KR100902919B1 - Clamp for wheel alignment measuring machines - Google Patents

Abstract

The present invention relates to a clamp for a wheel alignment measuring instrument, the clamp head (10) having a through hole (11) formed in the center and a locking groove (12) provided on the inner circumferential surface of the lower end portion; Spiral rotating body 20 is formed through the through hole 11 of the clamp head 10, the head portion 21 is caught by the inlet of the through hole 11 and the thread 22a is formed on the outer surface of the body portion 22. ; Helix moving body having a conical surface 32 is formed in the center so that the screw fastening hole 31 is formed in the center so as to be screwed with the body portion 22 of the spiral rotating body 20 and the outer peripheral surface is smaller as the clamp head 10 30; The outer circumferential surface of the spiral movable body 30 is enclosed, and a hooking protrusion 41 is formed at each end of the helical movable body 30 to be inserted into the locking groove 12 of the clamp head 10. A plurality of clamping members 40 formed with an inclined surface 42 in close contact with the conical surface 32 and having clamping portions 43 fixed at the other end of the tire wheel w or in the center hole of the axle drum therein; And it is installed to surround the outer surface of the plurality of clamping members 40, the clamping member 40 is configured to include a ring-shaped elastic bundle member 50 to elastically support the expansion and contraction radially.

Therefore, the configuration is simple, so the production is easy and the manufacturing cost is greatly reduced, and the mounting on the tire wheel is also quick and easy, which makes the operation simple, and the clamping member is radially concentric and the clamping is performed, so the measurement is accurately measured. The effect of improving the precision of a measuring instrument is acquired.

Wheel Alignment Meter, Clamp, Helical Rotator, Jamming Part, Conical Surface, Guide Boss

Description

Clamp for wheel alignment measuring machines

The present invention relates to a clamp for a wheel alignment measuring instrument, and more particularly, for a wheel alignment measuring instrument which enables the wheel alignment measuring instrument to be attached in a measurable state after being quickly and easily clamped regardless of a tire wheel or axle drum material. Relates to the clamp.

In general, wheel alignment measurement is to find out what angles the components of the suspension or steering system are mounted on the vehicle. Specifically, the camber refers to the angle formed by the center line of the road surface and the wheel when viewed from the front when the car is placed on a horizontal road surface, and the caster refers to the angle between the vertical line of the road surface and the tire support shaft when the front wheel of the car is viewed from the side, and the vehicle When viewed from the front includes a kingpin inclination angle and the like referred to the angle between the vertical line of the road surface and the tire support shaft.

The wheel alignment measuring instrument, also called camber caster gauge, is used to measure the camber, caster, and king pin inclination angle to check the alignment of the wheel.

Since the wheel alignment gauge is easily attached to a magnetic body when a tire wheel or axle drum is made of iron metal, the tire alignment state is directly attached to the tire wheel using only a magnet without the need for a connection mechanism such as a clamp. Could be measured.

However, in recent years, since most of the tire wheels are made of aluminum, which is a non-ferrous metal having excellent strength, it is impossible to attach the measuring instrument to the tire wheel using only magnetic force, and thus a separate connecting mechanism, a clamp, is needed.

A clamp related to this technique is presented in Korean Patent No. 571530, which is a configuration in which a pair of wheel engaging bars having a pair of engaging projections spread to both sides are disposed on both sides of the transfer bar, and a measuring instrument base is installed at the center thereof. The bar was mounted on the transfer bar by sliding the wheel coupler on the diagonal ends across the diameter of the tire wheel, and then the wheel alignment meter was mounted on the clamp holder to measure the alignment of the tire.

However, in the clamp of the prior art wheel alignment measuring instrument, a pair of wheel couplers having a pair of engaging projections spread on both sides are arranged on both sides of the transfer bar, and a measuring instrument stand is installed at the center thereof, which is quite complicated. Difficult to produce, of course, there was a problem that takes a lot of production costs.

In addition, the four coupling protrusions provided on the wheel coupling stand must be fixed to the outer circumferential surface of the tire wheel, so that the fixing work is difficult and the fixing state may not be accurate. There was a problem that the precision is reduced.

