Multi-point supporting type hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a multi-point supporting type hydraulic oil cylinder which comprises an upper end cover, a lower end cover, a cylinder body, a piston and a piston rod, the upper end cover is fixedly connected with the top face of the cylinder body, the lower end cover is fixedly connected with the bottom face of the cylinder body, the piston is arranged in the cylinder body in a sliding mode, and the bottom end of the piston rod is fixedly connected with the piston. The hydraulic oil cylinder further comprises a supporting assembly, the supporting assembly comprises a clamping piece, a supporting rod and a connecting rod, the connecting rod is slidably connected with the upper end cover, the clamping piece is clamped on the piston rod, one end of the supporting rod is rotationally connected with the clamping piece, and the other end of the supporting rod is rotationally connected with the top end of the connecting rod. Therefore, when the piston rod extends out, a supporting point position is provided for the piston rod, the structural strength of the piston rod is enhanced, bearing stress is shared for the piston rod, the piston rod is prevented from being bent or bent, and the service life of the piston rod is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a multi-point support type hydraulic cylinder. Background Technology

[0002] The basic structure of a hydraulic cylinder includes a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cylinder barrel and cylinder head constitute the main structure of the hydraulic cylinder; the piston and piston rod jointly undertake the task of energy conversion. In existing hydraulic cylinders, the piston rod extends beyond the cylinder body during use, and as the tip of the piston rod moves away from the cylinder body, the stress concentrates on the piston rod. The middle section of the piston rod is prone to bending or even breakage due to stress, which shortens the service life of the hydraulic cylinder. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problem that in the prior art, when the piston rod extends out of the cylinder body during the use of the hydraulic cylinder, and as the top of the piston rod moves away from the cylinder body, the load-bearing stress is concentrated on the piston rod, and the middle section of the piston rod is very easy to bend or even break due to stress, which will shorten the service life of the hydraulic cylinder, a multi-point support type hydraulic cylinder is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a multi-point support hydraulic cylinder, which includes an upper end cover, a lower end cover, a cylinder body, a piston, and a piston rod. The upper end cover is fixedly connected to the top surface of the cylinder body, and the lower end cover is fixedly connected to the bottom surface of the cylinder body. The piston is slidably arranged in the cylinder body, and the bottom end of the piston rod is fixedly connected to the piston. The top end of the piston rod passes through the upper end cover and extends to the outside of the cylinder body. The cylinder body has an oil inlet and outlet port. The hydraulic cylinder also includes a support assembly, which includes a clamping member, a support rod, and a connecting rod. The connecting rod is slidably connected to the upper end cover. The clamping member clamps the piston rod. One end of the support rod is rotatably connected to the clamping member, and the other end is rotatably connected to the top end of the connecting rod. Through the design of the support assembly, it can follow the extension and retraction of the piston rod, thereby providing a support point for the piston rod when it extends, thus enhancing the structural strength of the piston rod, distributing the load-bearing stress of the piston rod, preventing the piston rod from bending or breaking, and ensuring the service life of the piston rod.

[0005] To address the safety concerns arising from exposed connecting rods, a support assembly is further included, comprising a sleeve, with the top end and upper end cap of the sleeve fixedly connected, the bottom end and lower end cap of the sleeve fixedly connected, the connecting rod and the sleeve slidably connected, and the bottom end of the connecting rod located inside the sleeve.

[0006] To address the issue of rigid collisions during the retraction of the connecting rod, which affects its service life, a support assembly is further included, comprising a buffer element arranged inside a sleeve. The buffer element is fixedly connected to the inner bottom surface of the sleeve, and the buffer element is used to support the connecting rod.

[0007] The device further includes a clamping component comprising two mating clamps connected at the same side ends of the two clamps by a threaded connection, with a piston rod located between the two clamps.

[0008] To address the problem of piston rod surface wear caused by excessive clamping of the piston rod, and the inability to follow the piston rod's movement when over-clamped, thus failing to provide support for the middle section of the piston rod, a further improvement is made by providing a receiving groove on the end face of the clamp near the piston rod. A locking roller and an elastic element are arranged in the receiving groove. A connecting groove is provided on the inner wall of the receiving groove. The roller end of the locking roller is arranged in the connecting groove, and the elastic element is arranged in the connecting groove. The elastic element is used to apply force to the locking roller, so that the locking roller contacts the piston rod.

[0009] It further includes a connecting groove that extends from top to bottom and outward.

