DE202010008300U1 - Telescopic precision ratchet screwdriver - Google Patents

Abstract

Telescopic precision ratchet screwdriver comprising
a base body (1) which has a receiving space (11) and a through hole (12), wherein a positioning unit is accommodated in the receiving space (11), and wherein the base body (1) forms a latching part (19) on the underside,
a first sleeve (19) enclosing the base body (1),
a first gear rod (3) which is guided through the through hole (12) of the base body (1) and a blind hole (31) and a first and second end, wherein at the first end a rack (32) is provided, which with a Sprocket (33) is engaged, the teeth (34) which can be locked by the pawls (15) of the positioning unit, and wherein at the second end of the first gear rod (3) a first engagement member (35) is provided
a second sleeve (4) which has a latching recess (41) into which the latching part (19) of the base body (1) engages,
a second gear rod (5) passing through the latching recess (41) of the second ...

Description

The The invention relates to a screwdriver, in particular a telescopic precise ratchet screwdriver.

Out TW 586472 from 01.05.2004 a precise screwdriver is known comprising a sleeve; a screwdriver blade which is slid into the sleeve and has a bore in which a magnetic element is arranged, which divides the bore into two areas; a magnetic member disposed in the center of the bore of the screwdriver blade; and two screwdriver heads, which have a knitting head at one end or at both ends and can be inserted into the bore, wherein the inserted screwdriver head are attracted by the magnetic element and can not fall out. When a screwdriver head is inserted, the other screwdriver head is hidden in the screwdriver blade. If the other screwdriver head is needed, it can be removed from the screwdriver blade and inserted into the bore of the screwdriver blade. Therefore, an exchange of two screwdriver heads is possible.

at This screwdriver has only two screwdriver heads to disposal. In addition, the length of the screwdriver heads unchangeable, allowing a length adjustment according to the application space is not possible.

Of the precise screwdriver rarely has a ratchet function, because the precise screwdriver is usually used for Turning small screws is used. When using can through the Ratchet a reverse torque can be generated, leaving the screw can not be tightened reliably.

Of the Invention is based on the object, a telescopic precise Ratchet screwdriver to overcome the disadvantages of the conventional solution can.

These Task is by the telescopic invention precise ratchet screwdriver solved, comprising a main body having a receiving space and a through hole having received a positioning in the receiving space is, and wherein the base body on the underside of a locking part ausformt; a first sleeve, which is the main body surrounds; a first gear rod passing through the through hole the base body is guided and a blind hole and a first and second end, wherein at the first end a rack is provided which engages with a ring gear stands, who has teeth, the pawls of the Positioning unit can be locked, and where on second end of the first gear rod, a first engagement element is provided; a second sleeve having a recess has, in which engages the locking part of the body; a second transmission rod, through the latching recess of the second Sleeve is guided and a through hole as well a first and second end, wherein at the first end a second engagement element is provided, which in the first engagement element of the first gear rod engages; a screwdriver blade passing through the through hole the second gear rod is guided and in the blind hole the first transmission rod protrudes; and a rotary body, which is pushed into the body and a through hole has, through which the first gear rod is guided.

At the second end of the second gear rod is a threaded portion provided, which has several slots and on the one clamping nut is screwed on.

The Screwdriver blade has a first and second end, wherein an annular groove is provided at the first end, into which a ring engages, and wherein a positioning recess is provided at the second end is.

The Positioning unit contains one positioning part, six positioning points, two pawls and two spring elements, wherein the positioning part formed by the annular inner wall of the receiving space is, where the six positioning points are divided into two groups, which are attached to the positioning part, wherein the two spring elements are supported on the pawls, each one Own bolts and are hinged to the receiving space, and that the rotary body two positioning pins and two pressure elements wherein the two positioning pins each form a positioning projection, the elastic in one of the positioning of the positioning of the recording room can intervene.

At the outside of the body are a plurality of receiving recesses provided, wherein between two adjacent receiving recesses a locking groove is provided, and that the first sleeve accordingly the locking grooves of the body an elastic latching projection ausformt, which can engage in one of the locking grooves.

Of the Rotary body is connected to a knob, which with a Cap is provided, in which the rack of the first gear rod intervenes.

