JP2022150373A - Wheel nut fastening tool - Google Patents

Abstract

To provide a wheel nut fastening tool for simultaneously fastening a plurality of wheel nuts to a tire wheel that can correspond to both large and small wheel pitches.SOLUTION: In a wheel nut fastening tool, a plurality of sockets 1, which correspond to a plurality of wheel nuts attached to a tire wheel are so arranged as to project from a front face of a flat disc-shaped casing 3, a manual operation lever 2 is so projected as to be movable along an outer peripheral edge 3C of the flat disc-shaped casing, and further, an input shaft 6, which can be interlocked and connected to a rotary drive tool 5, is projected from a center of a rear face of the flat disc-shaped casing. The tool is so configured as to transmit a rotational torque of the input shaft to the socket via a gear group built in the flat disc-shaped casing. The tool comprises all socket radial position simultaneous adjustment means that increases and decreases a diameter of a socket arrangement pitch circle and causes the same to be coincident with a wheel pitch circle of the plurality of wheel nuts when moving the manual operation lever along the outer peripheral edge.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wheel nut tightening tool for tightening a plurality of wheel nuts on a tire wheel of an automobile.

Conventionally, as a tool for tightening a plurality of wheel nuts at the same time as a wheel nut tightening tool, as shown in FIG. A structure is known in which a plurality of gears 54 are provided inside and an electric rotating tool 53 is integrally attached to a rear surface 52B of a casing 52 (Patent Document 1).
Such conventional wheel nut fasteners have been suitable for tires with the same wheel pitch.

Japanese Patent No. 3313923

With conventional wheel nut fasteners (see FIG. 17 and Patent Document 1), many types of wheel nut fasteners are used in automobile repair shops where it is necessary to repair various automobiles with different wheel pitches. There was a problem of having to prepare a set.

In addition, while the life of the electric rotating tool 53 is long, the durability of the attached parts including the gear 54 and the socket 51 is short. There was also the problem that the device had to be discarded after the period of use.

Therefore, in the present invention, a plurality of sockets corresponding to a plurality of wheel nuts attached to the tire wheel are arranged so as to protrude from the front surface of the flat plate-shaped casing; an input shaft protruding from the center of the rear surface of the flat-plate-like casing, which can be interlocked and connected to the rotary drive tool; and a rotating torque of the input shaft. , transmission to the socket via a gear group incorporated in the flat plate-shaped casing; and movement of the manual operation lever along the outer peripheral edge increases or decreases the diameter of the pitch circle provided with the socket. and means for simultaneously adjusting all socket radial positions to match the wheel pitch circles of the plurality of wheel nuts.

In addition, the flat-plate-shaped casing includes; a circular shallow plate-shaped first outer plate having a front wall portion and a first outer peripheral wall portion; and a circular shallow plate-like outer plate having a rear wall portion and a second outer peripheral wall portion. 2 outer plates; a middle plate housed in a disc-shaped space formed by the first outer plate and the second outer plate and having the manual operation lever fixed thereto; the first outer peripheral wall A circumferential window portion is formed through which the manual operation lever is inserted in the radial direction in a state in which the portion and the second outer peripheral wall portion are fitted to each other.

Also, the means for simultaneously adjusting the radial position of all the sockets has circular guide grooves of the same shape overlapping each other passing through the first outer plate and the second outer plate when viewed from one direction of the axis of the input shaft. further, the intermediate plate has an X-shaped inclination crossing the arc-shaped guide grooves of the first outer plate and the second outer plate when viewed from one direction of the axis of the input shaft. a guide groove extending through the socket; at each intersection of the arc-shaped guide grooves of the first outer plate and the second outer plate and the inclined guide groove of the intermediate plate, the shank of the socket; The radial position of all the sockets is adjusted simultaneously while each of the axial points of the sockets are coincident.

The gear group includes: a sun gear fixed to the input shaft; a plurality of planetary gears arranged at equal pitches around the sun gear and meshing with the sun gear; and a socket gear that is fixed to the attached socket shaft and meshes with the planetary gear.

According to the wheel nut tightening tool according to the present invention, it is possible to deal with wheel pitches of different sizes, so that a work site such as an automobile repair shop can use just one wheel nut tightening tool for various vehicles. It can be freely adapted to (tires).

