Push rod sealing piece, sealing connecting assembly and push rod glue injection machine

Abstract

The utility model discloses a push rod sealing piece, a sealing connection assembly and a push rod glue injection machine. The push rod sealing piece is contained in a connecting piece of the push rod glue injection machine, the connecting piece comprises a first connector, a second connector and a third connector which are communicated with one another, the first connector and the second connector are oppositely arranged to form a first channel which at least partially contains a push rod of the driving piece and can enable the push rod to do reciprocating motion, and the second connector is used for being connected with the driving piece. The third interface is used for communicating the rubber sleeve and the first passage, the connecting position of the third interface and the first passage is arranged in a reciprocating path of the push rod, and the push rod sealing element is arranged in the first passage and comprises a base part with a cavity, an outer sealing element and an inner sealing element; the cavity of the base part is used for partially sealing and accommodating the push rod, and a through hole is formed in the position, corresponding to the third connector of the connecting piece, of the base part; the outer sealing pieces are fixedly arranged on the outer wall of the base on the two sides of the through hole respectively, and the inner sealing pieces are fixedly arranged on the inner wall of the base and located on the reciprocating path of the push rod on the side, close to the first connector, of the through hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of glue injection equipment, and specifically relates to a push rod seal, a sealing connection component and a push rod glue injection machine, and is particularly suitable for a pneumatic glue injection gun. Background Art

[0002] A push rod glue injection machine is a device that can manually, pneumatically or hydraulically squeeze a specific colloid from a glue cylinder storing the colloid to a specific position to complete the injection. For example, Chinese patent CN201832765U and Chinese patent CN216631423U respectively show two devices with pneumatic glue injection chambers of different structures.

[0003] In the prior art, a push rod glue injection machine generally includes a connecting piece with a hollow cavity, a driving piece and a glue cylinder, wherein the connecting piece is connected to the driving piece and the glue cylinder respectively. The glue cylinder contains a glue, and the glue can be injected into the cavity of the connecting piece manually or pneumatically. The driving piece includes a driving part and a push rod, and the push rod reciprocates under the action of the driving part. The push rod is accommodated in the cavity of the connecting piece and is used to drive the glue to move to a set position to realize automatic glue injection.

[0004] However, the inventor of the utility model discovered during long-term use that at least one problem with the existing push rod glue injection machine is that when the colloid is driven to move to the set position by the push rod, due to the reciprocating motion of the push rod, part of the colloid will be retained in the connecting part along with the push rod. What is more serious is that during use, the colloid often leaks out from the connection between the driving part and the connecting part, which not only wastes the colloid, but also affects the operator's use and storage, resulting in a poor experience. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a push rod seal, a sealing connection assembly and a push rod glue injection machine to solve the problems of poor sealing effect and colloid leakage in the existing push rod glue injection machines.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present invention adopts the following technical solutions:

[0007] A push rod seal is accommodated in a connecting piece of a push rod injection machine, the connecting piece includes a first interface, a second interface and a third interface that are interconnected, the first interface and the second interface are relatively arranged to form a first passage that at least partially accommodates a push rod of a driving member and allows the push rod to reciprocate, the second interface is used to engage the driving member, the third interface is used to connect the rubber cylinder and the first passage, the connection position of the third interface and the first passage is arranged in the reciprocating path of the push rod, the push rod seal is arranged in the first passage, includes a base with a cavity, an outer seal and an inner seal; the cavity of the base is used to partially seal and accommodate the push rod, and a through hole is provided at a position of the base corresponding to the third interface of the connecting piece; a plurality of the outer seals are respectively fixed on the outer walls of the base on both sides of the through hole, and the inner seal is fixed on the inner wall of the base on the reciprocating path of the push rod from the through hole to the first interface.

[0008] As an embodiment of the utility model, it also includes a collar, which is accommodated in a cavity between the through hole and the second interface, the outer wall of the collar is interference fit with the base, and the inner wall is sealed and fastened to the push rod.

[0009] As an implementation mode of the utility model, a protrusion is provided on the inner wall of the base to resist the ring.

[0010] As an implementation mode of the utility model, a plurality of inner seals are provided, and the plurality of inner seals are arranged at intervals.

[0011] As an implementation mode of the utility model, a groove for engaging with the inner sealing member is provided on the inner wall of the base.

[0012] As an implementation mode of the utility model, a plurality of through holes are provided, and the plurality of through holes are mutually penetrating and provided in the circumferential direction at the same axial position of the base.

