Controllable fine-tuning resistance oil cylinder

Abstract

The utility model provides a controllable fine-tuning resistance oil cylinder, which belongs to the technical field of resistance oil cylinders and comprises an oil cylinder body, a piston is slidably arranged in the oil cylinder body in a sealed manner, a piston rod is fixedly arranged at one end of the piston, and the piston divides the inside of the oil cylinder body into a rod cavity and a rodless cavity; two connecting shafts are rotationally arranged on the oil cylinder body, and dials and pinions are fixedly arranged on the outer surfaces of the two connecting shafts in a sleeving manner; two valve elements are rotationally arranged in the oil cylinder body in a sealed mode, the two valve elements are communicated with a rod cavity and a rodless cavity through communication ports formed in the oil cylinder body respectively, and each valve element is provided with a flow hole. Large gears are fixedly arranged at the tops of the two valve elements, and the large gears and the small gears are in one-to-one correspondence meshing transmission; in addition, an oil cylinder main loop is arranged in the oil cylinder body, an oil pool is fixedly installed in the oil cylinder body, the valve element is communicated with the oil cylinder main loop through a flow hole, and the oil cylinder main loop is communicated with the oil pool. According to the scheme, the dial can determine the flow at each moment, so that the sensitivity of manual control is improved, and the controllability is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of resistance cylinder technology, specifically relating to a controllable fine-tuning resistance cylinder. Background Technology

[0002] A resistance cylinder is a device that provides adjustable or stable resistance through the principle of hydraulic damping. It is widely used in fitness equipment, industrial machinery, structural vibration reduction, and medical rehabilitation equipment.

[0003] Existing methods for adjusting the resistance of hydraulic cylinders mostly involve controlling the rotation of an eccentric shaft to create a position, which in turn adjusts the valve size, thereby regulating the resistance of the hydraulic cylinder. However, the rotation angle of the eccentric shaft and the displacement are variable relationships, making it difficult to control the valve core manually. The process is also difficult to control by feel, lacking effective operability. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides a controllable fine-tuning resistance cylinder.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A controllable fine-tuning resistance cylinder includes a cylinder body. A piston is slidably and sealed within the cylinder body, and a piston rod is fixedly mounted at one end of the piston. The piston divides the interior of the cylinder body into a rod chamber and a rodless chamber. Two connecting shafts are rotatably mounted on the cylinder body, and a scale and a small gear are fixedly fitted onto the outer surface of each connecting shaft. Two valve cores are rotatably and sealed within the cylinder body, and the two valve cores communicate with the rod chamber and the rodless chamber respectively through a communication port opened in the cylinder body. Each valve core has a flow orifice. A large gear is fixedly mounted on the top of each of the two valve cores, and the large gear meshes with the small gear in a one-to-one manner. In addition, the cylinder body contains both a main cylinder circuit and an oil sump, and the valve cores communicate with the main cylinder circuit through the flow orifice. The main cylinder circuit is also connected to the oil sump.

[0007] Furthermore, the cylinder body is provided with a cover plate, and several countersunk screws are slidably arranged on the cover plate, the countersunk screws being threaded into the cylinder body.

[0008] Furthermore, a cylinder head is fixedly installed at one end of the cylinder body, and the piston rod extends in a sealed sliding manner to the outside of the cylinder body at the end away from the piston, and a piston rod upper block is fixedly installed thereon.

[0009] Furthermore, a sealing ring is provided on the outer surface of the valve core.

[0010] Furthermore, the oil tank contains high-temperature silicone oil.

[0011] This application has the following beneficial effects:

[0012] This solution uses the meshing of a small gear and a large gear to drive the rotation of the valve core, thereby adjusting the size of the flow orifice on the valve core that is actually used for connection, thus adjusting the resistance that the resistance cylinder can provide. At the same time, the dial in the solution will also determine the flow rate at each moment, which improves the sensitivity of manual control and greatly enhances operability. Attached Figure Description

[0013] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the oil tank location structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the main circuit structure of the hydraulic cylinder of this utility model;

[0017] Figure 4 This is a schematic diagram of the valve core position structure of this utility model;

[0018] Figure 5 This is a schematic diagram showing the connection between the main circuit of the hydraulic cylinder and the oil sump of this utility model;

[0019] Figure 6 This is a schematic diagram of the flow orifice structure of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Cylinder body; 2. Pinion; 3. Gear; 4. Cover plate; 5. Dial; 6. Main circuit of cylinder; 7. Piston rod; 8. Upper block of piston rod; 9. Countersunk screw; 10. Connecting shaft; 11. Cylinder head; 12. Valve core; 13. Connecting port; 14. Flow hole; 15. Piston; 16. Oil sump. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] like Figures 1-6As shown, the technical solution adopted by this utility model is as follows: a controllable fine-tuning resistance cylinder includes a cylinder body 1, a cylinder head 11 is installed at one end of the cylinder body 1, a piston 15 is sealed and slidably arranged inside the cylinder body 1, a piston rod 7 is fixedly arranged at one end of the piston 15, and the piston rod 7 extends in a sealed and slidable manner to the outside of the cylinder body 1 at the end away from the piston 15 and a piston rod upper block 8 is fixedly arranged thereon. The piston 15 divides the interior of the cylinder body 1 into a rod chamber and a rodless chamber.