An object of the present invention has been researched and developed in order to solve the above-mentioned conventional problems, the configuration is simple by providing a structure in which a plurality of clapping member is radially opened and retracted by the operation of the spiral rotating body. It is easy to manufacture and the manufacturing cost is greatly reduced, and it is also quick and easy to install on the tire wheel or axle drum, which makes the operation simple and at the same time, the clamping member is radially concentric and the clamping work is performed, so the measurement is accurately measured It is to provide a clamp for the wheel alignment instrument to improve the accuracy of the.

Clamp for a wheel alignment measuring instrument according to the present invention for achieving the above object is a clamp head having a through hole is formed in the center and the engaging groove is provided on the inner side of the lower end; A spiral rotating body which penetrates the through-hole of the clamp head and is caught by the inlet of the through-hole, and a thread is formed on an outer surface of the body portion; A spiral moving body having a spiral fastening hole formed at a center thereof so as to be screwed with the trunk portion of the spiral rotating body, and having a conical surface smaller as the outer circumferential surface is closer to the clamp head; The outer circumferential surface of the spiral movable body is enclosed, and each end is provided with a locking protrusion which is inserted into the locking groove of the clamp head, and an inclined surface that is in close contact with the conical surface of the spiral movable body is provided on the central inner circumferential surface, and the tire wheel or the inner side thereof is provided at the other end thereof. A plurality of clamping members having clamping portions fixed at the center holes of the axle drums of the plurality of clamping members; And an elastic bundle member installed to surround the outer circumferential surfaces of the plurality of clamping members to elastically support the clamping member radially stretched.

In the clamp for wheel alignment measuring device according to the present invention, between the clamp head and the spiral moving body, an elastic support member disposed on the outer side of the trunk portion of the spiral rotating body to elastically support the spiral moving body, that is, a compression coil spring or a cylindrical rubber It is preferred to be provided.

In the clamp for a wheel alignment measuring instrument according to the present invention, it is preferable that an anti-shake means is provided so as not to shake even when the spiral moving body is moved in the longitudinal direction by the spiral rotating body. The anti-shake means comprises a guide tube extending in the axial direction inside the clamp head, and a guide boss formed to be in close contact with the outer peripheral surface of the guide tube at the end of the spiral movable body.

In addition, in the clamp for wheel alignment measuring device according to the present invention, the spiral rotating body is characterized in that the head is extended so as to install a bracket box for receiving and mounting a digital wheel alignment measuring instrument.

In the clamp for a wheel alignment measuring instrument according to the present invention, it is preferable that the measuring instrument connection portion is further provided to protrude from the end of the clamp head and has a receiving groove so that the head of the spiral rotating body is accommodated in the center thereof.

In addition, in the clamp for wheel alignment measuring instrument according to the present invention, the clamping member is the engaging protrusion is opened to the outside and the other end is narrowed inward and then the inclined surface is opened to the outside is smaller from the inclined end to the clamping portion to the inside It is preferable to have a zigzag shape.

It is characterized in that the mounting groove portion for seating so that the elastic bundle member is not separated from the bent portion leading to the clamping portion in the inclined surface of the outer peripheral surface of each clamping member.

The inner peripheral surface of the bent portion corresponding to the seating grooves of the respective clamping members may be caught by a spiral moving member so that a stopper protrusion protruding from the clamping member may be protruded.

It is preferable that the clamping parts of the respective clamping members are provided in a shape that protrudes sharply outward so as to be firmly gripped in the center hole of the tire wheel.

Preferably, the clamping members are provided to combine three or more to form a single cone shape.

Preferably, the locking protrusion of each clamping member has a structure that is separably hung from the locking groove of the clamp head.

As described above, the clamp for the wheel alignment measuring instrument according to the present invention has a structure in which the clamping member is radially opened and retracted by the operation of the spiral rotating body, so that the configuration is simple, the production is simple, and the manufacturing cost is simple. In addition, it can be greatly reduced, and it is also quick and easy to mount on tire wheels or axle drums, which simplifies the operation, while clamping members are radially concentric and clamping is carried out, so that the measurement accuracy can be accurately measured while improving the accuracy of the instrument. Gets the effect.