[0013] The second aspect of the utility model provides a sealing connection assembly, including a connecting member and the push rod seal described in the first aspect of the utility model, the connecting member includes a first interface interconnected, a second interface for connecting a driving member and a third interface for connecting a rubber cartridge, the first interface is used to drive the colloid injected from the rubber cartridge to move to a set position under the reciprocating motion of the push rod of the driving member; the first interface and the second interface constitute a first passage; the push rod seal is accommodated in the first passage; wherein the size of the through hole is not larger than the size of the third interface, and the base of the push rod seal is in contact with the inner wall of the first passage of the connecting member.

[0014] As an embodiment of the utility model, a step portion is fixedly provided on the inner wall of the first passage of the base for resisting the push rod seal, and the size of the first passage in the area corresponding to the step portion is larger than the size of the cavity of the base of the push rod seal.

[0015] As an embodiment of the present utility model, the connecting member also includes a washer and a threaded member, and the threaded member is fixed to the third interface of the connecting member; the washer is arranged between the threaded member and the connecting member; the threaded member is roughly annular in structure, and a screw is arranged on the inner wall of the threaded member for threading with the rubber cylinder; or, the connecting member is provided with a thread at the position of the third interface for threading with the rubber cylinder.

[0016] According to a third aspect of the present invention, there is provided a push rod glue injection machine, comprising a connecting member, a driving member, a glue cylinder and the sealing connection assembly according to the second aspect of the present invention, wherein the driving member comprises a push rod and a driving part for driving the push rod to reciprocate from an initial position to a farthest position; the driving member and the second interface of the connecting member are detachably fixed, the push rod is partially accommodated in the cavity of the push rod seal and is sealed with the push rod seal; the glue cylinder is used to inject the glue in the glue cylinder into the cavity of the push rod seal, and the glue cylinder and the third interface of the connecting member are detachably sealed and fixed; wherein the initial position of the push rod is flush with the edge of the through hole on the side close to the second interface, or is arranged at the position of the through hole facing the second interface, and the farthest position of the push rod is arranged on the side of the inner seal close to the first interface.

[0017] Compared with the prior art, the utility model includes at least one of the following beneficial technical effects. Through the scheme of the utility model, by setting a push rod seal in the connecting part, and at least setting a push rod seal, by setting a base, a through hole, an inner seal and an outer seal, the problem of colloid reflux can be well solved, the user experience of the entire push rod injection machine can be improved, and the problem of poor sealing effect and colloid leakage of the existing push rod injection machine can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a structural schematic diagram of a push rod glue injection machine according to a specific embodiment of the utility model;

[0020] Figure 2It is an exploded view of a sealing connection assembly and a driving member of a specific embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional view of a sealing connection assembly and a driving member of a specific embodiment of the utility model;

[0022] Figure 4 It is another cross-sectional view of a sealing connection assembly and a driving member according to a specific embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 10, connector; 11, first interface; 12, second interface; 13, third interface; 14, first passage; 15, second passage; 16, step; 17, notch; 18, washer; 19, threaded member;

[0025] 100, push rod seal; 110, base; 111, through hole; 112, outer seal groove; 113, inner seal groove; 120, outer seal; 130, inner seal; 140, collar;

[0026] 20, rubber cartridge;

[0027] 30, driving member; 31, push rod; 32, driving part. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the directional words used, such as "upper", "lower", "left", "right", "front", and "back", generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0029] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In addition, in the following embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in one embodiment, please refer to the relevant description of other embodiments.

[0030] See also Figure 1-4, a push rod seal 100 is shown in the figure, and the push rod seal 100 is accommodated in the connecting member 10 and has an interference fit with the connecting member 10. In order to better understand the push rod seal 100 provided by the utility model, the connecting member 10 is first introduced below.

[0031] The connector 10 is a cavity with a hollow interface, including a first interface 11, a second interface 12 and a third interface 13 that are interconnected. The first interface and the second interface are relatively arranged to form a first passage 14, and the third interface 13 is arranged between the first interface and the second interface to form a second passage 15 connected to the first passage 14.

[0032] The first interface is used to guide the colloid in the connector 10 to move to the set position. This guiding process can be achieved by the structure of the connector 10 itself, or by connecting other components, such as a detachable cone-shaped guide to better guide the colloid to the set position. The utility model does not impose any restrictions on this.

