Shaft sleeve connection type small telescopic air cylinder

Abstract

The utility model discloses a shaft sleeve connection type small telescopic air cylinder, and relates to the technical field of small telescopic air cylinders. The shaft sleeve connection type small telescopic air cylinder comprises a shell, a piston is slidably arranged on one side of an inner cavity of the shell, a movable rod is fixedly arranged on one side of the piston, and a threaded hole is formed in the movable rod; the shaft sleeve mechanism comprises a first guide ring slidably arranged outside one end of the movable rod, a fixed ring is fixedly arranged on one side of the first guide ring, a first sealing groove is fixedly formed in one side of the fixed ring, a second guide ring is fixedly arranged in the first sealing groove, and a second sealing ring is clamped between the second guide ring and the first guide ring. Four symmetrically-arranged mounting holes are formed in the four corners of the shell in a penetrating mode. According to the invention, the problems of incapability of being suitable for a high-precision mechanical system and higher stability and reliability are solved.

Description

Technical Field

[0001] This application relates to the field of small telescopic cylinder technology, and more particularly to a small telescopic cylinder with a bushing connection type. Background Art

[0002] At present, small telescopic cylinders have the advantages of compact structure, long stroke, strong load capacity, good stability, etc., and are therefore widely used in various mechanical equipment and systems.

[0003] Existing small telescopic cylinders often fail to meet the expected accuracy requirements in mechanical systems that require high-precision control due to unstable connections and inaccurate transmissions. Moreover, existing small telescopic cylinders cannot provide higher stability and reliability during actual use. Summary of the Utility Model

[0004] In order to improve the suitability for use in high-precision mechanical systems, as well as the problems of higher stability and reliability, this application provides a small telescopic cylinder with a bushing connection type.

[0005] The small telescopic cylinder with a bushing connection type provided by this application adopts the following technical solutions:

[0006] The small telescopic cylinder with a bushing connection type includes a housing. A piston is slidably arranged on one side of the inner cavity of the housing. One side of the piston is fixedly provided with a movable rod. A threaded hole is arranged inside the movable rod. One end of the movable rod is provided with a bushing mechanism.

[0007] The bushing mechanism includes a first guide ring slidably arranged outside one end of the movable rod. One side of the first guide ring is fixedly provided with a fixed ring. One side of the fixed ring is fixedly provided with a first sealing groove. A second guide ring is fixedly arranged inside the first sealing groove. A second sealing ring is clamped between the second guide ring and the first guide ring.

[0008] Four symmetrically arranged mounting holes are penetrated through the four corners of the housing.

[0009] By adopting the above technical solutions, the piston drives the movable rod to reciprocate back and forth. The threaded hole inside the movable rod can be connected to other devices such as a probe. The first guide ring and the second guide ring can provide support and guidance for the movable rod.

[0010] Preferably, the bushing mechanism further includes a first sealing ring sleeved outside the first sealing groove for sealing.

[0011] By adopting the above technical solutions, the cooperation between the first sealing groove and the first sealing ring can prevent gas leakage in the inner cavity of the outer shell.

[0012] Preferably, a retractable snap ring for limiting is fixedly arranged on one side outside the fixed ring.

[0013] By adopting the above technical solution, the telescopic snap ring can help the entire bushing mechanism achieve quick disassembly.

[0014] Preferably, two symmetrically arranged first air inlet and outlet holes are provided in the upper part of the inner cavity of the housing. Second air inlet and outlet holes are provided above both of the two first air inlet and outlet holes, and air inlet and outlet nozzles are threadedly connected above both of the two second air inlet and outlet holes.

[0015] By adopting the above technical solution, the cooperation of the first air inlet and outlet holes, the second air inlet and outlet holes, and the air inlet and outlet nozzles can transport gas into the inner cavity of the housing and extract the gas in the inner cavity of the housing.

[0016] Preferably, a limiting ring that abuts against one side of the fixed ring is fixedly provided on one side of the inner cavity of the housing.

