Buffering spacer bush device of oil cylinder

Abstract

The utility model relates to an oil cylinder buffering spacer bush device, and belongs to the technical field of hydraulic cylinders. Comprising a piston rod, a cylinder barrel, a buffering spacer bush, an oil pipe and a piston, the buffering spacer bush is assembled on the piston rod and arranged in the cylinder barrel, grooves are formed in the buffering spacer bush and the piston rod, an oil passing groove is formed in one end of the buffering spacer bush, and oil enters the grooves of the buffering spacer bush through the oil pipe to push the piston to move. Oil flows into the oil passing groove and enters the rod cavity to push the whole piston rod to stretch. The buffer device has the advantages that the buffer device is arranged on the spacer bush, the buffer device can stably move when the oil cylinder fully extends, the buffer effect is achieved, and the buffer effect is remarkable. The structure is simple, stable, reliable and high in safety; the groove is designed at the outer circle of the buffer spacer bush, the overflowing area is reduced, the stepped groove is designed at the inner circle of one end in contact with the piston, positioning of the buffer spacer bush is facilitated, the layout is simple, and the structure is stable and reliable.

Description

Technical Field

[0001] The utility model relates to an oil cylinder buffer spacer device, belonging to the technical field of hydraulic cylinders. Background Art

[0002] In modern mechanical equipment, hydraulic cylinders are important hydraulic actuators with a high frequency of use. The cylinders meet the user's requirements by controlling the extension and retraction of the piston rod. However, as user requirements increase, the hydraulic cylinders also have the need to run smoothly when starting and fully extended. When the hydraulic cylinder moves to the end of the stroke, it has a large kinetic energy. If it is not decelerated, the hydraulic cylinder piston and the guide sleeve are prone to mechanical collision, resulting in impact and noise, which is extremely destructive. In order to prevent and mitigate this hazard, it is necessary to design a buffer device with this function. The buffer device of the current common oil cylinder has a relatively complex structure, and usually needs to be adjusted through a one-way valve and a throttle valve, or it is necessary to design a buffer plunger with an axial triangular groove and other structures to play a buffering role. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a spacer structure having a buffering effect, which has a simple structure, a wide range of applications, and is safe and reliable.

[0004] The utility model is realized through the following technical scheme: a cylinder buffer sleeve device, comprising a piston rod, a cylinder barrel, a buffer sleeve, an oil pipe and a piston, the buffer sleeve is assembled on the piston rod, the buffer sleeve is arranged in the cylinder barrel, the buffer sleeve and the piston rod are arranged with grooves, one end of the buffer sleeve is provided with an oil groove, the oil enters the groove of the buffer sleeve through the oil pipe, pushes the piston to move, and the oil flows into the oil groove and enters the rod cavity to push the piston rod to retract and extend as a whole.

[0005] A gap is left between the cylinder barrel and the buffer spacer.

[0006] The gap between the cylinder and the buffer spacer is 0.2 mm.

[0007] The material of the buffer spacer is QT500-7.

[0008] The groove is arranged on the outer circle of the buffer sleeve, and the groove is arranged on the inner circle of one end of the buffer sleeve contacting with the piston.

[0009] The beneficial effects of the utility model are: the buffer device is designed on the spacer, which can move smoothly when the oil cylinder is fully extended, and plays a buffering role with significant buffering effect. The structure is simple, stable and reliable, and the safety is high; the outer circle of the buffer spacer is designed with grooves to reduce the flow area, and the inner circle of the end in contact with the piston is designed with stepped grooves to help position the buffer spacer, the layout is simple, and the structure is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below based on the drawings and embodiments.

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1. piston rod; 2. cylinder barrel; 3. buffer sleeve; 4. oil pipe; 5. piston; 6. oil groove. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0015] like Figure 1 The oil cylinder buffer sleeve device shown includes a piston rod 1, a cylinder barrel 2, a buffer sleeve 3, an oil pipe 4 and a piston 5. The buffer sleeve 3 is assembled on the piston rod 1, and the buffer sleeve 3 is arranged in the cylinder barrel 2. The buffer sleeve 3 and the piston rod 1 are arranged with grooves. One end of the buffer sleeve 3 is provided with an oil groove 6. The oil enters the groove of the buffer sleeve 3 through the oil pipe 4, pushing the piston 5 to move. The oil flows into the oil groove 6 and enters the rod cavity to push the piston rod 1 to retract and retract as a whole.

[0016] A gap is left between the cylinder barrel 2 and the buffer spacer 3 .

[0017] The gap between the cylinder 2 and the buffer spacer 3 is 0.2 mm.

[0018] The material of the buffer spacer 3 is QT500-7. This ductile iron material has good toughness and can effectively prevent cylinder pulling while maintaining a small tolerance with the cylinder barrel.

[0019] The groove is arranged on the outer circle of the buffer sleeve 3 , and the groove is arranged on the inner circle of the end of the buffer sleeve 3 that contacts the piston 5 .

[0020] When the oil first enters the spacer groove through the oil pipe 4, it pushes the piston 5 to move, and then the oil flows into the oil groove 6 and enters the rod chamber to push the piston rod 1 to expand and contract as a whole, effectively reducing the oil flow area, so the spacer will achieve a buffering effect. The oil cylinder moves smoothly when it is started and fully extended, without transmission clearance, which eliminates the need to design a deceleration device and achieves a buffering effect. The flow area decreases as the buffer stroke increases, so that the piston 5 runs evenly during the buffering process, with small impact and high braking accuracy.

[0021] Finally, it should be noted that the above is only 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 can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylinder buffer spacer device, characterized in that: The invention comprises a piston rod (1), a cylinder (2), a buffer sleeve (3), an oil pipe (4) and a piston (5), wherein the buffer sleeve (3) is assembled on the piston rod (1), the buffer sleeve (3) is arranged in the cylinder (2), the buffer sleeve (3) and the piston rod (1) are connected by a groove, an oil groove (6) is arranged at one end of the buffer sleeve (3), oil enters the groove of the buffer sleeve (3) through the oil pipe (4), pushes the piston (5) to move, and the oil flows into the oil groove (6) and enters the rod cavity to push the piston rod (1) to extend and retract as a whole.

2. The oil cylinder buffer spacer device according to claim 1, characterized in that: A gap is left between the cylinder barrel (2) and the buffer sleeve (3).

3. The oil cylinder buffer sleeve device according to claim 2, characterized in that: The gap between the cylinder barrel (2) and the buffer spacer (3) is 0.2 mm.

4. The oil cylinder buffer spacer device according to claim 1, characterized in that: The material of the buffer sleeve (3) is QT500-7.

5. The oil cylinder buffer spacer device according to claim 1, characterized in that: The groove is arranged on the outer circumference of the buffer sleeve (3), and the groove is arranged on the inner circumference of the end of the buffer sleeve (3) that contacts the piston (5).

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