CN201896239U

CN201896239U - Member bar sealing structure of sewing machine

Info

Publication number: CN201896239U
Application number: CN2010205645734U
Authority: CN
Inventors: 邱卫明; 徐永明; 赵林蔚; 阮积祥
Original assignee: New Jack Sewing Machine Co Ltd
Current assignee: Jack Sewing Machine Co Ltd
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-07-13
Anticipated expiration: 2020-10-15

Abstract

The utility model belongs to the technical field of sewing machines, and relates to a member bar sealing structure of a sewing machine. A member bar sleeve is slidably sleeved on a member bar, an annular groove is disposed on the outer surface of one side of the member bar sleeve, one end of an oil seal is sleeved on the member bar and hermetically matches with the member bar, the other end of the oil seal is sleeved on one side, which is provided with the annular groove, of the sleeve and covers the annular groove, an annular clamp groove is disposed on an outer cylindrical surface of the oil seal which corresponds to the annular groove on the member bar sleeve, and a spring coil is clamped on the annular clamp groove, so that the oil seal hermetically matches with the member bar sleeve. The member bar sealing structure has the advantages that pressure of the oil seal to the member bar is high, sealing effect is fine, contact area between the oil seal and the member bar is small, movement resistance is low, and accordingly the member bar sealing structure is suitable to be utilized as a sealing structure on various sewing machines and member bars with identical structures.

Description

The rod member hermetically-sealed construction of Sewing machines

Technical field

The utility model belongs to the sewing machine technique field, refers in particular to a kind of rod member hermetically-sealed construction of Sewing machines.

Background technology

At present, the rod member sealing device of general Sewing machines is between the rod member sleeve that rod member cooperates with rod member sealing ring to be set, to prevent that to be the lubricated lubricating oil of rod member leak out from the cooperation place of rod member outer wall and rod member, its objective is the elimination oil leakage phenomenon, still because the structure of existing sealing device and be provided with reasonable inadequately, cause oil leakage phenomenon not eliminate, pollute the clothing in other parts and the sewing, leakage of oil is excessive even cause lubrication failure, reduces the service life of Sewing machines part accessory.

Summary of the invention

The purpose of this utility model provide a kind of good sealing effect, to the rod member hermetically-sealed construction of the little Sewing machines of the rod member resistance of motion.

The purpose of this utility model is achieved in that

The rod member hermetically-sealed construction of Sewing machines, be that slip cap is equipped with the rod member sleeve on rod member, the outer surface of rod member sleeve one side is provided with cannelure, one headgear of oil sealing is contained on the rod member and with rod member and is sealed and matched, the other end is sleeved on the side that cannelure is arranged on the sleeve and cover cannelure, be provided with annular slot with the outer surface of the oil sealing of cannelure corresponding section on the rod member sleeve, on annular slot, be installed with turn, make oil sealing cooperate with the rod member sleeve seal.

The internal diameter of the internal diameter＞bottom on the internal diameter＞top among the above-mentioned oil sealing, the bottom inner cylinder face of oil sealing are provided with above together cannelure, and then form the above oil seal ring of two circles, and the section of described oil seal ring is trapezoidal dentation.

Cannelure on the above-mentioned oil sealing has twice, and then forms three circle oil seal rings.

The outer surface at above-mentioned oil sealing middle part is provided with cannelure.

Above-mentioned rod member is the slide bar of sewing machine needle bar or Sewing machines, and described rod member sleeve is that sewing machine needle bar is trapped or the jack rod sleeve of Sewing machines.

The outstanding compared to existing technology advantage of the utility model is:

1, good sealing effect of the present utility model: because the utility model adopts multiple tracks oil seal ring 67 to seal, 61 pairs of oil seal rings 67 of wall have bigger elastic restoring force outside the oil seal ring 67, oil seal ring 67 inner cylinder faces are big to the pressure of rod member (for example shank 2, slide bar 95), good sealing effect.

2, the resistance of motion of 6 pairs of rod members of oil sealing of the present utility model is little: owing to adopt the oil seal ring 67 of trapezoidal dentation to seal oil sealing, contact area between oil seal ring 67 inner cylinder faces and the rod member is little, whole frictional resistance is little, thereby the resistance of motion of 6 pairs of rod members of oil sealing is little.

3, the utility model is applicable to that making hermetically-sealed construction on multiple Sewing machines such as overlock machine, flat seam machine and identical rod member uses.

Description of drawings

Fig. 1 is the exploded perspective schematic diagram of the utility model embodiment 1.

Fig. 2 is the front view of oil sealing of the present utility model.

Fig. 3 is that A-A of Fig. 2 is to cutaway view.

Fig. 4 is the front view of the shank of the utility model embodiment 1.

Fig. 5 is the shank of the utility model embodiment 1 and the mated condition cutaway view of oil sealing and turn.

Fig. 6 is the decomposing state stereogram of the utility model embodiment 2.

Fig. 7 is the confined state stereogram of the utility model embodiment 2.

