Double-guide multi-layer combined sealing structure for spraying machine

Abstract

A double-guide multi-layer combined sealing structure used on a spraying machine comprises a motor shell, a mounting cavity is formed in the motor shell, a plunger seat is fixedly arranged in the mounting cavity, and a ball plunger rod capable of reciprocating along the axis of the plunger seat is arranged in the plunger seat. A first guide copper sleeve and a second guide copper sleeve are in sliding fit with the outer walls of the two ends of the ball head plunger rod correspondingly, the first guide copper sleeve is fixedly connected with the mounting cavity, and the second guide copper sleeve is fixedly connected with the end, away from the first guide copper sleeve, of the plunger base. A sealing assembly is arranged in an area defined by the installation cavity and the ball head plunger rod and located between the plunger seat and the first guide copper sleeve, the sealing assembly comprises a multi-lip sealing ring and a combined check ring piece, sealing lips of the multi-lip sealing ring abut against the wall face of the ball head plunger rod, and the back of the multi-lip sealing ring abuts against the installation cavity. The first guide copper sleeve and the second guide copper sleeve are arranged at the two ends of the ball head plunger rod correspondingly, the straightness of the ball head plunger rod in the axial movement process is greatly guaranteed, and the situation that the service life of a sealing ring is shortened due to deflection is avoided.

Description

Technical Field

[0001] This invention relates to a dual-guided multi-layer combined sealing structure for use in a spraying machine. Background Technology

[0002] In paint spraying operations, various types of spraying machines have emerged to improve spraying efficiency and reduce the labor intensity of workers. Among them, the ball-head plunger rod is a crucial part of the spraying machine, and its performance directly affects the reliability of the equipment and the spraying quality. However, in existing technologies, the surface of the ball-head plunger rod is easily worn under long-term reciprocating motion, leading to a significant decrease in sealing performance; therefore, existing technologies still need improvement and development. Summary of the Invention

[0003] To address the shortcomings mentioned above, this invention provides a dual-guided multi-layer combined sealing structure for use in spray painting machines.

[0004] To achieve the above objectives, the present invention provides a dual-guided multi-layer combined sealing structure for a spraying machine, comprising a motor housing, an installation cavity within the motor housing, and a plunger seat fixed within the installation cavity. The plunger seat contains a ball-head plunger rod capable of reciprocating along its axis. Guide copper sleeve one and guide copper sleeve two are slidably fitted to the outer walls of both ends of the ball-head plunger rod, respectively. Guide copper sleeve one is fixedly connected to the installation cavity, and guide copper sleeve two is fixedly connected to the end of the plunger seat away from guide copper sleeve one. A sealing assembly is provided in the area enclosed by the installation cavity and the ball-head plunger rod, and between the plunger seat and guide copper sleeve one. The sealing assembly includes a multi-lip sealing ring and a combined retaining ring. The sealing lip of the multi-lip sealing ring abuts against the wall of the ball-head plunger rod, and its back abuts against the installation cavity. At least two combined retaining rings are respectively abutted against both axial ends of the multi-lip sealing ring to cooperate with the multi-lip sealing ring to achieve a seal between the installation cavity and the ball-head plunger rod.

[0005] Furthermore, the mounting cavity is arranged along the axis as through hole one, through hole two, and through hole three, with the inner diameters of through hole one, through hole two, and through hole three decreasing sequentially. The plunger seat is detachably fixed to through hole one, and the inner wall is provided with an annular protrusion separating the guide copper sleeve two and the combined retaining ring. The guide copper sleeve one abuts against the lower wall of through hole two and is fixed to it. The ball-head plunger rod is clearance-fitted with through hole three.

[0006] Furthermore, the plunger seat is connected to the inner wall of the through hole by a thread.

[0007] Furthermore, the outer wall of the plunger seat is provided with at least one annular mounting groove, and a sealing ring is provided in the annular mounting groove, the sealing ring abutting against the inner wall of the through hole.

[0008] Furthermore, the outer wall surface of the multi-lip sealing ring is provided with at least one annular mounting groove II, and the annular mounting groove II is provided with a sealing ring II, which abuts against the inner wall of the through hole II.

