Piston structure for rubber sleeve

Abstract

The utility model discloses a piston structure for a rubber sleeve, which relates to the technical field of pistons, and is characterized by comprising a piston body, a piston head and a piston core, an air hole is formed in the piston core; a glue scraping part abutting against the inner wall of the glue cylinder is formed on the piston head, and a first mounting groove and a second mounting groove are formed in the peripheral surface of the piston head; a supporting ring is mounted in the first mounting groove; a sealing ring is mounted in the second mounting groove; the air inlet end of the one-way valve is located at the bottom of the air hole, and the air outlet end of the one-way valve is located at the top of the air hole; and the plugging piece is detachably arranged at the top of the air hole and is used for sealing the top end of the air hole. The utility model can prevent excessive glue from contacting with the sealing ring, stably support the piston, prevent the piston from inclining or turning on one side in the use process, prevent the sealing ring from being extruded by the glue, further prevent the sealing ring from falling off, and ensure the stability of the sealing ring in the piston propelling process.

Description

Technical Field

[0001] The utility model relates to the technical field of pistons, and more specifically to a piston structure for a rubber cylinder. Background Art

[0002] Most glues, plastics and other colloid materials are packaged in rubber tubes. When in use, a piston is used to squeeze the colloid from the rubber tube to the outlet. The traditional piston is usually a piston body that matches the inner wall structure of the rubber tube. It is directly inserted into the rubber tube for use. The sealing fit is poor and the glue is easy to leak during the pushing process. Therefore, in the prior art, a sealing ring is installed on the side wall of the piston to improve the sealing performance to avoid glue leakage during pushing.

[0003] For example, a Chinese patent with authorization announcement number CN219077914U discloses a sealing piston and glue packaging structure, in which the sealing piston includes a piston body, a one-way valve and a nut. The piston body includes a piston ring and a piston core arranged in the piston ring. The outer peripheral surface of the piston ring is provided with a groove for accommodating a deformable sealing ring. The bottom of the piston core is connected to the piston ring, and the piston core has a through hole; the one-way valve part is arranged in the through hole, the inlet of the one-way valve is close to the bottom of the piston core, and the outlet of the one-way valve is close to the top of the piston core; the nut is detachably connected to the piston core; when the nut is connected to the piston core, the nut closes the outlet of the one-way valve, and after the nut is separated from the piston core, the outlet of the one-way valve is exposed from the top of the piston core.

[0004] The prior art provides a groove for installing a deformable sealing ring on the outer circumference of the piston ring. When the sealing piston is installed in the rubber cylinder, the sealing ring is squeezed and deformed so as to fit tightly with the sealing piston and the rubber cylinder, thereby fixing the position of the sealing piston and achieving a good sealing effect, thereby preventing the piston from tilting or tipping over during use. However, the sealing ring is directly sleeved in the groove. As the piston is pushed, the glue directly squeezes the sealing ring, so that the sealing ring is not only subjected to the friction force with the rubber cylinder, but also squeezed by the glue, which may cause the sealing ring to deform excessively and then fall off from the groove, affecting the sealing stability. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a piston structure for a rubber cartridge, which can prevent excessive glue from contacting the sealing ring, stably support the piston, avoid tilting or tipping of the piston during use, prevent the sealing ring from being squeezed by the glue, and thus prevent the sealing ring from falling off, thereby ensuring the stability of the sealing ring during the piston advancement process.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A piston structure for a rubber cartridge, comprising:

[0008] The piston body comprises a piston head and a piston core arranged in the piston head; a vent hole is provided in the piston core; the bottom edge of the piston head is bent outward to form a rubber scraping portion abutting against the inner wall of the rubber cylinder, and the middle and top of the outer peripheral surface of the piston head are respectively provided with a first mounting groove and a second mounting groove; a support ring abutting against the inner wall of the rubber cylinder is installed in the first mounting groove; a sealing ring attached to the inner wall of the rubber cylinder is installed in the second mounting groove;

[0009] A one-way valve is arranged in the air vent, wherein the air inlet end of the one-way valve is located at the bottom of the air vent, and the air outlet end of the one-way valve is located at the top of the air vent;

[0010] And a sealing piece detachably arranged on the top of the air vent is used to seal the top of the air vent.