[0033] The second interface of the connector 10 is used for detachably fixedly connecting with the driving member 30, so that the push rod 31 is at least partially accommodated in the first passage 14 and can reciprocate in the first passage 14. The third interface 13 of the connector 10 is used for detachably fixedly connecting with the rubber cartridge 20. The rubber cartridge 20 is used to inject the colloid in the rubber cartridge 20 into the push rod seal 100. Preferably, the rubber cartridge 20 has a movable rubber chamber for accommodating the colloid, and is connected to an air pump, and the area of ​​the chamber is reduced by the air pump, thereby realizing the injection of the colloid into the push rod seal 100.

[0034] Preferably, the first interface and the second interface are arranged in the same direction facing each other, and the third interface 13 is arranged between the first interface and the second interface. Figure 3-4 In this specific embodiment, the first interface and the second interface are arranged along the left and right directions of the picture, and the third interface 13 is arranged above the side wall of the connecting member 10. The advantage of such an arrangement is that the colloid in the connecting member 10 can be driven to the set position by the push rod 31 more efficiently, and the colloid retained in the connecting member 10 is minimized.

[0035] The push rod seal 100 is accommodated in the cavity of the connector 10 and is interference fit with the connector 10 to achieve relative stillness. Specifically, the push rod seal 100 is accommodated in the first passage 14 on one side close to the second interface and is at least partially located on the reciprocating path of the push rod 31.

[0036] The push rod seal 100 includes a base 110 with a hollow interface, an outer seal 120, an inner seal 130 and a collar 140. A through hole 111 is provided at a position corresponding to the third interface 13 on the base 110, which is used to communicate with the rubber cylinder 20, so that the colloid can enter the push rod seal 100. The outer seal 120 is respectively sleeved on one side of the outer wall of the base 110 close to the first interface and the second interface, and the outer seal 120 is used to seal the base 110 and the connector 10 of the push rod seal 100. The inner seal 130 is sleeved on one side of the inner wall of the base 110 close to the first interface and is arranged on the reciprocating path of the push rod 31, and the inner seal 130 is used to selectively seal the base 110 and the push rod 31. The collar 140 is sleeved on one side of the inner wall of the base 110 close to the second interface. The outer wall of the collar 140 is interference-sealed with the base 110, and the push rod 31 passes through the collar 140 and is in close contact with the inner wall of the collar 140. The advantage of setting the collar 140 is that the collar can be set as a standard part, reducing the difficulty of processing parts and better realizing structural manufacturing.

[0037] Please continue reading Figure 1-4 The push rod 31 reciprocates in the first passage 14 from the second interface to the first interface, that is, the first passage 14 reciprocates from the initial position close to the second interface to the farthest position close to the first interface. It can be naturally understood that the part of the push rod 31 from the initial position to the farthest position of the first passage 14 is the reciprocating path of the push rod 31.

[0038] The through hole 111 is arranged on the reciprocating motion path of the push rod 31, that is, the through hole 111 is arranged on the side of the initial position of the push rod 31 close to the second interface. Figure 3-4 In this specific embodiment, the through hole 111 is arranged on the left side of the initial position of the push rod 31. The advantage of such an arrangement is that the push rod 31 can drive the first interface of the colloid phase flowing in from the through hole 111 to move while performing reciprocating motion, and then reach the set position. Preferably, a plurality of through holes 111 are arranged in the circumferential direction at the same axial position of the base 110, for example, three or four ( Figure 1 The advantage of such a configuration is that it can reduce the difficulty of the operator to align the through hole 111 with the third interface 13 during installation, or at least partially align the through hole 111 to ensure that the through hole 111 is connected to the second passage 15, thereby improving the efficiency of installation and parts replacement.

[0039] Similarly, the inner seal 130 is also arranged on the reciprocating path of the push rod 31, and the inner seal 130 is arranged on the side of the through hole 111 close to the first interface. The advantage of such arrangement is that, since the inner seal 130 is located on the reciprocating path of the push rod 31, when the push rod 31 is reset from the farthest position to the initial position, the presence of the inner seal 130 can minimize the amount of colloid brought back to the initial position of the push rod 31 by the push rod 31, thereby preventing the colloid from leaking from the connection between the driving member 30 and the connecting member 10 to the greatest extent.