The specific embodiment

The utility model is further described with specific embodiment below in conjunction with accompanying drawing:

Embodiment 1, referring to Fig. 1-5:

The rod member hermetically-sealed construction of Sewing machines, be in the front portion of casing 1 shank 2(to be installed to be equivalent to rod member), shank 2 stretches out outside the casing 1, the top of the shank 2 in the casing 1 is set with overlaps 4 on the shank, the bottom is set with needle bar lower bushing 5(and is equivalent to the rod member sleeve), cover 4 is fixed on the upper wall of casing 1 on the shank, be provided with sealing ring 3 between cover 4 and the casing 1 on the shank, so that shank 2 is sealed, needle bar lower bushing 5 is fixed on the lower wall of casing 1 and stretches out outside the lower wall of casing 1, the outer surface of needle bar lower bushing 5 bottoms is provided with cannelure 51(and is equivalent to cannelure of the present utility model), one headgear of oil sealing 6 is contained on the shank 2 outside the lower wall that stretches out casing 1 and with shank 2 and is sealed and matched, the other end is sleeved on the needle bar lower bushing 5 outside the lower wall that stretches out casing 1 and covers cannelure 51, be provided with annular slot 64 with the outer surface of the oil sealing 6 of cannelure 51 corresponding sections on the needle bar lower bushing 5, on annular slot 64, be installed with turn 7, make oil sealing 6 and needle bar lower bushing 5 be sealed and matched.

The inner diameter d 1 of the inner diameter d 2＞bottom 61 on inner diameter d 3＞top 63 of 62 among the above-mentioned oil sealing 6, the bottom inner cylinder face of oil sealing 6 is provided with above together cannelure 67, and then forming the above oil seal ring 67 of two circles, the section of described oil seal ring 67 is trapezoidal dentation.

Cannelure 66 on the above-mentioned oil sealing 6 has twice, and then forms three circle oil seal rings 67.

The outer surface at above-mentioned oil sealing 6 middle parts is provided with cannelure 65.

Embodiment 2, referring to Fig. 6-7 and Fig. 3:

Present embodiment 2 is basic identical with the hermetically-sealed construction of embodiment 1, the sliding rod frame 91 of embodiment 2 is equivalent to the casing of embodiment 1, slide bar 95(is a rod member of the present utility model) be equivalent to the shank of embodiment 1, jack rod sleeve 92(is a rod member sleeve of the present utility model) be equivalent to the needle bar lower bushing of embodiment 1, oil sealing and turn are identical with the structure of embodiment 1, one side of jack rod sleeve 92 is fixed on a side of sliding rod frame 91, the outer surface of opposite side is provided with cannelure 921(and is equivalent to cannelure of the present utility model), the end that the internal diameter of oil sealing 6 is little is sleeved on the slide bar 95, make oil sealing 6 and slide bar 95 be sealed and matched, the other end is sleeved on the jack rod sleeve 92 and covers cannelure 921 on the jack rod sleeve 92, be installed with turn 7 on the annular slot of oil sealing 6 outer surfaces, make oil sealing 6 and jack rod sleeve 92 be sealed and matched.

Hermetically-sealed construction of the present utility model also can be used for cover and the sealing of shank or the sealing of other analog structure on the sewing machine needle bar.

The foregoing description is preferred embodiment of the present utility model only, is not to limit protection domain of the present utility model according to this, so: all equivalences of doing according to structure of the present utility model, shape, principle change, and all should be covered by within the protection domain of the present utility model.

Claims

1. the rod member hermetically-sealed construction of Sewing machines, be that slip cap is equipped with the rod member sleeve on rod member, it is characterized in that: the outer surface of rod member sleeve one side is provided with cannelure, one headgear of oil sealing is contained on the rod member and with rod member and is sealed and matched, the other end is sleeved on the side that cannelure is arranged on the sleeve and cover cannelure, be provided with annular slot with the outer surface of the oil sealing of cannelure corresponding section on the rod member sleeve, on annular slot, be installed with turn, make oil sealing cooperate with the rod member sleeve seal.

2. the rod member hermetically-sealed construction of Sewing machines according to claim 1, it is characterized in that: the internal diameter of the internal diameter＞bottom on the internal diameter＞top among the described oil sealing, the bottom inner cylinder face of oil sealing is provided with above together cannelure, and then forming the above oil seal ring of two circles, the section of described oil seal ring is trapezoidal dentation.

3. the rod member hermetically-sealed construction of Sewing machines according to claim 2 is characterized in that: the cannelure on the described oil sealing has twice, and then forms three circle oil seal rings.

4. the rod member hermetically-sealed construction of Sewing machines according to claim 2 is characterized in that: the outer surface at described oil sealing middle part is provided with cannelure.

5. according to the rod member hermetically-sealed construction of each described Sewing machines of claim 1-4, it is characterized in that: described rod member is the slide bar of sewing machine needle bar or Sewing machines, and described rod member sleeve is that sewing machine needle bar is trapped or the jack rod sleeve of Sewing machines.