CN2575352Y

CN2575352Y - Energy-saving expansion screw bolt

Info

Publication number: CN2575352Y
Application number: CN 02282109
Authority: CN
Inventors: 蔡盛忠; 江信明
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-29
Filing date: 2002-10-29
Publication date: 2003-09-24
Anticipated expiration: 2012-10-29

Abstract

The utility model relates to an extension rod with variable pitch, which comprises a sleeve provided with a first end, a second end, and a combined hole which is penetrated to both ends, a sliding rod which is inserted in the combined hole from the second end of the sleeve, and can generate relative slide with the sleeve, a positioning device arranged on the second end of the sleeve for limiting the sliding rod to slide corresponding to the sleeve. Thus, when the sliding rod slides corresponding to the sleeve, the sliding rod is positioned at an axial extension position by the limitation of the positioning device, and can not disengage from the sleeve. Thus, the first end of the sleeve is fixedly clamped with screw heads with different length.

Description

The displacement extension bar

Technical field

The utility model relates to a kind of extension bar, particularly a kind of displacement extension bar.

Background technique

The development of taking off along with science and technology, to be the society of a diversification future, yet we can be found to everywhere, the structural form of society makes rapid progress, the required quality of the life of people improves relatively, and the requirement of things also from the old thinking of ' can with all right ', is become quite fine and smooth, have the conception of continuous progress or innovation only, could satisfy the demand of modern society.

Taiwan patent announcement the 478443rd discloses the cover fixing structure of the moving extension bar of a kind of spiral shell, comprise an extension bar main body, this extension bar main body one end is provided with a cover and chooses a place to give a banquet, be to be nested with wherein for a screw head, and establish and overlap solid by at least one product card of pulling, the product and cooperate a sliding set and this is pulled, one elastomer and two clasps, and can be the action that flexible card is established, though this case has the effect of firm socket screw head, the hexagonal driveshaft that the thought extension bar main body the other end sets firmly is a solid form, and extension bar main body slippage relatively, therefore, if the screw head of the sheathed different shape of extension bar main body all is different for fear of each screw head in length, each screw head is different with the position that the product card of pulling is established, so connect limited following in space in sheathed cover for seat, and can't be applicable to multiple screw head, cause the inconvenience in the work, must additionally buy many connecting rods and just can meet work requirements and increase the user, so this case still has the space of improvement.

Summary of the invention

The purpose of this utility model provides a kind of displacement extension bar, includes: a sleeve is to have first end and second end, and the joining hole that runs through two ends; One sliding bar is to insert joining hole by sleeve second end, and can produces slide relative with sleeve; One location device is arranged on sleeve second end, slides in order to place restrictions on the relative sleeve of sliding bar; By this, when the relative sleeve of sliding bar slides, and place restrictions on by positioning device and to be positioned to extend axially the position, and can't break away from this sleeve, can make sleeve first end fix the screw head of different length size.

The utility model is elaborated with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the utility model stereo appearance figure;

Fig. 2 is the utility model three-dimensional system diagram;

Fig. 3 is the utility model sectional view, shows that sliding bar is accommodated in sleeve;

Fig. 4 is the relative sleeve sliding mode of the utility model sliding bar figure;

Fig. 5 is the utility model sectional view, and the demonstration sliding bar is pulled out in sleeve;

Fig. 6 is one of phase diagram of the utility model sleeve socket screw head;

Fig. 7 be the utility model sleeve socket screw head phase diagram two;

Fig. 8 is another embodiment of the utility model.

Drawing reference numeral explanation: 10 sleeves; 11 joining holes; 12 concave ring grooves; 121 hole of beads; 13 concave ring grooves; 131 hole of beads; 132 circular grooves; 133 circular grooves; 134 jacks; 14 retaining rings; 141 perforation; 15 steel balls; 20 sliding bars; 21 positioning grooves; 211 first; 212 second; 22 shrinkage pools; 23 magnetics; 30 positioning devices; 31 sliding sleeves; 311 are nested with the space; 312 stop edges; 32 springs; 33 steel balls; 33a elasticity button; 331a holds pin; 34C shape button; 40 screw heads; 50 screw heads.

