A telescopic rotating hydraulic cylinder

Abstract

The present invention relates to the technical field of hydraulic cylinders, and specifically discloses a telescopic rotating hydraulic cylinder, comprising: a hydraulic pipe (10), and a hydraulic rod (20) sleeved and connected to the hydraulic pipe (10) and having a telescopic rotating function; the telescopic rotating hydraulic cylinder of the present invention changes the existing technology of driving by a piston, and only adopts a combination of a hydraulic rod and a hydraulic pipe, thereby greatly increasing the size of the hydraulic rod and improving the pressure bearing performance of the hydraulic rod. At the same time, the hydraulic rod can realize a rotating function while being telescopic; specifically, a thread groove is provided inside the hydraulic pipe, and cooperates with a pushing device arranged on the hydraulic rod. When hydraulic oil is injected, under the action of extrusion force, the hydraulic oil pushes the pushing device to perform a spiral motion in the thread groove, so that the hydraulic rod can complete the rotation while being telescopic.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, and in particular to a telescopic rotating hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion).

[0003] The interior of an existing hydraulic cylinder is generally composed of a piston and a hydraulic rod. This composition has the following problems: first, since hydraulic oil needs to be injected, the hydraulic rod is made relatively thin, which is prone to bending or cracking after long-term use and has poor pressure-bearing performance; second, the existing hydraulic cylinder can only achieve two states of extension and retraction, and cannot achieve a rotating state during the extension and retraction process. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a telescopic rotary hydraulic cylinder which has the advantages of being able to take into account pressure bearing performance and being able to rotate while telescoping.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A telescopic rotating hydraulic cylinder comprises: a hydraulic pipe, a hydraulic rod with a telescopic rotating function connected to the hydraulic pipe sleeve; the hydraulic pipe comprises a hydraulic oil inlet and outlet pipe, a pipe body for installing the inlet and outlet pipe, two blocking rings arranged inside the pipe body, a threaded groove arranged between the two blocking rings, and a sealing member arranged on the threaded groove and the blocking ring; the hydraulic rod comprises a main rod, two limiting rings installed on the main rod, and a pushing device arranged between the two limiting rings.

[0006] Preferably, it also includes a rear cover installed on the hydraulic pipe.

[0007] Preferably, the pushing device comprises a pushing member and grooves provided on both sides of the pushing member.

[0008] Preferably, it also includes a plurality of telescopic devices and a conversion member installed on the plurality of telescopic devices; the conversion member is movably connected to the hydraulic rod.

[0009] Preferably, two telescopic devices are provided.

[0010] Preferably, the telescopic device comprises a telescopic frame, a sliding hole provided on the telescopic frame, a slider installed on the sliding hole, and a telescopic rod installed on the slider; the telescopic device is connected to the conversion member via the telescopic rod.

[0011] Compared with the prior art, this application has the following beneficial effects: The telescopic and rotating hydraulic cylinder described in the present invention changes the existing technology of pushing by a piston, and only adopts a combination of a hydraulic rod and a hydraulic pipe, which greatly increases the size of the hydraulic rod and improves the pressure-bearing performance of the hydraulic rod. At the same time, the hydraulic rod can realize a rotation function while being telescopic and retractable. Specifically, a threaded groove is provided inside the hydraulic pipe, which cooperates with a pushing device on the hydraulic rod. When hydraulic oil is injected, under the action of the extrusion force, the hydraulic oil pushes the pushing device to perform a spiral motion in the threaded groove, thereby allowing the hydraulic rod to rotate while being telescopic and retractable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0013] Figure 1 This is a structural schematic diagram of a telescopic rotating hydraulic cylinder embodiment 1 of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure; Figure 3 for Figure 1 Schematic diagram of the cross-section structure after rotation and contraction; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the hydraulic pipe; Figure 5 for Figure 1 Schematic diagram of the structure of the hydraulic rod; Figure 6 for Figure 1 AA cross-sectional structural diagram; Figure 7 It is a schematic cross-sectional structure diagram of a second embodiment of a telescopic rotary hydraulic cylinder; Figure 8 It is a structural schematic diagram of a telescopic rotating hydraulic cylinder embodiment 3; Fig. 9 for Figure 8 Schematic diagram of the structure of the telescopic device. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various configurations. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0016] Unless otherwise defined, the technical terms or scientific terms used in the present invention document shall be the ordinary meaning understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantitative limit, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0017] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0018] Embodiment 1: A telescopic rotating hydraulic cylinder comprises: a hydraulic pipe 10, a hydraulic rod 20 with a telescopic rotating function and sleeved and connected to the hydraulic pipe 10, and a rear cover 50 installed on the hydraulic pipe 10; the hydraulic pipe 10 comprises a hydraulic oil inlet and outlet pipe 11, a pipe body 12 for installing the inlet and outlet pipe 11, two blocking rings 13 arranged inside the pipe body 12, a threaded groove 14 arranged between the two blocking rings 13, and a sealing member 15 arranged on the threaded groove 14 and the blocking ring 13; the hydraulic rod 20 comprises a main rod 21, two limiting rings 22 installed on the main rod 21, and a pushing device 23 arranged between the two limiting rings 22; the pushing device 23 comprises a pushing member 231 and grooves 232 provided on both sides of the pushing member 231.

