A new type of dual-function cylinder

Abstract

The utility model discloses a novel dual-function oil cylinder, which relates to the technical field of oil cylinders for steering rear axles of trailers, including a cylinder barrel, and also including: a left oil cylinder sleeve and a right oil cylinder sleeve arranged at both ends of the cylinder barrel, a push rod that is interference-fitted with the inner walls of the left oil cylinder sleeve and the right oil cylinder sleeve, a piston sleeve that is sleeved on the outer peripheral surface of the push rod and is interference-fitted with the inner wall of the cylinder barrel, and two oil through ports that are respectively arranged on the outer peripheral surfaces of both ends of the cylinder barrel, and the piston sleeve divides the hollow inside of the cylinder barrel into two left and right chambers. In the utility model, by switching the electromagnetic reversing valve, specifically when the left oil through port is inlet and the right oil through port is outlet, the vehicle can complete the steering, and vice versa. After changing the flow direction of the hydraulic oil, the self-steering axle and the power steering axle can be freely switched. When the self-steering axle is used during normal driving, when power steering is required, the switching can be realized in the cab by simply switching the oil circuit with the electromagnetic reversing valve, which is convenient and quick.

Description

Technical Field

[0001] The utility model relates to the technical field of a steering oil cylinder for a rear axle of a trailer, in particular to a novel double-function oil cylinder. Background Art

[0002] In order to reduce the turning radius or reduce the wear on the tires when turning, one or both of the rear axles of the trailer are designed as self-steering axles or power-steering axles. When the vehicle is moving forward, the self-steering axle will turn to a certain angle as the vehicle turns under the action of ground friction, reducing the wear on the tires when turning. However, when making sharp turns or on narrow roads, the steering angle of the self-steering axle often cannot meet the steering requirements. At this time, power steering is required to force the rear wheels to obtain a larger steering angle.

[0003] Whether it is a self-steering axle or a power-steering axle, a cylinder needs to be installed on the bridge. For a self-steering axle, the function of the cylinder is to force the tires to return to the center when the trailer is reversing; for a power-steering axle, the function of the cylinder is to provide steering power and force the tires to turn when steering is required.

[0004] Self-steering axle and power-steering axle each have their own advantages, but the current design of trailer steering axle can only choose one of them, either self-steering axle or power-steering axle, and it is not possible to switch freely between self-steering axle and power-steering axle. For this reason, we propose a new dual-function cylinder. Utility Model Content

[0005] The main purpose of the utility model is to provide a novel dual-function oil cylinder to solve the problem that the current design of the steering axle of the trailer can only choose one, either a self-steering axle or a power-steering axle, and cannot freely switch between the self-steering axle and the power-steering axle.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions: a novel dual-function oil cylinder, comprising a cylinder barrel, and also comprising: a left oil cylinder sleeve and a right oil cylinder sleeve arranged at both ends of the cylinder barrel, a push rod which is interference-fitted with the inner walls of the left oil cylinder sleeve and the right oil cylinder sleeve, a piston sleeve which is sleeved on the outer circumferential surface of the push rod and is interference-fitted with the inner wall of the cylinder barrel, and two oil through ports which are respectively arranged on the outer circumferential surfaces at both ends of the cylinder barrel, wherein the piston sleeve divides the hollow inside of the cylinder barrel into two left and right chambers;

[0007] Preferably, the end surfaces of the left cylinder sleeve and the right cylinder sleeve located outside the cylinder barrel are both provided with ball head pull rods.

[0008] Preferably, each of the oil passages is connected to an external electromagnetic reversing valve through a pipeline, and the external electromagnetic reversing valve mainly helps the pipeline to cooperate with the oil passage to change the flow direction of the oil entering the cylinder chamber.

[0009] Preferably, the two oil ports are connected to the left and right chambers respectively.

[0010] Preferably, the cylinder barrel, the left cylinder sleeve, the right cylinder sleeve and the push rod are all located on the same central axis.

