JP4354783B2 - Fastener and its socket unit - Google Patents

Description

The present invention is a tightening suitable for tightening and loosening work when the work space around the nut is narrow and the position from the operator's position is far away from the nut, such as nut tightening or loosening work of the tire after the truck. It relates to a tool and its socket unit.

For tightening or loosening large bolts and nuts, as shown in FIG. 6, a large torque fastener is used (Patent Document 1).
Tool with the clamping is constructed by connecting a socket unit (8) to the clamping Tsukegu body (1).
The fastener body (1) is of a motor drive type, and the rotating shaft of the motor (13) is connected to the multi-stage planetary gear mechanism (15) via the gear train (14), so that the final stage planetary gear is provided. A rotating cylinder having an inner tooth (15b) with which the planetary gear (15a) meshes with the inner output shaft (11) by forming a spline (17) on the inner surface of the cylindrical portion at the tip of the planetary gear carrier (16) of the mechanism. A cylindrical outer output shaft (12) is projected from the tip of (18). A plurality of claw pieces (10) project from the tip of the outer output shaft (12).
The rotational directions of the output shafts (11) and (12) are opposite.

The socket unit (8) includes a socket (84) having a nut engaging hole (83) at the distal end and a spline (85) on the outer periphery of the proximal end, and the socket (84) rotatably fitted and a reaction force outward of the distal end. A casing (82) having a plurality of notches (86) in the base end outer peripheral large diameter portion is provided.

Fit the spline (85) of the socket (84) into the spline (17) of the inner output shaft (11) of the fastener body (1), and insert the outer output shaft (86) into the notch (86) of the casing (82). Fit the nail piece (10) of 12). The casing unit (82) is pressed by the set screw (19) of the outer output shaft (12) to prevent the socket unit (8) from falling off.

Fitted socket (84) to the nut to attach and tighten, to rotate the inner output shaft (11) by the motor (13), a socket (84) be rotated, tighten the nut. The tightening reaction force is transmitted to the casing (82) of the socket unit (8) via the planetary gear mechanism (15) and the outer output shaft (12), and the casing (82) exerts a rotational force in a direction opposite to the tightening direction. However, the reaction force receiver 81 can receive a tightening reaction force by hitting a nut or an obstacle (not shown) in the vicinity of the nut to be tightened.
In order to loosen the nut, the motor (13) may be reversely rotated, or the socket (84) may be reversely rotated by mechanical switching.

Japanese Patent No. 3232291

An impact wrench is used for attaching and detaching automobile tires. However, since an impact wrench generates a loud noise during operation, there is a problem that it is difficult to use depending on a work time zone and a work place.
Since the above-mentioned fastener is an operation that does not involve an impact, the operation sound is quiet. However, before Symbol fastening tool, and the mounting of the tire after the track, there is a case that can not be used to remove.
The threaded part of the wheel nut of the rear tire of the truck is in a large recessed part in the center of the wheel, and the hub of the axle protrudes in the center of the recessed part, so that the working space around the nut is small, and the hub and wheel There are cases where the inner peripheral wall of the door becomes in the way and the fastener cannot be used.
In addition, when the nut is tightened by rotating the socket (84), the fastener receives the reaction force receiving force as the nut is tightened if there is a gap between the reaction force receiver (81) and the obstacle. (81) for rotation in the opposite direction only tightening direction the clearance amount, accident of injury across the finger was absolute Enaka' in the gap.
Before the socket (5) is driven to rotate, the accident can be prevented by turning the reaction force receiver (6) and placing it on an obstacle. However, turning the reaction force receiving (6), the rotating cylinder of the clamping Tsukegu body (1) (18) as well, the planetary gear mechanism (15), is to be rotated the gear train (14) , With great frictional resistance, can not be turned lightly. For this reason, it takes time and effort to apply the reaction force receiver (6) to the obstacle in advance, which leads to injury.
The present invention is attachment of the rear tire of the truck can be used to remove, and are those manually readily reveal the fastener and the socket unit to enable you to shed a reaction force received by the obstacle.

