinder through a pipeline.

[0003] The stroke of the existing steering cylinder is fixed. The contact between the piston and the guide sleeve is a rod cavity stroke, and the contact between the piston and the rear cover is a rodless cavity stroke. If a different stroke is required, the cylinder length needs to be changed, which will cause the cylinder to make the flow path of the hydraulic oil in the cylinder longer, resulting in an increase in the flow resistance of the hydraulic oil. For this reason, we propose a steering cylinder with automatic stroke adjustment. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a steering oil cylinder with automatic stroke adjustment, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steering oil cylinder with automatic stroke adjustment, comprising a cylinder, a guide sleeve is installed on one side of the cylinder, a piston is slidably connected to the inside of the cylinder, a rear cover is installed on the other side of the cylinder, a sound insulation and heat dissipation component is provided on the outer wall of the rear cover, a plunger rod is slidably connected to the inside of the guide sleeve, one end of the plunger rod passes through and is connected to the piston, a unloading component is provided inside the piston, and the unloading component comprises a valve sleeve 1 and a valve sleeve 2, the valve sleeve 1 and the valve sleeve 2 are respectively installed on both sides of the inside of the piston, and the insides of the valve sleeve 1 and the valve sleeve 2 are respectively slidably connected to the inside of the piston. A slide rod 1 and a slide rod 2 are connected, and the interiors of the slide rod 1 and the slide rod 2 are respectively slidably connected to the valve stem 1 and the valve stem 2. The outer walls of the valve stem 1 and the valve stem 2 are both provided with a limit assembly, and the limit assembly is specifically a semicircular protrusion, and the semicircular protrusions are respectively opened on the opposite side of the outer walls of the valve stem 1 and the valve stem 2. An elastic assembly is provided between the valve stem 1 and the valve stem 2, and the elastic assembly is specifically a spring. The spring is provided between the valve stem 1 and the valve stem 2, one end of the spring contacts the semicircular block on the outer wall of the valve stem 1, and the other end of the spring contacts the semicircular block on the outer wall of the valve stem 2. The limit assembly and the elastic assembly cooperate with each other for use:

[0006] A stroke unloading assembly is added to the piston. This assembly consists of a valve stem, slide bar, valve sleeve, and spring. When the steering cylinder is installed on the vehicle, it rotates in place. When the piston moves to the left limit, it pushes the slide bar to the right. When the piston moves to the right limit, it pushes the slide bar to the left, thereby fixing the slide bar position and completing the steering cylinder stroke adjustment. The automatically adjustable stroke steering cylinder not only allows the required stroke to be adjusted without changing the dimensions of the components, but also, during use, when the cylinder piston moves to the limit position, the valve stem opens, allowing the high-pressure chamber and the low-pressure chamber to communicate with each other, thereby unloading the load. This can extend the service life of the steering cylinder and reduce the failure rate. The mounting structure remains unchanged, and it has good interchangeability.

[0007] As a preferred technical solution of the present invention, the heat dissipation and sound insulation assembly includes a substrate, which is fixedly connected to the outer wall of the back cover. The outer wall of the substrate is fixedly connected to a plurality of heat dissipation fins. The heat dissipation fins on both sides of the outer wall of the substrate are narrower than the heat dissipation fins in the middle of the substrate. Sound insulation cotton is installed inside the back cover:

[0008] The heat dissipation and sound insulation components can allow the temperature inside the cylinder to quickly dissipate through the rear cover and the base plate by the heat dissipation fins, and the sound insulation cotton can reduce the noise generated by the operation of the cylinder. The above-mentioned heat dissipation and sound insulation components can ensure the stability and comfort of the steering cylinder during operation.

[0009] The beneficial effects of this utility model include the addition of a travel unloading assembly to the piston, allowing the steering cylinder stroke to be automatically adjusted. When the cylinder piston reaches its limit position, the valve stem opens, allowing the high-pressure chamber and the low-pressure chamber to communicate, thereby unloading the load. This increases the service life of the steering cylinder and reduces the failure rate. The mounting structure remains unchanged, ensuring excellent interchangeability.

