Rotary oil cylinder with rear-mounted pull rod

Abstract

The utility model belongs to the technical field of rotary oil cylinders, and particularly relates to a rotary oil cylinder with a rear-mounted pull rod, which comprises a pull rod body, a piston, an end cover and an oil cylinder body, one side of the oil cylinder body is connected with one side of the end cover, the inner wall of the oil cylinder body is rotatably connected with the piston, and the outer surface of the pull rod body is contacted with the inner wall of the piston. Meanwhile, the pull rod body penetrates through the oil cylinder body and the end cover, the outer surface of the pull rod body is connected with a positioning ring, the positioning ring is in contact with one end of the piston, the pull rod body is sleeved with a locking nut, the locking nut is in threaded connection with one end of the piston, the inner wall of the locking nut is in contact with the positioning ring, and one side of the locking nut is connected with a first fluted disc; a second fluted disc is slidably connected to the inner wall of the piston, a positioning block is connected to the outer surface of the second fluted disc, the second fluted disc makes contact with the first fluted disc, and a spring is arranged in the piston. The fixing efficiency of the locking nut is improved, and the pull rod body can be conveniently installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary oil cylinders, in particular to a pull rod rear-mounted rotary oil cylinder. Background Art

[0002] A rear-mounted tie-rod rotary cylinder is a specially designed hydraulic actuator that combines the cylinder's rotary motion with the linear motion of its rod. This design is typically used in applications where rotary motion needs to be transmitted to a remote location or where operation requires confined spaces. The rear-mounted tie-rod design means the rod is positioned behind the cylinder axis, which helps reduce the cylinder's overall size and facilitates installation and maintenance.

[0003] In the existing rear-mounted pull rod rotary cylinder, after the pull rod is inserted into the piston, the pull rod needs to be fixed with a locking nut. In order to prevent the pull rod from loosening, another locking nut is installed behind the locking nut, and a locking bolt is inserted into the locking nut at the rear to tighten the locking nut at the front. The locking bolt restricts the loosening of the two locking nuts, thereby better restricting the loosening of the pull rod. Although this method can prevent the locking nut from loosening, it is cumbersome to operate and inconvenient to install. Summary of the Invention

[0004] The purpose of the utility model is to provide a pull rod rear-mounted rotary oil cylinder, which improves the fixing efficiency of the locking nut and facilitates the installation of the pull rod body.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rear-mounted pull rod rotary cylinder, comprising a pull rod body, a piston, an end cover and a cylinder body, characterized in that: one side of the cylinder body is connected to one side of the end cover, the inner wall of the cylinder body is rotatably connected to the piston, the outer surface of the pull rod body is in contact with the inner wall of the piston, and the pull rod body passes through the cylinder body and the end cover, the outer surface of the pull rod body is connected to a positioning ring, the positioning ring is in contact with one end of the piston, the outside of the pull rod body is sleeved with a locking nut, the locking nut is threadedly connected to one end of the piston, the inner wall of the locking nut is in contact with the positioning ring, one side of the locking nut is connected to a gear disc 1, the inner wall of the piston is slidably connected to a gear disc 2, the outer surface of the gear disc 2 is connected to a positioning block, the gear disc 2 is in contact with the gear disc 1, and a spring is provided inside the piston.

[0006] In order to provide balanced elastic support for the second gear disc, as a preferred rear-pull rod rotary cylinder of the utility model, there are multiple springs, multiple circular arrays of the springs, one end of the multiple springs are connected to the inner bottom wall of the piston, and the other ends of the multiple springs are connected to the side of the second gear disc located inside the piston.

[0007] In order to prevent the second gear disc from rotating, as a preferred pull rod rear-mounted rotary oil cylinder of the present invention, a slide groove is opened on the inner side of the piston, and the outer surface of the positioning block is slidably connected to the inner wall of the slide groove.

[0008] In order to enhance the stability of the spring, as a preferred rear-pull rod rotary cylinder of the present invention, the inner wall of the piston body is connected to a plurality of first locating pins, and the side of the gear disk 2 located inside the piston body is connected to a plurality of second locating pins, the number of the plurality of first locating pins and the second locating pins is the same as the number of the plurality of springs, and the first locating pins and the second locating pins are both located inside the springs.

[0009] In order to fix the object to be clamped, as a preferred pull rod rear-mounted rotary oil cylinder of the present invention, the other end of the pull rod body is threadedly connected to a chuck, and an expansion joint is opened on the inner side of the chuck.

