CN201103038Y

CN201103038Y - Leak-proof dust-proof oil sealing structure

Info

Publication number: CN201103038Y
Application number: CNU2007201765326U
Authority: CN
Inventors: 廖金旺; 林春祥
Original assignee: MINGJIANG RAY SEWING MACHINE CO Ltd
Current assignee: MINGJIANG RAY SEWING MACHINE CO Ltd
Priority date: 2007-09-19
Filing date: 2007-09-19
Publication date: 2008-08-20
Anticipated expiration: 2017-09-19

Abstract

The utility model relates to a leakage-proof and dustproof oil sealing structure which can achieve the effects of preventing oil from being leaked and being dustproof when a needle bar, a lower sprue puller and an annular gap needle stem driven by the needle bar are under reciprocating motion. The utility model can avoid the detachment of an oil seal due to the reciprocating motion of the needle bar or the annular gap needle stem of the traditional structure. The leakage-proof and dustproof oil sealing structure comprises a guiding piece and the oil seal. A driving pole with the reciprocating motion is arranged through the guiding piece and the oil seal, wherein, a containing space is arranged inside the guiding piece for containing the oil seal that is sealed with the driving pole. The leakage-proof and dustproof oil sealing structure can save cost and improve using effects by the technology.

Description

Leakproof anti-dust seal structure

Technical field

The utility model relates to a kind of leakproof anti-dust seal structure, relates in particular to the anti-leakage of oil and the dustproof structure of the drive rod that is used for Sewing machines.

Background technology

In general; Sewing machines all has the suture needle of drive or the drive rod of bearded needle; the back and forth movement that drive rod does not stop in the process of sewing; usually lubricating oil can be applied on the drive rod in order to motion smoothly; the process of adding at sewing can produce the chip of cloth or external dust unavoidably; these chips and dust enter by the slit between the structure easily and destroy structure; so for drive rod moves smoothly and does not destroy the structure of Sewing machines; on drive rod, install a kind of leakage of oil dustproof device of preventing additional; make the lubricating oil on drive rod can not flow out, external dust chip also is unlikely to enter inside configuration.

Seal construction as TaiWan, China patent announcement " I284715 " number, it comprises the ways and the driving shaft of containment member, tubular, this driving shaft is used for coaxial break-through ways, and carry out shift reciprocately at axis direction and drive, the sealing member has the sealing of the outer peripheral face elasticity butt of the basal part that is installed on this ways and interior perimembranous and driving shaft.

The sealing structure is that containment member is installed on the ways, form bearing surface in basal part and ways any, be used for the displacement of another axis direction in basal part and the ways is supported, construct according to conventional seals, this driving shaft leads by the ways of tubular, and press axis direction and driven by shift reciprocately ground, containment member utilizes basal part to be installed on the ways, and the interior perimembranous elasticity of sealing abuts on the outer peripheral face of this driving shaft, therefore driven by shift reciprocately by this driving shaft, strike off the lubricating oil or the particulate that are attached to this drive shaft surface.In basal part and ways, form bearing surface on another, be used for the displacement of another axis direction in basal part and the ways is supported that the bearing surface utilization prevents that at driving shaft and containment member generation sliding friction basal part from carrying out displacement to ways by axis direction.

In addition, sealing is configured in and forms the fitting projection that is used for forming bearing surface on any of basal part and ways, on another of basal part and ways, form again and be used for chimeric recess that fitting projection is embedded, its role is to make fitting projection to embed in the chimeric recess, ways is carried out displacement by axis direction to prevent basal part.

Seal construction from the above, abutting part can produce consume because of driving shaft moves repeatedly, generation can't with the situation of this driving shaft driving fit, when needing to change abutting part, then base seat must be changed together, this traditional seal construction is that clamping with fitting projection and chimeric recess is as being connected for basal part and ways again, and driving shaft also must move repeatedly, if the situation of basal part and ways disengaging takes place unavoidably with such connected mode, consider based on reality, should improve traditional seal construction and produce to avoid above situation.

Because above narration, it is as follows to conclude several shortcomings:

1. the abutting part of this traditional seal construction is not the cost that independent part causes saving replacing, causes unnecessary cost expenditure.

Because of this driving shaft must be repeatedly according to the axis direction motion, if basal part and ways be the mode that engage with chimeric recess with fitting projection as joint, the situation generation of basal part disengaging ways is arranged unavoidably.

The defective of the above conventional seals structure treats that suddenly relevant industry is improved.

The utility model content

The utility model provides a kind of leakproof anti-dust seal structure, and its main purpose is to save the cost of renewal part, and the improvement traditional structure easily has the defective of the phenomenon of getting loose.

For reaching above-mentioned purpose, the utility model provides a kind of leakproof anti-dust seal structure, make the circumferential weld shank of bearded needle under needle bar and the driving when reciprocating motion, can reach anti-leakage of oil and dustproof effect simultaneously, wherein this leakproof anti-dust seal structure comprises guide and oil sealing, be equipped with reciprocating drive rod in this guide and this oil sealing, wherein, this guide inside is provided with accommodation space, this oil sealing then is equipped in this accommodation space and with this drive rod and connects airtight, this oil sealing has ring wall and oil seal ring, be separated out between this ring wall and this oil seal ring and put oil groove, this oil sealing lower edge has dust ring, during this drive rod reciprocating motion, can prevent leakage of oil and the intrusion of dirt bits by this oil seal ring and this dust ring.