Hereinafter, the clamp for the wheel alignment measuring instrument of the present invention will be described in detail.

1 to 3 are diagrams showing the clamp for the analog wheel alignment measuring instrument according to an embodiment of the present invention, Figure 4 is a state in which the analog wheel alignment measuring instrument mounted on the axle drum using the clamp of the present invention Figure 5a is a cross-sectional view for explaining the initial installation step of the clamp according to the present invention as shown in Figure 4, Figure 5b is axle drum with the clamping member of the clamp according to the present invention as shown in Figure 4 This is a cross-sectional view showing the clamping on.

As shown in the figure, the clamp for wheel alignment measuring instrument of the present invention has a clamp head 10 having a through hole 11 formed in the center and a locking groove 12 formed along the entire inner circumferential surface of the lower end, and the clamp head 10. A spiral rotating body 20 penetrating through the through hole 11 of the spiral rotating body, the spiral moving body 30 spirally moving on the spiral rotating body 20, and a plurality of radially extending and contracted in accordance with the movement of the spiral moving body 20; And a clamping member 40 and an elastic bundle member 50 that elastically supports the outer circumferential surface of the clamping members 40.

The clamp head 10 is provided in a two-stage cylindrical shape of upper and lower beams in which a donut-shaped measuring instrument connecting portion 14 is provided on a cylindrical shape in which a bottom is concave, and a spiral rotating body 20 penetrates in the center thereof. A hole 11 is formed and a locking groove portion 12 is formed to be concave so as to catch the locking protrusion 41 of the clamping member 40 along the entire inner circumferential surface of the lower portion, and in the center of the measuring instrument connecting portion 14. An accommodation groove 14a for accommodating the head portion 21 of the spiral rotating body 20 is formed.

In addition, the upper end of the through-hole 11 of the clamp head 10 in the axial direction to guide the movement of the guide boss 33 in close contact with the inner peripheral surface of the guide boss 33 of the spiral movable body 30. An extended tubular guide tube body 13 is provided.

The spiral rotating body 20 penetrates the through hole 11 of the clamp head 10 so that the head portion 21 is caught by the outer circumferential surface of the through hole 11 and the thread 22a is attached to the outer circumferential surface of the body portion 22. Is formed in a long bolt shape, the upper surface of the head portion 21 is formed with a hand tool insertion hole 21a for inserting a hand tool (not shown) for rotating the spiral rotating body 20 with a wrench or the like, and In addition, a separate support pin 70 is mounted on the lower end portion of the trunk portion 22 that is penetrated in the state of being screwed with the spiral fastening hole 31 of the spiral mover 30 so that the trunk portion 22 is the spiral mover 30. Pin mounting hole 23 is further formed to prevent the departure from.

Reference numeral 72 prevents the detachment of the spiral rotating body 20 from the body portion 22 in which the head portion 21 of the spiral rotating body 20 is seated in the receiving groove 14a of the clamp head 10. It is a support pin provided at the end of the body portion 22. Since the support pin is sufficient to prevent separation of the spiral rotating body 20, a neck portion may be provided at the end of the body portion, and the neck may be provided with a snap ring of a mold or a mold.

The spiral moving body 30 has a spiral fastening hole 31 formed at the center thereof so as to be screwed with the trunk portion 22 of the spiral rotating body 20, and the outer peripheral surface thereof becomes smaller toward the clamp head 10. It has a conical surface 32, the end of the conical surface 32 is a conical shape formed with a guide boss 33 which is guided to move in close contact with the outer peripheral surface of the guide tube (13).

The clamping member 40 is wrapped around the outer circumferential surface of the spiral moving body 30, each end is formed with a locking protrusion 41 is inserted into the locking groove portion 12 of the clamp head 10, the inner side of the center The main surface is provided with an inclined surface 42 in close contact with the conical surface 32 of the spiral movable body 30, and the other end is formed of a plurality of pieces formed with a clamping portion 43 is inserted into the center hole of the tire wheel (w) and fixed. It is composed.