• 1. durch den Grundkörper und die erste Hülse, die eine Positioniereinheit und Schraubenzieherköpfe aufnehmen, ist ein Austausch des Schraubenzieherkopfs und eine Umschaltung der Drehrichtung des Ratschenschraubenziehers möglich;
• 2. die erste und zweite Getriebestange stehen durch das erste und zweite Eingriffselement in Eingriff, wodurch die Festigkeit der Getriebestange erhöht wird, so dass die Verformung bei einer größeren Länge der Getriebestange vermieden wird;
• 3. die Positioniereinheit befindet sich im oberen Ende des Grundkörpers und liegt somit nahe an den Angriffspunkten der Finger, so dass der Benutzer die Schraube besser betrachten kann;
• 4. die Zahnstange der erste Getriebestange greift in die Zahnprofilausnehmung der Kappe ein, wodurch ein Rückdrehmoment durch die Ratsche bei der Unterbrechung der Drehbewegung vermieden werden kann;
• 5. an der Außenseite des Grundkörpers sind mehrere Aufnahmeausnehmungen für verschiedene Schraubenzieherköpfe vorgesehen, die leicht herausgenommen und mitgeführt werden können;
• 6. die Schraubenzieherklinge kann frei in der ersten und zweiten Getriebestange verschoben und positioniert werden, wodurch die Länge der Schraubenzieherklinge je nach dem Einsatzraum verstellt werden kann.

The invention has the following advantages:

• 1. by the main body and the first sleeve, which accommodate a positioning and screwdriver heads, is an exchange of screws Herkopfs and switching the direction of rotation of the ratchet screwdriver possible;
• 2. the first and second transmission rods are engaged by the first and second engagement members, thereby increasing the strength of the transmission rod so as to avoid deformation with a longer length of the transmission rod;
• 3. The positioning unit is located in the upper end of the body and thus lies close to the points of attack of the fingers, so that the user can better look at the screw;
• 4. the rack of the first gear rod engages the Zahnprofilausnehmung the cap, whereby a return torque can be avoided by the ratchet in the interruption of the rotational movement;
• 5. on the outside of the body several receiving recesses for different screwdriver heads are provided, which can be easily removed and carried;
• 6. The screwdriver blade can be freely moved and positioned in the first and second gear rod, whereby the length of the screwdriver blade can be adjusted depending on the application space.

in the The invention is based on an embodiment described in detail with reference to the drawings. In the drawing shows:

1 an exploded view of the ratchet screwdriver according to the invention

2 a perspective view of the invention Ratchet screwdriver

3 a sectional view of the ratchet screwdriver according to the invention

4 a sectional view taken along the line AA in 3 .

5 a sectional view taken along the line BB in 3 .

6 a sectional view of the ratchet screwdriver according to the invention, wherein the pressure element pushes a pawl,

7 a sectional view of the ratchet screwdriver according to the invention, wherein a screwdriver head is removed through the longitudinal opening,

8th a schematic representation of the ratchet screwdriver according to the invention when turning a screw, and

9 a sectional view of the ratchet screwdriver according to the invention, wherein the inserted length of the screwdriver blade is adjusted.

Like from the 1 . 2 and 3 it can be seen, the ratchet screwdriver according to the invention has a base body 1 , a first sleeve ( 2 ), a first transmission rod ( 3 ), a second sleeve ( 4 ), a second transmission rod ( 5 ), a screwdriver blade ( 6 ) and a rotary body ( 7 ).

The basic body ( 1 ) has a receiving space in the upper end ( 11 ) and a through hole ( 12 ) on. In the recording room ( 11 ) of the basic body ( 1 ) is a positioning unit ( 4 ). The positioning unit contains a positioning part ( 13 ), six positioning points ( 14 ), two pawls ( 15 ) and two spring elements ( 16 ). The positioning part ( 13 ) is through the annular inner wall of the receiving space ( 11 ) educated. The six positioning points ( 14 ) are divided into two groups, which at the positioning part ( 13 ) are mounted. The two spring elements ( 16 ) are on the pawls ( 15 ) supported. The pawls ( 15 ) each have a bolt ( 151 ) and are at the recording room ( 11 ) hinged. (The positioning unit is not part of the invention and will therefore not be described in detail.) On the outside of the main body ( 1 ) are a plurality of longitudinal receiving recesses ( 17 ), in which various screwdriver heads (A) can be accommodated. Between two adjacent receiving recesses ( 17 ) is in each case a locking groove ( 18 ) intended. The basic body ( 1 ) forms on the bottom of a locking part ( 19 ) out.

The first sleeve ( 19 ) encloses the main body ( 1 ) and for the longitudinal receiving recesses ( 17 ) a longitudinal opening ( 21 ) on. The first sleeve ( 19 ) forms according to the locking grooves ( 18 ) of the basic body ( 1 ) an elastic latching projection ( 22 ), which in one of the Rastnuten ( 18 ) can lock ( 5 ).

The first transmission rod ( 3 ) is through the through hole ( 12 ) of the basic body ( 1 ) and has a blind hole ( 31 ) on. The first transmission rod ( 3 ) further has first and second ends. At the first end is a rack ( 32 ) provided with a sprocket ( 33 ) is engaged, the teeth ( 34 ) possessed by the pawls ( 15 ) of the basic body ( 1 ) can be locked. At the second end of the transmission rod ( 3 ) is a first engagement element ( 35 ) intended.

