A dynamically loaded side force suspension cylinder, method and engineering machine

Abstract

The application discloses a kind of suspension oil cylinder of dynamic bearing lateral force, method and engineering machinery, including cylinder, piston, piston rod and cylinder cover;Piston coaxial fixed connection is in piston rod left end;Piston is coaxially installed in cylinder, and piston left side is oil cylinder big cavity, and piston right side is oil cylinder small cavity;Cylinder right side is coaxially fixed and installs cylinder cover;Cylinder cover center is opened with round hole, and piston rod is coaxially passed through round hole, and and round hole form gap sealing cooperation;The inner wall of the round hole in the center of cylinder cover upside is opened with pressure groove I, this pressure groove I is connected with oil cylinder big cavity by communicating part;The inner wall of the round hole in the center of cylinder cover downside is opened with pressure groove II, and hole is opened in cylinder cover and connects pressure groove II and oil cylinder small cavity;Piston upside cylindrical surface is opened with pressure groove III, simultaneously piston is opened with hole and connects pressure groove III and oil cylinder small cavity;Piston downside cylindrical surface pressure groove IV, simultaneously piston is opened with hole and connects pressure groove IV and oil cylinder big cavity.The application has the characteristics of dynamic bearing lateral force.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of dynamic bearing lateral force suspension oil cylinder, belong to mining dump truck application technical field. BACKGROUND

[0002] The mine dump truck with oil and gas suspension instead of steel plate spring has the characteristics of high load bearing and good buffering effect, and is loved by customers.The load weight of this kind of mine dump truck is usually large, and basically all the weight is borne by the suspension oil cylinder, since the load bearing of the suspension oil cylinder is large, the friction at the hinge of the suspension oil cylinder is also large, and the piston will be deviated to one side during movement, increasing the friction, and in severe cases, the oil cylinder will crawl, and the oil cylinder seal will be damaged due to the large extrusion, resulting in oil leakage, and finally the oil cylinder will be damaged, and the mine dump truck cannot operate normally. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects, and the purpose is to provide a kind of dynamic bearing lateral force suspension oil cylinder.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] The present application provides a kind of dynamic bearing lateral force suspension oil cylinder in the first aspect, including cylinder, piston, piston rod and cylinder cover;The piston is coaxially fixedly connected to the left end of the piston rod;The piston is coaxially installed in the cylinder, and the left side of the piston is the large cavity of the oil cylinder, and the right side of the piston is the small cavity of the oil cylinder;The right side of the cylinder is coaxially fixedly installed with the cylinder cover;The center of the cylinder cover is provided with a circular hole, and the piston rod is coaxially passed through the circular hole and forms a gap sealing cooperation with the circular hole;The upper side of the inner wall of the circular hole in the center of the cylinder cover is provided with pressure groove I, and the pressure groove I is connected with the large cavity of the oil cylinder through communication component;The lower side of the inner wall of the circular hole in the center of the cylinder cover is provided with pressure groove II, and the cylinder cover is provided with a hole connecting the pressure groove II and the small cavity of the oil cylinder;The upper side of the piston is provided with pressure groove III, and the piston is provided with a hole connecting the pressure groove III and the small cavity of the oil cylinder;The lower side of the piston is provided with pressure groove IV, and the piston is provided with a hole connecting the pressure groove IV and the large cavity of the oil cylinder.

[0006] In some embodiments, a cut-off hole is provided on the piston, which communicates the large cavity of the oil cylinder and the small cavity of the oil cylinder.

[0007] In some embodiments, cut-off hole I and cut-off hole II are parallel to the center axis of the piston and are axisymmetric.

[0008] In some embodiments, the communication component is a hydraulic oil pipe;The cylinder cover is provided with a hole connecting the pressure groove I and the outside of the cylinder cover, and the hole is connected with the large cavity of the oil cylinder through the hydraulic oil pipe.

[0009] In some embodiments, the pressure groove I and the pressure groove II are both direction grooves.

[0010] In some embodiments, the pressure groove III and the pressure groove IV are both direction grooves.

[0011] The application provides a method for dynamically bearing lateral force in a second aspect, a pressure groove III is opened on the upper side of the cylinder surface of the piston of the oil cylinder, and the pressure groove III leads to the small cavity of the oil cylinder; a pressure groove IV is opened on the lower side of the cylinder surface of the piston of the oil cylinder, and the pressure groove IV leads to the large cavity of the oil cylinder; a pressure groove I is opened on the upper side of the inner wall of the circular hole in the center of the cylinder cover, and the pressure groove I leads to the large cavity of the oil cylinder; a pressure groove II is opened on the lower side of the inner wall of the circular hole in the center of the cylinder cover, and the pressure groove II leads to the small cavity of the oil cylinder; during the movement of the oil cylinder, the pressures in the four pressure grooves are different due to the different pressures of the large and small cavities of the oil cylinder, thereby the piston and the piston rod are driven to generate torque to bear the lateral force borne by the oil cylinder.

