JP2022150372A - 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 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 wheel nut 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, a plurality of sockets 51 are arranged to protrude from the front surface 52A of a casing 52, 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. 16 and Patent Document 1), many types of wheel nut fasteners are used in automobile repair shops that need 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 interlockingly connectable to the rotary drive tool protruding from the center of the rear surface of the flat plate-shaped casing; Simultaneous all-socket radial position adjustment means that, when moved along the periphery, increases or decreases the diameter of the socket pitch circle to match the wheel pitch circle 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.

In addition, the all-socket radial position simultaneous adjustment means includes main oblique guide grooves of the same shape overlapping each other extending 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 a main groove crossing the main inclined guide grooves of the first outer plate and the second outer plate in an X shape when viewed from one direction of the axis of the input shaft. an arcuate guide groove extending through; at each of the main intersection points of the main oblique guide grooves of the first and second skins and the main arcuate guide groove of the intermediate plate, the axis of the socket; The radial positions of all the sockets are adjusted simultaneously while each of the axial points of the parts are coincident.

Further, a socket chain wheel is fixed to each of the shaft portions of the plurality of sockets arranged at a predetermined pitch in the circumferential direction when viewed from one direction of the axis of the input shaft, and An endless first chain on which the socket sprocket wheel is interlocked and rotatably suspended; a driving center sprocket fixed to the input shaft; and a driving force transmission chain that interlocks and rotates with the first endless chain. an endless second chain for driving force transmission that suspends a wheel so as to interlock; a plurality of the socket chain wheels arranged at a predetermined equal pitch in the circumferential direction, and the adjacent socket chain wheel A tension chain wheel for applying tension to the first chain was arranged between the .

Also provided is a tension chain wheel radial position simultaneous adjustment means for simultaneously adjusting the radial direction positions of the plurality of tension chain wheel by moving the manual operation lever; the tension chain wheel radial position simultaneous adjustment means is viewed from one direction of the axis of the input shaft, the first outer plate and the second outer plate are provided with auxiliary inclined guide grooves of the same shape overlapping each other; Seen from one direction of the axis of the input shaft, a secondary arcuate guide groove crossing the secondary inclined guide grooves of the first outer plate and the second outer plate in an X shape is provided; Each of the axial points of the tension chain wheel is aligned with each of the sub-intersection points of the sub-slanted guide grooves of the outer plate and the second outer plate and the sub-arc-shaped guide grooves of the intermediate plate. The radial positions of all the tensioning wheels are arranged to be adjusted simultaneously.

Further, a socket pulley is fixed to each of the shaft portions of the plurality of sockets arranged at a predetermined pitch in the circumferential direction when viewed from one direction of the axial center of the input shaft, and all of the above-mentioned A first endless belt on which a socket pulley is interlockingly rotatably suspended; a driving center pulley fixed to the input shaft; a second endless belt for driving force transmission suspended so as to be linked; A tensioning pulley for applying tension to the belt was provided.

Also provided is tension pulley radial position simultaneous adjustment means for simultaneously adjusting the radial direction positions of the plurality of tension pulleys by movement of the manual operation lever; the tension pulley radial position simultaneous adjustment means; When viewed from one direction of the axis of the shaft, the first outer plate and the second outer plate are provided with auxiliary inclined guide grooves of the same shape overlapping each other; A sub-arc-shaped guide groove that crosses the sub-inclined guide grooves of the first outer plate and the second outer plate in an X shape when viewed from one direction of the axis is provided through the first outer plate; Each of the axial points of the tension pulley is aligned with each of the sub-intersecting points of the sub-slanted guide groove of the second outer plate and the sub-arc-shaped guide groove of the intermediate plate, and all of the tension is applied. It is configured to simultaneously adjust the radial position of the pulley for

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. It is a perspective view of the state which removed the 2nd skin. 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 front view of the state which removed the 2nd skin. 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 137 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 124 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 111 mm; FIG. 10 is an explanatory diagram of a main part showing a state corresponding to a wheel pitch of 98 mm; FIG. 10 is a front view of another embodiment of the present invention with the first skin removed; 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 to 3, 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 FIGS. 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.

When the manual operation lever 2 is moved along the outer peripheral edge 3C of the casing ₃ , the diameter D1 of the socket arrangement pitch circle P1 is increased or decreased to _match the wheel pitch circles of the plurality of wheel nuts. An all-socket radial position simultaneous adjustment means Y is provided.

Here, the structure, shape, etc. of the flat plate-like casing 3 will be specifically described.
1 to 12, the flat-plate-like casing 3 has a circular shallow dish-like first outer plate 11 having a front wall portion 12 and a first outer peripheral wall portion 13 . 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 .