[0019] like Figures 1 to 6 As shown, in order to improve the pressure bearing performance of the hydraulic rod 20, the combination of the traditional piston and the hydraulic rod 20 is cancelled inside the hydraulic cylinder, and the combination of the hydraulic rod 20 and the hydraulic pipe 10 is directly adopted, so that the outer diameter of the hydraulic rod 20 can be maximized to be close to the inner diameter of the hydraulic pipe 10 (such as Figure 2), thus the pressure bearing performance of the hydraulic rod 20 can be effectively improved.

[0020] Of course, while improving the pressure bearing performance of the hydraulic rod 20, it is also necessary to have the telescopic performance of the hydraulic cylinder. However, the traditional hydraulic cylinder can only achieve the telescopic function, and cannot have the rotation function while telescoping. Therefore, the present invention provides a thread groove 14 (such as Figure 4 ), and embed the pushing device 23 on the hydraulic rod 20 into the thread groove 14 (such as Figure 2 ).

[0021] like Figure 2 and Figure 3 As shown, when the hydraulic oil is continuously squeezed into the thread groove 14 from the inlet and outlet pipe 11 on the right, the pushing device 23 will be pushed to perform a spiral motion in the thread groove 14 due to the extrusion force. At this time, the pushing device 23 will drive the hydraulic rod 20 to perform a spiral contraction motion. At this time, the hydraulic oil in the thread groove 14 is continuously squeezed out along the inlet and outlet pipe 11 on the left.

[0022] When the hydraulic oil is continuously squeezed into the thread groove 14 from the inlet and outlet pipe 11 on the left, the pushing device 23 is pushed to perform a spiral motion in the thread groove 14 due to the extrusion force. At this time, the pushing device 23 drives the hydraulic rod 20 to perform a spiral extension motion. At this time, the hydraulic oil in the thread groove 14 is continuously squeezed out along the inlet and outlet pipe 11 on the right.

[0023] The hydraulic rod 20 can perform spiral telescopic motion in the hydraulic pipe 10 by cooperating with the two inlet and outlet pipes 11 on the right and left sides of the hydraulic pipe 10 to supply oil and discharge oil.

[0024] In order to prevent the hydraulic oil from overflowing and improve the hydraulic pushing performance, a sealing member 15 (such as Figure 4 ).

[0025] In order to improve the hydraulic pushing performance, the present embodiment further provides grooves 232 on both sides of the pushing member 231 to increase the contact area between the pushing member 231 and the hydraulic oil.

[0026] Embodiment 2: A telescopic rotating hydraulic cylinder comprises: a hydraulic pipe 10, and a hydraulic rod 20 with a telescopic rotating function which is sleeved and connected to the hydraulic pipe 10; the hydraulic pipe 10 comprises a hydraulic oil inlet and outlet pipe 11, a pipe body 12 for installing the inlet and outlet pipe 11, two blocking rings 13 arranged inside the pipe body 12, a threaded groove 14 arranged between the two blocking rings 13, and a sealing member 15 arranged on the threaded groove 14 and the blocking ring 13; the hydraulic rod 20 comprises a main rod 21, two limiting rings 22 installed on the main rod 21, and a pushing device 23 arranged between the two limiting rings 22; the pushing device 23 comprises a pushing member 231 and grooves 232 arranged on both sides of the pushing member 231.

