Feeding oil cylinder with buffer device

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a feeding oil cylinder with a buffer device, which comprises a cylinder body and an output shaft inserted in the cylinder body and sliding along the axial direction of the cylinder body, the piston is connected to the end, located in the cylinder body, of the output shaft; the blocking block is arranged at the end, close to the bottom of the cylinder body, of the piston, and the blocking block is matched with the bottom of the cylinder body to achieve buffering; the front buffer is arranged at the end, close to the opening of the cylinder body, of the piston, and the front buffer is matched with the opening end of the cylinder body to achieve buffering. The buffering device of the feeding oil cylinder is optimized, the labor intensity of field workers is reduced, the equipment operation cost and the failure rate are reduced, the service life of the oil cylinder is prolonged, and the operation precision of the oil cylinder is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic cylinders, in particular to a feeding oil cylinder with a buffer device. BACKGROUND

[0002] When the piston rod or plunger rod of a hydraulic cylinder moves under the drive of hydraulic pressure, it has a large momentum, and if there is no buffer device to slow down the speed, it will directly mechanically collide with the end cover or cylinder bottom when it moves to the end of the stroke, especially when the rod head enters the end cover and the cylinder bottom part. Such a collision can produce a great impact and noise, thereby seriously affecting the strength and normal work of the hydraulic cylinder and the entire hydraulic system. Equipment damage and processing precision decline caused by mechanical collision and impact will increase the maintenance cost of the equipment, and frequent maintenance will also affect the production progress and efficiency.

[0003] In actual production, the feeding oil cylinder is used as a power device for the movement of sludge feeding, and when the feeding hydraulic cylinder reaches the limit position of the stroke, due to inertia and flow changes, vibration and noise phenomena will occur, which not only damages the hydraulic cylinder itself, but also greatly affects the working precision of the equipment. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the present application is that the existing oil cylinder has a piston that collides with the cylinder bottom or end cover during operation, resulting in a decrease in the service life of the equipment and poor operation precision.

[0005] Therefore, the present application provides a feeding oil cylinder with a buffer device, which optimizes the buffer device of the feeding oil cylinder, reduces the labor intensity of field workers, reduces equipment operating costs and failure rates, improves the service life of the oil cylinder, and improves the operation precision of the oil cylinder.

[0006] The technical solution adopted by the present application to solve its technical problem is:

[0007] A feeding oil cylinder with a buffer device, comprising,

[0008] a cylinder body, and an output shaft inserted in the cylinder body and sliding along the axial direction of the cylinder body;

[0009] a piston connected to one end of the output shaft located in the cylinder body;

[0010] a block provided at one end of the piston close to the bottom of the cylinder body, the block and the bottom of the cylinder body cooperating to achieve buffering;

[0011] a front buffer provided at one end of the piston close to the opening of the cylinder body, the front buffer and one end of the opening of the cylinder body cooperating to achieve buffering.

[0012] Further, the open end of the cylinder is threadedly connected with an upper cover, the piston and the upper cover form a second oil cavity, the front buffer has a diameter larger than that of the output shaft and smaller than that of the piston, and the upper cover is provided with a slot for inserting the front buffer.

[0013] Further, the front buffer is made of 45 steel.

[0014] Further, the upper cover is connected with a dust cover away from the cylinder, and the output shaft penetrates the upper cover and the dust cover.

[0015] Further, the bottom of the cylinder is connected with a base through a flange, the piston and the base form a first oil cavity, the plug is threadedly connected to one end of the piston close to the base, and the plug is inserted and matched with the base.

[0016] Further, the end of the plug towards the base is tapered.

[0017] Further, the base is provided with a check valve and a throttle valve.

[0018] Further, the piston and the inner side wall of the cylinder are provided with a hole retainer and a guide belt, and the hole retainer and the guide belt are embedded on the outer side wall of the piston.

[0019] The beneficial effects of the utility model are that, by setting the plug, the front buffer and other related components, and optimizing the structure size of the upper cover and the cavity of the upper cover, the piston can avoid impacting the upper cover and the base during the movement of the hydraulic oil cylinder, so as to avoid phenomena such as vibration and noise, protect the related components of the hydraulic oil cylinder from being damaged, reduce noise, improve the service life of the oil cylinder, ensure the stable operation of the hydraulic system, and improve the operation precision of the oil cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model is further described below in combination with the drawings and examples.

[0021] Figure 1 It is a structure schematic view of the feed oil cylinder with a buffer device in the utility model.

[0022] Figure 2 It is a schematic view in the state that the output shaft is stretched out.

[0023] In the drawing: 1, cylinder; 2, output shaft; 3, piston; 4, upper cover; 5, dust cover; 6, guide belt; 7, fluorine rubber; 8, dust ring; 9, base; 10, flange; 11, first oil cavity; 12, second oil cavity; 13, throttle valve; 14, check valve; 15, plug; 16, front buffer; 17, hole retainer; 18, slot. DETAILED DESCRIPTION

[0024] The utility model will be further described in detail in connection with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.

[0025] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0026] In the description of the utility model, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, 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 an intermediate medium, or the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] A feed oil cylinder with a buffer device, comprising a cylinder body 1, an output shaft 2 and a piston 3.

[0028] The output shaft 2 is inserted in the cylinder body 1, and the piston 3 is connected to one end of the output shaft 2 in the cylinder body 1, and the piston 3, the output shaft 2 and the cylinder body 1 are coaxially arranged and linearly move along the axial direction of the cylinder body 1.

