JPH05146924A - Nut runner - Google Patents

Abstract

PURPOSE:To miniaturize a connecting system of a drive section and a head section by supporting the head section having a socket rotatably against the drive section, and connecting the drive section and the head section with two shafts and two gears. CONSTITUTION:A head section main body 17 is fixed via an optional means, the output shaft 3a of a drive section 3 is rotated, the first shaft 10 connected to the output shaft 3a is rotated, then the second shaft 14 having the second gear 20 engaged with the first gear of the first shaft 10 is rotated, and a rotary shaft 12 spline-coupled with the second shaft 14 via a hollow shaft 11 is rotated together with a socket 13. When a head section main body 17 is rocked by an optional means while the axis of the first shaft 10 serves as the rotation center, the rotary shaft 12 having the socket 13 is rocked together with the hollow shaft 11 and the second shaft 14 while the first shaft 10 serves as the rotation center, and the position of the socket 13 against a board 2 is moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nut runner in which a head portion having a socket can be swung with respect to a drive portion. The present invention relates to a nut runner useful when forming a multi-axis type nut runner.

[0002]

2. Description of the Related Art For example, in an automobile production line,
When the first member and the second member are integrated with each other by using a plurality of bolts, a multi-shaft type nut runner is usually used and the plurality of bolts are collectively tightened so that the two members are joined together. I try to reduce the work time.

Further, when the production line is a mixed line in which many kinds of vehicles are flown, the number of bolts required to integrate the first member and the second member and The spacing between bolts may vary.

In such a case, the head portion and the drive portion are separately formed in the multi-spindle nut runner, and only the head portion is replaced to use the multi-spindle nut runner corresponding to various works, or , I used a multi-axis nutrunner that can move the position of each socket on the head.

[0005]

In order to cope with the tightening work of various kinds of works flowing through the mixed line, the multi-shaft type nut runner in which the head part and the driving part are formed separately as described above, When the one in which the position of each socket of the head part can be moved is used, the above type generally has a structure in which the drive part and the head part are connected through a constant velocity joint, There is a problem that the entire apparatus including this connecting portion becomes very large, and a large space is required for installing the nut runner.

Further, if the drive unit and the head unit are connected via a constant velocity joint, there is a problem that a large torque cross is generated in the power transmission member connecting the drive unit and the socket of the head unit.

[0007]

A nut runner is arranged such that an output shaft is located in a support hole provided in a board so that the nut runner is rotatable with respect to the drive section fixed on the board. And a head section arranged in front of the drive section,

The head portion is rotatably supported in the support hole of the head portion so that the head portion is rotatably supported by the drive portion, and the rear end is in the rear end tubular portion. , So that the tip is located inside the head body,
A first shaft rotatably supported with respect to the main body of the head and having a rear end connected to an output shaft of the drive unit;
The first gear fixed to the tip of the shaft of the head is rotatably supported in the head body so as to be parallel to the first shaft, and the tip is provided at the front of the head body. A second shaft positioned inside the portion, a second gear fixed to the second shaft, meshing with the first gear, rotatably inserted into the distal cylindrical portion, and a rear end of the second shaft. The hollow cylinder is connected to the shaft, and the rotary shaft has a socket at the tip and is spline-fitted into the hollow cylinder.

[0009]

As described above, the head portion having the socket is rotatably supported with respect to the drive portion, and the drive portion and the head portion are provided with two shafts and two shafts without using a constant velocity joint or the like.
By connecting with the individual gears, the head part can be rotated with respect to the drive part, and a nut runner in which the connecting mechanism between the head part and the drive part is very compact is formed.

[0010]

FIG. 1 shows a nut runner (1) according to the present invention. The nut runner (1) shown in this drawing is
A substrate (2) that supports the entire nutrunner (1), a drive unit (3) fixed to the rear surface of the substrate (2), and a drive unit (3) that is rotatable with respect to the drive unit (3). )
And a head portion (4) arranged in front of the.

The substrate (2) has a flat plate shape, and a tubular body (6) for forming a support hole (5) is welded and fixed at a predetermined position in the support hole (5). A rear end cylindrical portion (15) of a head portion main body (17) described later is inserted.

Further, (7) in the figure is a reinforcing rib formed at a predetermined position on the front surface of the substrate (2).

Assembling of the drive unit (3) to the substrate (2) having the above-mentioned shape is performed by fixing the drive unit (3) to the substrate (2) via the bracket (8) as shown in the figure. The output shaft (3a) protruding from the front end surface of 3) is located in the support hole (5).

The head portion (4) has a rear end connected to the first shaft (10) connected to the output shaft (3a), and a front end provided with a hollow cylinder (11) and a rotary shaft (12) through a socket. A rear end cylindrical portion (15) and a front end tube for supporting the second shaft (14) connected to (13) and the first and second shafts (10) and (14) in a parallel state. A main body of the head portion (17) having the shape portion (16) is a main component.

The head portion main body (17) includes a rear end tubular portion (1).
5) is rotatably inserted into the support hole (5) through the bush (18) as shown in the figure, so that the substrate (2) is
It is also rotatable with respect to the drive unit (3).

Further, on the side of the head main body (17),
An arm part (1) used when connecting an actuator for swinging the head part (4) and the head part body (17).
8) has been formed.

The first shaft (10) has its rear end located in the rear end tubular portion (15) of the head body (17) and its tip located in the head body (17). Is rotatably supported and the rear end is the output shaft (3a) of the drive unit (3).
And a first gear (19) is fixedly provided on the outer circumference of the tip portion.

The second shaft (14) is rotatably supported in the head main body (17) so that the front end of the second shaft (14) is located in the front end cylindrical portion (16) of the head main body (17). A second gear (20) meshing with the first gear (19) is fixed to a portion of the outer periphery of the second shaft (14) facing the first gear (19). The first shaft (10) and the second shaft (14) are connected by the first and second gears (19) (20).