The fastening tool of the present invention is a fastening tool body having a planetary gear mechanism (15) having an inner output shaft (11) and an outer output shaft (12) that are rotatable in opposite directions and having a concentric core (1). And an inner output shaft (11 ) of the fastener body (1) and a long socket unit (2) connected to the outer output shaft (12).
The socket unit (2) alone constitutes the invention. The socket unit (2) has a socket (5) for engaging the nut (91) at the distal end, and engages with the inner output shaft (11) at the proximal end. A tightening shaft (4) having a mating shaft portion (44);
A cylinder that can be rotated integrally with the outer output shaft (12), having a fastening shaft (4) rotatably fitted, and having an engagement shaft portion (33) that can be engaged with the outer output shaft (12) at the base end portion. A casing (3),
A reaction force receiver (6) for receiving a tightening reaction force acting on the outer output shaft (12) which is slidably provided on the cylindrical casing (3) in the axial direction of the casing ;
Is constituted by a handle (7) for turning the tubular casing (3) is provided and on the outer side of the cylindrical casing at a position to the tubular casing coaxial with the base end side of the lifting and the tubular casing (3) .

As shown in FIG. 4, the above-mentioned fastener is used by fitting the socket (5) to the nut (91) to be tightened and turning the handle (7) in the direction opposite to the nut tightening direction to receive the reaction force (6). the Ru against the obstacle in the vicinity of the nut. Operate the clamp body (1).
The rotation of the inner output shaft (11) is transmitted to the socket (5) via the tightening shaft (4) of the socket unit (2), and the nut (91) is tightened. Tightening reaction force of the nut, the planetary gear mechanism of the clamping Tsukegu body (1) (15), the outer output shaft (12), the tubular casing (3) of the socket unit (2) and the reaction force receiving (6) Via the obstacle. For this reason, the nut (91) can be securely tightened.
Since the above-mentioned fastener performs a fastening operation without an impact like a conventional impact wrench, it does not cause a problem of noise generation, and the use time zone and the use place are not selected. When tires need to be replaced due to puncture problems on the road, etc., it can be dealt with promptly.

Operation of applying the obstructions reaction force receiving (6) is tubular casing (3) of the clamping Tsukegu body (1) side of the receiving reaction force provided at the proximal end (6) The separate handle ( It can be performed by the rotating operation of 7), and can be operated more easily than turning the reaction force receiver (6) and the cylindrical casing (3) directly by hand. Also, when the reaction force receiver (6) is turned directly by hand, the operation switch is turned ON carelessly, and the reaction force receiver (6) is rotated by the tightening reaction force. (6) You are free from the risk of injury by placing your fingers between the obstacles.
Compared to the conventional socket unit, the fastener that is constructed by attaching the longer socket unit (2) to the fastener body (1) is heavy and difficult to carry. It can be hooked, lifted and moved.
The socket unit (2) alone is heavy, but it is needless to say that the socket unit (2) alone can be lifted and moved by hooking a suspension wire on the handle (7).

As shown in FIG. 1 , the fastening tool is configured by connecting a long socket unit (2) to a fastening tool body (1).
Since the fastener body (1) is the same as the motor-driven fastener body (1) described in the conventional example shown in FIG. 6, the reference numerals used in FIG. Instead of

In the socket unit (2), the tightening shaft (4) is fitted into the cylindrical casing (3) so as to be free to rotate with no runout, and both ends of the shaft (4) project from the cylindrical casing (3). I am letting.
The fastening shaft body (4) has a socket mounting shaft portion (41) having a square section at the distal end portion, and an engagement shaft portion (44) engageable with the inner output shaft (11) on the outer periphery of the base end portion. have. The engagement shaft portion (44) has a spline (43) that engages with the spline (17) of the inner output shaft (11) on the outer periphery.
A socket (5) is detachably attached to the attachment shaft portion (41).
The socket (5) has an engagement hole (51) into which a nut (91) is fitted at the tip, and a mounting hole (53) having a square cross section at the base end.
The mounting shaft part (41) is fitted into the mounting hole (53) of the socket (5), and the pin (56) is fitted into the through-pin holes (42) (54) opened perpendicularly to both shaft cores. The socket (5) is prevented from falling off.
On the outer periphery of the socket (5), an O-ring (55) is fitted in a circumferential groove opened through the pin hole (54) to prevent the pin (56) from coming off.

In the cylindrical casing (3), the outer periphery from the substantially central portion to the distal end side is formed as a square shaft portion (32) having a regular hexagonal cross section, and the proximal end side is formed as a round shaft portion (31).
The base end of the round shaft portion (31) is a large-diameter engagement shaft portion (33), and the claw portion (10) of the outer output shaft (12) is fitted into the engagement shaft portion (33). A plurality of full recessed steps (34) for insertion are provided.