Embodiment

Fig. 1 to Fig. 8 shows several selected embodiments of the utility model structure, and only for the usefulness of explanation, the utility model is not subjected to the restriction of this structure for this.

Please consult Fig. 1 earlier, the utility model figure thus can roughly be seen it, and the utility model mainly includes:

One sleeve 10, have first end and second end, and the hexagon joining hole 11 that runs through two ends, be provided with a concave ring groove 12 in first end, this concave ring groove 12 has a hole of bead 121 and is communicated in joining hole 11, and second end also has a concave ring groove 13, and has a hole of bead 131 and be communicated in joining hole 11, and these concave ring groove 13 front ends are provided with a circular groove 132;

One retaining ring 14 has a perforation 141, makes steel ball 15 be placed in the hole of bead 121 and is sheathed on concave ring groove 12, place restrictions on steel ball 15 and deviate from this hole of bead 121, and these steel ball 15 dimplings is exposed to joining hole 11;

One sliding bar 20, be the hexagonal column, and having first end and second end, first end can join with sleeve barrel tool or other fastening means, and establishes several positioning grooves 21 on sliding bar 20 peripheries, those positioning grooves 21 are into V font indentations, and have first 211 and second 212 that are predetermined angle correspondence, and sliding bar 20 is provided with a shrinkage pool 22 at second end, and can be embedded a magnetic 23, this sliding bar 20 can be slidedly arranged in the joining hole 11 of this sleeve 10, and can not produce relative rotation;

One location device 30, comprise a sliding sleeve 31, these sliding sleeve 31 central authorities are arranged with one and are nested with space 311, and be equipped with a stop edge 312 in the space 311 with being nested with, one spring 32 is placed in and is nested with in the space 311, and one end be connected to stop edge 312, one steel ball 33 is placed in the hole of bead 131, make sliding sleeve 31 and spring 32 be sheathed on the concave ring groove 13 of sleeve 10, and be embedded at circular groove 132 with C shape button 34, make sliding sleeve 31 place restrictions on steel ball 33 and break away from, and the stop edge 312 of sliding sleeve 31 is spacing for 34 backstops of C shape button, and make sliding sleeve 31 can't deviate from sleeve 10 second ends;

And as shown in Figure 3, be accommodated in for sliding bar 20 in the joining hole 11 of sleeve 10, and sliding sleeve 31 is when operating position not, the stop edge 312 compacting steel balls 33 of sliding sleeve 31, and steel ball 33 is absorbed in the initial positioning groove 21 of sliding bar 20 contiguous first ends, and be equipped in first 211 and second 212, and making sliding bar 20 sleeve 10 slippages and going out relatively, this moment, joining hole 11 axial spaces be minimum;

And as shown in Figure 4, when operating sliding sleeve 31 with respect to sleeve 10 slippages, sliding sleeve 31 stop edges 312 force spring 32 compressions, and make stop edge 312 no longer compress this steel ball 33, and make sliding bar 20 in the time of sleeve 10 second end slippages, steel ball 33 is able in those positioning grooves 21, with first 211, second 212 generation slippages, and make sliding bar 20 can pull out sleeve 10 smoothly, and be away from sleeve 10 first ends, and joining hole 11 axial spaces are slowly enlarged;

And as shown in Figure 5, for sliding bar 20 relative sleeves 10 slide onto extreme length, in external force when sliding sleeve 31 is removed, by spring 32 sliding sleeve 31 is pushed into and resets, make the stop edge 312 of sliding sleeve 31 suppress steel ball 33 once more, and steel ball 33 is absorbed in sliding bar 20 is close to the most last positioning groove 21 of second ends, again form the blocking forms with first 211, second 212, make sliding bar 20 sleeve 10 slippages relatively, this moment, joining hole 11 axial spaces were maximum;

Therefore, the utility model can be consulted as shown in Figure 6 by aforesaid operations action and structural form, when screw head 40 length more in short-term, can directly be sheathed on first end of sleeve 10, and be positioned the hexagon prism position of screw head 40 by magnetic 23 absorption and steel ball 15 blockings;

And as shown in Figure 7, when screw head 50 is a different shape, be that screw head 50 is the double end form, and hexagon prism is comparatively in middle section position, so can adjust the axial position of sliding bar 20 earlier with respect to sleeve 10, to increase joining hole 11 axial spaces, and utilize positioning device 30 optionally to be equipped on the intended orientation ditch 21 of sliding bar 20, insert the position of sleeve 10 first ends to be suitable for screw head 50 ends, therefore, the utility model by sliding bar 20 relatively sleeve 10 adjust axial distances, and can be suitable for different shape, the screw head 40 of size, 50, have excellent practicability.