[0029] Specifically, the open end of the cylinder body 1 is threadedly connected with an upper cover 4, the end of the upper cover 4 away from the cylinder body 1 is connected with a dust cover 5, the output shaft 2 penetrates through the upper cover 4 and the dust cover 5, the inner side wall of the upper cover 4 is provided with a guide belt 6 and a fluorine rubber 7, the fluorine rubber 7 sealing element can effectively prevent hydraulic oil leakage, and ensure the working stability and safety of the system. The inner side wall of the dust cover 5 is provided with a dust ring 8, which has good scraping dust removal effect, and can prevent residual oil film from extending on the output shaft 2.

[0030] The bottom of the cylinder 1 is connected with the base 9 through the flange 10, the piston 3 and the base 9 form the first oil cavity 11, and the piston 3 and the upper cover 4 form the second oil cavity 12. The base 9 is provided with a one-way valve 14 and a throttle valve 13. The piston 3 is provided with a plug 15 and a front buffer 16, the plug 15 is threadedly connected to one end of the piston 3 close to the base 9, the plug 15 is inserted and matched with the base 9, the front buffer 16 is connected between the piston 3 and the output shaft 2, the output shaft 2 is connected with the front buffer 16 through the shaft shoulder, the material of the front buffer 16 is 45 steel, the diameter of the front buffer 16 is greater than that of the output shaft 2 and less than that of the piston 3, and the upper cover 4 is provided with a slot 18 for inserting the front buffer 16.

[0031] It should be noted that the end of the plug 15 close to the base 9 is tapered, the gap between the plug 15 and the base 9 changes with the displacement, that is, the throttling area decreases with the increase of the displacement, so as to effectively slow down the kinetic energy of the piston 3.

[0032] The piston 3 and the inner wall of the cylinder 1 are provided with a hole retainer 17 and a guide belt 6, the hole retainer and the guide belt 6 are embedded on the outer wall of the piston 3, the hole retainer 17 and the guide belt 6 can prevent the cylinder and the piston 3 from being worn and slow down the loss of particles to the oil cylinder and the sealing element, and have excellent wear resistance and good dry mobility characteristics.

[0033] The implementation principle of the application is:

[0034] During the pushing process of the hydraulic oil cylinder, the second oil cavity 12 is formed between the piston 3 and the upper cover 4, due to the incompressibility of the hydraulic oil, the hydraulic oil in the second oil cavity 12 absorbs the impact, the front buffer 16 slowly inserts into the slot 18, so as to avoid the mutual collision of the piston 3 and the upper cover 4 and prevent vibration and noise. During the retraction process of the hydraulic oil cylinder, the plug 15 inserts into the flange 10, the first oil cavity 11 is blocked, the hydraulic oil can only flow out from the throttle valve 13, the opening degree of the throttle valve 13 can be adjusted to control the oil return amount, so as to control the buffering speed of the piston 3 and avoid the collision between the piston 3 and the flange 10. The one-way valve 14 can quickly supply oil to the piston 3 when the hydraulic oil cylinder is pushed out, so as to avoid the insufficient thrust of the piston 3 and the slow or difficult starting phenomenon.

[0035] The plug 15, the front buffer 16 and other related components are arranged, the structure size of the upper cover 4 and the cavity of the upper cover 4 is optimized, so that the vibration, noise and other phenomena are avoided during the movement of the hydraulic oil cylinder.

[0036] The buffer device is arranged on the hydraulic cylinder, which can effectively slow down the movement speed of the moving part, avoid the impact on the hydraulic end cover, protect the related components of the hydraulic oil cylinder from being damaged, reduce the noise, and ensure the stable operation of the hydraulic system.

[0037] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined by the scope of the claims.

Claims

1. A feed cylinder with a buffer device, characterized in that, include, Cylinder body (1), and output shaft (2) inserted in cylinder body (1) and sliding along cylinder body (1) axis; Piston (3), the piston (3) is connected to one end of the output shaft (2) located inside the cylinder (1); A plug (15) is provided at one end of the piston (3) near the bottom of the cylinder (1), and the plug (15) cooperates with the bottom of the cylinder (1) to achieve buffering. A front buffer (16) is provided at one end of the piston (3) near the opening of the cylinder (1). The front buffer (16) and the opening of the cylinder (1) cooperate with each other to achieve buffering.

2. The feed cylinder with a buffer device according to claim 1, characterized in that, The cylinder (1) has a threaded connection to the top cover (4) at the open end. A second oil chamber (12) is formed between the piston (3) and the top cover (4). The diameter of the front buffer (16) is larger than the diameter of the output shaft (2) and smaller than the diameter of the piston (3). The top cover (4) is provided with a slot (18) for the front buffer (16) to be inserted.

3. The feed cylinder with a buffer device according to claim 1, characterized in that, The front buffer (16) is made of 45 steel.

4. The feed cylinder with a buffer device according to claim 2, characterized in that, The upper cover (4) is connected to a dust cover (5) at the end away from the cylinder (1), and the output shaft (2) passes through the upper cover (4) and the dust cover (5).

5. The feed cylinder with a buffer device according to claim 1, characterized in that, The bottom of the cylinder (1) is connected to a base (9) via a flange (10). A first oil chamber (11) is formed between the piston (3) and the base (9). The plug (15) is threadedly connected to one end of the piston (3) near the base (9). The plug (15) and the base (9) are inserted into each other.

6. The feed cylinder with a buffer device according to claim 5, characterized in that, The end of the block (15) facing the base (9) is set in a conical shape.

7. The feed cylinder with a buffer device according to claim 5, characterized in that, The base (9) is equipped with a one-way valve (14) and a throttle valve (13).

8. The feed cylinder with a buffer device according to claim 1, characterized in that, A retaining ring (17) and a guide band (6) are provided between the piston (3) and the inner wall of the cylinder (1). The retaining ring and the guide band (6) are both embedded on the outer wall of the piston (3).

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