[0011] In some embodiments, the radius of the scraper portion is smaller than that of the support ring, and the radius of the support ring is smaller than that of the sealing ring.

[0012] In some embodiments, the outer ring of the sealing ring is provided with a plurality of arc-shaped protrusions, which are arranged in a wave shape.

[0013] In some embodiments, the radius of each of the arc-shaped protrusions is gradually reduced from the middle of the sealing ring to both sides.

[0014] In some embodiments, a glue containing groove is formed between the glue scraping portion and the piston core, and the glue containing groove is connected to a plurality of air guide grooves connected to the air holes.

[0015] In some embodiments, an anti-dropout portion for preventing the sealing ring from falling off extends from the top of the second mounting groove; the anti-dropout portion extends along the outer circumference of the sealing ring.

[0016] In some embodiments, anti-slip patterns are formed on the inner wall of the anti-slip portion to increase the friction between the anti-slip portion and the sealing ring.

[0017] In some embodiments, a connecting ring is extended from one end of the piston core toward the air outlet end of the air vent; a plurality of air grooves are provided on the inner wall of the connecting ring; the sealing member includes a blocking column for sealing the connecting ring and a blocking cover fixedly connected to the blocking column; the blocking cover is threadedly connected to the connecting portion, and when the two rotate relative to each other, the depth of the blocking column in the connecting ring is adjusted.

[0018] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects:

[0019] The present application provides a piston structure for a rubber cylinder, which scrapes off the glue on the inner wall of the rubber cylinder through a rubber scraping part to prevent excessive glue from contacting the sealing ring, and cooperates with the support ring in the middle to support the piston on the inner wall of the rubber cylinder, which can fix the position of the sealing piston to prevent the piston from tilting or tipping over during use, and then cooperates with the sealing ring on the top to form a seal, providing good sealing, preventing the sealing ring from being squeezed by the glue, and then preventing the sealing ring from falling off, ensuring the sealing of the piston and the stability of the sealing ring during the piston advancement process. At the same time, through the cooperation of the air vent and the one-way valve, the gas inside the rubber cylinder can be discharged, and the external gas can be prevented from entering the rubber cylinder, balancing the internal and external air pressures, avoiding the piston from being ejected due to the air pressure difference, and improving the stability and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the piston structure for the rubber cartridge in the embodiment of the utility model;

[0021] Figure 2 For the utility model Figure 1 Schematic diagram of the cross-sectional structure after cutting open;

[0022] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0024] In the figure: 1. piston body; 11. piston head; 111. first mounting groove; 112. second mounting groove; 12. piston core; 121. air vent; 2. glue scraping part; 21. glue containing groove; 3. support ring; 4. sealing ring; 41. arc-shaped protrusion; 5. one-way valve; 6. blocking part; 61. blocking column; 62. blocking cover; 7. air guide groove; 8. anti-slip part; 9. connecting ring; 91. air storage groove. DETAILED DESCRIPTION

[0025] The present disclosure is further described below in conjunction with the embodiments shown in the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0026] The utility model discloses a piston structure for a rubber cartridge, such as Figure 1 and Figure 2As shown, it includes a piston body 1, a one-way valve 5 and a sealing member 6; the piston body 1 includes a piston head 11 and a piston core 12 arranged in the center of the piston head 11, and a vent hole 121 is opened in the center of the piston core 12, so that after the piston body 1 is pressed into the rubber cylinder, the air can be discharged through the vent hole 121; the one-way valve 5 is arranged in the vent hole 121, and the air inlet end of the one-way valve 5 is located at the bottom of the vent hole 121, and the air outlet end is located at the top of the vent hole 121, which can discharge the gas inside the rubber cylinder and prevent the external gas from entering the rubber cylinder, so as to balance the internal and external air pressures; the sealing member 6 is a detachable sealing member 6 arranged on the top of the vent hole 121, which is used to seal the top of the vent hole 121, so that after the gas between the rubber cylinder and the piston is exhausted, the vent hole 121 is sealed by the sealing member 6, so as to facilitate the extrusion of glue through the piston.

