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CN-122014853-A - Double-guide multilayer combined sealing structure for spraying machine

CN122014853ACN 122014853 ACN122014853 ACN 122014853ACN-122014853-A

Abstract

A double-guide multi-layer combined sealing structure for a spraying machine comprises a motor shell, wherein an installation cavity is formed in the motor shell, a plunger seat is fixedly arranged in the installation cavity, a ball head plunger rod capable of moving back and forth 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 respectively in sliding fit with the outer walls of two ends of the ball head plunger rod, the first guide copper sleeve is fixedly connected with the installation cavity, the second guide copper sleeve is fixedly connected with one end, far away from the first guide copper sleeve, of the plunger seat, a sealing assembly is arranged in an area formed by encircling the installation cavity and the ball head plunger rod and is positioned between the plunger seat and the first guide copper sleeve, and the sealing assembly comprises a multi-lip sealing ring and a combined retainer ring.

Inventors

  • LI XIAOPENG
  • YANG FAZHENG

Assignees

  • 浙江荣鹏气动工具股份有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (6)

  1. 1. The double-guide multi-layer combined sealing structure for the spraying machine is characterized by comprising a motor casing (100), wherein a mounting cavity (110) is formed in the motor casing (100), a plunger seat (200) is fixedly arranged in the mounting cavity (110), a ball plunger rod (300) capable of reciprocating along the axis of the plunger seat is arranged in the plunger seat (200), a first guide copper sleeve (400) and a second guide copper sleeve (500) are respectively in sliding fit with the outer walls of two ends of the ball plunger rod (300), the first guide copper sleeve (400) is fixedly connected with the mounting cavity (110), the second guide copper sleeve (500) is fixedly connected with one end, away from the first guide copper sleeve (400), of the plunger seat (200), the mounting cavity (110) is in a region formed by encircling the ball plunger rod (300), a sealing assembly is arranged between the plunger seat (200) and the first guide copper sleeve (400), the sealing assembly comprises a multi-lip sealing ring (600) and a combined retaining ring (700), the sealing lips of the multi-lip sealing ring (600) are in butt joint with the wall surface of the ball plunger rod (300), the back of the mounting cavity (110) and the sealing lips (600) are in butt joint with the axial direction, and the sealing lips of the at least two sealing lips (600) are respectively arranged between the two sealing lips (600).
  2. 2. The double-guide multi-layer combined sealing structure for the spraying machine according to claim 1, wherein the installation cavity (110) is sequentially provided with a first through hole (111), a second through hole (112) and a third through hole (113) along the axis, the inner diameters of the first through hole (111), the second through hole (112) and the third through hole (113) are sequentially reduced step by step, the plunger seat (200) is detachably fixedly connected with the first through hole (111), the inner wall of the plunger seat is provided with an annular bulge (201) for separating a second guide copper sleeve (500) and a combined retainer ring component (700), the first guide copper sleeve (400) is abutted against the lower wall surface of the second through hole (112) and fixedly connected with the lower wall surface of the second through hole, and the plunger rod (300) is in clearance fit with the third through hole (113).
  3. 3. The double-guide multi-layer combined sealing structure for the spraying machine according to claim 2, wherein the plunger seat (200) is connected with the inner wall of the first through hole (111) through threads.
  4. 4. The double-guide multi-layer combined sealing structure for the spraying machine according to claim 2, wherein at least one annular mounting groove I (202) is formed in the outer wall surface of the plunger seat (200), a sealing ring I (1) is arranged in the annular mounting groove I (202), and the sealing ring I (1) is abutted against the inner wall of the through hole I (111).
  5. 5. The double-guide multi-layer combined sealing structure for the spraying machine according to claim 2, wherein the outer wall surface of the multi-lip sealing ring (600) is provided with at least one annular mounting groove II (601), a sealing ring II (2) is arranged in the annular mounting groove II (601), and the sealing ring II (2) is abutted against the inner wall of the through hole II (112).
  6. 6. The double-guide multi-layer combined sealing structure for a spraying machine according to any one of claims 1-5, wherein two combined retainer ring elements (700) close to the plunger seat (200) are symmetrically arranged through the I-shaped sealing seat (800), the combined retainer ring elements (700) comprise retainer rings (710) and sealing rings III (720), the inner side walls of the retainer rings (710) are abutted with the outer wall surfaces of the ball plunger rod (300), the outer side walls of the retainer rings are provided with mounting curved surfaces (711) for clamping the sealing rings III (720), and the mounting curved surfaces (711) are matched with the sealing rings III (720).

