Self-cleaning cylinder assembly

Abstract

The utility model discloses a self-cleaning air cylinder assembly which comprises a rod side end cover and a rodless side end cover, the rod side end cover and the rodless side end cover are installed at the two ends of a cylinder barrel and fixedly connected through a pull rod, a piston rod is arranged in the cylinder barrel and the rod side end cover in a penetrating mode, a blowing assembly is arranged at the extending end of the piston rod in a sleeved mode, and the rod side end cover is fixedly connected with the rod side end cover. The purging assembly is fixedly mounted at the end part of the pull rod; the purging assembly comprises a purging inner end cover and a purging outer end cover which are of a square structure, adjusting nuts are arranged on the opposite outer sides of the purging inner end cover and the purging outer end cover correspondingly, and the adjusting nuts are in threaded connection with the pull rod; an annular cavity is formed in the end face, close to the purging inner end cover, of the purging outer end cover, four air inlet channels communicated with the annular cavity are formed in the periphery of the annular cavity, and annular spraying holes are formed in the annular cavity. The self-cleaning cylinder assembly provided by the utility model can solve the problems that a dustproof ring is easy to damage after being used for a long time, a dustproof cover is not suitable for quick action, and full-elongation work of a long cylinder cannot be met.

Description

Technical Field

[0001] The utility model relates to a self-cleaning cylinder assembly, belonging to the technical field of pneumatic actuators. Background Art

[0002] The cylinder is a pneumatic actuator that converts the pressure energy of compressed gas into mechanical energy in pneumatic transmission. Application areas of the cylinder: printing (tension control), semiconductor (spot welding machine, chip grinding), automatic control, robot, etc. In automatic control, the piston rod of the cylinder is exposed to the air. The dust particles in the air adhere to the piston rod and easily enter the cylinder, causing damage to the internal structure of the cylinder. Especially in packaging equipment such as powder automatic packaging machines and ton packaging machines, it is particularly important to prevent dust from the cylinder piston rod.

[0003] There are two main dust prevention measures for cylinder piston rods in current technology. One is that the cylinder body comes with a dustproof ring, and the other is that the cylinder piston rod is equipped with a dust cover.

[0004] The cylinder body comes with a dust ring. When the cylinder piston rod passes through the inner hole of the dust ring, the dust on the cylinder piston rod is wiped by the dust ring made of elastic material. After long-term use, the dust carried by the cylinder piston rod continues to squeeze the dust ring, causing some dust materials to enter the cylinder body and cause cylinder failure.

[0005] The cylinder piston rod is installed with a dust cover, which is a spring structure made of airtight flexible material. The dust ring can effectively isolate the dust in the environment from contacting the cylinder piston rod. However, when the dust cover is used for a fast-acting cylinder, it cannot be folded normally. When it is used for a cylinder with a particularly long extension range, the length of the dust cover will still be very long after contraction, which cannot meet the full extension range of the cylinder.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] The utility model aims at the deficiencies in the background technology and provides a self-cleaning cylinder assembly, which can solve the problems that the dust ring is easily damaged after long-term use, the dust cover is not suitable for fast movement and cannot meet the full extension of the long cylinder.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] A self-cleaning cylinder assembly comprises a rod side end cover and a rodless side end cover, the rod side end cover and the rodless side end cover are mounted at both ends of a cylinder barrel, the rod side end cover and the rodless side end cover are fixedly connected by a tie rod, the tie rod is distributed on the periphery of the cylinder barrel, a piston rod is penetrated inside the cylinder barrel and the rod side end cover, a purge assembly is sleeved on the protruding end of the piston rod, and the purge assembly is fixedly mounted on the end of the tie rod;

[0010] The purge assembly comprises a square-structured purge inner end cover and a purge outer end cover, and the outer sides of the purge inner end cover and the purge outer end cover facing each other are respectively provided with adjustment nuts, and the adjustment nuts are threadedly connected with the pull rod;

[0011] An annular cavity is arranged in the end surface of the purge outer end cover close to the purge inner end cover, and four air inlet channels connected to the annular cavity are arranged on the periphery of the annular cavity, and the four air inlet channels are distributed on the top, bottom, left and right of the annular cavity; an annular spray hole is arranged inside the annular cavity.

[0012] Furthermore, the annular spray hole sprays toward the piston rod at an oblique angle.

