A new rotary telescopic cylinder

Abstract

This utility model relates to a novel rotary telescopic cylinder, comprising a main cylinder body, a piston movably disposed inside the main cylinder body for vertical movement, and a cylinder cover sealed and fixed at the bottom opening of the main cylinder body; a telescopic rod concentrically distributed and rotatable is also inserted in the piston; a first step shaft and a second step shaft concentrically arranged and vertically distributed are formed in the middle of the telescopic rod; two spiral grooves are centrally symmetrically distributed on the outer circumference of the first step shaft; a vertical slot hole parallel to the central axis is formed in the second step shaft; a horizontally distributed fan-shaped groove is formed at the lower end of the openings on both sides of the vertical slot hole, and the bottoms of the two fan-shaped grooves are connected to each other; this utility model can separate the rotational and linear telescopic movements of the telescopic rod, making it suitable for industrial applications that require the actuator to perform rotational and linear telescopic movements sequentially, thereby expanding its applicability.

Description

Technical Field

[0001] This utility model relates to a novel rotary telescopic cylinder. Background Technology

[0002] A rotary telescopic cylinder is a composite pneumatic component that combines rotary motion and telescopic function. It is mainly used in scenarios that require rotary and linear motion. Its core structure usually includes two parts: a rotary drive device and a telescopic push rod. It uses compressed air to drive the rotary motion at a specific angle and the linear telescopic motion of the piston rod.

[0003] In existing rotary telescopic cylinders, the piston rod performs both rotational and linear telescopic movements simultaneously, meaning they cannot be executed separately or sequentially. However, in certain industrial applications, the actuator is not allowed to perform both rotational and linear telescopic movements simultaneously; instead, they must perform them sequentially. Therefore, existing rotary telescopic cylinders cannot be applied to these situations, thus limiting their applicability and requiring further improvement. Utility Model Content

[0004] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a new type of rotary telescopic cylinder that can separate rotary and linear telescopic motion to expand its application range.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a novel rotary telescopic cylinder, comprising a main cylinder body, a piston movably disposed inside the main cylinder body to have the function of vertical movement, and a cylinder cover sealed and fixed at the bottom opening of the main cylinder body; a first air inlet and a second air inlet, both communicating with the interior of the main cylinder body and located on the upper and lower sides of the piston respectively, are provided on one outer wall of the main cylinder body; characterized in that:

[0006] The piston is located inside the main cylinder and cannot be rotated relative to it. Concentrically distributed telescopic rods that can rotate relative to each other are also inserted in the piston. The upper end of the telescopic rod is sealed and moves through the top of the main cylinder and extends above the main cylinder.

[0007] The telescopic rod has a first stepped shaft and a second stepped shaft that are concentrically arranged and distributed vertically in the middle. Correspondingly, a first recessed cavity is opened at the center of the lower end of the piston, and a second recessed cavity is opened at the center of the bottom surface of the first recessed cavity. A shaft hole is opened between the center of the bottom surface of the second recessed cavity and the center of the upper end of the piston. The telescopic rod is movably inserted into the shaft hole, and the first stepped shaft is movably disposed in the second recessed cavity.

[0008] Two spiral grooves are provided on the outer circumferential surface of the first stepped shaft. Correspondingly, two first positioning screws are also inserted and fixed on the outer circumferential surface of the piston, which are arranged laterally and diagonally distributed. The threaded ends of the two first positioning screws are respectively movably inserted into the two spiral grooves.

[0009] The second step shaft has a vertical slot that passes through the central axis in parallel. The lower ends of the openings on both sides of the vertical slot have a horizontally distributed fan-shaped slot in the same direction, and the bottoms of the two fan-shaped slots are connected to each other.

[0010] A horizontally distributed pin is also interspersed in the vertical slot or between two of the fan-shaped slots, and both ends of the pin are fixed to the cylinder head.

[0011] Preferably, it also includes a multiplier piston that is movably disposed inside the cylinder head to have a vertical movement function, and the lower end of the telescopic rod moves and seals through the top of the cylinder head and is concentrically fixed on the multiplier piston.

[0012] Preferably, an air intake recess is provided on one side of the outer wall of the main cylinder, located between the first air intake and the second air intake. A first vent is provided between the bottom of the main cylinder and the inner wall of the air intake recess, and a second vent is provided between the bottom of the main cylinder and the inner wall of the second air intake.

[0013] Preferably, a third air intake hole and a fourth air intake hole are provided on one outer wall of the cylinder head, which are connected to the inside of the cylinder head and located on the upper and lower sides of the multiplier piston, respectively. A third vent hole and a fourth vent hole are also provided between the top outer wall of the cylinder head and the inner walls of the third air intake hole and the fourth air intake hole, respectively. The opening of the third vent hole is connected to the opening of the first vent hole, and the opening of the fourth vent hole is connected to the opening of the second vent hole.