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. 8, a notch-shaped recess 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, one side of the circumferential window portion 8 has an uneven tooth portion 15A. A small protrusion 2A at the base of the manual operation lever 2 can be engaged with this concave-convex tooth portion 15A.

Next, the all-socket radial position simultaneous adjusting means Y will be described.
5, 7, and ₂ , when viewed from one direction (rear) X6 of the axis L6 of the input shaft ₆ , the first outer plate 11 and the second outer plate 15 have mutual A main inclined guide groove 21 having the same shape and overlapping with the groove is provided through the groove.

5 and 7, the main inclined guide grooves 21, 21 have the same size (same shape). It is formed short with a large angle of inclination with respect to the radial line from the center points O ₁ and O ₂ of the circle.

In addition, the intermediate plate 20 has an X-shaped groove with respect to the main inclined guide groove 21 of the first outer plate 11 and the second outer plate 15 when viewed from the direction X ₆ of the axis L ₆ of the input shaft 6 . A main arcuate guide groove 22 crossing is provided through.
Here, "X-shaped" indicates the case where a straight line and an arc-shaped line intersect in the illustrated embodiment. It is also free to cross over (not shown).

If the intersection of the main inclined guide grooves 21 of the first outer plate 11 and the second outer plate 15 and the main arcuate guide grooves 22 of the middle plate 20 is called a main intersection point Om, this main intersection point Om , the axial center point O10 of the shaft portion ₁₀ of the socket 1 is aligned.
That is, the all-socket radial position simultaneous adjusting means Y aligns each of the main crossing points Om with each of the axial points O10 of the shaft portion ₁₀ of the socket 1, as shown in FIGS. are configured to simultaneously adjust the radial position of the socket 1.

Then, as shown in FIG. 9, a socket is attached to each of the shaft portions 10 of a plurality of sockets ₁ arranged at a predetermined pitch in the circumferential direction when viewed from one direction X6 of the axis L6 of the input shaft ₆ . A sprocket wheel 23 is fixed, and an endless first chain 31 is suspended on the sprocket wheel 23 so that all the sprocket wheels 23 for sockets can rotate together.
Moreover, between each socket chain wheel 23 arranged at a predetermined pitch in the circumferential direction and the socket chain wheel 23 adjacent thereto, a tension chain wheel is provided in order to apply tension to the first chain 31. 24, are placed.

FIG. 9 illustrates a case in which five socket chain wheels 23 and five tension chain wheels 24 are alternately arranged.
9, the input shaft 6 is fixedly provided with a center chain wheel 25 for driving. A driving force transmitting chain wheel 26 coaxially rotating integrally is fixed to one of the tension chain wheels 24 provided to rotate interlockingly with the endless first chain 31 .

Then, the endless second chain 32 for driving force transmission is suspended so that the chain wheel 26 for driving force transmission interlocks with the center chain wheel 25 . 33 denotes a tensioner for applying tension to the second endless chain 32 for driving force transmission. This tensioner 33 consists of a chain wheel, a spring, and the like.

In the embodiment of FIG. 9, the second chain 32 is suspended on the chain wheel 26 coaxial with the one tension chain wheel 24. The design can be freely changed so that the chain 32 is suspended and the chain wheel 26 is fixed coaxially with the chain wheel 23 for the socket.

Next, a tension chain wheel radial position simultaneous adjustment means Z is provided for simultaneously adjusting the radial position of the plurality of tension chain wheels 24 as the manual operation lever 2 moves (oscillates). , equipped.

The tension chain wheel radial position simultaneous adjusting means Z will be described below.
5, 7, and ₂ , when viewed from one direction (rear) X6 of the axis L6 of the input shaft ₆ , the first outer plate 11 and the second outer plate 15 have mutual A sub-slanted guide groove 41 of the same shape that overlaps is provided through. 5 and 7, the sub-slanted guide grooves 41, 41 have the same shape. It is formed long with a small angle of inclination with respect to the radial line from the center points O ₁ and O ₂ of the circle.

In addition, the intermediate plate 20 has an X-shaped groove with respect to the auxiliary inclined guide groove 41 of the first outer plate 11 and the second outer plate 15 when viewed from the direction X ₆ of the axis L ₆ of the input shaft 6 . Intersecting secondary arcuate guide grooves 42 are provided through.
Here, "X-shaped" indicates the case where a straight line and an arc-shaped line intersect in the illustrated embodiment. It is also free to cross over (not shown).