[0011] Preferably, the oil passage port and the cylinder barrel are arranged perpendicular to each other.

[0012] Compared with the prior art, the utility model provides a novel dual-function oil cylinder, which has the following beneficial effects:

[0013] 1. In the utility model, the rear axle of the trailer is used as a self-steering axle. When the vehicle is moving forward normally, the push rod moves left and right with the steering direction of the vehicle; when the vehicle needs to reverse and the wheels need to be centered, oil is simultaneously introduced into the two oil ports, and the oil pushes the left cylinder sleeve and the right cylinder sleeve to move to both sides, wherein the left cylinder sleeve first contacts the ball head tie rod, driving the entire ball head tie rod to move to the left until it is centered. At this time, the wheel is centered and the vehicle can reverse. This is the left-side centering principle, and vice versa, the right-side centering principle is also true. The rear axle of the trailer is used as a self-steering axle and the wheel is centered, which is flexible to operate.

[0014] 2. When the vehicle needs to switch from a self-steering axle to a power-steering axle, the driver only needs to switch the electromagnetic reversing valve in the cab. Specifically, when the left oil port is inlet and the right oil port is outlet, the vehicle can complete the steering. Vice versa, after changing the flow direction of the hydraulic oil, the self-steering axle and the power-steering axle can be switched freely. When the self-steering axle is used for normal driving, when power-steering is needed, the switch can be realized in the cab by simply switching the electromagnetic reversing valve to switch the oil circuit, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0016] Figure 1 This is a schematic diagram of the internal structure of a novel dual-function oil cylinder of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure and oil flow direction of a new type of dual-function oil cylinder used as a self-steering axle in the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the internal structure and oil flow direction of a new type of dual-function oil cylinder used as a power steering axle.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Cylinder barrel;

[0021] 2. Left cylinder sleeve;

[0022] 3. Putting;

[0023] 4. Right cylinder sleeve;

[0024] 5. Piston sleeve;

[0025] 6. Oil port;

[0026] 7. Ball head pull rod. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 an indirect connection 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 the present invention can be understood according to specific circumstances. Example

[0030] like Figure 1 as well as Figure 2 As shown, a novel dual-function oil cylinder comprises a cylinder barrel, and also comprises: a left oil cylinder sleeve and a right oil cylinder sleeve arranged at both ends of the cylinder barrel, a push rod which is interference-fitted with the inner walls of the left oil cylinder sleeve and the right oil cylinder sleeve, a piston sleeve which is sleeved on the outer circumference of the push rod and is interference-fitted with the inner wall of the cylinder barrel, and two oil through ports which are respectively arranged on the outer circumferences of both ends of the cylinder barrel, wherein the piston sleeve divides the hollow inside of the cylinder barrel into two left and right chambers;

[0031] Preferably, the end surfaces of the left cylinder sleeve and the right cylinder sleeve located outside the cylinder barrel are both provided with ball head pull rods.

[0032] Preferably, each of the oil passages is connected to an external electromagnetic reversing valve through a pipeline, and the external electromagnetic reversing valve mainly helps the pipeline to cooperate with the oil passage to change the flow direction of the oil entering the cylinder chamber.

[0033] Preferably, the two oil ports are connected to the left and right chambers respectively.

[0034] Preferably, the cylinder barrel, the left cylinder sleeve, the right cylinder sleeve and the push rod are all located on the same central axis.

[0035] Preferably, the oil passage port and the cylinder barrel are arranged perpendicular to each other.