As shown in Figure 8, be located steel ball 33 cancellations of device 30, and the elasticity button 33a that changes with a C shape replaces, and this elasticity button 33a one end is bent to form an end pin 331a, make elasticity button 33a be embedded at the circular groove 133 of the concave ring groove 13 of sleeve 10, and the jack 134 that its end pin 331a then is inserted in concave ring groove 13 forms the location, and can provide the relative sleeves 10 of sliding bar 20 to slide the time, the end pin 331a of elasticity button 33a optionally is arranged on the positioning groove 21 of sliding bar 20, and same has an above-mentioned identical effect.

Can summarize with regard to the above and the utlity model has following advantage:

1. ' displacement extension bar ' of the present utility model, when the relative sleeve of its sliding bar slides, can place restrictions on by positioning device and be positioned to extend axially the position, the axial space with selectivity expansion joining hole makes sleeve first end can fix the screw head of different length size.

2. ' displacement extension bar ' of the present utility model, be provided with several positioning grooves by sliding bar, set and be positioned at appropriate location and can provide the steel ball of positioning device or elasticity to buckle the selectivity card, and make sliding bar extend slip in sleeve adjustment type ground relatively, and make sleeve first end during to screw head, all can obtain firm locating effect, and can provide the user to need not to buy again many connecting rods in socket length difference, just can reach the screw head that is suitable for the different length size, have excellent practicability.

The above only is preferred embodiment of the present utility model, can not be used for limiting the scope that the utility model is implemented, and all equalizations of doing according to the spirit of the utility model application change and modify, and all should still belong within the utility model protection domain.

Claims

1. displacement extension bar is characterized in that comprising:

One sleeve has first end and second end, and the joining hole that runs through two ends;

One sliding bar is to insert joining hole from sleeve second end, and can produces slide relative with sleeve;

One location device is arranged on sleeve second end, slides in order to place restrictions on the relative sleeve of sliding bar;

Wherein, when the relative sleeve of sliding bar slides, place restrictions on to be positioned to extend axially the position by positioning device, and can't break away from this sleeve, make sleeve first end fix the screw head of different length size.

2. displacement extension bar as claimed in claim 1 is characterized in that, sleeve first end has concave ring groove, and concave ring groove is provided with a hole of bead holding steel ball, and by the Fixing shrink ring position of limiting.

3. displacement extension bar as claimed in claim 1 is characterized in that, sliding bar has first end and second end, and first end can join with sleeve barrel tool, and second end then is embedded with magnetic.

4. displacement extension bar as claimed in claim 1 is characterized in that the sliding bar periphery is provided with several positioning grooves, makes positioning device selectivity card set the position.

5. displacement extension bar as claimed in claim 1, it is characterized in that, sleeve second end has concave ring groove, concave ring groove is provided with a hole of bead to hold steel ball, and positioning device comprises a sliding sleeve, this sliding sleeve is provided with one and is nested with the space, and a spring is placed in and is nested with in the space, makes sliding sleeve and spring housing be located at the concave ring groove of sleeve.

6. displacement extension bar as claimed in claim 1, it is characterized in that, sleeve second end has concave ring groove, concave ring groove is provided with a circular groove to hold an elasticity button, and positioning device comprises a sliding sleeve, this sliding sleeve is provided with one and is nested with the space, and a spring is placed in and is nested with in the space, makes sliding sleeve and spring housing be located at the concave ring groove of sleeve.

7. as claim 5 or 6 described displacement extension bars, it is characterized in that being nested with of sliding sleeve is equipped with a stop edge in the space.

8. displacement extension bar as claimed in claim 4 is characterized in that these positioning grooves have first and second of V-shaped angle.