It is a side view showing one embodiment of the present invention. It is a perspective view. FIG. 10 is a diagram showing an example of an intermediate plate, where (A) is a front view and (B) is a cross-sectional view taken along line aa of (A). It is a front view of a 2nd skin. It is a top view of a 2nd skin. It is a front view of a 1st skin. It is a top view of a 1st skin. It is a principal part cross-sectional side view. FIG. 11 is a front explanatory view of a main part showing a state corresponding to a wheel pitch of 150 mm; FIG. 11 is a front explanatory view of a main part showing a state corresponding to a wheel pitch of 140 mm; FIG. 11 is a front explanatory view of a main part showing a state corresponding to a wheel pitch of 114 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 150 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 140 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 120 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 114 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 100 mm; It is a partial cross-sectional side view which shows a conventional example.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the illustrated embodiments.
In one embodiment of the present invention shown in FIG. 1, reference numeral 3 denotes a circular plate-like casing, and a plurality of sockets 1 are arranged as protruding from the front face 3F.
The number of sockets 1 is the same as the number of tire/wheel nuts of an automobile. That is, each socket 1 corresponds to each tire wheel nut. The example in the figure exemplifies the case of five.

Further, as shown in FIGS. 1 and 2, a manual operation lever 2 is protruded so as to be movable along the outer peripheral edge 3C of the (circular) plate-shaped casing 3. As shown in FIG. An input shaft 6 that can be interlocked and connected to an output rotary cylinder portion 5A of an electric (or pneumatically or hydraulically operated) rotary drive tool 5 protrudes from the rear surface 3B of the flat plate-like casing 3. As shown in FIG.
Specifically, from the center of the circular rear surface 3B, a hexagonal bar-shaped input shaft 6 protrudes rearward, to which the output rotary cylinder portion 5A of the rotary drive tool 5 is connected (separably connected). can.

Then, as shown in FIGS. 1 and 2 and FIGS. 9 to 16 (to be described later), when the manual operation lever 2 is moved along the outer peripheral edge 3C of the casing 3, the socket arrangement pitch circle P ₁ is formed. all-socket radial position simultaneous adjustment means Y for increasing or decreasing the diameter D1 of the wheel nuts to _match the wheel pitch circles of the plurality of wheel nuts.

Here, the structure, shape, etc. of the flat plate-like casing 3 will be specifically described.
1 to 8, the flat-plate-like casing 3 has a circular shallow plate-like first outer plate 11 having a front wall portion 12 and a first outer peripheral wall portion 13 (see FIG. 7). Furthermore, it has a circular shallow dish-shaped second outer plate 15 having a rear wall portion 16 and a second outer peripheral wall portion 17 (see FIG. 5).

A circular intermediate plate 20 that is accommodated in a circular disk-shaped space K formed by the first outer plate 11 and the second outer plate 15 is provided.
With the first outer peripheral wall portion 13 and the second outer peripheral wall portion 17 fitted to each other, a circumferential window portion through which the manual operation lever 2 is radially inserted (as shown in FIG. 2) is provided. 8 is formed.

As shown in FIG. 7, a notch-shaped concave portion 13A is formed in the first outer peripheral wall portion 13 of the first outer plate 11, and further, as shown in FIG. A notched recess 15C having a (square) concave-convex tooth 15A is formed.
Therefore, as shown in FIG. 2, when the first outer plate 11 and the second outer plate 15 are fitted together and united, one side of the circumferential window portion is formed with an uneven tooth portion 15A. A small protrusion 2A at the base of the manual operation lever 2 can be engaged with the uneven tooth portion 15A.

Next, the all-socket radial position simultaneous adjusting means Y will be described below.
As shown in FIG. ₁ , when viewed from one direction X6 of the axis L6 of the input shaft ₆ , the first outer plate 11 and the second outer plate 15 have circular guide grooves of the same shape that appear to overlap each other. 21 is provided through (see FIGS. 4 and 6). Furthermore, a small circular hole 22 is formed through the central point of the circle including the arc of the circular guide groove 21 . The same number of arc-shaped guide grooves 21 and small circular holes 22 are provided corresponding to the number of sockets 1 (five pieces are shown in the figure).

Each arcuate guide groove 21 is inclined at a large angle with respect to a radial line from the center point O ₁₁ of the circle of the first outer plate 11 and the center point O ₁₅ of the circle of the second outer plate 15. is set.
Furthermore, as shown in FIGS. 12 to 16, the intermediate plate 20 has the arc-shaped guide grooves 21 of the first outer plate 11 and the second outer plate 15 when viewed from the one direction L ₆ (see FIG. 1). A slanted guide groove 23 which intersects in the shape of an X is provided through (see FIG. 3).

Then, the shaft portion 10 of the socket 1 is inserted into each of the intersections Om of the arc-shaped guide grooves 21 of the first outer plate 11 and the second outer plate 15 and the inclined guide grooves 23 of the intermediate plate 20. The all-socket radial position simultaneous adjustment means Y adjusts the radial positions of all the sockets 1 simultaneously while aligning each of the axial points O10 of the shaft portions ₁₀ with the intersection point Om. It is configured.