Description

Double-guide multilayer combined sealing structure for spraying machine Technical Field The invention relates to a double-guide multilayer combined sealing structure for a spraying machine. Background In paint spraying operations, various applicators are being layered in an endless fashion in order to increase the efficiency of spraying and to reduce the labor intensity of workers. Wherein, the ball plunger rod is an important part of the spraying machine, and the performance of the ball plunger rod is directly related to the reliability and the spraying quality of the equipment. However, the ball plunger rod in the prior art is extremely easy to wear on the surface in the working state of long-term reciprocating motion, so that the sealing performance is obviously reduced, and therefore, the prior art is still in need of improvement and development. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a double-guide multi-layer combined sealing structure for a spraying machine. In order to achieve the above purpose, the invention provides a double-guide multi-layer combined sealing structure for a spraying machine, which comprises a motor shell, wherein an installation cavity is arranged in the motor shell, a plunger seat is fixedly arranged in the installation cavity, a ball head plunger rod capable of moving reciprocally 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 respectively and slidably matched with the outer walls of two ends of the ball head plunger rod, the first guide copper sleeve is fixedly connected with the installation cavity, the second guide copper sleeve is fixedly connected with one end of the plunger seat, which is far away from the first guide copper sleeve, a sealing assembly is arranged between the installation cavity and the first guide copper sleeve in an area formed by encircling the ball head plunger rod, the sealing assembly comprises a multi-lip sealing ring and a combined retainer ring, sealing lips of the multi-lip sealing ring are in butt joint with the wall surfaces of the ball head plunger rod, the back of the multi-lip sealing ring is in butt joint with the installation cavity, and the combined retainer ring is respectively and butt-jointed with the two sealing rings at least two ends of the multi-lip sealing ring in order to realize sealing between the installation cavity and the ball head. Further, the installation cavity is a first through hole, a second through hole and a third through hole in sequence along the axis, the inner diameters of the first through hole, the second through hole and the third through hole are reduced gradually in sequence, the plunger seat is detachably and fixedly connected with the first through hole, an annular bulge for separating the second guide copper sleeve from the combined retainer ring piece is arranged on the inner wall of the plunger seat, the first guide copper sleeve is propped against the lower wall surface of the second through hole and fixedly connected with the second guide copper sleeve, and the ball plunger rod is in clearance fit with the third through hole. Further, the plunger seat is connected with an inner wall of the through hole through threads. Further, at least one annular mounting groove I is formed in the outer wall surface of the plunger seat, a sealing ring I is arranged in the annular mounting groove I, and the sealing ring I is abutted to the inner wall of the through hole I. Further, at least one annular mounting groove II is formed in the outer wall surface of the multi-lip sealing ring, a sealing ring II is arranged in the annular mounting groove II, and the sealing ring II is abutted to the inner wall of the through hole II. Further, two combined check ring pieces close to the plunger seat are symmetrically arranged through the I-shaped sealing seat, each combined check ring piece comprises a check ring and a first sealing ring, the inner side wall of the check ring is abutted to the outer wall surface of the plunger rod of the ball head, the outer side wall of the check ring is provided with a mounting curved surface for clamping the first sealing ring, and the mounting curved surface is matched with the first sealing ring. Compared with the prior art, the ball plunger rod has the advantages that the first guide copper sleeve and the second guide copper sleeve are respectively arranged at the two ends of the ball plunger rod, straightness of the ball plunger rod in axial movement is greatly guaranteed, the reduction of the service life of the sealing ring caused by deflection is avoided, meanwhile, the multi-lip sealing ring is matched with the combined retainer ring piece, the wear resistance is realized, the sealing layers are large, and the sealing service life is greatly prolonged. Drawings FIG. 1 is a cross-sectional view of a dual guide multi-layer composite seal st