10 to 14, the point at which the sub-slanted guide groove 41 of the first outer plate 11 and the second outer plate 15 and the sub-arc guide groove 42 of the intermediate plate 20 intersect is defined as a sub-crossing point. Calling the point Os, the axis O24 of the shaft portion 24A of the tension chain wheel ₂₄ is made to coincide with this sub-crossing point Os.

In this way, the radial positions of all the tensioning sprocket wheels 24 are adjusted simultaneously with the movement of the manual control lever 2 (as shown in FIGS. 10-14). An adjustment means Z is constructed.

In further explanation, if FIG. 9 is superimposed on each of FIGS. The sprocket wheel radial position simultaneous adjustment means Z operates simultaneously (so-called interlocking), and cleverly prevents the first endless chain 31 from loosening or (or conversely) receiving excessive tension. In this way, all the sockets 1 can be rotated with equal and sufficient torque, and all the wheel nuts can be tightened simultaneously and reliably.

Next, in another embodiment of the present invention shown in FIG. 15, the chain wheels 23, 24, 25 and 26 in the embodiments of FIGS. ”. A toothed belt is preferable as the belt. In that case, the pulley should be a pulley with uneven teeth.

15 in comparison with FIG. 9, a plurality of sockets ₁ are arranged with a predetermined pitch in the circumferential direction when viewed from one direction X6 of the axis L6 of the input shaft _6. As shown in FIG. A socket pulley 30 is fixed to each of the shafts 10, and an endless first belt 34 that suspends all the socket pulleys 30 so as to be interlockingly rotatable. center pulley 35 and a driving force transmission pulley 36 that rotates interlockingly with the endless first belt 34. A plurality of socket pulleys 30 are arranged at equal pitches, and tension pulleys 57 for applying tension to the first belt 34 are arranged between adjacent socket pulleys 30 .

Also, as shown in FIG. 15, even in the case of the embodiment having the first endless belt 34, the second endless belt 56, and the pulleys 30, 57, 35, all socket radial positions described above A simultaneous adjusting means Y is provided, and a simultaneous tension pulley radial position adjusting means Z' is provided. That is, the configurations of the main inclined guide groove 21, the main arcuate guide groove 22, etc. shown in FIGS. 10 to 14 are applied as they are.

Namely, (as shown in FIGS. 15 and 1 to 14), tension pulley radial position simultaneous adjustment means Z for simultaneously adjusting the radial positions of the plurality of tension pulleys 57 by moving the manual operation lever 2. ' is provided.

The tension _{pulley radial} position simultaneous adjustment means Z' will be described. A sub-slanted guide groove 41 having a shape is provided through it (see FIGS. 5 and ₇ ). A sub-arc-shaped guide groove 42 crossing the sub-slanted guide grooves 41 of the first outer plate 11 and the second outer plate 15 in an X _- shape when viewed from the direction X6 is provided through.

The axis of the tension pulley 57 is located at each of the sub-intersecting points Os of the sub-slanted guide grooves 41 of the first outer plate 11 and the second outer plate 15 and the sub-arc-shaped guide grooves 42 of the intermediate plate 20. The tension pulley radial position simultaneous adjustment means Z' is configured to simultaneously adjust the radial position of all the tension pulleys 57 while aligning them.

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.

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; 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 to increase or decrease the diameter D1 of the plurality of wheel nuts. Since the structure is equipped with means for simultaneously adjusting the radial position of all sockets Y to match the pitch circle, the present invention can be used in the field where work such as tire replacement is necessary for _a wide variety of automobiles with different wheel pitches D1. With this wheel nut tightening tool, the wheel pitch D1 can be easily and quickly changed between large, medium, and small by operating the manual operation lever ₂ (as shown in FIGS. 10 to 14). Each socket 1 can be simultaneously fitted to all (a plurality of) wheel nuts having _a different wheel pitch D1 for each automobile, and all the wheel nuts can be immediately pressed while pressing the switch of the rotary drive tool 5. They can be tightened at the same time, or conversely, all wheel nuts can be loosened at the same time. 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.

Further, according to the present invention, the all-socket radial position simultaneous adjusting means Y is: Seen 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: Main oblique guide _grooves 21 of the _same shape that overlap each other are provided through the middle plate 20; A main arc-shaped guide groove 22 crossing the main inclined guide groove 21 of the second outer plate 15 in an X shape is provided through; 21 and the main arcuate guide grooves 22 of the intermediate plate 20, each of the main intersection points Om of the shaft portion 10 of the socket 1 is aligned with each of the axial points O10 of the shaft portion ₁₀ of the socket 1. Therefore, the all-socket radial position simultaneous adjusting means Y can adjust the wheel pitch D1 with high accuracy for the thin casing ₃ with a small thickness, and can be relatively It was able to be formed as a simple and smooth operation. 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.

