CN208595143U - Power tool transmission shaft - Google Patents

Abstract

A kind of power tool transmission shaft is respectively formed driving end and working tips including the opposite end in shaft body, and is shaped in the liner part in shaft body and being located between driving end and working tips.Transmission shaft replaces using liner part as the rock-steady structure combined with power tool and improves the missing for using that bearing hides increase cost payout and bearing damage as rock-steady structure and assembly is not easy.

Description

Power tool transmission shaft

Technical field

The utility model is related with power tool, particularly relates to a kind of power tool transmission shaft.

Background technique

The end of power output is arranged in the transmission shaft of known power tools, to execute the driving work package of the task, It allows an operator to carry out scheduled work in a manner of lighter and is quick accordingly, foregoing work part such as bolt or nut Equal objects.

TaiWan, China bulletin M545678 new patent discloses transmission shaft used in a kind of pneumatic tool, aforementioned drive The both ends of axis are respectively working tips and driving end, and wherein working tips are used to combine work package, and driving end then bears to come From the active force of the hammering group inside pneumatic tool, so that transmission shaft can rotate and work package is driven to rotate.Aforementioned drive axis Driving end include two drive blocks radially projecting from shaft body surface, the drive block is subject to from hammering group Impact force, separately for stable drive axis, aforementioned patent technology is arranged a bearing, bearing surface contacts in the outside of transmission shaft A hole wall inside pneumatic tool, and bearing is resisted against on drive block and establishes installation site, and ensures that transmission shaft can accordingly Smooth rotation.In other known similar means, bearing is often set in outside transmission shaft with the position of stable drive axis, However, not only increasing cost payout using bearing, and also there is the derived assembling of build-up tolerance between bearing and transmission shaft and be not easy The problem of, notably, if bearing damage Shi Zeyou changes the puzzlement being not easy.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of power tool transmission shaft, it is convenient for assembly, and can Reduce cost payout.

For edge to reach above-mentioned purpose, it includes a shaft body, the axis that the utility model, which provides a kind of power tool transmission shaft, The opposite end of ontology is respectively a driving end and a working tips, and wherein the driving end is inserted in the one of the power tool In chamber, and including at least one drive block radially projecting from the shaft body surface, which exposes to the power Outside tool；Separately there is a liner part to be formed along the circumferential surface one protrusion of the shaft body, which is located in the chamber and the lining Set portion has a first external diameter, which has a second external diameter, and wherein the first external diameter is greater than the second external diameter.

In one embodiment, have an at least chase along the recessed formation of circumferential surface of the liner part in liner part.

In one embodiment, the quantity of drive block is two and is located at the opposite sides of the shaft body, two drive block and position It is online in the same radial direction of the axis perpendicular through the shaft body.

In one embodiment, two drive block this it is radial there is a maximum distance online, the maximum distance be less than this One outer diameter but be greater than the second external diameter.

In one embodiment, liner part has an opposite facing first end face and a second end face, at least one driving Block is along the axial setting of the shaft body and one end connects the first end face.

In one embodiment, shaft body has an annular groove along the recessed formation of circumferential surface of the shaft body, and the annular groove is neighbouring should Second end face.

The effect of the utility model is that transmission shaft is integrally formed, and is suitable for quick and mass production, the bushing of transmission shaft Portion replaces bearing that can reduce cost payout.

Detailed description of the invention

Fig. 1 is the perspective view of the power tool transmission shaft of one preferred embodiment of the utility model；

Fig. 2 is another angle perspective view of transmission shaft shown in Fig. 1；

Fig. 3 is the side view of transmission shaft shown in Fig. 1；

Fig. 4 is the top view of transmission shaft shown in Fig. 1；

Fig. 5 is the right side view of transmission shaft shown in Fig. 1；

Fig. 6 is the 6-6 sectional view of Fig. 1；

Fig. 7 is the schematic diagram of transmission shaft and power tool shown in Fig. 1.

[symbol description]

100 transmission shafts

10 shaft body 10a annular grooves

12 driving end 12a drive blocks

14 working tips

16 liner part 16a first end faces

16b second end face 16c chase

Bis- drive block of D is in radial online maximum distance

D1 first external diameter

D2 second external diameter

L1 axis

L2 radial line

S chamber

Specific embodiment

To be illustrated more clearly that the utility model, names a preferred embodiment and cooperate attached drawing detailed description is as follows. It please join shown in Fig. 1 to Fig. 7, be the power tool transmission shaft 100 of one preferred embodiment of the utility model, the power tool example Such as, but not limited to, pneumatic tool, and in the present embodiment then by taking the pneumatic tool with hammer structure as an example.

Transmission shaft 100 has the elongated shaft body 10 of round bar shape, and two opposite ends of shaft body 10 axially are respectively to drive Moved end portion 12 and working tips 14, wherein driving end 12 be combined in chamber S for being plugged in the one of pneumatic tool so that Transmission shaft 100 can drive rotation by the hammering group (not shown) of pneumatic tool, since hammering group is known technology, no longer in this It repeats；Working tips 14 then expose to outside pneumatic tool, can also for combining work package, such as the objects such as bolt or nut By combining sleeve to combine again with other objects.