[0010] In order to facilitate the entry and output of hydraulic oil, as a preferred rear-pull rod rotary cylinder of the utility model, the interior of the cylinder body is connected to an oil nozzle, and there are two oil nozzles, one is an oil inlet nozzle and the other is an oil return nozzle.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The utility model provides components such as toothed disc 1, toothed disc 2 and positioning block. The locking nut rotates to drive toothed disc 1 to move. The toothed disc 1 and toothed disc 2 are in staggered contact with each other, and the rotation of the toothed disc 1 is restricted by the toothed disc 2. At the same time, the toothed disc 1 restricts the rotation of the locking nut, so that the toothed disc 1 and toothed disc 2 cannot be loosened when they are not separated. When the locking nut needs to be loosened, it is only necessary to push the positioning block to drive the toothed disc 2 to move toward the inside of the piston, so that the toothed disc 2 is out of contact with the toothed disc 1, and the locking nut can be loosened, thereby improving the fixing efficiency of the locking nut and facilitating the installation of the pull rod body.

[0013] 2. The utility model provides a first locating pin, a second locating pin, a spring and other components. When the piston rotates, in order to prevent the spring from being unstable inside the piston, the first locating pin and the second locating pin support both ends of the spring, so that the spring remains in place when the piston rotates, and the spring always maintains support for the second gear disc, thereby enhancing the stability of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of the piston of the utility model;

[0017] Figure 3 This is a front view structural diagram of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the second toothed disc of the present invention;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the pull rod body of the utility model;

[0020] In the figure: 1. Tie rod body; 2. Piston; 3. End cover; 4. Cylinder body; 5. Locating ring; 6. Locking nut; 7. Sprocket 1; 8. Sprocket 2; 9. Spring; 10. Slide; 11. Locating block; 12. First locating pin; 13. Second locating pin; 14. Collet; 15. Expansion joint; 16. Oil nozzle. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0024] See also Figures 1 to 5, a rear-mounted pull rod rotary cylinder, comprising a pull rod body 1, a piston 2, an end cover 3 and a cylinder body 4, characterized in that: one side of the cylinder body 4 is connected to one side of the end cover 3, the inner wall of the cylinder body 4 is rotatably connected to the piston 2, the outer surface of the pull rod body 1 is in contact with the inner wall of the piston 2, and the pull rod body 1 passes through the cylinder body 4 and the end cover 3, the outer surface of the pull rod body 1 is connected with a positioning ring 5, the positioning ring 5 is in contact with one end of the piston 2, the outside of the pull rod body 1 is sleeved with a locking nut 6, the locking nut 6 is threadedly connected to one end of the piston 2, the inner wall of the locking nut 6 is in contact with the positioning ring 5, one side of the locking nut 6 is connected with a gear disc 1 7, the inner wall of the piston 2 is slidably connected with a gear disc 2 8, the outer surface of the gear disc 2 8 is connected with a positioning block 11, the gear disc 2 8 is in contact with the gear disc 1 7, and a spring 9 is provided inside the piston 2.

[0025] In this embodiment: the piston 2 drives the pull rod body 1 to extend and retract, and when the locking nut 6 is locked, the other end contacts the positioning ring 5 to limit the movement of the pull rod body 1. After the locking nut 6 is locked, the sprocket 1 7 contacts the sprocket 2 8, and the movement of the locking nut 6 is limited by the mutual staggered contact between the sprocket 1 7 and the sprocket 2 8. The sprocket 2 8 maintains contact with the sprocket 1 7 through the elastic push of the spring 9, and the movement of the sprocket 2 8 is controlled by the positioning block 11.

[0026] As a technical optimization solution of the present invention, there are multiple springs 9, and multiple springs 9 are arranged in a circular array. One end of the multiple springs 9 is connected to the inner bottom wall of the piston 2, and the other end of the multiple springs 9 is connected to one side of the gear disk 2 8 located inside the piston 2.

[0027] In this embodiment, the second gear disc 8 is elastically supported by a plurality of springs 9 , so that the second gear disc 8 can maintain stability.

[0028] As a technical optimization solution of the present invention, a sliding groove 10 is opened on the inner side of the piston 2 , and the outer surface of the positioning block 11 is slidably connected to the inner wall of the sliding groove 10 .

[0029] In this embodiment, the positioning block 11 has space to move by the sliding groove 10. When it is necessary to release the restriction on the locking nut 6, the positioning block 11 is pushed to move it. When the positioning block 11 moves, the gear disc 2 8 is also driven to move at the same time, so that the gear disc 2 8 is disengaged from the gear disc 1 7. The gear disc 2 8 releases the restriction on the gear disc 1 7, and the locking nut 6 can be rotated.

[0030] As a technical optimization solution of the present invention, the inner wall of the piston 2 body is connected to a plurality of first positioning pins 12, and the side of the gear disk 2 8 located inside the piston 2 body is connected to a plurality of second positioning pins 13. The number of the plurality of first positioning pins 12 and the second positioning pins 13 is the same as the number of the plurality of springs 9, and the first positioning pins 12 and the second positioning pins 13 are both located inside the spring 9.