[0014] Preferably, the upper center of the piston has a guide sleeve concentrically sleeved on the outside of the telescopic rod. Two vertically spaced slots are opened on the outer circumferential surface of the guide sleeve. Correspondingly, two horizontally arranged and diagonally distributed second positioning screws are also inserted and fixed on the outer wall of the main cylinder. The threaded ends of the two second positioning screws are respectively movably inserted into the two vertically spaced slots.

[0015] Preferably, a positioning protrusion is formed on the top outer wall of the cylinder head, extending into the main cylinder body and concentrically fitted around the telescopic rod. Two pin holes are provided on the outer circumferential surface of the positioning protrusion, and the two ends of the pin are respectively inserted into the two pin holes.

[0016] Preferably, a force-multiplying cavity is provided at the center of the bottom outer wall of the cylinder head, the force-multiplying piston is movably disposed in the force-multiplying cavity, and a detachable bottom cover is fixed at the opening of the force-multiplying cavity.

[0017] Compared with the prior art, the advantages of this utility model are: this utility model can separate the rotation and linear telescopic movements of the telescopic rod, thereby realizing the separate and sequential execution of the rotation and linear telescopic movements, which is applicable to industrial application scenarios that require the executed element to perform rotation and linear telescopic movements in sequence, thus expanding the scope of application. Attached Figure Description

[0018] Figure 1 This is an exploded top view of the present invention;

[0019] Figure 2 This is an exploded view of the present invention from the top and side. Detailed Implementation

[0020] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0022] like Figures 1-2 As shown, a novel rotary telescopic cylinder includes a main cylinder body 1, a piston 2 movably disposed inside the main cylinder body 1 to have the function of moving up and down, and a cylinder cover 4 sealed and fixed at the bottom opening of the main cylinder body 1. A first air inlet 101 and a second air inlet 102, which are connected to the interior of the main cylinder body 1 and are respectively located on the upper and lower sides of the piston 2, are opened on one side of the outer wall of the main cylinder body 1. When pressurized gas is introduced into the main cylinder body 1 through the first air inlet 101, it will force the piston 2 to move downward; similarly, if pressurized gas is introduced into the main cylinder body 1 through the second air inlet 102, it will force the piston 2 to move upward. The above structure and principle are all prior art.

[0023] The feature of this utility model is that the piston 2 is located inside the main cylinder 1 and cannot be rotated relative to it. The piston 2 is also provided with concentrically distributed telescopic rods 3 that can rotate relative to it. The upper end of the telescopic rod 3 is sealed and moves through the top of the main cylinder 1 and extends to the top of the main cylinder 1.

[0024] The telescopic rod 3 has a first stepped shaft 31 and a second stepped shaft 32 that are concentrically arranged and distributed vertically. Correspondingly, a first recessed cavity 22 is opened at the center of the lower end of the piston 2, and a second recessed cavity 23 is opened at the center of the bottom surface of the first recessed cavity 22. A shaft hole 24 is opened between the center of the bottom surface of the second recessed cavity 23 and the center of the upper end of the piston 2. The telescopic rod 3 is movably inserted into the shaft hole 24, and the first stepped shaft 31 is movably disposed in the second recessed cavity 23.

[0025] Two spiral grooves 33 are provided on the outer circumferential surface of the first step shaft 31. Correspondingly, two first positioning screws 5 are also inserted and fixed on the outer circumferential surface of the piston 2, which are arranged laterally and diagonally distributed. The threaded ends of the two first positioning screws 5 are respectively movably inserted into the two spiral grooves 33.

[0026] The second step shaft 32 has a vertical slot 34 that passes through the central axis in parallel. The lower ends of the openings on both sides of the vertical slot 34 are provided with a horizontally distributed fan-shaped slot 35 facing the same direction. The bottoms of the two fan-shaped slots 35 are connected to each other.

[0027] A horizontally distributed pin 6 is also interspersed in the vertical slot 34 or between two fan-shaped slots 35, and both ends of the pin 6 are fixed to the cylinder head 4.

[0028] A novel rotary telescopic cylinder further includes a multiplier piston 8 movably disposed inside the cylinder head 4 to have a vertical movement function, and the lower end of the telescopic rod 3 movably and sealed through the top of the cylinder head 4 and concentrically fixed on the multiplier piston 8.