[0040] Preferably, a plurality of inner seals 130 are provided, and are sequentially spaced apart in the direction from the first interface of the through hole 111. Figure 1-4 In this specific embodiment, two inner seals 130 are provided, including an inner seal 1 and an inner seal 2, and the inner seal 1 is provided on the side of the inner seal 2 close to the first interface and is provided at intervals. The advantage of such a setting is that when the colloid moves from the farthest position to the initial position on the push rod 31, even if the colloid is brought back to the initial position by the push rod 31, by providing multiple inner seals 130 at intervals, since each inner seal 130 is sealed with the push rod 31, the brought back colloid is kept between the multiple inner seals 130 as much as possible, thereby further preventing the colloid from leaking from the connection between the driving member 30 and the connecting member 10.

[0041] In a specific embodiment, the inner seal 130 is an elastic seal, such as a rubber seal. The advantage of such a setting is that it can increase the sealing degree between the inner seal 130 and the push rod 31 and prevent the colloid from leaking from the connection between the driving member 30 and the connecting member 10 as much as possible.

[0042] In a specific embodiment, the initial position of the push rod 31 is set at a position where the through hole 111 is slightly toward the second interface, or is flush with the edge of the through hole 111 on the side close to the second interface. The advantage of such a setting is that it can increase the distance between the initial position of the push rod 31 and the second interface as much as possible without affecting the injection of colloid through the through hole 111, thereby increasing the sealing path and reducing the leakage of colloid.

[0043] In a specific embodiment, the farthest position of the push rod 31 is set on a side of the inner sealing groove 113 close to the first interface. When multiple inner sealing grooves 113 are provided, the sealing groove closest to the first interface among the multiple inner sealing grooves 113 is set on a side close to the first interface. The purpose of such a setting is to retain the colloid as much as possible through the inner sealing groove 113 to prevent the colloid from being brought back under the drive of the push rod 31.

[0044] Please continue reading Figure 3-4As for the fixing of the inner seal 130 and the base 110, as long as the inner seal 130 and the inner wall of the base 110 can be relatively fixed, the utility model does not limit this, for example, welding, clamping, riveting and other methods are all possible. In a preferred embodiment, the base 110 is provided with a clamping groove at a position corresponding to the inner seal 130 for detachably clamping with the inner seal 130. The advantage of such a setting is that since the inner seal 130 needs to participate in each reciprocating motion of the push rod 31, its life is relatively poor. By setting it to be clamped by the clamping groove, the inner seal 130 can be well installed and replaced, thereby improving the replacement efficiency and reducing the use cost of the entire push rod seal 100.

[0045] Similarly, there may be multiple ways to fix the outer seal 120 to the base 110, such as welding, clamping, riveting, etc., but it is preferred to provide a clamping groove on the outer wall of the base 110 to achieve a detachable clamping with the outer seal 120 to achieve better leakage prevention, which will not be described in detail.

[0046] There are multiple, at least two, outer seals 120, including an outer seal 1 fixedly arranged on the outer wall of the base 110 near the first interface, and an outer seal 2 fixedly arranged on the inner wall of the base 110 near the second interface. The outer seal 1 and the outer seal 2 are arranged on both sides of the third interface 13 corresponding to the base 110. Naturally, when the number of outer seals 120 is greater than two, the rest can be arranged at intervals beside the outer seal 1 and / or the outer seal 2.

[0047] The benefit of setting the outer seal 120 is that the sealing performance of the entire base 110 and the connector 10 can be well improved. The benefit of setting the outer seal 1 and the outer seal 2 on both sides of the third interface 13 corresponding to the base 110 is that, on the one hand, when installing the push rod seal 100 in the connector 10, due to installation problems, there may be a situation where the through hole 111 is only partially connected to the third interface 13, which may cause part of the colloid to flow into the gap between the base 110 of the push rod seal 100 and the connector 10, and then cause part of the colloid to leak along the gap. At the same time, considering that multiple through holes 111 may be provided for easy installation, it is more necessary to seal and restrict both sides of the through hole 111 of the base 110 to avoid colloid leakage.

[0048] On the other hand, as mentioned above, during the reciprocating motion of the push rod 31, part of the colloid may move in the first passage 14 along the second interface direction under the drive of the push rod 31. Since the push rod seal 100 is accommodated in the first passage 14 of the connector 10, part of the colloid in the first passage 14 may flow into the gap between the push rod seal 100 and the connector 10. By providing the external seal 120, this part of the alternating backflow can be well blocked.