[0010] The utility model uses the heat dissipation and sound insulation components to quickly dissipate the temperature in the cylinder through the rear cover and the base plate by the heat dissipation fins, and the sound insulation cotton can reduce the noise generated by the operation of the cylinder, ensuring the stability and comfort of the steering cylinder during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall planar structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the unloading component of the utility model;

[0013] Figure 3 This is a schematic structural diagram of the heat dissipation and sound insulation component of the present utility model;

[0014] Figure 4 This is a cross-sectional schematic diagram of the installation of the sound insulation cotton of the present invention.

[0015] In the figure: 1. Cylinder; 2. Piston; 3. Plunger rod; 4. Guide sleeve; 5. Valve stem 1; 6. Slide rod 1; 7. Valve sleeve 1; 8. Spring; 9. Back cover; 10. Valve sleeve 2; 11. Slide rod 2; 12. Valve stem 2; 13. Base plate; 14. Heat sink fins; 15. Sound insulation cotton. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1

[0018] See also Figure 1 and Figure 2 A steering cylinder with automatic stroke adjustment includes a cylinder barrel 1, a guide sleeve 4 is installed on one side of the cylinder barrel 1, a piston 2 is slidably connected to the inside of the cylinder barrel 1, a rear cover 9 is installed on the other side of the cylinder barrel 1, and a sound insulation and heat dissipation component is provided on the outer wall of the rear cover 9. A plunger rod 3 is slidably connected to the inside of the guide sleeve 4, one end of the plunger rod 3 passes through and is connected to the piston 2, and an unloading component is provided inside the piston 2. The unloading component includes a valve sleeve 1 7 and a valve sleeve 2 10, which are respectively installed on both sides of the inside of the piston 2, and the insides of the valve sleeve 1 7 and the valve sleeve 2 10 are slidably connected to the sliding rod 1 6 and the sliding rod 2 11, respectively. The interiors of slide rod 1 6 and slide rod 2 11 are respectively slidably connected with valve stem 1 5 and valve stem 2 12. The outer walls of valve stem 1 5 and valve stem 2 12 are both provided with limiting components. The limiting components are specifically semicircular protrusions. The semicircular protrusions are respectively opened on the opposite sides of the outer walls of valve stem 1 5 and valve stem 2 12. An elastic component is provided between valve stem 1 5 and valve stem 2 12. The elastic component is specifically spring 8. Spring 8 is provided between valve stem 1 5 and valve stem 2 12. One end of the spring 8 contacts the semicircular block on the outer wall of valve stem 1 5, and the other end of the spring 8 contacts the semicircular block on the outer wall of valve stem 2 12. The limiting component and the elastic component are used in conjunction with each other.

[0019] A set of stroke unloading components is added to the piston 2. The device consists of a valve stem 5, a valve stem 2 12, a slide bar 6, a slide bar 2 11, a valve sleeve 1 7, a valve sleeve 2 10 and a spring 8. After the steering cylinder is installed on the vehicle, it rotates in place. When the piston 2 moves to the left limit, it pushes the slide bar 1 6 to slide to the right. When the piston 2 moves to the right limit, it pushes the slide bar 2 11 to slide to the left, thereby fixing the slide bar position. The steering cylinder stroke adjustment is completed. The steering cylinder with automatic stroke adjustment can not only adjust the required stroke without changing the size of components, but also during use, when the cylinder piston 2 rotates to the extreme position, the valve stem is pushed open to make the high-pressure chamber and the low-pressure chamber communicate with each other, thereby unloading. This can increase the service life of the steering cylinder and reduce the failure rate. The installation structure remains unchanged and has good interchangeability.

[0020] See also Figure 3 and Figure 4 In this embodiment, the heat dissipation and sound insulation assembly includes a substrate 13, which is fixedly connected to the outer wall of the back cover 9. The outer wall of the substrate 13 is fixedly connected with multiple heat dissipation fins 14. The heat dissipation fins 14 on both sides of the outer wall of the substrate 13 are narrower than the heat dissipation fins 14 in the middle of the substrate 13. Sound insulation cotton 15 is installed inside the back cover 9.