The second sleeve ( 4 ) has a latching recess ( 41 ), in which the locking part ( 19 ) of the basic body ( 1 ) can engage.

The second gear rod ( 5 ) is through the Recess ( 41 ) of the second sleeve ( 4 ) and has a through hole ( 51 ) and a first and second end. At the first end is a second engagement element ( 52 ) provided in the first engagement element ( 35 ) of the first gear rod ( 3 ) intervenes. At the second end is a threaded section ( 54 ), which has several slots ( 53 ) owns. On the threaded section ( 54 ) is a clamping nut ( 55 ) screwed.

The screwdriver blade ( 6 ) is through the through hole ( 51 ) of the second gear rod ( 5 ) and protrudes into the blind hole ( 31 ) of the first gear rod ( 3 ) one. The screwdriver blade ( 6 ) has first and second ends. At the first end is an annular groove ( 61 ) into which a ring ( 62 ) intervenes. At the second end is a Positionierausnehmung ( 63 ), in which a screwdriver head (A) can be positioned.

The rotary body ( 7 ) is in the body ( 1 ) and has a through hole ( 71 ), through which the first gear rod ( 3 ) is guided. The rotary body ( 7 ) further has two positioning pins ( 72 ) and two printing elements ( 73 ). The two positioning pins ( 72 ) each form a positioning projection ( 74 ), which elastically into one of the positioning points ( 14 ) of the positioning part ( 13 ) of the recording room ( 11 ) can intervene. The positioning projections ( 74 ) can be turned forward and backward into the corresponding positioning points ( 14 ), whereby the printing elements ( 73 ) against the pawls ( 15 ) so that the direction of rotation of the sprocket ( 33 ) can be switched. The rotary body ( 7 ) is with a rotary knob ( 75 ), which is capped ( 76 ) is provided. The cap ( 76 ) has a Zahnprofilausnehmung inside ( 761 ) into which the rack ( 32 ) of the first gear rod ( 3 ) intervenes.

When using, as in the 1 to 6 can be seen, the rotary body can be rotated forward or backward to switch the direction of rotation. The positioning projections ( 74 ) of the positioning pins ( 72 ) into the corresponding positioning points ( 14 ) of the positioning part ( 13 ) of the recording room ( 11 ) one. (This is part of a known technique and is therefore not described). If the positioning projections ( 74 ) into the positioning points ( 14 ) for forward rotation, one of the two pressure elements ( 73 ) the pawl ( 15 ) push away the teeth ( 34 ) of the sprocket ( 33 ), whereby the sprocket ( 33 ) can be turned forward.

Subsequently, the first sleeve ( 2 ) are rotated, wherein the locking projection ( 22 ) elastically from the recess ( 18 ) can escape until the longitudinal opening ( 21 ) the receiving recess ( 17 ) of the desired screwdriver head (A). Through the longitudinal opening ( 21 ), the desired screwdriver head (A) can be distributed ( 7 ). Then the first sleeve ( 2 ) are rotated again so that the longitudinal opening ( 21 ) with no receiving recess ( 17 ) is aligned, wherein the latching projection ( 22 ) again in a recess ( 18 ), so that a leakage of the screwdriver heads (A) from the longitudinal opening ( 21 ) is prevented. The selected screwdriver head (A) is inserted in the positioning recess ( 63 ) of the screwdriver blade ( 6 ) ( 3 ). Depending on the application space, the into the through hole ( 51 ) and the blind hole ( 31 ) of the first gear length ( 3 ) inserted length of the screwdriver blade ( 6 ) are adjusted ( 9 ). Then the clamping nut ( 55 ) of the second transmission length ( 5 ) to tighten the screwdriver blade ( 6 ) in the set length. Thereafter, the user with the thumb and the middle finger, the second sleeve ( 4 ) to grab ( 8th ) and with the pointer finger the push button ( 75 ) and the cap ( 76 ) to hold the screwdriver head (A) on the screw (B). If the second sleeve ( 4 ) is rotated, the rotational force on the first sleeve ( 2 ), the first transmission rod ( 3 ) and the second gear rod ( 5 ) on the screwdriver blade ( 6 ), whereby the screwdriver head (A) is turned forward, so that the screw (B) is tightened. In the power transmission is by the second engagement element ( 52 ) and the first engagement element ( 51 ) the connection strength of the first and second gear rod ( 3 ) 85 ) elevated. In addition, the user can look at the screw better, since the sprocket ( 33 ) is higher and close to the points of attack of the fingers. By the engagement of the rack ( 32 ) of the first gear rod ( 3 ) and the Zahnprofilausnehmung ( 761 ) of the cap ( 76 ), a reverse torque can be avoided by the ratchet in the interruption of the rotational movement.