[0029] An intake countersunk hole 103 is provided on one side of the outer wall of the main cylinder 1, located between the first intake hole 101 and the second intake hole 102. A first vent hole 105 is provided between the bottom of the main cylinder 1 and the inner wall of the intake countersunk hole 103. A second vent hole 106 is provided between the bottom of the main cylinder 1 and the inner wall of the second intake hole 102.

[0030] A third air intake hole 42 and a fourth air intake hole 43 are provided on one outer wall of the cylinder head 4, which are connected to the inside of the cylinder head 4 and are located on the upper and lower sides of the multiplier piston 8 respectively. A third vent hole 47 and a fourth vent hole 48 are also provided between the top outer wall of the cylinder head 4 and the inner wall of the third air intake hole 42 and the fourth air intake hole 43 respectively. The opening of the third vent hole 47 is connected to the opening of the first vent hole 105, and the opening of the fourth vent hole 48 is connected to the opening of the second vent hole 106.

[0031] The upper center of the piston 2 has a guide sleeve 25 concentrically sleeved on the outside of the telescopic rod 3. Two vertical opening slots 21 are opened on the outer circumferential surface of the guide sleeve 25. Correspondingly, two second positioning screws 7 are also inserted and fixed on the outer wall of the main cylinder 1. The threaded ends of the two second positioning screws 7 are respectively movably inserted into the two vertical opening slots 21 to ensure that the piston 2 can only move vertically up and down inside the main cylinder 1 and will not rotate.

[0032] A force-multiplying cavity 41 is provided at the center of the bottom outer wall of the cylinder head 4. The force-multiplying piston 8 is movably disposed in the force-multiplying cavity 41. A detachable bottom cover 9 is also fixed at the opening of the force-multiplying cavity 41.

[0033] A through hole 44 is provided between the bottom center of the power-multiplying cavity 41 and the top outer wall of the cylinder head 4. The lower end of the telescopic rod 3 moves and seals through the through hole 44 and extends into the power-multiplying cavity 41. The third air intake hole 42 and the fourth air intake hole 43 are both provided between the outer wall of the cylinder head 4 and the inner wall of the power-multiplying cavity 41.

[0034] A positioning protrusion 45 is formed on the top outer wall of the cylinder head 4, extending into the main cylinder body 1 and concentrically fitted on the outside of the telescopic rod 3. Two pin holes 46 are provided on the outer circumferential surface of the positioning protrusion 45, which are diagonally arranged. The two ends of the pin shaft 6 are respectively inserted into the two pin holes 46.

[0035] The working principles of rotational and linear motion:

[0036] When pressurized gas enters the main cylinder 1 through the first air inlet 101, it forces the piston 2 to move downward. Since the threaded ends of the two second positioning screws 7 are respectively inserted into the two vertical opening slots 21, the piston 2 moves vertically downward and does not rotate during this process.

[0037] Since the threaded ends of the two first positioning screws 5 are respectively inserted into the two spiral grooves 33 on the telescopic rod 3; and before the piston 2 moves downward, the pin 6 is laterally inserted between the ends of the two sector grooves 35 away from the vertical slot 34, so the telescopic rod 3 is restricted by the two sector grooves 35 by the pin 6 and cannot move up and down. Therefore, when the piston 2 moves downward, the threaded ends of the two first positioning screws 5 will slide in the two spiral grooves 33 respectively, thereby forcing the telescopic rod 3 to rotate 90 degrees in the direction of the vertical slot 34, thus completing the rotational movement first; and after the telescopic rod 3 rotates 90 degrees, the pin 6 rotates to the bottom of the vertical slot 34.

[0038] Subsequently, as piston 2 continues to move downward, piston 2 will press down on the first step shaft 31 with the bottom surface of the second recess 23, thereby forcing the telescopic rod 3 to move downward. Since the pin 6 enters the interior of the vertical slot 34 during the movement of the telescopic rod 3, the telescopic rod 3 will not rotate and can only move downward, thus completing the linear motion of the telescopic rod 3, thereby separating the rotation of the cylinder from the linear motion.

[0039] The working principle of force multiplier:

[0040] Pressurized gas enters the main cylinder 1 through the first air inlet 101 to force the piston 2 to move downward. When the piston 2 is below the fifth air inlet 103, pressurized gas is introduced into the fifth air inlet 103, and then enters the force-multiplying chamber 41 through the first vent 105 and the third air inlet 42, thereby pressing the force-multiplying piston 8 downward, and thus causing the telescopic rod 3 to be subjected to twice the force, thereby achieving the force-multiplying contraction effect of the telescopic rod 3.