[0027] Further, such as Figure 2 and Figure 3 As shown, a scraping portion 2 abutting against the inner wall of the rubber cylinder is bent outward at the bottom edge of the piston head 11, and a first mounting groove 111 and a second mounting groove 112 are respectively provided in the middle and top of the outer peripheral surface of the piston head 11; a support ring 3 abutting against the inner wall of the rubber cylinder is installed in the first mounting groove 111; a sealing ring 4 attached to the inner wall of the rubber cylinder is installed in the second mounting groove 112; in the process of the piston squeezing glue, the glue on the inner wall of the rubber cylinder is scraped off by the scraping portion 2 to prevent excessive glue from contacting the sealing ring 4, and the support ring 3 in the middle is used to support the piston on the inner wall of the rubber cylinder, which can fix the position of the sealing piston and prevent the piston from tilting or tipping over during use, and then cooperate with the sealing ring 4 at the top to form a seal, provide good sealing, prevent the sealing ring 4 from being squeezed by the glue, and then prevent the sealing ring 4 from falling off, thereby ensuring the sealing of the piston and the stability of the sealing ring 4 during the piston advancement process.

[0028] In some embodiments, Figure 2 and Figure 3 As shown, in order to further improve the stability of the sealing ring 4, an anti-slip portion 8 for preventing the sealing ring 4 from falling off is extended from the top of the second mounting groove 112; the anti-slip portion 8 extends along the outer periphery of the sealing ring 4, and the anti-slip portion 8 does not contact the inner wall of the rubber tube, and only limits the position of the sealing ring 4 to prevent the sealing ring 4 from falling off. Furthermore, an anti-slip pattern for increasing the friction between the anti-slip portion 8 and the sealing ring 4 is formed on the inner wall of the anti-slip portion 8. The anti-slip pattern can be a wave pattern or a plurality of evenly distributed friction protrusions to increase the friction between the anti-slip portion 8 and the sealing ring 4 and prevent the sealing ring 4 from easily falling off from the anti-slip portion 8.

[0029] In some real-time examples, such as Figure 2 and Figure 4As shown, during the process of the piston squeezing the glue, compressed gas may exist. In this embodiment, a connecting ring 9 is extended from one end of the piston core 12 toward the air outlet end of the air vent 121; a plurality of air grooves 91 are provided on the inner wall of the connecting ring 9; the blocking member 6 includes a blocking column 61 for sealing the connecting ring 9 and a blocking cover 62 fixedly connected to the blocking column 61; the blocking cover 62 is threadedly connected to the connecting portion, and when the two rotate relative to each other, the depth of the blocking column 61 in the connecting ring 9 is adjusted. When the piston is used to squeeze the glue to a certain depth, the blocking cover 62 is rotated to adjust the position of the blocking column 61, so that the lowest end air groove 91 is connected to the air vent 121, thereby allowing the compressed gas to be squeezed into the air groove 91; as the piston is further pressed down, the next air groove 91 can be adjusted to be connected to the air vent 121. In this embodiment, three air grooves 91 are configured to retain the compressed gas generated at the middle, lower middle and bottom positions of the rubber cylinder, respectively, so as to ensure that no bubbles are generated when squeezing the glue, thereby improving the use effect of the glue.

[0030] In some embodiments, Figure 2 and Figure 3 As shown, the radius of the scraper part 2 is smaller than the support ring 3, and the radius of the support ring 3 is smaller than the sealing ring 4, so that the scraper part 2, the support ring 3 and the sealing ring 4 form a stepped arrangement, and contact the inner wall of the rubber cylinder with different extrusion forces respectively, so that the scraper part 2 can scrape off the glue on the inner wall of the rubber cylinder, and use the support ring 3 to prevent the piston body 1 from tilting, and then cooperate with the sealing ring 4 to provide good sealing.

[0031] Further, such as Figure 2 and Figure 3 As shown, the outer ring of the sealing ring 4 is provided with a plurality of arc-shaped protrusions 41, which are arranged in a wave shape, so that when the sealing ring 4 deforms and contacts the inner wall of the rubber cylinder, multiple contact points are provided to prevent the sealing ring 4 from deviating. In this embodiment, the radius of each arc-shaped protrusion 41 is gradually reduced from the middle of the sealing ring 4 to both sides, so as to balance the stress points of the sealing ring 4 and improve the stability of its sealing operation.