In particular, the locking protrusion 41 of each clamping member 40 is provided to be detachably hung from the locking groove 12 of the clamp head 10, the clamping members 40 are combined four pieces When you have a stable cone shape.

Here, when the clamping members 40 are described in more detail, the locking protrusions 41, which are one end thereof, spread outward toward their inner surfaces so as to be caught by the locking grooves 12 of the clamp head 10, and the other end thereof. As the direction of the inclined surface becomes narrower, the inclined surface 42 is opened out to correspond closely to the conical surface 32 of the spiral moving body 30, and is narrowed inwardly from the end of the inclined surface 42 to the clamping portion 43. It is provided in a zigzag shape.

A seating groove 44 for preventing the elastic bundle member 50 from being separated from the clamping member 40 is formed at the bent portion leading from the inclined surface 42 to the clamping portion 43 among the outer peripheral surfaces of the respective clamping members 40. Formed. The seating groove 44 is sufficient if the elastic bundle member 50 is not detached even if the clamping member 40 is extended or contracted radially, so that the shape corresponding to the elastic bundle member 50 and the cross-sectional shape, for example For example, it is formed in a round shape or the like.

In addition, the stopper 45 is formed on the inner circumferential surface of the bent portion corresponding to the seating groove 44 of each of the clamping members 40 to protrude inward from the lower outer circumferential edge of the spiral movable body 30. Since the stop protrusion 45 is not moved by the spiral moving body 30, the clamping member 40 restricts the lifting and falling of the spiral moving body 30.

The clamping portion 43 of each clamping member 40 protrudes sharply toward the inner circumferential surface of the tire wheel w or the axle drum so as to be easily fixed to the inner circumferential surface of the center hole of the tire wheel w. Preferred shapes are preferred.

The elastic bundle member 50 is seated in the seating groove 44 assembled in a cylindrical shape by the plurality of clamping members 40 to prevent the clamping member 40 from being separated and separated while the clamping member 40 radially. Resilient support even as it expands and retracts. Therefore, the good elasticity is sufficient, it is preferable to be provided with a tension coil spring, rubber ring or the like.

Between the clamp head 10 and the spiral movable body 30 is disposed in the guide tube 13 while being fitted to the outside of the body portion 22 of the spiral rotating body 20, the spiral movable body 30 with respect to the clamp head 10 The elastic support member 60 is installed to support the elastically as well as to prevent idle rotation of the spiral rotating body 20. As the elastic support member 60, a compression coil spring or a dish spring may be preferable.

The assembly process of the wheel alignment measuring instrument clamp according to the present invention configured as described above will be described.

First, the elastic support member 60 is inserted into the guide tube body 13 of the clamp head 10 and installed to cover the guide boss 33 of the spiral movable body 30 on the outside of the guide tube body 13. The spiral rotating body 20 is penetrated through the through hole 11 of the clamp head 10. At this time, while the head portion 21 of the spiral rotating body 20 is accommodated in the receiving groove 14a, the body portion 22 penetrates the elastic support member 60 so that the end portion of the body portion 22 is the spiral movable body. It is coupled to the spiral fastening hole 31 of the spiral (30) but the end of the spiral rotating body 20 passes through to protrude to the outside of the spiral movable body (30). Thereafter, the support pin 70 is assembled such that the spiral moving body 30 is not separated from the spiral rotating body 20 by the pin mounting hole 23 formed at the end of the trunk portion 22 of the spiral rotating body 20. .

In this state, the clamping member 10 is inserted into the locking groove 12 of the clamp head 10 and the four clamping members 40 are temporarily assembled in contact with the outer peripheral surface of the spiral movable body 30, and then the respective clamping members 40 The assembly of the clamp is completed by installing the ring-shaped elastic bundle member 50 with the seating groove 44 formed on the outer circumferential surface thereof.