[0017] By adopting the above technical solution, the limiting ring can limit the entire bushing mechanism.

[0018] Preferably, a shock pad that abuts against the surface of one side of the inner cavity of the housing and is used for buffering is fixedly provided on one side of the piston.

[0019] By adopting the above technical solution, the shock pad can alleviate the problem of piston damage caused by the collision between the piston and the inner wall of the outer shell.

[0020] Preferably, a third sealing ring with good sealing effect is sleeved in the middle of the piston.

[0021] By adopting the above technical solution, the third sealing ring separates the front end and the rear end of the piston, forming two sealed spaces with good sealing effects.

[0022] Preferably, a pressing block is provided inside one side of the housing, and one side of the pressing block is arranged to abut against the telescopic snap ring.

[0023] By adopting the above technical solution, the pressing block abuts against the telescopic snap ring, which can achieve the extrusion of the telescopic snap ring, thereby releasing the entire bushing mechanism.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The sliding connection between the first guide ring and the second guide ring and the movable rod can provide a certain supporting performance for the movable rod and play a guiding role for the movable rod, enabling the movable rod to move in a straight line, ensuring the accuracy, and improving the stability when the piston drives the movable rod to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall schematic diagram of the present application;

[0027] Figure 2Cross-sectional schematic diagram of the present application;

[0028] Figure 3 Exploded view of the internal components of the present application;

[0029] Figure 4 Enlarged view of the position of the retractable snap ring of the present application;

[0030] Figure 5 Cross-sectional view of the bushing mechanism of the present application.

[0031] Reference numerals: 1, housing; 2, piston; 3, movable rod;

[0032] 4, bushing mechanism; 41, first guide ring; 42, fixed ring; 43, second guide ring; 44, retractable snap ring; 45, first sealing groove; 46, first sealing ring;

[0033] 5, threaded hole; 6, first air inlet / outlet hole; 7, second air inlet / outlet hole; 8, air inlet / outlet nozzle; 9, limit ring; 10, mounting hole; 11, shock pad; 12, third sealing ring; 13, pressing block; 14, second sealing ring. Detailed implementation manners

[0034] The following further describes the present application in detail with reference to the Figures 1-5 accompanying drawings.

[0035] The embodiment of the present application discloses a small retractable cylinder with bushing connection.

[0036] Embodiment 1

[0037] Referring to Figure 1 、 2 , the small retractable cylinder with bushing connection includes a housing 1 for protecting internal components, and a cylinder is provided in the middle of the housing 1. Two first air inlet / outlet holes 6 are provided in the upper part of the cylinder in the inner cavity of the housing 1, and the two first air inlet / outlet holes 6 are symmetrically arranged. One is located in the middle of the housing 1, and the other is located at the tail of the housing 1. Two second air inlet / outlet holes 7 are provided in the upper part of the two first air inlet / outlet holes 6, and the two second air inlet / outlet holes 7 communicate with the inner cavities of the two first air inlet / outlet holes 6. One of the first air inlet / outlet holes 6 is located in the middle of the second air inlet / outlet hole 7, and the other first air inlet / outlet hole 6 is located on the side of the second air inlet / outlet hole 7. Air inlet / outlet nozzles 8 are provided in the upper part of the two second air inlet / outlet holes 7, and the two air inlet / outlet nozzles 8 are threadedly connected to the two second air inlet / outlet holes 7.

[0038] A limiting ring 9 is fixedly arranged on one side of the middle part of the cylinder in the inner cavity of the housing 1, and one side surface of the limiting ring 9 abuts against one side surface of the fixed ring 42. Four mounting holes 10 with high precision are provided at the four corners on one side of the housing 1, and these four mounting holes 10 are not only symmetrically arranged but also fixedly penetrate through the four corners of the housing 1. A piston 2 is slidably arranged on one side of the inner cavity of the housing 1, and a shock pad 11 is fixedly arranged on the side surface of the piston 2 away from the limiting ring 9. The side surface of the shock pad 11 away from the piston 2 abuts against one side surface of the cylinder wall in the inner cavity of the housing 1.