[0012] In some embodiments, when the oil cylinder is retracted, the oil cylinder rotates counterclockwise, the pressure of the large cavity is high, the pressure of the small cavity is low, the piston rod bears upward lateral force, the piston rod is inclined upward at the end cover, the piston is inclined downward in the cylinder barrel, the pressure in the pressure groove IV is high, the pressure in the pressure groove III is low, the piston is driven to move upward, the pressure in the pressure groove I is high, the pressure in the pressure groove II is low, the piston rod is driven to move downward, thereby resisting the lateral force; when the oil cylinder is extended, the oil cylinder rotates clockwise, the pressure of the large cavity is low, the pressure of the small cavity is high, the piston rod bears downward lateral force, the piston rod is inclined downward at the end cover, the piston is inclined upward in the cylinder barrel, the pressure in the pressure groove IV is low, the pressure in the pressure groove III is high, the piston is driven to move downward, the pressure in the pressure groove I is low, the pressure in the pressure groove II is high, the piston rod is driven to move upward, thereby resisting the lateral force.

[0013] The application provides an engineering machine in a third aspect, which is provided with the suspension oil cylinder for dynamically bearing lateral force.

[0014] In some embodiments, the engineering machine includes a mining dump truck.

[0015] The application has the following beneficial effects:

[0016] Due to the above scheme, the pressure in the pressure groove II is the same as the pressure of the small cavity of the oil cylinder, the pressure in the pressure groove III is the same as the pressure of the large cavity of the oil cylinder, the pressure in the pressure groove I is the same as the pressure of the large cavity of the oil cylinder, and the pressure in the pressure groove IV is the same as the pressure of the small cavity of the oil cylinder; during the movement of the oil cylinder, the pressures of the large and small cavities of the oil cylinder are different, the pressures in the pressure grooves drive the piston and the piston rod to generate torque to resist the lateral force generated by external force. Therefore, the application has the characteristics of dynamically bearing lateral force. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are part of the present application, serve to provide further understanding of the present application, and the schematic embodiments of the present application and the descriptions thereof serve to explain the present application, but do not constitute undue limitations on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] In the drawings:

[0019] Figure 1 A schematic diagram of a suspension oil cylinder structure for dynamically bearing lateral force of the present application;

[0020] Figure 2 A schematic diagram of force bearing when the suspension oil cylinder of the present application is retracted;

[0021] Figure 3 A schematic diagram of force bearing when the suspension oil cylinder of the present application is extended.

[0022] In the drawings: 1, cylinder barrel, 2, piston, 3, piston rod, 4, hydraulic oil pipe, 5, cylinder cover, 6, pressure groove II, 7, pressure groove I, 8, cut-off hole II, 9, pressure groove IV, 10, pressure groove III, 11, cut-off hole I.

[0023] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0025] In the description of the present application, it should be noted that the terms “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the description of the present application, it should be noted that unless otherwise expressly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As shown in Figure 1 , a suspension oil cylinder for dynamically bearing lateral force, comprising a cylinder barrel 1, a piston 2, a piston rod 3, a hydraulic oil pipe 4 and a cylinder cover 5.

[0028] The piston 2 is coaxially fixedly connected to the left end of the piston rod 3; the piston 2 is coaxially installed in the cylinder barrel 1, the left side of the piston 2 is an oil cylinder large cavity, and the right side of the piston 2 is an oil cylinder small cavity; the right side of the cylinder barrel 1 is coaxially fixedly installed with the cylinder cover 5; the center of the cylinder cover 5 is provided with a circular hole, the piston rod 3 is coaxially passed through the circular hole and forms a gap sealing cooperation with the circular hole.

[0029] A square pressure groove I 7 is opened on the upper side of the inner wall of the circular hole in the center of the cylinder cover 5, and a hole is opened in the cylinder cover 5 to connect the pressure groove I 7 and the outside of the cylinder cover 5, which is connected with the oil cylinder large cavity through the hydraulic oil pipe 4. A square pressure groove II 6 is opened on the lower side of the inner wall of the circular hole in the center of the cylinder cover 5, and a hole is opened in the cylinder cover 5 to connect the pressure groove II 6 and the oil cylinder small cavity.

[0030] A square pressure groove III 10 is opened on the upper side of the cylindrical surface of the piston 2, and a hole is opened in the piston 2 to connect the pressure groove III 10 and the oil cylinder small cavity. A square pressure groove IV 9 is opened on the lower side of the cylindrical surface of the piston 2, and a hole is opened in the piston 2 to connect the pressure groove IV 9 and the oil cylinder large cavity.

[0031] The cross hole I 11 and the cross hole II 8 are opened in parallel with and axially symmetric to the central axis of the piston 2.