A handle (7) is attached to the round shaft (31) of the cylindrical casing (3).
The handle (7) is a round handle, and the round shaft portion (31) is fitted to the central boss (71), and the boss (71) is brought into contact with the end surface of the engagement shaft portion (33). A handle (7) is fixed to the cylindrical casing (3) by tightening a screw (72) penetrating the boss (71) to the cylindrical casing (3).

A reaction force receiver (6) is attached to the angular shaft portion (32) of the cylindrical casing (3).
The reaction force receiver (6) has a rectangular shaft portion (32) slidably fitted in the base end hexagonal hole (60), and an arm (61) extending laterally perpendicular to the axis of the cylindrical casing (3). ) And a cylindrical member (62) protruding from the tip of the arm (61) in parallel with the cylindrical casing (3) toward the socket (5).
The tip of the member (62) is a round hole (63) into which the nut (91) fits in a marginal state.
The reaction force receiver (6) is such that the center distance between the member (62) and the socket (5) substantially corresponds to the distance between two adjacent nuts (91) (91a) of the track wheel shown in FIG. Is formed.
By sliding the reaction force receiver (6) on the square shaft part (32), tightening the set screw (64) screwed to the base end of the arm (61) and pressing the cylindrical casing (3) The reaction force receiver (6) can be fixed at an arbitrary position of the angular shaft portion (32).
As shown in FIG. 1, the tip of the member (62) of the reaction force receiver (6) is fixed in a state where the reaction force receiver (6) is fixed to the retaining ring (36) applied to the tip of the cylindrical casing (3). And the socket (5) are almost aligned.

As shown in FIG. 4, with the socket (5) fitted to the nut (91) of the wheel (9) of the rear tire of a large truck, the handle (7) is positioned outside the wheel (9). distance from the top Kiso socket (5) tip to the handle (7) is determined.

Thus, fastening shaft body of the socket unit (2) and (4) the proximal end of the spline (43), meshes with the spline (17) of the inner output shaft of the clamping Tsukegu body (1) (11), a tubular casing Insert the claw (10) of the outer output shaft (12) into the recessed step (34) for fitting (3), and tighten the set screw (19) on the outer output shaft (12) to tighten the clamp body ( 1) to connect the socket unit (2), assembling the fastener.

As shown in FIG. 4, the nut (91) of the hand-cranked by temporarily tightened tire wheel (9), fitting the sockets (5) of the fastener. At this time, the handle (7) is held and the cylindrical casing (3) is turned so that the hole (63) of the reaction force receiver (6) faces the adjacent nut (91a), and the socket (5) and the hole (63) At the same time, two nuts 91 and 91a are fitted.

The clamp body (1) is operated to rotate the inner output shaft (11) in the direction of loosening the nut.
The rotation of the inner output shaft (11) is transmitted to the socket (5) via the tightening shaft (4) of the socket unit (2), and the nut (91) is tightened. Tightening reaction force of the nut, the planetary gear mechanism of the clamping Tsukegu body (1) (15), the outer output shaft (12), the tubular casing (3) of the socket unit (2) and the reaction force receiving (6) Through the adjacent nut (91a). For this reason, the nut (91) can be securely tightened.

Wherein as the operation to fit the reaction force received the (6) the nut (91a) is performed by the rotation operation of the handle (7) located closer to the clamping Tsukegu body (1) side of the reaction force receiver (6) It can be operated more easily than directly turning the reaction force receiver (6) and the cylindrical casing (3) by hand.
Since the handle (7) of the embodiment is a round handle concentric with the cylindrical casing (3), the reaction force receiver (6) can be manually rotated from any position of 360 ° with respect to the cylindrical casing (3). Workability is extremely good.
Also, as when the reaction force receiver (6) is turned directly by hand, the motor switch is turned on carelessly, and the reaction force receiver (6) rotates by the tightening reaction force. (6) You are free from the risk of injury by placing your fingers between the nut (91a).

Compared with the conventional socket unit, the fastener with the long socket unit ( 2 ) of the present invention is heavy and difficult to carry, but it is possible to hook the suspension wire to the handle (7) and lift it to move. Can do.
The socket unit (2) alone is heavy, but it is needless to say that the socket unit (2) alone can be lifted and moved by hooking a suspension wire on the handle (7).