Then, the rotation (rotational torque) of the input shaft 6 is transmitted to (the shaft portion 10 of) the socket 1 via the gear group G ₁₀₀ incorporated in the flat-plate casing 3 .
As shown in FIGS. 8 and 9 to 11, this gear group G ₁₀₀ has the following configuration.
That is, a (large diameter) sun gear G ₁ is fixed to the input shaft 6 . Further, a plurality of small planetary gears G ₂ (five in the examples of FIGS. 9 to 11) are arranged at equal pitches around the sun gear G ₁ .

Further, a socket gear G3 is arranged so as to be fixed to the socket shaft portion ₁₀ to which the socket ₁ is attached and to always mesh with the planetary gear G2. A plurality of socket gears G3 (five in the figure) are arranged in one _- to _- one correspondence with the planetary gears G2.
Thus, in the illustrated embodiment, the gear group _G100 is composed of the sun gear G1 _, the planetary gear _G2 , and the socket gear _G3 .

Moreover, since the socket gear _G3 is fixed and integrated with the socket shaft portion 10, it moves along the arcuate guide groove 21 and moves along the arc-shaped guide groove 21 as already described with reference to FIGS. , the size of the diameter _D1 of the socket _arrangement pitch circle P1.
9, 10 and 11 respectively show cases where the socket arrangement pitch circle P1 is ₁₅₀ mm, 140 mm and 114 mm, and the corresponding states are shown in FIGS. 12, 13 and 15, respectively. .

As explained above, the configuration of the gear group G ₁₀₀ illustrated in FIGS. 8 to 11 and the all-socket radial position simultaneous adjusting means Y illustrated in FIGS. The radial position of the socket ₁ can be freely adjusted corresponding to the arrangement pitch circle P1, and the rotational torque imparted to the single input shaft 6 from the rotary drive tool 5 can be applied to the plurality of socket shaft portions 10. can be smoothly and evenly divided and transmitted.

In the present invention, "tightening" of the wheel nut also includes "temporary tightening". In other words, according to the present invention, after the "temporary tightening" is performed, a step of final tightening with a specified torque using a spanner, torque wrench, or the like may be added. Of course, the present invention can be used not only for "tightening" the wheel nut but also for "detachment" of the wheel nut.

In the present invention, as described in detail above, a plurality of sockets 1 corresponding to a plurality of wheel nuts attached to a tire wheel are arranged so as to protrude from the front surface 3F of the flat-plate casing 3; A manual operation lever 2 is protruded movably along the outer peripheral edge 3C of the plate-shaped casing 3; having a protruding shape from the center; rotating torque of the input shaft 6 is transmitted to the socket ₁ via a gear group G100 incorporated in the flat-plate casing 3; Simultaneous all _- socket radial position adjustment means Y which, when moved along the outer peripheral edge 3C, increases or decreases the diameter D1 of the socket pitch circle P1 to _match the wheel pitch circles of the plurality of wheel nuts. ;Because it is equipped, the wheel nut tightener according to the present invention can operate the manual operation lever 2 at the site where work such as tire replacement is required for a wide variety of automobiles with different wheel pitches D ₁ 9 to 11 and ₁₂ to 16), the wheel pitch D1 can be easily and quickly changed to large, medium, or small. Each socket 1 can be simultaneously fitted to all (a plurality of) wheel nuts having _a wheel pitch D1, and all the wheel nuts can be tightened simultaneously while immediately pressing the switch of the rotary drive tool 5, Alternatively, conversely, all wheel nuts can be loosened simultaneously. Thus, working efficiency is significantly improved.
Furthermore, according to the present invention, _one wheel nut tightening tool can be used for wheels with different wheel pitches D1, so there is _no need to replace tires with different wheel pitches D1. At the work site, the space for storing tools can be narrow, and there is no need to purchase a plurality of fasteners, resulting in great economic advantages.

Further, according to the present invention, the flat-plate-like casing 3 includes; 17; a circular plate-like space K formed by the first outer plate 11 and the second outer plate 15; and the manual operation lever 2 is fixed. and a middle plate 20 provided thereon; with the first outer peripheral wall portion 13 and the second outer peripheral wall portion 17 being fitted to each other, the manual operation lever 2 is radially inserted into the peripheral plate. Since the directional window portion 8 is formed, the thickness of the casing 3 can be reduced, the weight can be reduced, and the structure can be simply formed. It is easy for workers to handle, and work efficiency can be improved.

In addition, the all-socket radial position simultaneous adjusting means Y has, when viewed from the one direction X ₆ of the axis L ₆ of the input shaft 6, the first outer plate 11 and the second outer plate 15 which overlap each other. An arc _- shaped guide _groove 21 is formed through the middle plate 20; An inclined guide groove 23 crossing the 15 arcuate guide grooves 21 in an X shape is provided through; All the sockets 1 are positioned in the radial direction while aligning each of the points O10 of the shaft portion ₁₀ of the socket 1 with each of the points of intersection Om with the inclined guide grooves 23 of the intermediate plate 20. Since it is configured to be adjusted at the same time, the all-socket radial position simultaneous adjusting means Y can adjust the wheel pitch D1 with high precision to the thin casing ₃ with a small thickness dimension, and operates relatively simply and smoothly. I was able to form it freely. In particular, the overall weight is light, the number of parts is not increased, the thickness is small, and the wheel pitch D1 can be smoothly and accurately operated by _an operator's hand.