[0032] In some embodiments, a glue containing groove 21 is formed between the glue scraping portion 2 and the piston core 12. The glue containing groove 21 is annular, and is connected to a plurality of air guide grooves 7 connected to the air hole 121. The air guide grooves 7 are distributed in an annular manner around the glue containing groove 21, so that the air guide grooves 7 extend from the bottom of the glue containing groove 21 to the air hole 121, thereby increasing the size of the air guide channel to facilitate rapid processing of gas discharge into the air hole 121.

[0033] The embodiment of the present application discloses a piston structure for a rubber cartridge, which scrapes off the glue on the inner wall of the rubber cartridge through the scraping part 2 to prevent excessive glue from contacting the sealing ring 4, and cooperates with the support ring 3 in the middle to support the piston on the inner wall of the rubber cartridge, which can fix the position of the sealing piston to prevent the piston from tilting or tipping over during use, and then cooperates with the sealing ring 4 at the top to form a seal, provide good sealing, prevent the sealing ring 4 from being squeezed by the glue, and then prevent the sealing ring 4 from falling off, and ensure the sealing of the piston and the stability of the sealing ring 4 during the piston advancement process. At the same time, through the cooperation of the air vent 121 and the one-way valve 5, the gas inside the rubber cartridge can be discharged, and the external gas can be prevented from entering the rubber cartridge, so as to balance the internal and external air pressures, avoid the piston from being ejected due to the air pressure difference, and improve the stability and safety of use.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A piston structure for a rubber cartridge, characterized in that: include: The piston body comprises a piston head and a piston core arranged in the piston head; a vent hole is provided in the piston core; the bottom edge of the piston head is bent outward to form a rubber scraping portion abutting against the inner wall of the rubber cylinder, and the middle and top of the outer peripheral surface of the piston head are respectively provided with a first mounting groove and a second mounting groove; a support ring abutting against the inner wall of the rubber cylinder is installed in the first mounting groove; a sealing ring attached to the inner wall of the rubber cylinder is installed in the second mounting groove; A one-way valve is arranged in the air vent, wherein the air inlet end of the one-way valve is located at the bottom of the air vent, and the air outlet end of the one-way valve is located at the top of the air vent; And a sealing piece detachably arranged on the top of the air vent is used to seal the top of the air vent.

2. A piston structure for a rubber cartridge according to claim 1, characterized in that: The radius of the scraper portion is smaller than that of the support ring, and the radius of the support ring is smaller than that of the sealing ring.

3. The piston structure for a rubber cartridge according to claim 1, characterized in that: The outer ring of the sealing ring is provided with a plurality of arc-shaped convex points, which are arranged in a wave shape.

4. The piston structure for a rubber cartridge according to claim 3, characterized in that: The radius of each of the arc-shaped protrusions is gradually reduced from the middle of the sealing ring to both sides.

5. The piston structure for a rubber cartridge according to claim 1, characterized in that: A glue containing groove is formed between the glue scraping part and the piston core, and a plurality of air guiding grooves connected with the air vents are connected to the glue containing groove.

6. The piston structure for a rubber cartridge according to claim 1, characterized in that: An anti-dropout portion for preventing the sealing ring from falling off extends from the top of the second mounting groove; the anti-dropout portion extends along the outer circumference of the sealing ring.

7. The piston structure for a rubber cartridge according to claim 6, characterized in that: The inner wall of the anti-slip part is formed with anti-slip lines for increasing the friction between the anti-slip part and the sealing ring.

8. The piston structure for a rubber cartridge according to claim 1, characterized in that: A connecting ring is extended from one end of the piston core toward the air outlet end of the air vent; a plurality of air grooves are provided on the inner wall of the connecting ring; the sealing member includes a blocking column for sealing the connecting ring and a blocking cover fixedly connected to the blocking column; the blocking cover is threadedly connected to the connecting portion, and when the two rotate relative to each other, the depth of the blocking column in the connecting ring is adjusted.

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