It looks at the process of measuring the alignment state of the tire (t) to be measured using the clamp thus assembled. First, as shown in FIG. 5, when the spiral rotating body 20 is rotated by using a separate hand tool, the spiral moving body 30 is advanced forward and thus the conical surface 32 and the clamping member of the spiral moving body 30 are rotated. By the sliding action between the inclined surfaces 42 of the 40, the clamping members 40 are contracted radially with respect to each other with the locking protrusion 41 as the axis, and the clamping portion 43 of the tip portion thereof is also retracted. At this time, the degree of shrinkage of the clamping portion 43 is a diameter slightly smaller than the center hole of the axle drum on which the tire wheel w is mounted.

Subsequently, when the spiral rotating body 20 is reversely rotated by using a separate hand tool, the spiral moving body 30 is pulled, and thus the inclined surface 42 of the conical surface 32 and the clamping member 40 of the spiral moving body 30 are pulled out. As the clamping members 40 extend radially with respect to each other with the locking protrusion 41 as the axis by the sliding action between the two ends, the clamping portion 43 of the tip portion thereof is shown in FIG. It is fixed to the inner peripheral surface of the center hole of the inner axle drum. In this state, a measurement operation is performed after connecting and installing a separate analog measuring instrument (g1) by using the permanent magnet provided in the analog measuring instrument (g1) to the measuring instrument connecting portion (14) of the clamp head (10). Just do it.

As described above, the clamp of the present invention is used to simply and easily mount the clamp on the axle drum or the tire wheel w inside the tire wheel w of the vehicle, and then immediately attach the analog measuring instrument g to the clamp. Measurements can be performed quickly and accurately.

 6 and 7 are cross-sectional views for explaining a digital wheel alignment measurement clamp according to another embodiment of the present invention. Except for extending the head portion 21 of the spiral rotating body 20 is the same configuration as the clamp of one embodiment. An extension portion of the head portion 21 may be formed with a hexagonal surface portion or a cross-shaped groove so that the spiral rotating body 20 can be rotated by a wrench, a driver, or the like, which is a hand tool.

A bracket box 25 for accommodating and mounting a digital wheel alignment measuring instrument g2 is installed at a portion extending from the head 21. The bracket box 25 is a clamp of the present invention, a tire wheel w or an axle. It is installed through a bearing or a bushing so as to be located in a static state without being rotated even if it is mounted on a drum and the bracket box 25 is provided with a digital wheel alignment measuring instrument g2.

In more detail, the clamp of the present invention is installed on four tire wheels (w) or axle drums, which are the front wheels and the rear wheels of an automobile, and the bracket box 25 extends from the spiral rotating body 20 of each clamp. ), Then install a digital wheel alignment instrument (g2), but connect it to the computer on which the measurement program is installed. In this state, when the computer's measurement program is executed, accurate wheel alignment can be measured through a digital wheel alignment measuring instrument g2 installed on each tire wheel w or axle drum.

The present invention can be usefully used in the field of installing a measuring instrument on the tire wheel or the axle drum to which the tire wheel is mounted for accurate measurement of the wheel alignment with respect to the axle of the vehicle.

1 is a perspective view showing a clamp for a wheel alignment measuring instrument according to an embodiment of the present invention;

2 is an exploded perspective view of FIG. 1;

3 is a cross-sectional view of FIG.

4 is a schematic view showing a state in which an analog wheel alignment measuring instrument is mounted on a tire wheel using the clamp of the present invention;

Figure 5a is a cross-sectional view shown for explaining the initial installation step of the clamp according to the invention as shown in FIG.

Figure 5b is a cross-sectional view showing that the clamping on the tire wheel in the clamping member of the clamp according to the present invention as shown in Figure 4,

6 is a cross-sectional view showing a clamp for a wheel alignment measuring instrument according to another embodiment of the present invention;

FIG. 7 is a side view of a digital wheel alignment measuring instrument installed in the clamp of FIG. 6. FIG.