A hollow shaft (1) having a rear end connected to the second shaft (14) is provided in the distal end tubular portion (16).
1) is rotatably inserted. A rotating shaft (12) having a socket (13) at the tip of the hollow shaft (11) is slidable with respect to the hollow shaft (11) and rotates integrally with the hollow shaft (11). Inserted in the hollow shaft (11)
A spring (21) is press-fitted between the socket and the socket (13).

In the above structure, the head body (17)
When the output shaft (3a) of the drive unit (3) is rotated and the first shaft (10) connected to the output shaft (3a) is rotated with the output shaft (3a) fixed by any means, the first shaft ( 1
The second shaft (14) having the second gear (20) meshing with the first gear (19) of (0) also rotates, and through the second shaft (14) and the hollow shaft (11). The rotating shaft (12) that is fitted with a spline
3) Rotate with.

Further, when the head main body (17) is swung by any means around the axis of the first shaft (10) as a rotation center, the rotary shaft (1) having the socket (13) is formed.
2) also the hollow shaft (11) and the second shaft (1)
Together with 4), the position of the socket (13) with respect to the substrate (2) can be moved by swinging around the first shaft (10) as a rotation center.

At this time, the first gear (19) of the first shaft (10) and the second gear (19) of the second shaft (14).
Of the output shaft (3
The rotational force of a) is reliably transmitted to the socket (13) even if the socket (13) moves.

FIG. 2 is a front view showing an example in which two nut runners (1) having the above structure are combined to form a multi-shaft type nut runner (30).

In the figure, (2) is a substrate, and (1)
Reference numeral (1) denotes two nut runners arranged on the board (2). As described above, the nut runners (1) are assembled to the board (2) by the driving section (3) of each nut runner (1). Is fixed to the rear surface of the substrate (2) via a bracket (8), and the rear end cylindrical portion (15) of the head portion (4) is rotated into each support hole (5) provided in the substrate (2). It is designed to be freely supported.

Reference numeral (31) is a rotary table set slightly opposite both nut runners (1) and (1) on the board (2), and the rotary table (31) is fixed on the board (2). A rotary actuator (not shown) is used for rotation.

(32) and (33) are nut runners (1)
The (1) and the rotary table (31) are connected to the pivots (34) (3
5) A connecting link for connecting via (36) and (37).

In the above structure, when the rotary table (31) is rotated by the action of the rotary actuator, both nut runners (1) are rotated as shown in FIGS.
The head portions (4) and (4) of (1) swing to move the socket (1
3) The position of (13) on the substrate (2) can be changed.

That is, a constant velocity joint is not used for connecting the drive unit (3) and the head unit (4), and the socket (1
It is possible to form a miniaturized multi-axis nutrunner (30) capable of moving 3).

In the above embodiment, an example of forming the multi-spindle type nut runner (30) by two nut runners (1) (1) has been described. 2) Set on the head, and by rotating the head portion (4) of each nut runner (1) by a plurality of actuators, a large number of sockets (13)
It is also possible to form a multi-axis nutrunner (30) movably supported on the base plate (2).

[0030]

As described above, the nut runner according to the present invention rotatably supports the head portion having the socket with respect to the drive portion, and does not use a constant velocity joint or the like between the drive portion and the head portion. Since the two shafts and the two gears are connected to each other, it is possible to form a nut runner in which the connecting mechanism between the drive unit and the head unit is extremely compact.

Therefore, by combining a plurality of the above nut runners, it is possible to form a small multi-axis type nut runner in which the position of each socket can be moved.

If this multi-axis nut runner is used for tightening various types of works flowing through the mixed line, the installation space for the multi-axis nut runner can be reduced.

Further, since the nut runner according to the present invention has a structure in which the drive unit and the socket of the head unit are connected by a gear, the drive unit and the socket of the head unit are connected using a constant velocity joint. Compared to, Torcross is very small and efficient tightening work can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a nut runner according to the present invention.

FIG. 2 is a front view showing an example in which a multi-shaft type nut runner is formed by the nut runner according to the present invention.

FIG. 3 is a front view showing an example in which a multi-shaft type nut runner is formed by the nut runner according to the present invention.

FIG. 4 is a front view showing an example when a multi-axis nut runner is formed by the nut runner according to the present invention.

[Explanation of symbols]

 1 Nutrunner 2 Substrate 3 Drive part 3a Output shaft 4 Head part 5 Support hole 10 First shaft 11 Hollow cylinder 12 Rotating shaft 13 Socket 14 Second shaft 15 Rear end cylindrical part 16 Tip cylindrical part 17 Head part main body 19 1st gear 20 2nd gear

Claims (1)

[Claims] 1. A drive unit fixed on a substrate such that an output shaft is located in a support hole provided in the substrate, and is rotatable with respect to the drive unit. The head part is arranged, and the head part is rotatably supported by the drive part by rotatably supporting the rear end cylindrical part in the support hole, and the rear part has a rear end. The first end, which is located in the end tubular part and is rotatably supported with respect to the head part main body so that the front end is located in the head part main body, and whose rear end is connected to the output shaft of the drive part The shaft, the first gear fixed to the tip of the first shaft, and the first gear are rotatably supported in the head body so that they are parallel to the first shaft, and the tip is in front of the head body. A second shaft located in the provided distal end tubular portion and fixed to the second shaft A second gear that meshes with the first gear, a hollow cylinder that is rotatably inserted in the distal end tubular portion, and has a rear end connected to the second shaft, and a socket at the distal end, and A nut runner comprising a hollow cylinder and a rotary shaft spline-fitted in the hollow cylinder.