[0009] Furthermore, there are two combined retaining ring components near the plunger seat, symmetrically arranged through an I-shaped sealing seat. The combined retaining ring component includes a retaining ring and a sealing ring one. The inner sidewall of the retaining ring abuts against the outer wall surface of the ball-head plunger rod, and the outer sidewall is provided with an installation curved surface for mounting the sealing ring one. The installation curved surface fits the sealing ring one.

[0010] The advantages of this invention over the prior art are as follows: In this invention, guide copper sleeve one and guide copper sleeve two are respectively located at both ends of the ball head plunger rod, which greatly ensures the straightness of the ball head plunger rod during axial movement and avoids the shortening of the sealing ring life caused by wobble; at the same time, the use of multi-lip sealing rings in conjunction with combined retaining ring parts makes it wear-resistant and has multiple sealing layers, greatly improving the sealing life. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of a dual-guided multi-layer combined sealing structure for a spraying machine according to the present invention. Detailed Implementation

[0012] like Figure 1 As shown in the figure, an embodiment of the present invention provides a double-guided multi-layer combined sealing structure for a spraying machine, including a motor housing 100. The motor housing 100 has an installation cavity 110, and a plunger seat 200 is fixedly installed in the installation cavity 110. The plunger seat 200 has a ball-head plunger rod 300 that can reciprocate along its axis. The outer walls of the two ends of the ball-head plunger rod 300 are respectively slidably fitted with a guide copper sleeve 400 and a guide copper sleeve 500. The guide copper sleeve 400 is fixedly connected to the installation cavity 110, and the guide copper sleeve 500 is fixedly connected to the end of the plunger seat 200 away from the guide copper sleeve 400. The axes of the ball-head plunger rod 300, the guide copper sleeve 400, and the guide copper sleeve 500 are the same straight line, which greatly ensures the straightness of the ball-head plunger rod 300 when it moves axially.

[0013] Furthermore, such as Figure 1 As shown, in this embodiment, a sealing assembly is provided in the area formed by the mounting cavity 110 and the ball plunger rod 300, and located between the plunger seat 200 and the guide copper sleeve 400. The sealing assembly includes a multi-lip sealing ring 600 and a combined retaining ring 700. The sealing lip of the multi-lip sealing ring 600 abuts against the wall of the ball plunger rod 300, and its back abuts against the mounting cavity 110. There are at least two combined retaining rings 700, which are respectively abutted against the axial ends of the multi-lip sealing ring 600 to cooperate with the multi-lip sealing ring 600 to achieve a seal between the mounting cavity 110 and the ball plunger rod 300. The use of the multi-lip sealing ring 600 and the combined retaining ring 700 is wear-resistant and has multiple sealing layers, greatly improving the sealing life.

[0014] Furthermore, such as Figure 1 As shown, in this embodiment, the mounting cavity 110 is arranged along the axis as through hole one 111, through hole two 112, and through hole three 113. The inner diameters of through hole one 111, through hole two 112, and through hole three 113 decrease sequentially. The plunger seat 200 is detachably fixed to through hole one 111. The inner wall is provided with an annular protrusion 201 for separating guide copper sleeve two 500 and combined retaining ring 700. Guide copper sleeve one 400 abuts against the lower wall surface of through hole two 112 and is fixed to it. The ball head plunger rod 300 is clearance-fitted with through hole three 113. Specifically, the plunger seat 200 is connected to the inner wall of through hole one 111 by thread. The connection method is simple and can fix the position of the sealing assembly in the axial direction.

[0015] Furthermore, such as Figure 1 As shown, in this embodiment, the outer wall surface of the plunger seat 200 is provided with at least one annular mounting groove 202, and a sealing ring 1 is provided in the annular mounting groove 202. The sealing ring 1 abuts against the inner wall of the through hole 111, and the sealing ring 1 increases the sealing between the through hole 111 and the plunger seat 200.