[0010] The connecting groove further includes a connecting seat that matches the connecting groove. The connecting seat is slidably arranged in the connecting groove. One end of the elastic element abuts against the clamp and the other end abuts against the connecting seat. The connecting seat has a rotating groove for accommodating the end of the locking roller. The end of the locking roller is arranged in the rotating groove.

[0011] The beneficial effects of this utility model are as follows: The multi-point support type hydraulic cylinder provided by this utility model can follow the extension and retraction of the piston rod through the design of the support component, thereby providing a support point for the piston rod when it extends, thus enhancing the structural strength of the piston rod, distributing the load-bearing stress for the piston rod, preventing the piston rod from bending or breaking, and ensuring the service life of the piston rod. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0015] Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A;

[0016] Figure 4 This is a utility model Figure 3 A schematic diagram of the structure of the roller body with the locking roller not shown on one side of the clamp.

[0017] In the diagram: 1. Upper end cover, 2. Lower end cover, 3. Cylinder body, 4. Piston, 5. Piston rod, 6. Support assembly, 61. Clamping component, 611. Clamp, 6111. Receiving groove, 6112. Connecting groove, 62. Support rod, 63. Connecting rod, 64. Sleeve, 65. Buffer element, 66. Locking roller, 67. Elastic element, 68. Connecting seat, 681. Rotating groove. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] like Figure 1 This is a schematic diagram of the structure of this utility model, a multi-point support hydraulic cylinder. The hydraulic cylinder includes an upper end cover 1, a lower end cover 2, a cylinder body 3, a piston 4, and a piston rod 5. The upper end cover 1 is fixedly connected to the top surface of the cylinder body 3, and the lower end cover 2 is fixedly connected to the bottom surface of the cylinder body 3. The piston 4 is slidably arranged inside the cylinder body 3. The bottom end of the piston rod 5 is fixedly connected to the piston 4, and the top end of the piston rod 5 passes through the upper end cover 1 and extends to the outside of the cylinder body 3. The cylinder body 3 has an oil inlet and outlet port. The hydraulic cylinder also includes a support assembly 6, which includes clamping components. 61. Support rod 62 and connecting rod 63. Connecting rod 63 is slidably connected to upper end cover 1. Clamping member 61 is clamped on piston rod 5. One end of support rod 62 is rotatably connected to clamping member 61, and the other end is rotatably connected to the top of connecting rod 63. Through the design of support component 6, it can follow piston rod 5 to extend and retract, thereby providing a support point for piston rod 5 when it extends, thereby enhancing the structural strength of piston rod 5, sharing the load-bearing stress of piston rod 5, preventing piston rod 5 from bending or breaking, and ensuring the service life of piston rod 5.

[0020] like Figure 2 As shown, the support assembly 6 includes a sleeve 64, the top end of the sleeve 64 is fixedly connected to the upper end cap 1, the bottom end of the sleeve 64 is fixedly connected to the lower end cap 2, and the connecting rod 63 is slidably connected to the sleeve 64, with the bottom end of the connecting rod 63 located inside the sleeve 64. This provides a place for the connecting rod 63, increasing safety during use, and also provides support for one side of the bottom end of the connecting rod 63, stabilizing the connecting rod 63.

[0021] like Figure 2 As shown, the support assembly 6 includes a buffer element 65, which is arranged inside the sleeve 64. The buffer element 65 and the inner bottom surface of the sleeve 64 are fixedly connected. The buffer element 65 is used to support the connecting rod 63. The buffer element 65 is an elastic element such as a steel ring spring or a rubber spring, which provides buffering for the retraction of the connecting rod 63, avoids the rigid collision of the connecting rod 63 with the parts, and ensures the service life of the connecting rod 63.

[0022] like Figure 3 , 4 As shown, the clamping member 61 includes two matching clamps 611. The ends of the two clamps 611 on the same side are connected by a threaded connector. The piston rod 5 is located between the two clamps 611, and the clamps 611 clamp the piston rod 5.

[0023] A receiving groove 6111 is formed on the end face of the clamp 611 near the piston rod 5. A locking roller 66 and an elastic element 67 are arranged within the receiving groove 6111. A connecting groove 6112 is formed on the inner wall of the receiving groove 6111. The roller end of the locking roller 66 is arranged within the connecting groove 6112, and the elastic element 67 is also arranged within the connecting groove 6112. The elastic element 67 applies force to the locking roller 66, causing it to contact the piston rod 5. Through the design of the locking roller 66, when the piston rod 5 extends, it drives the locking rollers 66 on both sides to move upwards to clamp the piston rod 5, causing the clamp 611 to move with the piston rod 5, providing a support point for the piston rod 5. When the piston rod 5 retracts, it drives the locking rollers 66 on both sides to move downwards, reducing the clamping force on the piston rod 5, thereby reducing wear on the piston rod 5.