_The gear group G ₁₀₀ includes: _a sun gear G ₁ fixed to the input shaft 6; and a socket gear G3 fixed to the socket _{shaft 10} to which the socket ₁ is attached and meshing with the planetary gear G2; The radial position of the socket ₁ can be freely adjusted corresponding to the socket arrangement pitch circle P1, and the rotational torque imparted to the single input shaft 6 from the rotary drive tool 5 can be applied to a plurality of socket shaft portions. 10, it can be transmitted while being smoothly divided equally.

REFERENCE SIGNS LIST 1 socket 2 manual operation lever 3 flat casing 3B rear surface 3C outer peripheral surface 3F front surface 5 rotary drive tool 6 input shaft 8 circumferential window
10 Socket shank
11 1st skin
12 Front wall
13 First outer wall
15 Second skin
16 Rear wall
17 Second outer wall
20 middle plates
21 Arc-shaped guide groove
23 Inclined guide groove D ₁ Diameter G ₁ Sun gear G ₂ Planetary gear G ₃ Socket gear G ₁₀₀ gear group K Circular space L ₆ axis O ₁₀ axis center Om Intersection point P ₁ Socket arrangement pitch circle X ₆ One-way Y Simultaneous radial position adjustment for all sockets

Claims (4)

A plurality of sockets (1) corresponding to a plurality of wheel nuts attached to a tire wheel are arranged so as to protrude from the front surface (3F) of a flat-plate casing (3),
A manual operation lever (2) is protruded movably along the outer peripheral edge (3C) of the flat plate-like casing (3),
Furthermore, an input shaft (6) interlockingly connectable to the rotary driving tool (5) is provided so as to protrude from the center of the rear surface (3B) of the flat plate-shaped casing (3),
The rotational torque of the input shaft (6) is transmitted to the socket (1) via a gear group (G ₁₀₀ ) incorporated in the flat-plate casing (3),
When the manual operation lever ( ₂ ) is moved along the outer peripheral edge (3C), the diameter ( _D1 ) of the socket arrangement pitch circle (P1) is increased or decreased, and the wheels of the plurality of wheel nuts are Simultaneous adjusting means (Y) for all socket radial positions to match the pitch circle,
A wheel nut fastener comprising: The flat plate-like casing (3) is
a circular shallow dish-shaped first outer plate (11) having a front wall (12) and a first outer peripheral wall (13);
a circular shallow dish-shaped second outer plate (15) having a rear wall portion (16) and a second outer peripheral wall portion (17);
A middle plate (20) which is housed in a disk-shaped space (K) formed by the first outer plate (11) and the second outer plate (15) and to which the manual operation lever (2) is fixed. and
With the first outer peripheral wall portion (13) and the second outer peripheral wall portion (17) fitted together, the manual operation lever (2) is radially inserted through a circumferential window portion (8). ) is formed thereon. The all-socket radial position simultaneous adjusting means (Y)
Seen from one direction (X ₆ ) of the axis (L ₆ ) of the input shaft ( 6 ), the first outer plate ( 11 ) and the second outer plate ( 15 ) have circles of the same shape overlapping each other. An arc-shaped guide groove (21) is provided through,
Further, the intermediate plate (20) includes the first outer plate (11) and the second outer plate ( ₁₅ ) when viewed from one direction (X6) of the axis (L6) of the input shaft ( ₆ ). ) is provided with an inclined guide groove (23) crossing the arcuate guide groove (21) in an X shape,
A crossing point (Om) between the arc-shaped guide groove (21) of the first outer plate (11) and the second outer plate (15) and the inclined guide groove (23) of the intermediate plate (20). The radial position of all the sockets (1) is adjusted simultaneously while matching each of the axial points (O10) of the shaft ( ₁₀ ) of the socket (1) with each of the Item 2. The wheel nut fastener according to item 2. The gear group (G ₁₀₀ ) is
a sun gear (G ₁ ) fixed to the input shaft (6);
a plurality of planetary gears (G ₂ ) arranged at equal pitches around the sun gear (G ₁ ) and meshing with the sun gear (G ₁ );
From a socket gear (G3) fixed to the socket shaft (10) to which the socket ( ₁ ) is attached and meshing with the planetary gear (G2) _,
4. The wheel nut fastener of claim 1, 2 or 3 configured.

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