[0031] In this embodiment, when the piston 2 rotates, in order to prevent the spring 9 from being unstable inside the piston 2, the first positioning pin 12 and the second positioning pin 13 support both ends of the spring 9, thereby enhancing the stability of the spring 9.

[0032] As a technical optimization solution of the present invention, the other end of the pull rod body 1 is threadedly connected to a clamp 14 , and an expansion joint 15 is opened on the inner side of the clamp 14 .

[0033] In this embodiment, after the pull rod body 1 drives the clamp 14 to move, the clamp 14 is blocked by the external clamp seat, so that the clamp 14 shrinks, and the expansion joint 15 provides a shrinking space.

[0034] As a technical optimization solution of the present invention, the interior of the oil cylinder body 4 is connected with an oil nozzle 16 , and there are two oil nozzles 16 , one is an oil inlet nozzle 16 , and the other is an oil return nozzle 16 .

[0035] In this embodiment, one of the two oil nozzles 16 is connected to the oil inlet pipe, and the other is connected to the oil return pipe. The hydraulic oil pump transmits power to the piston 2 through the two oil pipes, and the piston 2 drives the pull rod body 1 to extend and retract.

[0036] Working principle: First, insert the pull rod body 1 into the interior of the piston 2 until the positioning ring 5 contacts one end of the piston 2, and then put the locking nut 6 on the outside of the pull rod body 1, and then rotate the locking nut 6. While the locking nut 6 rotates, it drives the gear disc 1 7 to rotate. Under the continuous rotation of the locking nut 6, it drives the gear disc 1 7 to contact with the gear disc 2 8. After the gear disc 1 7 contacts with the gear disc 2 8, the gear disc 1 7 pushes the gear disc 2 8 to move toward the inside of the piston 2. While the gear disc 2 8 moves, the spring 9 is compressed, and then the locking nut 6 squeezes and fixes the pull rod body 1 to stop the locking nut 6 from rotating. At the same time, the spring 9 pushes the gear disc 2 8 to make close contact with the gear disc 1 7, and then rotate the chuck 14 to connect it to the other end of the pull rod body 1, and then connect the oil pipe through the oil nozzle 16, and connect it to the hydraulic oil pump through the oil pipe. The hydraulic oil pump provides power for the piston 2.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rear-mounted pull rod rotary cylinder, comprising a pull rod body (1), a piston (2), an end cover (3) and a cylinder body (4), characterized in that: One side of the oil cylinder body (4) is connected to one side of the end cover (3), the inner wall of the oil cylinder body (4) is rotatably connected to the piston (2), the outer surface of the pull rod body (1) is in contact with the inner wall of the piston (2), and the pull rod body (1) passes through the oil cylinder body (4) and the end cover (3), the outer surface of the pull rod body (1) is connected to a positioning ring (5), the positioning ring (5) is in contact with one end of the piston (2), and the outer sleeve of the pull rod body (1) is provided with a lock. A locking nut (6) is threadedly connected to one end of the piston (2), the inner wall of the locking nut (6) is in contact with the positioning ring (5), one side of the locking nut (6) is connected to a toothed disc 1 (7), the inner wall of the piston (2) is slidably connected to a toothed disc 2 (8), the outer surface of the toothed disc 2 (8) is connected to a positioning block (11), the toothed disc 2 (8) is in contact with the toothed disc 1 (7), and a spring (9) is provided inside the piston (2).

2. The rear-tie rod rotary cylinder according to claim 1, characterized in that: There are multiple springs (9) in a circular array, one end of each of the multiple springs (9) is connected to the inner bottom wall of the piston (2), and the other end of each of the multiple springs (9) is connected to one side of the gear disc 2 (8) located inside the piston (2).

3. The rear-tie rod rotary cylinder according to claim 1, characterized in that: A sliding groove (10) is provided on the inner side of the piston (2), and the outer surface of the positioning block (11) is slidably connected to the inner wall of the sliding groove (10).

4. The rear-tie rod rotary cylinder according to claim 1, characterized in that: The inner wall of the piston (2) body is connected to a plurality of first positioning pins (12), and the side of the second gear disc (8) located inside the piston (2) body is connected to a plurality of second positioning pins (13). The number of the plurality of first positioning pins (12) and second positioning pins (13) is the same as the number of the plurality of springs (9), and the first positioning pins (12) and the second positioning pins (13) are both located inside the springs (9).

5. The rear-tie rod rotary cylinder according to claim 1, characterized in that: The other end of the pull rod body (1) is threadedly connected to a clamp (14), and an expansion joint (15) is provided on the inner side of the clamp (14).

6. The rear-tie rod rotary cylinder according to claim 1, characterized in that: The interior of the oil cylinder body (4) is connected to an oil nozzle (16), and there are two oil nozzles (16), one being an oil inlet nozzle (16) and the other being an oil return nozzle (16).

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