[0036] Oil enters through two oil ports at the same time, and the oil pushes the left cylinder sleeve and the right cylinder sleeve to move to both sides. The left cylinder sleeve first contacts the ball head tie rod, driving the entire ball head tie rod to move to the left until it is centered. At this time, the wheel is centered and the vehicle can reverse. Example

[0037] like Figure 1 as well as Figure 3 As shown, a novel dual-function oil cylinder comprises a cylinder barrel, and also comprises: a left oil cylinder sleeve and a right oil cylinder sleeve arranged at both ends of the cylinder barrel, a push rod which is interference-fitted with the inner walls of the left oil cylinder sleeve and the right oil cylinder sleeve, a piston sleeve which is sleeved on the outer circumference of the push rod and is interference-fitted with the inner wall of the cylinder barrel, and two oil through ports which are respectively arranged on the outer circumferences of both ends of the cylinder barrel, wherein the piston sleeve divides the hollow inside of the cylinder barrel into two left and right chambers;

[0038] Preferably, the end surfaces of the left cylinder sleeve and the right cylinder sleeve located outside the cylinder barrel are both provided with ball head pull rods.

[0039] Preferably, each of the oil passages is connected to an external electromagnetic reversing valve through a pipeline, and the external electromagnetic reversing valve mainly helps the pipeline to cooperate with the oil passage to change the flow direction of the oil entering the cylinder chamber.

[0040] Preferably, the two oil ports are connected to the left and right chambers respectively.

[0041] Preferably, the cylinder barrel, the left cylinder sleeve, the right cylinder sleeve and the push rod are all located on the same central axis.

[0042] Preferably, the oil passage port and the cylinder barrel are arranged perpendicular to each other.

[0043] When oil is taken in through the left oil port and returned through the right oil port, the vehicle can complete steering, and vice versa. After changing the flow direction of the hydraulic oil, the self-steering axle and the power-steering axle can be switched freely.

[0044] The following is the working principle of the utility model:

[0045] The rear axle of the trailer is used as a self-steering axle. When the vehicle is driving forward normally, the push rod moves left and right with the steering direction of the vehicle; when the vehicle needs to reverse and the wheels need to be centered, oil is introduced into the two oil ports at the same time, and the oil pushes the left cylinder sleeve and the right cylinder sleeve to move to both sides. The left cylinder sleeve first contacts the ball head tie rod, driving the entire ball head tie rod to move to the left until it is centered. At this time, the wheel is centered and the vehicle can reverse. This is the left-side centering principle, and the right-side centering principle is the same. When the vehicle needs to switch from a self-steering axle to a power-steering axle, the driver only needs to switch the solenoid reversing valve in the cab. Specifically, when oil is introduced into the left oil port and oil is returned to the right oil port, the vehicle can complete the steering, and vice versa.

[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel dual-function oil cylinder, comprising a cylinder barrel (1), characterized in that: Also includes: A left oil cylinder sleeve (2) and a right oil cylinder sleeve (4) are arranged at both ends of the cylinder barrel (1); a push rod (3) which is interference-fitted with the inner walls of the left oil cylinder sleeve (2) and the right oil cylinder sleeve (4); a piston sleeve (5) which is sleeved on the outer circumference of the push rod (3) and is interference-fitted with the inner wall of the cylinder barrel (1); and two oil passages (6) which are respectively arranged on the outer circumferences of both ends of the cylinder barrel (1); the piston sleeve (5) divides the hollow interior of the cylinder barrel (1) into two left and right chambers; 2. A novel dual-function oil cylinder according to claim 1, characterized in that: The end surfaces of the left oil cylinder sleeve (2) and the right oil cylinder sleeve (4) located outside the cylinder barrel (1) are both provided with ball head pull rods (7).

3. A novel dual-function oil cylinder according to claim 1, characterized in that: Each of the oil passage ports (6) is connected to an external electromagnetic reversing valve via a pipeline.

4. A novel dual-function oil cylinder according to claim 1, characterized in that: The two oil passages (6) are respectively communicated with the left and right chambers.

5. A novel dual-function oil cylinder according to claim 1, characterized in that: The cylinder barrel (1), the left cylinder sleeve (2), the right cylinder sleeve (4) and the push rod (3) are all located on the same central axis.

6. A novel dual-function oil cylinder according to claim 1, characterized in that: The oil passage port (6) and the cylinder barrel (1) are arranged perpendicular to each other.

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