[0016] Furthermore, such as Figure 1 As shown, in this embodiment, the outer wall surface of the multi-lip sealing ring 600 is provided with at least one annular mounting groove 601, and the annular mounting groove 601 is provided with a sealing ring 2. The sealing ring 2 abuts against the inner wall of the through hole 112, and the sealing ring 2 increases the sealing between the through hole 112 and the multi-lip sealing ring 600.

[0017] Furthermore, such as Figure 1 As shown, in this embodiment, there are two combined retaining ring components 700 near the plunger seat 200, which are symmetrically arranged through the I-shaped sealing seat 800. The combined retaining ring component 700 includes a retaining ring 710 and a sealing ring 720. The inner side wall of the retaining ring 710 abuts against the outer wall of the ball head plunger rod 300, and the outer side wall is provided with an installation curved surface 711 for mounting the sealing ring 720. The installation curved surface 711 fits with the sealing ring 720.

[0018] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-guided multi-layer combined sealing structure for use in a spraying machine, characterized in that: The device includes a motor housing (100), a mounting cavity (110) is provided inside the motor housing (100), and a plunger seat (200) is fixedly installed inside the mounting cavity (110). A ball-head plunger rod (300) reciprocates along its axis is provided inside the plunger seat (200). Guide copper sleeves 1 (400) and 2 (500) are slidably fitted on the outer walls of both ends of the ball-head plunger rod (300). Guide copper sleeve 1 (400) is fixedly connected to the mounting cavity (110), and guide copper sleeve 2 (500) is fixedly connected to the end of the plunger seat (200) away from guide copper sleeve 1 (400). The mounting cavity (110)... A sealing assembly is provided in the area enclosed by the ball plunger rod (300) and the plunger seat (200) and the guide copper sleeve (400). The sealing assembly includes a multi-lip seal ring (600) and a combined retaining ring (700). The sealing lip of the multi-lip seal ring (600) abuts against the wall of the ball plunger rod (300) and the back abuts against the mounting cavity (110). There are at least two combined retaining rings (700) and they are respectively abutted against the axial ends of the multi-lip seal ring (600) to cooperate with the multi-lip seal ring (600) to achieve a seal between the mounting cavity (110) and the ball plunger rod (300).

2. The dual-guide multi-layer combined sealing structure for a spraying machine according to claim 1, characterized in that: The mounting cavity (110) is arranged along the axis as through hole one (111), through hole two (112), and through hole three (113). The inner diameters of through hole one (111), through hole two (112), and through hole three (113) decrease in sequence. The plunger seat (200) is detachably fixed to through hole one (111). The inner wall is provided with an annular protrusion (201) for separating guide copper sleeve two (500) and combined retaining ring (700). The guide copper sleeve one (400) abuts against the lower wall surface of through hole two (112) and is fixed to it. The ball head plunger rod (300) is clearance-fitted with through hole three (113).

3. The dual-guide multi-layer combined sealing structure for a spraying machine according to claim 2, characterized in that: The plunger seat (200) is connected to the inner wall of the through hole (111) by a thread.

4. The dual-guide multi-layer combined sealing structure for a spraying machine according to claim 2, characterized in that: The plunger seat (200) has at least one annular mounting groove (202) on its outer wall surface. A sealing ring (1) is provided in the annular mounting groove (202), and the sealing ring (1) abuts against the inner wall of the through hole (111).

5. A dual-guided multi-layer combined sealing structure for a spraying machine according to claim 2, characterized in that: The outer wall of the multi-lip sealing ring (600) is provided with at least one annular mounting groove (601), and a sealing ring (2) is provided in the annular mounting groove (601), and the sealing ring (2) abuts against the inner wall of the through hole (112).

6. A dual-guided multi-layer combined sealing structure for a spraying machine according to any one of claims 1 to 5, characterized in that: There are two combined retaining ring components (700) near the plunger seat (200), and they are symmetrically arranged through the I-shaped sealing seat (800). The combined retaining ring component (700) includes a retaining ring (710) and a sealing ring three (720). The inner side wall of the retaining ring (710) abuts against the outer wall of the ball head plunger rod (300), and the outer side wall is provided with an installation curved surface (711) for mounting the sealing ring three (720). The installation curved surface (711) fits with the sealing ring three (720).

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