[0041] Similarly, if pressurized gas is introduced into the second air inlet 102, part of the pressurized gas enters the main cylinder 1 to force the piston 2 to move upward, and the other part of the pressurized gas enters the force-multiplying chamber 41 through the second vent 106 and the fourth vent 48, thereby pushing the force-multiplying piston 8 upward, so that the telescopic rod 3 is subjected to twice the force, thus realizing the force-multiplying extension effect of the telescopic rod 3.

[0042] This invention can separate the rotational and linear telescopic movements of the telescopic rod 3, thereby enabling the rotational and linear telescopic movements to be executed separately and sequentially. This makes it suitable for industrial applications where the executed element must perform rotational and linear telescopic movements sequentially, thus expanding its applicability.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel rotary telescopic cylinder, comprising a main cylinder body, a piston movably disposed inside the main cylinder body to perform vertical movement, and a cylinder cover sealed and fixed at the bottom opening of the main cylinder body; a first air inlet and a second air inlet, both communicating with the interior of the main cylinder body and located on the upper and lower sides of the piston respectively, are provided on one outer wall of the main cylinder body, characterized in that: The piston is located inside the main cylinder and cannot be rotated relative to it. Concentrically distributed telescopic rods that can rotate relative to each other are also inserted in the piston. The upper end of the telescopic rod is sealed and moves through the top of the main cylinder and extends above the main cylinder. The telescopic rod has a first stepped shaft and a second stepped shaft that are concentrically arranged and distributed vertically in the middle. Correspondingly, a first recessed cavity is opened at the center of the lower end of the piston, and a second recessed cavity is opened at the center of the bottom surface of the first recessed cavity. A shaft hole is opened between the center of the bottom surface of the second recessed cavity and the center of the upper end of the piston. The telescopic rod is movably inserted into the shaft hole, and the first stepped shaft is movably disposed in the second recessed cavity. Two spiral grooves are provided on the outer circumferential surface of the first stepped shaft. Correspondingly, two first positioning screws are also inserted and fixed on the outer circumferential surface of the piston, which are arranged laterally and diagonally distributed. The threaded ends of the two first positioning screws are respectively movably inserted into the two spiral grooves. The second step shaft has a vertical slot that passes through the central axis in parallel. The lower ends of the openings on both sides of the vertical slot have a horizontally distributed fan-shaped slot in the same direction, and the bottoms of the two fan-shaped slots are connected to each other. A horizontally distributed pin is also interspersed in the vertical slot or between two of the fan-shaped slots, and both ends of the pin are fixed to the cylinder head.

2. The novel rotary telescopic cylinder according to claim 1, characterized in that, It also includes a multiplier piston that is movably located inside the cylinder head to have the function of vertical movement. The lower end of the telescopic rod moves and seals through the top of the cylinder head and is concentrically fixed on the multiplier piston.

3. A novel rotary telescopic cylinder according to claim 1, characterized in that, An air intake recess is provided on one side of the outer wall of the main cylinder, located between the first air intake and the second air intake. A first vent is provided between the bottom of the main cylinder and the inner wall of the air intake recess, and a second vent is provided between the bottom of the main cylinder and the inner wall of the second air intake.

4. A novel rotary telescopic cylinder according to claim 2, characterized in that, The cylinder head has a third air intake hole and a fourth air intake hole on one side of its outer wall. The third air intake hole and the fourth air intake hole are respectively located on the upper and lower sides of the piston and are connected to the inside of the cylinder head. The top outer wall of the cylinder head is also provided with a third vent hole and a fourth vent hole. The opening of the third vent hole is connected to the opening of the first vent hole, and the opening of the fourth vent hole is connected to the opening of the second vent hole.

5. A novel rotary telescopic cylinder according to claim 1, characterized in that, The piston has a guide sleeve concentrically sleeved on the outside of the telescopic rod at the center of its upper end. Two vertically spaced slots are opened on the outer circumferential surface of the guide sleeve. Correspondingly, two horizontally arranged and diagonally spaced second positioning screws are also inserted and fixed on the outer wall of the main cylinder. The threaded ends of the two second positioning screws are respectively movably inserted into the two vertically spaced slots.

6. A novel rotary telescopic cylinder according to claim 1, characterized in that, The top outer wall of the cylinder head has a positioning protrusion that extends into the main cylinder and is concentrically fitted around the telescopic rod. The outer circumferential surface of the positioning protrusion has two pin holes that are diagonally arranged, and the two ends of the pin are respectively inserted into the two pin holes.

7. A novel rotary telescopic cylinder according to claim 2, characterized in that, The cylinder head has a force-multiplying cavity at the center of its bottom outer wall, and the force-multiplying piston is movably disposed in the force-multiplying cavity. A detachable bottom cover is also fixed at the opening of the force-multiplying cavity.

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