The driving end 12 of the present embodiment includes two drive block 12as radially projecting from 10 surface of shaft body, this two Drive block 12a is symmetrically located at the left and right sides of shaft body 10, specifically, two drive block 12a is position perpendicular through axis On the same radial line L2 of the axis L1 of ontology 10, so that the two drive blocks 12a has a maximum distance D on radial line L2, Aforementioned drive block 12a is subject to the impact force from hammering group.

Transmission shaft 100 is between driving end 12 and working tips 14 more integrally formed with a liner part 16, liner part 16 Be biased against driving end 12, and liner part 16 be along shaft body 10 circumferential surface protrusion and form ring structure person.Liner part 16 has There are opposite facing first end face 16a and a second end face 16b, wherein first end face 16a is to be arranged along shaft body 10 is axial Two drive block 12a one end connection, an annular groove 10a, annular groove 10a is then being arranged at neighbouring second end face 16b in shaft body 10 It is formed along the circumferential surface of shaft body 10 is recessed.

Please cooperate Fig. 3, liner part 16 has a first external diameter D1, and shaft body 10 has a second external diameter D2, wherein this One outer diameter D 1 is greater than second external diameter D2, therefore works as transmission shaft 100 in conjunction with pneumatic tool, and liner part 16 is located at chamber S When interior, the outer ring face contact chamber S inner wall of liner part 16, so that transmission shaft 100 steadily combines pneumatic tool.In addition, above-mentioned Maximum distance D and the relationship of first external diameter D1 and second external diameter D2 between two drive block 12a are: first external diameter D1 > maximum away from From D > second external diameter D2, so can ensure that transmission shaft 100 steadily in conjunction with pneumatic tool, meanwhile, drive block 12a can have compared with Large volume bears the impact force action from hammering group.

In addition, an at least chase 16c is selectively arranged in the liner part 16 of shaft body 10, chase 16c is along liner part The recessed formation of 16 circumferential surface.

The transmission shaft 100 of above-mentioned power tool adopts integrated molding and is made, and is suitable for rapid processing and mass production.It passes Moving axis 100 and using liner part 16 as the rock-steady structure combined with power tool, replaces and improves bearing for a long time It is set on transmission shaft and hides bearing damage or assemble the missing being not easy, more can reduce cost branch because of the configuration of bearing-free Out.As for the chase 16c that 16 outer ring surface of liner part is arranged in, then make transmission shaft 100 combined with power tool between lubrication Oil has overflow volume appropriate, to ensure that transmission shaft 100 can be turned swimmingly, in addition, in order to avoid shaft body 10 is close The position of liner part 16 causes subsequent assembling uncertain because outer diameter attrition process is difficult, so annular groove 10a is applied, through ring Slot 10a is from the recessed formation in 10 surface of shaft body, to ensure subsequent assembling really and smoothly.

It is noted that when transmission shaft 100 is applied to the pneumatic tool with hammer structure, because of transmission shaft 100 Not by turn at a high speed, therefore when the outer ring face contact chamber S inner wall of its liner part 16, does not have undue wear and ask Topic.

The foregoing is merely the preferable possible embodiments of the utility model, all application the utility model specifications and right Equivalence changes carried out by claim ought to be included in the scope of the patents of the utility model.

Claims (6)

1. a kind of power tool transmission shaft, including a shaft body, the opposite end of the shaft body be respectively a driving end with One working tips, wherein the driving end is inserted in a chamber of the power tool, and including at least one from the shaft body The radially projecting drive block in surface, the working tips expose to outside the power tool；It is characterized by:

It is formed including a liner part along the circumferential surface one protrusion of the shaft body, which is located in the chamber and the liner part With a first external diameter, which has a second external diameter, and wherein the first external diameter is greater than the second external diameter.

2. power tool transmission shaft as described in claim 1 wherein has an at least chase along the lining in the liner part The recessed formation of the circumferential surface in set portion.

3. power tool transmission shaft as claimed in claim 1 or 2, wherein the quantity of the drive block is two and is located at the axis sheet The opposite sides of body, two drive block are simultaneously online positioned at the same radial direction of the axis perpendicular through the shaft body.

4. power tool transmission shaft as claimed in claim 3, wherein two drive block is radial maximum with one online at this Distance, the maximum distance are less than the first external diameter but are greater than the second external diameter.

5. power tool transmission shaft as claimed in claim 1 or 2, wherein the liner part has an opposite facing first end face With a second end face, at least one drive block is along the axial setting of the shaft body and one end connects the first end face.

6. power tool transmission shaft as claimed in claim 5, wherein the shaft body has an annular groove along the shaft body The recessed formation of circumferential surface, the annular groove is adjacent to the second end face.