The The above description represents only a preferred embodiment of the invention and should not be used as a definition of boundaries and serve the scope of the invention. All equivalent changes and modifications are within the scope of this invention.

1

body

11

accommodation space

12

Through Hole

13

positioning

14

positioning point

15

pawl

151

bolt

16

spring element

17

receiving recess

18

recess

19

catch part

2

first shell

21

longitudinal opening

22

catch projection

3

first transmission rod

31

blind

32

rack

33

sprocket

34

tooth

35

first engaging member

4

second shell

41

recess

5

second transmission rod

51

Through Hole

52

second engaging member

53

slot

54

threaded portion

55

clamping nut

6

screwdriver blade

61

ring groove

62

ring

63

positioning recess

7

rotating body

71

Through Hole

72

positioning

73

pressure element

74

positioning

75

knob

76

cap

761

Zahnprofilausnehmung

A

screwdriver head

B

screw

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - TW 586472 [0002]

Claims (6)

Telescopic precision ratchet screwdriver comprising a base body ( 1 ), which has a receiving space ( 11 ) and a through hole ( 12 ), wherein in the receiving space ( 11 ) a positioning unit is received, and wherein the basic body ( 1 ) on the bottom of a locking part ( 19 ), a first sleeve ( 19 ), which is the main body ( 1 ) encloses a first gear rod ( 3 ) passing through the through hole ( 12 ) of the basic body ( 1 ) and a blind hole ( 31 ) and a first and second end, wherein at the first end a rack ( 32 ) provided with a sprocket ( 33 ) is engaged, the teeth ( 34 ) possessed by the pawls ( 15 ) of the positioning unit can be locked, and wherein at the second end of the first gear rod ( 3 ) a first engagement element ( 35 ), a second sleeve ( 4 ), which has a catch recess ( 41 ), in which the locking part ( 19 ) of the basic body ( 1 ), a second gear rod ( 5 ), which through the recess ( 41 ) of the second sleeve ( 4 ) and a through hole ( 51 ) and a first and second end, wherein at the first end a second engagement element ( 52 ) provided in the first engagement element ( 35 ) of the first gear rod ( 3 ), a screwdriver blade ( 6 ) through the through-hole ( 51 ) of the second gear rod ( 5 ) and in the blind hole ( 31 ) of the first gear rod ( 3 protrudes, and a rotary body ( 7 ), which is in the main body ( 1 ) and a through hole ( 71 ), through which the first gear rod ( 3 ) is guided. Telescopic precision ratchet screwdriver according to claim 1, characterized in that at the second end a threaded portion ( 54 ), which has several slots ( 53 ) and on which a clamping nut ( 55 ) is screwed. Telescopic precision ratchet screwdriver according to claim 1, characterized in that the screwdriver blade ( 6 ) has a first and second end, wherein at the first end an annular groove ( 61 ) into which a ring ( 62 ), and wherein at the second end a Positionierausnehmung ( 63 ) is provided. Telescopic precision ratchet screwdriver according to claim 1, characterized in that the positioning unit is a positioning part ( 13 ), six positioning points ( 14 ), two pawls ( 15 ) and two spring elements ( 16 ), wherein the positioning part ( 13 ) through the annular inner wall of the receiving space ( 11 ), the six positioning points ( 14 ) are divided into two groups which are located on the positioning part ( 13 ) are mounted, wherein the two spring elements ( 16 ) on the pawls ( 15 ) are supported, each having a bolt ( 151 ) and at the receiving space ( 11 ) are hinged, and that the rotary body ( 7 ) two positioning pins ( 72 ) and two printing elements ( 73 ), wherein the two positioning pins ( 72 ) each have a positioning projection ( 74 ), which elastically into one of the positioning points ( 14 ) of the positioning part ( 13 ) of the recording room ( 11 ) can intervene. Telescopic precision ratchet screwdriver according to claim 1, characterized in that on the outside of the base body ( 1 ) a plurality of receiving recesses ( 17 ) are provided, wherein between two adjacent receiving recesses ( 17 ) each have a locking groove ( 18 ), and that the first sleeve ( 19 ) corresponding to the locking grooves ( 18 ) of the basic body ( 1 ) an elastic latching projection ( 22 ) forms into one of the locking grooves ( 18 ) can engage. Telescopic precision ratchet screwdriver according to claim 1, characterized in that the rotary body ( 7 ) with a rotary knob ( 75 ), which is capped ( 76 ), in which the rack (in 32 ) of the first gear rod ( 3 ) intervenes.