[0039] (Note that generally, there is a certain distance between the piston 2 and the cylinder wall in the inner cavity of the housing 1. Only when the piston 2 moves, the shock pad 11 will abut against the cylinder wall in the inner cavity of the housing 1 to buffer the piston 2).

[0040] A third sealing ring 12 is sleeved in the middle of the piston 2, and the sealing effect of the third sealing ring 12 is good, and no gas leakage will occur when the piston 2 moves. The middle part of the side surface of the piston 2 away from the shock pad 11 is fixedly connected to one side surface of the movable rod 3, and a threaded hole 5 is provided in the middle of the inner cavity of the movable rod 3.

[0041] Both of the two first air inlet and outlet holes 6 arranged in the upper part of the cylinder in the inner cavity of the housing 1 can convey gas into the cylinder in the inner cavity of the housing 1 and can also discharge the gas in the cylinder in the inner cavity of the housing 1. The inner cavities of the two first air inlet and outlet holes 6 are communicated with the inner cavity of the second air inlet and outlet hole 7 arranged above them. Therefore, the second air inlet and outlet hole 7 can also convey gas into the first air inlet and outlet holes 6, and then convey the gas into the cylinder in the inner cavity of the housing 1 through the first air inlet and outlet holes 6 or convey the gas in the cylinder in the inner cavity of the housing 1 through the first air inlet and outlet holes 6 to the second air inlet and outlet hole 7 for discharge. The inner cavity of the second air inlet and outlet hole 7 is communicated with the inner cavity of the air inlet and outlet nozzle 8. The air inlet and outlet nozzle 8 threadedly connected to the upper part of the second air inlet and outlet hole 7 can be connected to other external devices, responsible for conveying gas into the second air inlet and outlet hole 7, then conveying it to the first air inlet and outlet holes 6 through the second air inlet and outlet hole 7, and finally conveying it into the cylinder in the inner cavity of the housing 1 through the first air inlet and outlet holes 6, so as to push the piston 2 to move.

[0042] The gas in the cylinder of the inner cavity of the same housing 1 can also be transported from the first air inlet and outlet hole 6 to the second air inlet and outlet hole 7, and then from the second air inlet and outlet hole 7 to the air inlet and outlet nozzle 8, and the gas is transported to other devices through the air inlet and outlet nozzle 8, so that the piston 2 moves without resistance. Therefore, among the two first air inlet and outlet holes 6, the second air inlet and outlet hole 7, and the air inlet and outlet nozzle 8, one is responsible for transporting the gas into the cylinder of the inner cavity of the housing 1, and the other is responsible for discharging the gas in the cylinder of the inner cavity of the housing 1. Since the third sealing ring 12 is arranged in the middle of the piston 2, it can achieve a good sealing effect. At the same time, since the piston 2 is located between the two first air inlet and outlet holes 6, the second air inlet and outlet hole 7, and the air inlet and outlet nozzle 8, the third sealing ring 12 divides the first air inlet and outlet hole 6, the second air inlet and outlet hole 7, and the air inlet and outlet nozzle 8 in front of the piston 2 into a sealed space, and the first air inlet and outlet hole 6, the second air inlet and outlet hole 7, and the air inlet and outlet nozzle 8 behind the piston 2 are divided into another sealed space.

[0043] Moreover, the two first air inlet and outlet holes 6, the second air inlet and outlet hole 7, and the air inlet and outlet nozzle 8 can simultaneously achieve one for transporting gas into the inner cavity of the housing 1 to push the piston 2 forward, and the other for discharging the gas in front of the piston 2 in the cylinder, so that the piston 2 can move forward and has a certain pulling force to assist the movement of the piston 2. If you want the piston 2 to move backward, just reverse the process. Moreover, in order to prevent the piston 2 from colliding with the inner cylinder wall of the housing 1 and causing damage when moving backward, a shock pad 11 is arranged behind the piston 2 for shock absorption.