The size of the track, thus the difference in vehicle type, etc., the distance between the holes (63) of the reaction force receiving (6) and the socket (5) is, corresponding to the distance between the two nuts adjacent (91) (91a) Otherwise, the reaction force receiver (6) can be applied to an obstacle other than the nut (91a) such as the axle hub (92) to receive the tightening reaction force.
In this case, the reaction force receiver (6) can be slid on the angular shaft portion (32) and set at an optimum position for hitting an obstacle.

FIG. 5 shows another embodiment of the reaction force receiver (6).
The arm (61) is provided with a guide groove (65) extending from the proximal end side to the distal end side, and a screw shaft (66) protruding from the cylindrical member (62) is slid into the guide groove hole (65). The member (62) can be fixed at an arbitrary position on the guide slot (65) with a washer (67) and a nut (68).
If the cylindrical casing (3) of the socket unit (2) is fitted into the hexagon hole (60) at the base end, the reaction force receiver (6) can arbitrarily adjust the distance between the socket (5) and the member (62). Therefore, the socket (5) and the reaction force receiver (6) can be securely fitted to the two adjacent nuts (91) (91a).

To loosen the nut (91), reversely rotate the motor (13) of the clamping Tsukegu body (1), or by mechanical switching it is sufficient to reverse rotation of the socket (5).

Socket unit (2)及beauty fastening Tsukegu of the present invention, the mounting of truck tires, is not limited to be used for removal, it can not be used in fastener of Figure 6, the bolt in a narrow working space Of course, it can be used to tighten and loosen the nut.

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  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

It is a cross-sectional view of the socket unit attached to clamping Tsukegu body. It is a front view of a socket unit. It is a side view of a socket unit. It is an explanatory view of a state of use of fasteners. It is a slope view of other examples of a reaction force receiver. It is sectional drawing of the fastener previously proposed by the applicant.

1 clamping Tsukegu body 2 socket unit 3 cylindrical casing 4 shaft 5 a socket 6 reaction force received 7 handle fastening

Claims (4)

A long socket used by connecting to a clamp body (1) having a planetary gear mechanism (15) having an inner output shaft (11) and an outer output shaft (12) concentrically rotatable in opposite directions. Unit (2),
A tightening shaft body (4) having a socket (5) for engaging a nut (91) at a distal end and an engagement shaft portion (44) for engaging an inner output shaft (11) at a proximal end;
A cylinder that can be rotated integrally with the outer output shaft (12), having a fastening shaft (4) rotatably fitted, and having an engagement shaft portion (33) that can be engaged with the outer output shaft (12) at the base end portion. A casing (3),
A reaction force receiver (6) that is fitted to the cylindrical casing (3) so as to be slidable and integrally rotatable with the cylindrical casing, and to receive a tightening reaction force acting on the outer output shaft (12);
It constituted by a cylindrical casing (3) provided at the base end side of the lifting and the tubular casing (3) handle to turn (7), the socket unit. The socket unit according to claim 1, wherein the handle (7) is a round handle that is located on a proximal end side of the cylindrical casing (3), is concentric with the cylindrical casing and is provided outside the cylindrical casing. . A fastener body (1) having a planetary gear mechanism (15) having an inner output shaft (11) and an outer output shaft (12) coaxially rotatable in opposite directions, and an inner portion of the fastener body In a fastener consisting of an output shaft (11) and a socket unit (2) connected to the outer output shaft (12),
The socket unit (2) is provided with a socket (5) that engages a nut (91) at the distal end and a fastening portion that includes an engagement shaft portion (44) that engages with the inner output shaft (11) at the proximal end. The shaft (4),
  A cylinder that can be rotated integrally with the outer output shaft (12), having a fastening shaft (4) rotatably fitted, and having an engagement shaft portion (33) engageable with the outer output shaft (12) at the base end portion. A casing (3),
  A reaction force receiver (6) that is fitted in the cylindrical casing (3) so as to be slidable and integrally rotatable with the cylindrical casing, and to receive a tightening reaction force acting on the outer output shaft (12);
A fastening tool comprising a handle (7) provided on the proximal end side of the cylindrical casing (3) for lifting and turning the cylindrical casing (3). The tightening according to claim 3, wherein the handle (7) is a round handle located on the proximal end side of the cylindrical casing (3), concentric with the cylindrical casing and provided outside the cylindrical casing. Ingredients .

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