[0013] Furthermore, a dust ring is embedded in the end of the rod side end cover close to the purge assembly, and the dust ring is slidably connected to the outer wall of the piston rod.

[0014] Furthermore, the purge inner end cover is arranged close to the rod side end cover, and the purge outer end cover is arranged away from the rod side end cover.

[0015] Furthermore, the purge inner end cover and the purge outer end cover are both sleeved on the extended ends of the piston rod and the pull rod.

[0016] Furthermore, four mounting grooves are respectively provided on the facing outer sides of the purge inner end cover and the purge outer end cover, and the four mounting grooves are arranged at the four corners of the purge inner end cover and the purge outer end cover. The mounting grooves are used for installing the adjusting nuts, and the adjusting nuts and the mounting grooves are arranged in a one-to-one correspondence.

[0017] Furthermore, an air intake joint is installed in the end of the air intake passage away from the annular cavity.

[0018] Furthermore, a sealing gasket is installed between the purge inner end cover and the purge outer end cover, and the sealing gasket is installed on the periphery of the annular cavity.

[0019] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0020] When the piston rod contracts, air is automatically supplied to the purge assembly, and the purge assembly generates an annular high-speed airflow to clean the surface of the piston rod located at the center of the purge assembly, and remove the powder particles attached to the surface of the piston rod. The cleaned piston rod is then cleaned by the dust ring, which greatly reduces the possibility of powder particles entering the cylinder, can extend the service life of the cylinder, and reduce the maintenance frequency;

[0021] The utility model can be applied in environments such as powder packaging where powder particles may adhere to the piston rod surface, and is particularly suitable for cleaning the piston rod surface of a cylinder with a long extension and full extension. It solves the problem in the prior art that the dust ring is easily damaged after long-term use, the dust cover is not suitable for fast action, and does not meet the full extension of the long cylinder.

[0022] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 yes Figure 1 A magnified view of the structure at M in the middle;

[0025] Figure 3 yes Figure 1 Structural cross-section view at AA in the middle.

[0026] In the figure, 1-rod side end cover, 2-rodless side end cover, 3-cylinder, 4-pull rod, 5-piston rod, 6-dust ring, 7-purge assembly, 71-purge inner end cover, 72-purge outer end cover, 73-adjusting nut, 74-sealing gasket, 75-annular cavity, 76-annular spray hole, 77-intake channel, 78-intake joint. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0028] like Figure 1-Figure 3 As shown together, the utility model provides a self-cleaning cylinder assembly, including a rod side end cover 1 and a rodless side end cover 2, the rod side end cover 1 and the rodless side end cover 2 are installed at both ends of a cylinder barrel 3, the rod side end cover 1 and the rodless side end cover 2 are fixedly connected by a tie rod 4, the tie rod 4 is distributed on the periphery of the cylinder barrel 3, and a piston rod 5 is passed through the interior of the cylinder barrel 3 and the rod side end cover 1.

[0029] The extended end of the piston rod 5 is sleeved with a purge assembly 7 , and the purge assembly 7 is fixedly mounted on the end of the pull rod 4 .

[0030] The purge assembly 7 includes a square-structured purge inner end cover 71 and a purge outer end cover 72. The purge inner end cover 71 is arranged close to the rod side end cover 1, and the purge outer end cover 72 is arranged away from the rod side end cover 1. The purge inner end cover 71 and the purge outer end cover 72 are both sleeved on the protruding ends of the piston rod 5 and the pull rod 4.

[0031] Adjusting nuts 73 are respectively provided on the facing outer sides of the purge inner end cover 71 and the purge outer end cover 72. The adjusting nuts 73 are threadedly connected to the pull rod 4. The purge inner end cover 71 and the purge outer end cover 72 are fixed by the adjusting nuts 73, and the positions of the purge inner end cover 71 and the purge outer end cover 72 can be flexibly adjusted.

[0032] Four mounting grooves are respectively provided on the facing outer sides of the purge inner end cover 71 and the purge outer end cover 72. The four mounting grooves are arranged at the four corners of the purge inner end cover 71 and the purge outer end cover 72. The mounting grooves are used for the installation of the adjustment nuts 73. The adjustment nuts 73 are arranged one-to-one with the mounting grooves.

[0033] An annular cavity 75 is provided in the end surface of the purge outer end cover 72 close to the purge inner end cover 71 , and a plurality of air inlet passages 77 communicating with the annular cavity 75 are provided on the periphery of the annular cavity 75 .