[0049] Please continue reading Figure 3-4 , the through hole 111 of the base 110 is located in the area corresponding to the third interface 13 of the connector 10, the size of the through hole 111 is not larger than the size of the third interface 13, and the outer wall of the base 110 is in contact with the inner wall of the first passage 14 of the connector 10. The advantage of such a setting is that by making the size of the through hole 111 not larger than the size of the third interface 13, the through hole 111 and the third interface 13 can be well sealed, and the sealing pressure of the outer seal 120 can be reduced. In other words, if the size of the third interface 13 is smaller than the size of the third interface 13, part of the colloid will inevitably flow from the gap at the connection between the through hole 111 and the third interface 13, which will lead to a large sealing pressure of the outer seal 120, and it is easy to leak the colloid. By setting the size of the through hole 111 to be no larger than the size of the third interface 13 and making the outer wall of the base 110 fit the inner wall of the first passage 14 of the connector 10, the outer wall of the base 110 and the inner wall of the connector 10 first form a first layer of seal, and coupled with the seal of the outer seal 120, even if there is colloid leakage, the double-layer seal can also prevent colloid leakage to the greatest extent.

[0050] Similarly, the connector 10 is provided with a notch 17 on the opposite side of the second interface. The notch 17 is used as a drill hole. The notch 17 is preferably triangular, but can also be other shapes. The size of the notch 17 is not less than the size of the third interface 13. The advantage of such a setting is that by adding the notch 17 space, a certain leakage space is given to the fluid, thereby avoiding excessive sealing pressure of the outer seal 120.

[0051] Please continue reading Figure 3-4 , a step portion 16 is integrally provided in the first passage 14 of the connector 10, and the step portion 16 is a portion of the inner wall of the connector 10 protruding inward. The step portion 16 is used to achieve resistance to the push rod seal 100, thereby completing the position limit of the push rod seal 100. Preferably, the size of the first passage 14 in the area corresponding to the step portion 16 is smaller than the size of the cavity of the push rod seal 100. The advantage of such a setting is that, due to the existence of the step portion 16, the size of the first passage 14 in the area of ​​the step portion 16 is smaller than the size of the first passage 14 in the area of ​​the non-step portion, firstly, the position limit of the push rod seal 100 can be completed, which is convenient for the operator to install. At the same time, since the size of the first passage 14 in the area corresponding to the step portion 16 is larger than the size of the cavity of the push rod seal 100, when the colloid moves toward the direction of the first interface under the action of the push rod 31, the pressure on the colloid in the area of ​​the first passage 14 corresponding to the step portion 16 is small, thereby reducing the colloid backflow toward the second interface and reducing the sealing pressure of the inner seal 130.

[0052] Please continue reading Figure 3-4 Similarly, the collar 140 is disposed in the cavity of the base 110 of the push rod seal 100 on one side close to the second interface, and a protrusion is disposed on the base 110 of the push rod seal 100 to resist the collar 140 to limit the position of the collar 140, thereby facilitating installation by operators. The collar 140 and the protrusion are interference-fitted to achieve sealing, and the inner wall of the collar 140 is sealed and connected to the push rod 31.

[0053] Therefore, through the solution of the utility model, by setting a push rod seal 100 in the connecting member 10, and at least setting a push rod seal 100, by setting a base 110, a through hole 111, an inner seal 130 and an outer seal 120, the problem of colloid reflux can be well solved, and the user experience of the entire push rod 31 injection machine can be improved.

[0054] Correspondingly, the utility model also provides a sealing connection assembly, which includes a connector 10 and the aforementioned push rod seal 100 , wherein the push rod seal 100 is removably sealed and accommodated in a side of the first passage 14 of the connector 10 close to the second interface.

[0055] It can be understood that the advantage of separately providing the push rod seal 100 is that it can be more convenient for maintenance and replacement, thereby reducing the overall manufacturing cost.

[0056] Please continue reading Figure 1-4 The connector 10 further includes a washer 18 and a threaded member 19 disposed on the third interface 13. The washer 18 is disposed between the threaded member 19 and the third interface 13 of the connector 10 to improve the sealing ability of the connection. The threaded member 19 is used to be threadedly connected to the connector 10. The threaded member 19 is an annular structure. The inner wall of the threaded member 19 is provided with threads for threading with the rubber cartridge 20, thereby fixing the rubber cartridge 20 to the connector 10. The advantage of such a configuration is that, in the prior art, most of the rubber cartridges 20 are cylindrical structures with threaded protrusions at the ends. Such a design can well match the vast majority of rubber cartridges 20 on the market, thereby improving adaptability.