A socket chain wheel 23 is attached to each of the shaft portions 10 of the plurality of sockets ₁ arranged at a predetermined pitch in the circumferential direction when viewed from the direction X6 of the axis L6 of the input shaft ₆ . An endless first chain 31 fixed and interlockingly rotatably interlocking with all the socket sprocket wheels 23; a drive center sprocket 25 fixed to the input shaft 6; An endless second chain 32 for transmitting the driving force, in which the first chain 31 and the chain wheel 26 for transmitting the driving force that rotates interlockingly are suspended so as to interlock; Since the tension chain wheel 24 for applying tension to the first chain 31 is arranged between the plurality of socket chain wheels 23 and adjacent socket chain wheels 23, the wheel pitch D ₁ is achieved. When adjusting the size of the first chain, all the socket pulleys 23 are interlocked, and regardless of the need to radially move toward or away from the input shaft 6, the first chain Appropriate tension acts on 31, and it is possible to transmit a rotational force to the socket chain wheel 23 and the socket 1.
Moreover, the driving force is transmitted to the first chain 31 arranged along the outer circumference via the second endless chain 32 and the chain wheel 26 for transmitting the driving force, so that all the chain wheels 23 for sockets and the like are reliably driven. rotational force is transmitted to

Also provided is a tension chain wheel radial position simultaneous adjustment means Z for simultaneously adjusting the radial position of the plurality of tension chain wheel 24 by moving the manual operation lever 2; The adjustment means Z is: when viewed from the direction X6 of the axis _L6 of the input shaft ₆ , the first outer plate 11 and the second outer plate 15 are provided with sub-tilt guide grooves 41 of the same shape overlapping each other. Further, in the intermediate plate 20, when viewed from the one direction X6 of the axis _L6 of the input shaft ₆ , the auxiliary inclined guide grooves 41 of the first outer plate 11 and the second outer plate 15 are provided with A sub-arc-shaped guide groove 42 crossing in an X-shape is provided through; 42, each of the axial points O24 of the tension chain wheels ₂₄ coincides with each of the sub-crossing points Os of the tension chain wheels 24, and the radial positions of all the tension chain wheels 24 are adjusted at the same time. Therefore, when all of the socket pulleys 23 move together with the input shaft 6 in the approaching/separating direction, the tension pulleys 24 equally move the first chain 31 at any point in the circumferential direction. Appropriate tension is applied. As a result, all the socket pulleys 23 and the sockets 1 can be imparted with equal and appropriate rotational torque.

A socket pulley 30 is fixed to each of the shaft portions 10 of the plurality of sockets ₁ arranged at a predetermined pitch in the circumferential direction when viewed from the direction X6 of the axis L6 of the input shaft ₆ . and an endless first belt 34 on which all the socket pulleys 30 are interlocked and rotatably suspended; a driving center pulley 35 fixed to the input shaft 6; An endless second belt 56 for transmission of driving force, on which pulleys 36 for transmitting driving force, which rotate interlockingly with 34, are suspended so as to interlock; Since the tension pulley 57 for applying tension to the _first belt 34 is arranged between the pulley 30 and the adjacent pulley 30 for the socket, when adjusting the wheel pitch D1, Regardless of the fact that all the socket pulleys 30 are interlocked and need to move radially toward and away from the input shaft 6, a moderate tension always acts stably on the first belt 34. , and a torque can be transmitted to the socket pulley 30 and the socket 1 .
Moreover, the driving force is transmitted to the first belt 34 arranged along the outer periphery via the endless second belt 56 and the driving force transmission pulley 36, and all the socket pulleys 30 and the like are reliably rotated. power can be transmitted.

Also provided is tension pulley radial position simultaneous adjustment means Z' for simultaneously adjusting the radial position of the plurality of tension pulleys 57 by moving the manual operation lever 2; the tension pulley radial position simultaneous adjustment means. Z': When viewed from the direction X6 of the axis L6 of the input shaft ₆ , the first outer plate ₁₁ and the second outer plate 15 are provided with auxiliary inclined guide grooves 41 of the same shape overlapping each other. _Furthermore , the _intermediate plate 20 has a A sub-arcuate guide groove 42 crossing in the shape of an X is provided through; and each of the sub-crossing points Os of the tensioning pulleys 57, while simultaneously adjusting the radial positions of all the tensioning pulleys 57. Therefore, all the sockets When the pulley 30 moves in conjunction with the input shaft 6 in the approaching/separating direction, an appropriate tension is evenly applied to any point in the circumferential direction of the first belt 34 by the tension pulley 57. . As a result, all the socket pulleys 30 and sockets 1 can be imparted with equal and appropriate rotational torque.