[0034] There are four air inlet passages 77 , which are distributed on the top, bottom, left and right sides of the annular cavity 75 .

[0035] An air intake connector 78 is installed in the end of the air intake channel 77 away from the annular cavity 75. When the piston rod 5 retracts, the compressed air enters the air intake channel 77 and the annular cavity 75 in sequence from the air intake connector 78.

[0036] An annular spray hole 76 is provided inside the annular chamber 75 , and the annular spray hole 76 sprays toward the piston rod 5 at an oblique angle.

[0037] A sealing gasket 74 is installed between the purge inner end cover 71 and the purge outer end cover 72 . The sealing gasket 74 is installed on the periphery of the annular cavity 75 to seal the periphery of the annular cavity 75 .

[0038] A dust ring 6 is embedded in the end of the rod side end cover 1 close to the purge assembly 7 , and the dust ring 6 is slidably connected to the outer wall of the piston rod 5 .

[0039] The specific working principle of this utility model:

[0040] The utility model provides compressed air to the purge assembly 7 through the cylinder retraction action interlock signal. When the piston rod 5 contracts, the purge assembly 7 is automatically started to supply air, and the surface of the piston rod 5 located at the center of the purge assembly 7 is cleaned by the 360° annular high-speed airflow generated by the purge assembly 7, and the powder particles attached to the surface of the piston rod 5 are cleaned. The cleaned piston rod 5 is then cleaned by the dust ring 6, which greatly reduces the possibility of powder particles entering the cylinder, can extend the service life of the cylinder, and reduce the maintenance frequency.

[0041] The utility model is mainly used in environments such as powder packaging where powder particles may adhere to the piston rod surface, and is particularly suitable for cleaning the surface of a cylinder piston rod with a long extension and full extension action.

[0042] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A self-cleaning cylinder assembly, comprising a rod side end cover (1) and a rodless side end cover (2), the rod side end cover (1) and the rodless side end cover (2) being mounted at both ends of a cylinder barrel (3), the rod side end cover (1) and the rodless side end cover (2) being fixedly connected by a tie rod (4), the tie rod (4) being distributed on the periphery of the cylinder barrel (3), a piston rod (5) being inserted into the cylinder barrel (3) and the rod side end cover (1), characterized in that: A purge assembly (7) is sleeved on the extended end of the piston rod (5), and the purge assembly (7) is fixedly mounted on the end of the pull rod (4); The purge assembly (7) comprises a square-structured purge inner end cover (71) and a purge outer end cover (72), and the purge inner end cover (71) and the purge outer end cover (72) are respectively provided with adjustment nuts (73) on the outer sides facing each other, and the adjustment nuts (73) are threadedly connected to the pull rod (4); An annular cavity (75) is provided in the end surface of the purge outer end cover (72) close to the purge inner end cover (71); four air inlet passages (77) communicating with the annular cavity (75) are provided on the periphery of the annular cavity (75); the four air inlet passages (77) are distributed on the top, bottom, left and right sides of the annular cavity (75); and an annular spray hole (76) is provided inside the annular cavity (75).

2. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: The annular spray hole (76) sprays at an oblique angle toward the piston rod (5).

3. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: A dust ring (6) is embedded in the end of the rod side end cover (1) close to the purge assembly (7), and the dust ring (6) is slidably connected to the outer wall of the piston rod (5).

4. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: The purge inner end cover (71) is arranged close to the rod side end cover (1), and the purge outer end cover (72) is arranged away from the rod side end cover (1).

5. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: The purge inner end cover (71) and the purge outer end cover (72) are both sleeved on the extended ends of the piston rod (5) and the pull rod (4).

6. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: Four mounting grooves are respectively provided on the facing outer sides of the purge inner end cover (71) and the purge outer end cover (72). The four mounting grooves are arranged at four corners of the purge inner end cover (71) and the purge outer end cover (72). The mounting grooves are used for installing adjustment nuts (73). The adjustment nuts (73) and the mounting grooves are arranged in a one-to-one correspondence.

7. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: An air intake connector (78) is installed in the end of the air intake passage (77) away from the annular chamber (75).

8. A self-cleaning cylinder assembly as claimed in claim 1, characterized in that: A sealing gasket (74) is installed between the purge inner end cover (71) and the purge outer end cover (72), and the sealing gasket (74) is installed on the periphery of the annular cavity (75).

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