[0032] Due to the above-mentioned scheme, in this case, when the oil cylinder is retracted, as shown in Figure 2 , the oil cylinder rotates counterclockwise, the large cavity pressure is high, the small cavity pressure is low, the piston rod 3 bears upward lateral force, the piston rod 3 is inclined upward at the end cover, the piston 2 is inclined downward in the cylinder barrel 1, the pressure groove IV 9 is high pressure, the pressure groove III 10 is low pressure, the piston 2 is pushed to move upward, the pressure groove I 7 is high pressure, the pressure groove II 6 is low pressure, the piston rod 3 is pushed to move downward, thereby resisting the lateral force. When the oil cylinder is extended, the oil cylinder rotates clockwise, as shown in Figure 3As shown, the large cavity pressure is low, the small cavity pressure is high, the piston rod 3 bears the downward lateral force, the piston rod 3 is inclined downward at the end cover, the piston 2 is inclined upward in the cylinder 1, the pressure groove IV 9 is low in pressure, the pressure groove III 10 is high in pressure, the piston 2 is pushed to move downward, the pressure groove I 7 is low in pressure, the pressure groove II 6 is high in pressure, the piston rod 3 is pushed to move upward, and further resist the lateral force.

[0033] In the description provided herein, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

[0034] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments but not others, combinations of features of different embodiments are also meant to be within the scope of the present application and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0035] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiments, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments without departing from the scope of the technical solutions of the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, which does not depart from the content of the technical solutions of the present application, still belongs to the scope of the present application.

Claims

1. A suspension cylinder for dynamically bearing lateral forces, characterized in that: This includes the cylinder, piston, piston rod, and cylinder head; The piston is coaxially and fixedly connected to the left end of the piston rod; The piston is coaxially mounted inside the cylinder, with the large cylinder chamber on the left side of the piston and the small cylinder chamber on the right side of the piston. The cylinder head is coaxially fixedly mounted on the right side of the cylinder barrel; The cylinder head has a circular hole in the center, and the piston rod passes through the circular hole coaxially, forming a gap seal with the circular hole; A pressure groove I is opened on the upper side of the inner wall of the circular hole in the center of the cylinder head. The pressure groove I is connected to the large cavity of the oil cylinder through a connecting component. A pressure groove II is opened on the lower side of the inner wall of the circular hole in the center of the cylinder head, and a hole is opened in the cylinder head to connect the pressure groove II and the small cavity of the oil cylinder. The piston has a pressure groove Ⅲ on its upper cylindrical surface, and the piston also has a hole connecting the pressure groove Ⅲ and the small chamber of the oil cylinder. The piston has a cylindrical pressure groove IV on its lower side, and the piston also has a hole connecting the pressure groove IV and the large chamber of the oil cylinder. The piston is provided with a flow-cutting hole that connects the large chamber of the oil cylinder and the small chamber of the oil cylinder; The connecting component is a hydraulic oil pipe; the cylinder head has a hole that connects the pressure groove I and the outside of the cylinder head, and this hole is connected to the large cavity of the oil cylinder through the hydraulic oil pipe.

2. The suspension cylinder for dynamically bearing lateral forces according to claim 1, characterized in that: Two flow-cutting holes, I and II, are opened parallel to and axially symmetrical to the piston's central axis.

3. The suspension cylinder for dynamically bearing lateral forces according to claim 1, characterized in that: Both pressure groove I and pressure groove II are square grooves.

4. The suspension cylinder for dynamically bearing lateral forces according to claim 1, characterized in that: Both pressure groove III and pressure groove IV are square grooves.

5. A method for dynamically bearing lateral forces, characterized in that: A pressure groove Ⅲ is formed on the upper cylindrical surface of the piston in the oil cylinder, which leads to the small cavity of the oil cylinder. A pressure groove Ⅳ is formed on the lower cylindrical surface of the piston in the oil cylinder, which leads to the large cavity of the oil cylinder. A pressure groove I is opened on the upper side of the inner wall of the circular hole in the center of the cylinder head, which leads to the large cavity of the oil cylinder. A pressure groove II is opened on the lower side of the inner wall of the circular hole in the center of the cylinder head, which leads to the small cavity of the oil cylinder. During the movement of the hydraulic cylinder, the pressure difference between the large and small chambers of the hydraulic cylinder leads to different pressures in the four pressure grooves, which in turn pushes the piston and piston rod to generate torque to bear the lateral force borne by the hydraulic cylinder. When the cylinder retracts, it rotates counterclockwise. The pressure in the large chamber is high, and the pressure in the small chamber is low. The piston rod is subjected to an upward lateral force. The piston rod tilts upward at the end cover, and the piston deflects downward inside the cylinder. Pressure groove IV is high pressure, and pressure groove III is low pressure, which pushes the piston upward. Pressure groove I is high pressure, and pressure groove II is low pressure, which pushes the piston rod downward, thereby resisting the lateral force. When the hydraulic cylinder extends, it rotates clockwise. The pressure in the large chamber is low, and the pressure in the small chamber is high. The piston rod is subjected to a downward lateral force. The piston rod tilts downward at the end cover, and the piston tilts upward inside the cylinder. Pressure groove IV is at low pressure, and pressure groove III is at high pressure, which pushes the piston downward. Pressure groove I is at low pressure, and pressure groove II is at high pressure, which pushes the piston rod upward, thereby resisting the lateral force.

6. An engineering machinery, characterized in that: The suspension cylinder is equipped with a dynamic lateral force bearing system as described in any one of claims 1 to 4.

7. The engineering machinery according to claim 6, characterized in that: The engineering machinery includes mining dump trucks.

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