By technique scheme as can be known, the utility model has following advantage at least than traditional structure:

1. because oil sealing of the present utility model is an independent part, when consume, can change separately, need not to change this guide in the lump, and reach cost-effective purpose.

2. oil sealing of the present utility model is the interior and driving fit fully of accommodation space that is disposed at this guide, does not promptly have because of this drive rod moves repeatedly and causes the phenomenon of disengaging, and the situation of having avoided damaging takes place.

Description of drawings

Fig. 1 is the utility model leakproof anti-dust seal structure partial section decomposing schematic representation.

Fig. 2 is the utility model leakproof anti-dust seal structure partial section enlarged diagram.

Fig. 3 is another embodiment part section decomposing schematic representation of the utility model leakproof anti-dust seal structure.

Fig. 4 is the utility model leakproof anti-dust seal structure first embodiment schematic diagram.

Fig. 5 is the utility model leakproof anti-dust seal structure second embodiment schematic diagram.

The specific embodiment

The utility model leakproof anti-dust seal structure 10 is because of the defective of conventional seals structure, in structure connection configuration, improve to some extent, in order more to understand detailed structure of the present utility model, the structure connected mode of existing accompanying drawings the utility model leakproof anti-dust seal structure 10 is as follows:

See also Figure 1 and Figure 2, for the utility model leakproof anti-dust seal structure partial section decomposes, the part section enlarged diagram, this leakproof anti-dust seal structure 10 comprises guide 20 and oil sealing 30, be equipped with reciprocating drive rod 50 in guide 20 and the oil sealing 30, wherein guide 20 inside are provided with

accommodation space

21,30 on oil sealing is equipped in this accommodation space 21 and with drive rod 50 and connects airtight, oil sealing 30 has ring wall 31 and

oil seal ring

33,33 of ring wall 31 and oil seal rings are separated out puts oil groove 32, and oil sealing 30 lower edges have dust ring 34.

See also shown in another embodiment part section decomposing schematic representation of Fig. 3 the utility model leakproof anti-dust seal structure, the guide 20a of present embodiment is cylindric substantially, in the external diameter of accommodation space 21a periphery external diameter greater than other position of this guide 20a, and oil sealing 30 also is disposed in this accommodation space 21a, see also again shown in Fig. 1 the utility model leakproof anti-dust seal structure partial section decomposing schematic representation, when this drive rod 50 is arranged in this guide 20 and this oil sealing 30, these drive rod 50 outer walls come these oil sealing 30 expanded supports, engage closely with these drive rod 50 generations by this oil seal ring 33 and this dust ring 34, if this drive rod 50 when moving downward, is attached to lubricating oil on this drive rod 50 and will be struck off by this oil seal ring (33) and reside in this and put in the oil groove 32; When this drive rod (50) when moving upward, this dust ring 34 can stop external dust, damage structure to have avoided foreign matter to enter in this guide 20, and Fig. 4 and Fig. 5 are the utility model leakproof anti-dust seal structure first embodiment and the second embodiment schematic diagram, wherein the drive rod of Fig. 4 (50) is disposed at Sewing machines 40 for the needle bar 50a that can move up and down, the drive rod 50 of Fig. 5 is disposed at this Sewing machines 40 for the circumferential weld shank 50b that can seesaw, when this needle bar 50a and this circumferential weld shank 50b motion, this oil sealing 30 can with this needle bar 50a and this circumferential weld shank 50b driving fit, and then anti-leakage of oil of performance and dustproof effect.

The utility model leakproof anti-dust seal structure 10 has reached the technology of improving conventional seals structure defective really, for highlighting this novel advantage, now lists as follows:

Because oil sealing 30 of the present utility model is independent parts, when consume, can change separately, need not to change in the lump this guide 20 and reach cost-effective purpose.

Oil sealing 30 of the present utility model is the accommodation space 21 interior and driving fits fully that are disposed at this guide 20, promptly can not produce because of moving repeatedly of this drive rod 50 and cause the phenomenon of disengaging, and the situation of having avoided damaging takes place.

In sum, the utility model leakproof anti-dust seal structure 10 is promoted above-mentioned effect than the conventional seals structure, should fully meet the legal innovation patent important document of novelty and progressive, so file an application in accordance with the law.The utility model leakproof anti-dust seal structure 10 discloses as above with preferred embodiment; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; and a little variation and the modification done; all should be covered by in the utility model, therefore protection domain of the present utility model is with being as the criterion that claims were defined.

Claims

1. leakproof anti-dust seal structure, described leakproof anti-dust seal structure (10) comprise guide (20) and oil sealing (30), are equipped with reciprocating drive rod (50) in described guide (20) and the described oil sealing (30), it is characterized in that:

Described guide (20) inside is provided with accommodation space (21), and described oil sealing (30) is equipped in the described accommodation space (21) and with described drive rod (50) and connects airtight.

2. leakproof anti-dust seal structure according to claim 1 is characterized in that, described oil sealing (30) has ring wall (31) and oil seal ring (33), is separated out between described ring wall (31) and described oil seal ring (33) and puts oil groove (32).

3. leakproof anti-dust seal structure according to claim 1 is characterized in that, described oil sealing (30) lower edge has dust ring (34).

4. leakproof anti-dust seal structure according to claim 1 is characterized in that, the needle bar (50a) of described drive rod (50) for moving up and down.

5. leakproof anti-dust seal structure according to claim 1 is characterized in that, the circumferential weld shank (50b) of described drive rod (50) for seesawing.