[0044] The installation holes 10 penetrating through the four corners of the housing 1 have high precision, can be accurately docked with other devices, and have a certain fixing effect on the small telescopic cylinder. The threaded holes 5 arranged in the inner cavity of the movable rod 3 are reserved for connecting with external devices such as probes.

[0045] Refer to Figure 2 、 3 Figures 4 and 5. A bushing mechanism 4 is arranged at one end of the movable rod 3 away from the piston 2. The bushing mechanism 4 includes a first guide ring 41 slidably arranged on the outer surface of the end of the movable rod 3 away from the piston 2. One side outer surface of the first guide ring 41 is fixedly connected to one side inner surface of the fixed ring 42. One side surface of the fixed ring 42 away from the first guide ring 41 is fixedly connected to one side surface of the first sealing groove 45. The inner cavity surface of the first sealing groove 45 away from the first guide ring 41 is fixedly connected to the outer surface of the second guide ring 43. A certain distance is left between the first guide ring 41 and the second guide ring 43. Both the first guide ring 41 and the second guide ring 43 are slidably connected to the movable rod 3. The inner diameters of the first guide ring 41 and the second guide ring 43 are the same. A second sealing ring 14 is clamped between the second guide ring 43 and the first guide ring 41. The second sealing ring 14 is also slidably connected to the movable rod 3 and can achieve a good sealing effect.

[0046] A first sealing ring 46 is sleeved outside the first sealing groove 45, and the first sealing ring 46 has a good sealing effect like the second sealing ring 14. One side surface of the outer side of the fixing ring 42 is fixedly connected to the inner surface of the retractable snap ring 44 for limiting, and one side surface of the retractable snap ring 44 away from the limiting ring 9 abuts against one side surface of the pressing block 13 (as Figure 4 shown), and the pressing block 13 is arranged inside the housing 1 on the side of the fixing ring 42.

[0047] A certain distance is left between the upper surface of the fixing ring 42 away from the first guiding ring 41 and the side surface of the limiting ring 9 away from the piston 2 to allow the pressing block 13 to press and push the retractable snap ring 44 to move. A spring is arranged inside the retractable snap ring 44 to help the retractable snap ring 44 reset when the retractable snap ring 44 is not under downward pressure.

[0048] The first guiding ring 41 and the second guiding ring 43 are slidably connected to the movable rod 3 to provide certain supporting performance for the movable rod 3 and play a guiding role for the movable rod 3, so that the movable rod 3 can move in a straight line, and at the same time, the accuracy is guaranteed. The second sealing ring 14 provides good sealing performance when the movable rod 3 moves, so that there is no air leakage in the closed space at the front end of the piston 2 when the movable rod 3 moves. Similarly, the first sealing ring 46 is sleeved on the first sealing groove 45 and plays the same role as the second sealing ring 14. The first sealing ring 46 and the second sealing ring 14 can prevent the gas in the closed space at the front end of the piston 2 from leaking from the upper part of the first sealing groove 45 and the outside of the movable rod 3.

[0049] The retractable snap ring 44 on the upper part of the fixing ring 42 can help the entire bushing mechanism 4 to be quickly disassembled. A spring is arranged inside the retractable snap ring 44. When the upper part of the retractable snap ring 44 is squeezed, the triangular snap block on the upper part of the retractable snap ring 44 moves downward and squeezes the spring. When the retractable snap ring 44 is no longer squeezed, the squeezed spring will push the triangular snap block on the upper part of the retractable snap ring 44 upward, so that the retractable snap ring 44 can be stuck to the inside of the housing 1. When wanting to take out the entire bushing mechanism 4, only need to press the pressing block 13 arranged in the inner cavity of the housing 1, so that the pressing block 13 pushes the retractable snap ring 44 and squeezes the retractable snap ring 44 downward, and then the entire bushing mechanism 4 can be taken out.