[0027] like Figure 7 As shown, after the rear cover 50 is removed, hydraulic rods 20 can be provided at both ends of the hydraulic pipe 10, so that the hydraulic cylinder has a bidirectional telescopic and rotating function.

[0028] Embodiment three: A telescopic rotary hydraulic cylinder comprises: a hydraulic pipe 10, a hydraulic rod 20 with a telescopic rotation function sleeved and connected to the hydraulic pipe 10, and a rear cover 50 installed on the hydraulic pipe 10; the hydraulic pipe 10 comprises a hydraulic oil inlet and outlet pipe 11, a pipe body 12 for installing the inlet and outlet pipe 11, two blocking rings 13 arranged inside the pipe body 12, a threaded groove 14 arranged between the two blocking rings 13, and a sealing member 15 arranged on the threaded groove 14 and the blocking ring 13; the hydraulic rod 20 comprises a main rod 21, two limiting rings 22 installed on the main rod 21, and a sealing member 15 arranged on the two limiting rings 22 The pushing device 23 between the two ends; the pushing device 23 includes a pushing member 231 and grooves 232 provided on both sides of the pushing member 231; it also includes a plurality of telescopic devices 30 and conversion members 40 installed on the plurality of telescopic devices 30, and the conversion members 40 are movably connected with the hydraulic rod 20; the telescopic devices 30 are provided with two; the telescopic devices 30 include a telescopic frame 31, a sliding hole 32 provided on the telescopic frame 31, a slider 33 installed on the sliding hole 32, and a telescopic rod 34 installed on the slider 33; the telescopic device 30 is connected to the conversion member 40 via the telescopic rod 34.

[0029] like Figure 8 and Fig. 9 As shown, in order to restore the existing hydraulic cylinder to have only the telescopic function, a telescopic device 30 and a conversion member 40 installed on the telescopic device 30 are installed on the hydraulic pipe 10, and the conversion member 40 is converted into a conversion member 40 with only telescopic movement through the conversion member 40; specifically, the conversion member 40 is movably connected with the hydraulic rod 20, and when the hydraulic rod 20 rotates and telescopes, it drives the conversion member 40 to move together. In order to make the conversion member 40 have only the telescopic function, the conversion member 40 is telescopically limited by two telescopic devices 30. Specifically, the telescopic rod 34 is fixed to the conversion member 40, and the telescopic rod 34 is in the telescopic frame 31 and only performs telescopic movement, so that the conversion member 40 fixed to the telescopic rod 34 can also only realize telescopic movement. In this way, the hydraulic cylinder is used to restore the existing hydraulic cylinder to have only the telescopic function.

[0030] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A telescopic rotary hydraulic cylinder, characterized in that: include: A hydraulic pipe (10) and a hydraulic rod (20) sleeved and connected to the hydraulic pipe (10) and having telescopic and rotating functions; the hydraulic pipe (10) comprises an inlet and outlet pipe (11) for hydraulic oil, a pipe body (12) for mounting the inlet and outlet pipe (11), two blocking rings (13) arranged inside the pipe body (12), a thread groove (14) arranged between the two blocking rings (13), and a sealing member (15) arranged on the thread groove (14) and the blocking ring (13); the hydraulic rod (20) comprises a main rod (21), two limiting rings (22) mounted on the main rod (21), and a pushing device (23) arranged between the two limiting rings (22).

2. A telescopic rotary hydraulic cylinder according to claim 1, characterized in that: Also included is a rear cover (50) mounted on the hydraulic pipe (10).

3. A telescopic rotary hydraulic cylinder according to claim 2, characterized in that: The pushing device (23) comprises a pushing member (231) and grooves (232) formed on both sides of the pushing member (231).

4. A telescopic rotary hydraulic cylinder according to claim 3, characterized in that: It also includes a plurality of telescopic devices (30) and a conversion member (40) mounted on the plurality of telescopic devices (30); the conversion member (40) is movably connected to the hydraulic rod (20).

5. A telescopic rotary hydraulic cylinder according to claim 4, characterized in that: The telescopic devices (30) are provided with two.

6. A telescopic rotary hydraulic cylinder according to claim 5, characterized in that: The telescopic device (30) comprises a telescopic frame (31), a sliding hole (32) provided on the telescopic frame (31), a sliding block (33) mounted on the sliding hole (32), and a telescopic rod (34) mounted on the sliding block (33); the telescopic device (30) is connected to the conversion member (40) via the telescopic rod (34).

Images