[0057] Of course, as an alternative, the connecting member 10 may be directly provided with threads at the position of the third interface 13 to achieve threaded fixation with the rubber cylinder 20 .

[0058] Correspondingly, the utility model also provides a push rod 31 glue injection machine, including a glue cartridge 20, a driving member 30 and the aforementioned sealing connection assembly. The glue cartridge 20 and the third interface 13 of the connecting member 10 are preferably detachably sealed and connected by bolts, the driving member 30 and the connecting member 10 are preferably detachably connected by threads, and the push rod 31 is at least partially sleeved in the cavity of the push rod seal 100.

[0059] The above is a detailed introduction to the scheme of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

[0060] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0061] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0062] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

Claims

1. A push rod seal, accommodated in a connector of a push rod glue injection machine, the connector comprising a first interface, a second interface and a third interface that are interconnected, the first interface and the second interface are arranged relative to each other to form a first passage that at least partially accommodates a push rod of a driving member and enables the push rod to reciprocate, the second interface is used to engage the driving member, the third interface is used to connect the glue cylinder and the first passage, the connection position of the third interface and the first passage is arranged in the reciprocating path of the push rod, and is characterized in that: The push rod seal is disposed in the first passage, and includes a base having a cavity, an outer seal and an inner seal; The cavity of the base is used to partially seal and accommodate the push rod, and a through hole is provided at a position of the base corresponding to the third interface of the connecting member; The plurality of outer sealing members are respectively fixed on the outer walls of the base on both sides of the through hole. The inner sealing member is fixedly arranged on the inner wall of the base on the reciprocating path of the push rod from the through hole to one side of the first interface.

2. The push rod seal according to claim 1, characterized in that It also includes a collar, which is accommodated in a cavity between the through hole and the second interface, the outer wall of the collar is interference-fitted with the base, and the inner wall is sealed and fastened with the push rod.

3. The push rod seal according to claim 2, characterized in that: A protrusion is arranged on the inner wall of the base to resist the ring.

4. The push rod seal according to any one of claims 1 to 3, characterized in that: There are multiple inner seals, and the multiple inner seals are arranged at intervals.

5. The push rod seal according to claim 4, characterized in that: The inner wall of the base is provided with a groove for clamping with the inner sealing member.

6. The push rod seal according to any one of claims 1 to 3, characterized in that: The through holes are provided in plurality, and the plurality of through holes are mutually penetrated and provided in the circumferential direction at the same axial position of the base.

7. A sealing connection assembly, characterized in that: It comprises a connector and the push rod seal according to any one of claims 1 to 6, wherein the size of the through hole is not larger than the size of the third interface, and the base of the push rod seal fits against the inner wall of the first passage of the connector.

8. A sealing connection assembly according to claim 7, characterized in that: A step portion is fixedly provided on the inner wall of the first passage of the base for resisting the push rod seal, and the size of the first passage in the area corresponding to the step portion is larger than the size of the cavity of the base of the push rod seal.

9. The sealing connection assembly according to claim 7, characterized in that: The connecting member further comprises a washer and a threaded member, the threaded member is fixed to the third interface of the connecting member; the washer is arranged between the threaded member and the connecting member; the threaded member is generally annular in structure, and a screw is arranged on the inner wall of the threaded member for threading with the rubber cylinder; Alternatively, the connecting member is provided with a thread at the position of the third interface for threaded fixation with the rubber cylinder.

10. A push rod glue injection machine, characterized in that: It comprises a connecting member, a driving member, a rubber cartridge and a sealing connection assembly according to any one of claims 7 to 8, The driving member includes a push rod and a driving portion for driving the push rod to reciprocate from an initial position to a farthest position; The driving member is detachably fixed to the second interface of the connecting member, and the push rod portion is accommodated in the cavity of the push rod seal and is sealedly connected to the push rod seal; The rubber cartridge is used to inject the colloid in the rubber cartridge into the cavity of the push rod seal, and the rubber cartridge is detachably sealed and fixed to the third interface of the connector; Wherein, the initial position of the push rod is flush with the edge of the through hole on the side close to the second interface, or is arranged at the position of the through hole facing the second interface; The farthest position of the push rod is arranged on a side of the inner seal close to the first interface.

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