[0024] Two connecting shafts 10 are rotatably mounted on the cylinder body 1. The outer surfaces of the two connecting shafts 10 are fixedly fitted with both a scale 5 and a pinion 2. Two valve cores 12 are rotatably mounted inside the cylinder body 1. Each valve core 12 has a sealing ring on its outer surface and a flow orifice 14. A communication port 13 is provided on the cylinder body 1, allowing communication between the valve cores 12 and the interior of the cylinder body 1. One valve core 12 communicates with the rodless chamber through the communication port 13, and the other valve core 12 communicates with the rod chamber through the communication port 13.

[0025] Each valve core 12 has a large gear 3 fixedly installed on its top. The large gear 3 corresponds one-to-one with the small gear 2, and each large gear 3 meshes with the corresponding small gear 2 for transmission.

[0026] The cylinder body 1 is provided with a cover plate 4, which serves a protective function. Several countersunk screws 9 are slidably installed on the cover plate 4. The countersunk screws 9 are threadedly engaged with the cylinder body 1, and the cover plate 4 can be fixed on the cylinder body 1 by means of the countersunk screws 9.

[0027] The cylinder body 1 contains both an oil sump 16 and a main cylinder circuit 6. The valve core 12 is connected to the main cylinder circuit 6 through a flow port 14, and the main cylinder circuit 6 is connected to the oil sump 16. The oil sump 16 contains high-temperature resistant silicone oil. The oil sump 16 is existing technology and will not be described in detail in this solution.

[0028] By rotating the valve core 12, the size of the orifice 14 used to transport the oil can be adjusted, thereby adjusting the resistance that the resistance cylinder can provide.

[0029] Working principle: such as Figure 4 As shown, when the piston 15 moves to the right, the hydraulic oil in the rodless chamber will enter the right valve core 12 through the right connecting port 13, and enter the main circuit 6 of the cylinder through the flow hole 14 on the right valve core 12. Excess hydraulic oil enters the oil sump 16.

[0030] At the same time, the rodless chamber will return the hydraulic oil to the left valve core 12 through the main circuit 6 of the cylinder under the action of negative pressure, and enter the rod chamber through the connecting port 13 in the left valve core 12.

[0031] When it is necessary to adjust the resistance provided by the hydraulic cylinder, simply rotate the dial 5. The dial 5 drives the pinion 2 to rotate through the connecting shaft 10. The pinion 2 drives the valve core 12 to rotate through meshing with the large gear 3.

[0032] As the valve core 12 rotates, the size of the orifice 14 used to deliver the oil also changes, thereby adjusting the resistance that the resistance cylinder can provide. Furthermore, the dial 5 determines the flow rate at each moment throughout the process, improving the sensitivity of manual control and greatly enhancing operability.

[0033] It should be noted that the effective rotation angle of the valve core 12 in this scheme is 60 degrees, which satisfies the flow rate of the flow orifice 14 from zero to the maximum flow rate.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A controllable fine tuning resistance cylinder, characterized by, The utility model provides a kind of hydraulic cylinder, including oil cylinder body (1), the piston (15) is arranged in sealing sliding in the oil cylinder body (1), piston (15) one end fixedly arranged piston rod (7), piston (15) will the inside of oil cylinder body (1) be divided into rod cavity and rodless cavity;Two connecting shafts (10) are rotationally arranged on the oil cylinder body (1), the outer surface of two connecting shafts (10) is fixedly covered scale disc (5) and pinion (2);Two valve cores (12) are rotationally arranged in sealing in the oil cylinder body (1), two valve cores (12) are respectively communicated with rod cavity and rodless cavity by the communication port (13) being set in the oil cylinder body (1), and the flow hole (14) is set on each valve core (12);The top of two valve cores (12) is fixedly arranged big gear (3), and big gear (3) and pinion (2) one to one corresponding meshing transmission;In addition, oil cylinder main circuit (6) is set in the oil cylinder body (1), and oil pool (16) is fixedly installed, and valve core (12) is communicated with oil cylinder main circuit (6) by flow hole (14), and oil cylinder main circuit (6) is communicated with oil pool (16).

2. A controllable fine adjustment resistance cylinder according to claim 1, characterized in that, The oil cylinder body (1) is provided with a cover plate (4), and a plurality of countersunk screws (9) are slidingly arranged on the cover plate (4). The countersunk screws (9) are threadedly engaged with the oil cylinder body (1).

3. A controllable fine adjustment resistance cylinder according to claim 1, characterized in that, The oil cylinder body (1) is fixedly provided with an oil cylinder head (11) at one end. The piston rod (7) extends out of the oil cylinder body (1) at an end away from the piston (15) and is fixedly provided with a piston rod upper block (8).

4. A controllable fine adjustment resistance cylinder according to claim 1, characterized in that, The outer surface of the valve core (12) is provided with a sealing ring.

5. A controllable fine adjustment resistance cylinder according to claim 1, wherein, The oil pool (16) is provided with high-temperature silicone oil.

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