[0050] The implementation principle of the bushing-connected small telescopic cylinder in the embodiment of the present application is as follows: First, the staff connects the equipment such as the probe that needs to be connected to the threaded hole 5 arranged inside the movable rod 3, then aligns the mounting hole 10 with other equipment and inserts it, and connects the air pipe in the air pump to the air inlet and outlet nozzle 8.

[0051] When everything is ready, the gas is respectively sent through the air inlet and outlet nozzles 8, the first air inlet and outlet holes 6, and the second air inlet and outlet holes 7 located at the front and rear ends of the piston 2 by an air pump to the sealed space at the rear end of the piston 2 to push the piston 2, and at the same time, the gas in the sealed space at the front end of the piston 2 is extracted, so that the piston 2 can move forward without resistance. On the contrary, the piston 2 can be pushed backward. When the piston 2 is pushed backward, the shock pad 11 abuts against the inner cylinder wall of the housing 1 to offset the damage caused by the collision between the piston 2 and the inner cylinder wall of the housing 1.

[0052] The reciprocating movement of the piston 2 can drive the movable rod 3 and the probe or other devices connected in the threaded hole 5 in the inner cavity of the movable rod 3 to reciprocate. And when the movable rod 3 moves, the first guide ring 41 and the second guide ring 43 provide guidance and support for the movement of the movable rod 3.

[0053] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Small telescopic cylinder with sleeve connection, characterized by: It comprises a shell (1), a piston (2) is slidably arranged on one side of the inner cavity of the shell (1), a movable rod (3) is fixedly arranged on one side of the piston (2), a threaded hole (5) is arranged inside the movable rod (3), and a shaft sleeve mechanism (4) is arranged at one end of the movable rod (3); The shaft sleeve mechanism (4) comprises a first guide ring (41) slidably arranged outside one end of the movable rod (3); a fixing ring (42) is fixedly arranged on one side of the first guide ring (41); a first sealing groove (45) is fixedly arranged on one side of the fixing ring (42); a second guide ring (43) is fixedly arranged inside the first sealing groove (45); and a second sealing ring (14) is clamped between the second guide ring (43) and the first guide ring (41); Four symmetrically arranged mounting holes (10) are formed through the four corners of the housing (1).

2. The sleeve-connected small telescopic cylinder according to claim 1, characterized in that: The shaft sleeve mechanism (4) also includes a first sealing ring (46) sleeved outside the first sealing groove (45) for sealing.

3. The sleeve-connected small telescopic cylinder according to claim 1, characterized in that: A retractable clamping ring (44) for limiting position is fixedly provided on one side of the exterior of the fixing ring (42).

4. The small-sized telescopic cylinder with sleeve connection according to claim 1 is characterized in that: The upper part of the inner cavity of the shell (1) is provided with two symmetrically arranged first inlet and outlet holes (6), the upper part of the two first inlet and outlet holes (6) is provided with a second inlet and outlet hole (7), and the upper part of the two second inlet and outlet holes (7) is threadedly connected with an inlet and outlet nozzle (8).

5. The shaft sleeve connection type small telescopic cylinder according to claim 1, characterized in that: A limiting ring (9) is fixedly provided on one side of the inner cavity of the shell (1) and abuts against one side of the fixing ring (42).

6. The small-sized telescopic cylinder with sleeve connection according to claim 1, characterized in that: A shock-absorbing pad (11) is fixedly provided on one side of the piston (2) and is in contact with a surface of one side of the inner cavity of the shell (1) and is used for buffering.

7. The small-sized telescopic cylinder with sleeve connection according to claim 1 is characterized in that: The middle part of the piston (2) is sleeved with a third sealing ring (12) with good sealing effect.

8. The small-sized telescopic cylinder with sleeve connection according to claim 1 is characterized in that: A pressing block (13) is provided inside one side of the shell (1), and one side of the pressing block (13) is arranged in contact with a retractable clamping ring (44).

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