[0024] The connecting groove 6112 extends from top to bottom and outward. The end of the locking roller 66 can move along the extension direction of the connecting groove 6112 and can rotate freely within the connecting groove 6112. The connecting groove 6112 includes a connecting seat 68 that matches the connecting groove 6112. The connecting seat 68 is slidably arranged within the connecting groove 6112. One end of the elastic element 67 abuts against the clamp 611 and the other end abuts against the connecting seat 68. The connecting seat 68 has a rotating groove 681 for accommodating the end of the locking roller 66. The end of the locking roller 66 is arranged within the rotating groove 681. The design of the connecting seat 68 makes the installation of the locking roller 66 stable.

[0025] In use, when the piston rod 5 extends, it drives the locking rollers 66 on both sides to move upward to clamp the piston rod 5, so that the clamp 611 moves with the piston rod 5 to provide a support point for the piston rod 5. When the piston rod 5 retracts, it drives the locking rollers 66 on both sides to move downward to reduce the clamping force on the piston rod 5, thereby reducing the wear on the piston rod 5.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A multi-point support type hydraulic cylinder, comprising an upper end cover (1), a lower end cover (2), a cylinder body (3), a piston (4), and a piston rod (5), wherein the upper end cover (1) is fixedly connected to the top surface of the cylinder body (3), the lower end cover (2) is fixedly connected to the bottom surface of the cylinder body (3), the piston (4) is slidably arranged inside the cylinder body (3), the bottom end of the piston rod (5) is fixedly connected to the piston (4), the top end of the piston rod (5) passes through the upper end cover (1) and extends to the outside of the cylinder body (3), and the cylinder body (3) is provided with an oil inlet and outlet port, characterized in that, The hydraulic cylinder also includes a support assembly (6), which includes a clamping member (61), a support rod (62), and a connecting rod (63). The connecting rod (63) is slidably connected to the upper end cover (1). The clamping member (61) is clamped on the piston rod (5). One end of the support rod (62) is rotatably connected to the clamping member (61), and the other end is rotatably connected to the top of the connecting rod (63).

2. A multi-point support hydraulic cylinder as described in claim 1, characterized in that: The support assembly (6) includes a sleeve (64), the top end of the sleeve (64) and the upper end cap (1) are fixedly connected, the bottom end of the sleeve (64) and the lower end cap (2) are fixedly connected, the connecting rod (63) and the sleeve (64) are slidably connected, and the bottom end of the connecting rod (63) is located inside the sleeve (64).

3. A multi-point support hydraulic cylinder as described in claim 2, characterized in that: The support assembly (6) includes a buffer element (65) arranged inside the sleeve (64). The buffer element (65) and the inner bottom surface of the sleeve (64) are fixedly connected. The buffer element (65) is used to support the connecting rod (63).

4. A multi-point support hydraulic cylinder as described in claim 1, characterized in that: The clamping member (61) includes two matching clamps (611), and the ends of the two clamps (611) on the same side are connected by a threaded connector. The piston rod (5) is located between the two clamps (611).

5. A multi-point support hydraulic cylinder as described in claim 4, characterized in that: The clamp (611) has a receiving groove (6111) on the end face near the piston rod (5). A locking roller (66) and an elastic element (67) are arranged in the receiving groove (6111). A connecting groove (6112) is provided on the inner wall of the receiving groove (6111). The roller end of the locking roller (66) is arranged in the connecting groove (6112). The elastic element (67) is arranged in the connecting groove (6112). The elastic element (67) is used to apply force to the locking roller (66) so that the locking roller (66) contacts the piston rod (5).

6. A multi-point support hydraulic cylinder as described in claim 5, characterized in that: The connecting groove (6112) extends from top to bottom and outward.

7. A multi-point support hydraulic cylinder as described in claim 5, characterized in that: The connecting groove (6112) includes a connecting seat (68) that matches the connecting groove (6112). The connecting seat (68) is slidably arranged in the connecting groove (6112). One end of the elastic element (67) abuts against the clamp (611) and the other end abuts against the connecting seat (68). The connecting seat (68) has a rotating groove (681) for accommodating the end of the locking roller (66). The end of the locking roller (66) is arranged in the rotating groove (681).

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