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 Shaft
11 1st skin
12 Front wall
13 First outer wall
15 Second skin
16 Rear wall
17 Second outer wall
20 middle plates
21 Main inclined guide groove
22 Main arc guide groove
23 Chain wheel for socket
24 Chain wheel for tensioning
25 center chain wheel
26 Drive chain wheel
30 Socket pulley
31 Endless first chain
32 Endless second chain
34 1st endless belt
35 center pulley
36 Drive power transmission pulley
41 Sub-slanted guide groove
42 Secondary arc guide groove
56 Endless second belt
57 Pulley for tension D ₁ diameter K Circular disk space L ₆ axis center O ₁₀ axis center point O ₂₄ axis center point Om Main intersection point Os Sub intersection point P ₁ socket arrangement pitch circle X ₆ one direction Y All socket radial positions Simultaneous adjustment means Z Tension chain wheel radial position simultaneous adjustment means Z' Tension pulley radial position simultaneous adjustment means

Claims (7)

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),
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-shaped 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)
When viewed 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 main bodies of the same shape overlapping each other. An inclined 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 ). ), a main arc-shaped guide groove (22) crossing the main inclined guide groove (21) in an X-shape is provided through,
A main crossing point (Om ), each axial point (O ₁₀ ) of the shaft portion (10) of the socket (1) is aligned with each of the sockets (1), and the radial positions of all the sockets (1) are adjusted simultaneously. A wheel nut fastener according to claim 2. Each of shaft portions (10) of a plurality of sockets ( ₁ ) arranged at a predetermined pitch in the circumferential direction when viewed from one direction (X6) of the axis (L6) of the input shaft ( ₆ ) an endless first chain (31) on which socket pulleys (23) are fixed and all of the socket pulleys (23) are interlockably rotatably suspended;
The driving center chain wheel (25) fixed to the input shaft (6) and the driving force transmission chain wheel (26) rotating interlockingly with the endless first chain (31) are interlocked. a suspended second endless chain (32) for transmission of driving force,
A plurality of the socket chain wheels (23) arranged with a predetermined equal pitch in the circumferential direction and a tensioning device for applying tension to the first chain (31) between the adjacent socket chain wheels (23). 4. A wheel nut fastener according to claim 3, further comprising a chain wheel (24). a tension chain wheel radial position simultaneous adjustment means (Z) for simultaneously adjusting the radial positions of the plurality of tension chain wheels (24) by moving the manual operation lever (2);
The tension chain wheel radial position simultaneous adjustment means (Z) is
When viewed 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 auxiliary slopes of the same shape overlapping each other. A guide groove (41) 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 ). ), a sub-arc-shaped guide groove (42) crossing the sub-slanted guide groove (41) in an X-shape penetrates,
A secondary crossing point (Os ), each axial point (O ₂₄ ) of the tension chain wheel (24) is aligned with each of the tension chain wheels (24), and the radial positions of all the tension chain wheels (24) are simultaneously adjusted. Item 5. The wheel nut fastener according to item 4. Each of the shaft portions (10) of the plurality of sockets ( ₁ ) arranged at a predetermined pitch in the circumferential direction when viewed from one direction (X6) of the axis (L6) of the input shaft ( ₆ ) an endless first belt (34) on which the socket pulleys (30) are fixed and all of the socket pulleys (30) are suspended so as to be interlockingly rotatable;
A driving center pulley (35) fixed to the input shaft (6) and a driving force transmission pulley (36) rotating interlockingly with the endless first belt (34) are suspended so as to interlock with each other. Equipped with an endless second belt (56) for driving force transmission,
Tension pulleys ( 57). a tension pulley radial position simultaneous adjustment means (Z') for simultaneously adjusting the radial positions of the plurality of tension pulleys (57) by moving the manual operation lever (2);
The tension pulley radial position simultaneous adjustment means (Z') is
When viewed 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 auxiliary slopes of the same shape overlapping each other. A guide groove (41) 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 ). ), a sub-arc-shaped guide groove (42) crossing the sub-slanted guide groove (41) in an X-shape penetrates,
A secondary crossing point (Os 7. The wheel nut according to claim 6, wherein the axial positions of the tensioning pulleys (57) are aligned with each of the tensioning pulleys (57), and the radial positions of all the tensioning pulleys (57) are simultaneously adjusted. fasteners.

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