[0021] When the temperature of the cylinder 1 rises, the temperature inside the cylinder 1 is quickly dissipated through the rear cover 9 and the base plate 13 by the heat dissipation fins 14, and the sound insulation cotton 15 can reduce the noise generated by the operation of the cylinder. The above-mentioned heat dissipation and sound insulation components can ensure the stability and comfort of the steering cylinder during operation.

[0022] Working principle: Add a set of stroke unloading components to the piston 2. After the steering cylinder is installed on the vehicle, it rotates in place. When the piston 2 moves to the left limit, it pushes the slide bar 1 6 to slide to the right. When the piston 2 moves to the right limit, it pushes the slide bar 2 11 to slide to the left, thereby fixing the slide bar position. The steering cylinder stroke adjustment is completed. The steering cylinder with automatic stroke adjustment can not only adjust the required stroke without changing the size of components, but also during use, when the cylinder piston 2 rotates to the extreme position, the valve stem is pushed open, so that the high-pressure chamber and the low-pressure chamber are connected, thereby unloading. This can increase the service life of the steering cylinder and reduce the failure rate. The installation structure remains unchanged and has good interchangeability.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A steering cylinder with automatic stroke adjustment, comprising a cylinder barrel (1), characterized in that: A guide sleeve (4) is installed on one side of the cylinder (1), and a piston (2) is slidably connected inside the cylinder (1). A rear cover (9) is installed on the other side of the cylinder (1), and a sound insulation and heat dissipation component is provided on the outer wall of the rear cover (9). A plunger rod (3) is slidably connected inside the guide sleeve (4), and one end of the plunger rod (3) passes through and is connected to the piston (2), and a unloading component is provided inside the piston (2).

2. The automatic stroke-adjusting steering cylinder according to claim 1, characterized in that: The unloading assembly includes a valve sleeve 1 (7) and a valve sleeve 2 (10), the valve sleeve 1 (7) and the valve sleeve 2 (10) are respectively installed on both sides of the interior of the piston (2), the interiors of the valve sleeve 1 (7) and the valve sleeve 2 (10) are respectively slidably connected with a slide rod 1 (6) and a slide rod 2 (11), the interiors of the slide rod 1 (6) and the slide rod 2 (11) are respectively slidably connected with a valve stem 1 (5) and a valve stem 2 (12), the outer walls of the valve stem 1 (5) and the valve stem 2 (12) are both provided with a limiting assembly, an elastic assembly is provided between the valve stem 1 (5) and the valve stem 2 (12), and the limiting assembly and the elastic assembly are used in conjunction with each other.

3. The automatic stroke-adjusting steering cylinder according to claim 2, characterized in that: The limiting assembly is specifically a semicircular protrusion, and the semicircular protrusion is respectively opened on the opposite side of the outer wall of the valve stem (5) and the valve stem (12).

4. The automatic stroke-adjusting steering cylinder according to claim 2, characterized in that: The elastic component is specifically a spring (8), which is arranged between valve stem one (5) and valve stem two (12), one end of the spring (8) contacts the semicircular block on the outer wall of valve stem one (5), and the other end of the spring (8) contacts the semicircular block on the outer wall of valve stem two (12).

5. The automatic stroke-adjusting steering cylinder according to claim 1, characterized in that: The sound insulation and heat dissipation assembly comprises a base plate (13), the base plate (13) is fixedly connected to the outer wall of the rear cover (9), a plurality of heat dissipation fins (14) are fixedly connected to the outer wall of the base plate (13), and sound insulation cotton (15) is installed inside the rear cover (9).

6. The automatic stroke-adjusting steering cylinder according to claim 5, characterized in that: The heat dissipation fins (14) on both sides of the outer wall of the base plate (13) are narrower than the heat dissipation fins (14) in the middle of the base plate (13).

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