<Description of the symbols for the main parts of the drawings>

10: clamp head 11: through hole 12: locking groove

13: Guide body 14: Instrument connection part 14a: receiving groove

20: spiral rotating body 21: head portion 21a: rotary hole insertion hole

22: Body 22a: Screw 23: Pin Mounting Hole

30: spiral moving body 31: spiral fastening 32: cone surface

33: guide boss 40: clamping member 41: locking protrusion

42: slope 43: clamping portion 44: seating groove portion

45: stopper 50: expansion and contraction member 60: elastic support member

70: support pin 72: support ring g: measuring instrument

t: tire w: tire wheel

Claims (11)

A clamp head 10 having a through hole 11 formed in a center thereof and a locking groove 12 provided on an inner circumferential surface of a lower end thereof; The spiral rotating body 20 which penetrates the through-hole 11 of the clamp head 10 and the head portion 21 is caught by the inlet of the through-hole 11 and the thread 22a is formed on the outer surface of the body portion 22. ); Helix moving body having a conical surface 32 is formed in the center so that the screw fastening hole 31 is formed in the center so as to be screwed with the body portion 22 of the spiral rotating body 20 and the outer peripheral surface is smaller as the clamp head 10 30; The outer circumferential surface of the spiral movable body 30 is enclosed, and a hooking protrusion 41 is formed at each end of the helical movable body 30 to be inserted into the locking groove 12 of the clamp head 10. A plurality of clamping members 40 formed with an inclined surface 42 in close contact with the conical surface 32 and having clamping portions 43 fixed at the other end of the tire wheel w or in the center hole of the axle drum therein; And Is installed to surround the outer surface of the plurality of clamping members 40, the clamping member 40 for the wheel alignment measuring instrument, characterized in that it comprises a ring-shaped elastic bundle member 50 for elastically supporting the expansion and contraction radially clamp. The method of claim 1, Wheel alignment measuring instrument, characterized in that between the clamp head 10 and the spiral movable body 30 is further provided with an elastic support member 60 is installed to surround the outer surface of the body portion 22 of the spiral rotating body 20 Clamps. The method according to claim 1 or 2, The lower end of the clamp head 10 is provided with a guide tube 13 protruding in the axial direction, and at the end of the conical surface 32 of the spiral movable body 30 corresponding to the outer peripheral surface of the guide tube 13 and Clamp for a wheel alignment measuring instrument, characterized in that the guide boss 33 is guided in a wrapped state while being in close contact. The method of claim 1, Wheel alignment measuring instrument, characterized in that the meter connecting portion 14 is provided with a projection groove 14a protruding from the upper end of the clamp head 10, the center portion 21 of the spiral rotating body 20 is accommodated therein. Clamps. The method of claim 1, The clamping member 40 is narrowed toward the other end from the engaging protrusion 41, which is one end, and then the inclined surface 42 is opened outwards, and from the end of the inclined surface 42 to the clamping portion 43 inwardly. A clamp for wheel alignment measurement, characterized by a narrowing zigzag shape. The method of claim 1, Wheel alignment measuring instrument, characterized in that the seating groove 44 for seating the elastic bundle member 50 is formed in the bent portion leading from the inclined surface 42 to the clamping portion 43 of the outer peripheral surface of each of the clamping members 40 Clamps. The method of claim 6, Clamp for wheel alignment measuring instrument, characterized in that the stopper (45) is formed to protrude on the inner circumferential surface of the bent portion corresponding to the seating groove 44 of each clamping member (40). The method of claim 1, Clamping portion 43 of each clamping member 40 is a wheel alignment measuring instrument clamp, characterized in that protruded sharply outward. The method of claim 1, The clamping member (40) is a wheel alignment measuring instrument clamp, characterized in that the conical shape is achieved by combining the four pieces. The method of claim 1, Clamping member for the wheel alignment measuring instrument, characterized in that the engaging protrusion 41 of each clamping member 40 is supported detachably in the engaging groove 12 of the clamp head (10). The method of claim 1, The spiral rotating body 20 is a wheel alignment measuring instrument, characterized in that the head portion 21 is elongated to install a bracket box 25 for accommodating and mounting a digital wheel alignment measuring instrument (g2). clamp.

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