JPH0350132B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a test object fastener for a balance tester.

According to German Published Application No. 2807343:
As a test object fastener in a balance tester,
A movable fastener base body holding a spring-loaded rocking lever is provided, a connection is made between the fastener base body and the spindle via the rocking lever, and a rocking base body is provided with a movable fastener base body holding a spring-loaded rocking lever. It has become known that a handle is attached perpendicular to the surface of the moving lever. Due to the construction of the rocker lever, the height of the movable clamping element base is very high, so that, for example, in the case of an aluminum rim, the advantages of a rocker lever with a screw cannot be retained. Furthermore, since a handle is provided, complicated operations are required.

Another test object fastener (German Published Application No.
2935216 or Japanese Unexamined Patent Publication No. 56-36031) is based on the above-mentioned publication, the swing lever on one side is provided with a threaded part and an operating means, and the swing lever on the other side is They are configured to engage with each other. As mentioned above, this device has two rotating shafts for its operation.
It is necessary to allow swing levers that engage with each other to swing. Furthermore, a handle must be provided so that the swinging lever moves relative to the handle.

In the known device, due to the spring loading of the internal thread, extra force is required to fit the fastener onto the threaded guide shaft until it engages with the member to be clamped.

Also, due to the forced ratcheting action, the clamping means, clamping spindle and clamping nut are subject to additional wear. Moreover, if the spring-loaded rocking lever breaks, there is no security against loosening of the fasteners, either during driving of the part to be tested or during its braking.

The purpose of this invention is to eliminate the need to forcibly compress the spring by pressing the operating lever with both hands, without reducing safety due to wear of additional parts including the spring, as in conventional fasteners. No manual operation required, easy one-handed operation via threaded guide shaft.
An object of the present invention is to provide a test object fastener for a balance tester.

The above-mentioned purpose is to provide a hollow cylindrical clamping body with a diametrical shaft hole in the upper part, openings cut out on both sides at intervals from the shaft hole, and a curved gripping part. a pair of operation levers each having a fixed end and an integrally molded female thread portion that can enter and exit the inside of the tightening body through an opening in the tightening body; The forks at each end are overlapped, and the overlapping parts are connected with a pin from the upper shaft hole of the main body to form a rotating shaft, and when the operating lever is turned downward via the rotating shaft, the female threaded part is inserted into the inside of the main body. This is achieved by engaging the screw of the test object guide shaft, and turning left and right to cause the engaging screw portion to spiral and tighten the test object.

According to the invention, due to the single common rotation axis,
There is no need to provide additional auxiliary means such as springs, and therefore no space needs to be provided inside the fastener for accommodating such means. Further, in the present invention, since an additional gripping portion is provided on the operating lever, tightening work can be performed with one hand.

The fastener of the present invention is not limited to use in a balance tester, but can also be used in a tire mounting device if the operating lever is formed into a stable shape that can withstand rough operations. When this fastener is used in a tire mounting device, the thread pitch must be adjusted, unlike when used in a fastener balance test, where the internal threads must be adjusted to correspond to the thread pitch itself. There is no need to take it into consideration.

The present invention will be explained in detail below based on the drawings.

In the drawings, FIG. 1 is a partially cutaway side view of a fastener of the present invention having a base body and an operating lever;
2 is a plan view of the fastener shown in FIG. 1, and FIG. 3 is a diagram showing the structure of the operating lever.

Identical components are provided with the same reference numerals throughout FIGS. 1-5. The fastener for fixing the member to be subjected to the balance test on the threaded guide shaft attached to the upper part of the balance tester shown in FIG. Operation levers 2 and 3 are swingably mounted. In this embodiment, the axes 5 of the operating levers 2, 3,
6 (see FIG. 2) extends perpendicularly to the rotating shaft 4 and to the guide shaft axis 7 (see FIG. 1). As is clear from FIG. 2, the axes 5, 6 of the operating levers 2, 3 extend parallel to each other. However, even if the axes 5, 6 do not extend perpendicularly to the guide shaft axis 7, and if the axes 5, 6 do not extend perpendicularly to the rotating shaft 4, they are within the protection scope of the present invention.

In the embodiment, by shifting the operating levers 2, 3 (see FIG. 2), additional gripping parts 8, 9 can be formed on the operating levers 2, 3. In this way, the grip part 8 added during one-handed operation,
By grasping the handle 9 and swinging the operating levers 2 and 3 upward about the rotating shaft 4, the female threaded portions 10 and 11 can be moved outward from the inside of the main body 1. In this state, the entire clamping device is guided along the axis 7 of the guide shaft 13 of the balance tester until the other side 12 of the body 1 comes into contact with, for example, the schematically illustrated rotating body 14 to be subjected to the balance test.
When the fastener is installed, the female threaded portions 10 and 11 engage with the thread of the guide shaft 13 due to the weight of the operating levers 2 and 3. To tighten the rotating body 14, rotate the operating lever in the direction of the arrow until the rotating body 14 is fixed.

The operating lever 2 shown in FIG.
It is integrally formed with. The free end 15 of the actuating lever 2 is provided with a material bulge 16 which serves as a preparation for material removal during the balancing of the clamp. When using this tightening tool for a balance test of the rotating body 14, if the clamp nut rotates during measurement, it is considered to be unbalanced when not being balanced, so it must be installed first. It is necessary to perform a balance test on the fastener itself before doing so.

An internally threaded portion 11 integrally formed with the operating lever 2
is shifted by a half pitch with respect to the female threaded portion of the operating lever 3. Therefore, a smooth contact surface (pressing surface) 12 is formed on the front side of the rotating body 14. Main body 1
, by means of a fork-shaped member 17 (see also FIG. 2), which is also formed integrally with the operating lever 2.
The operating lever 2 is held at an angle of 180°, so that the operating lever 2 is inserted into the hole 18,1 provided in the fork-shaped member 17.
9 can be guided to the pins 20, 21 on which the axis of rotation 4 extends. At the same time, the operating lever 3 is also guided through the hole to the same pin containing the rotating shaft 4.

The internal threads 10 and 11 can be inserted into the main body 1 through openings 22 and 23 provided in the main body 1. At the same time, the edges 24 and 25 constitute a stopper for the operating lever, and thereby the female threaded portion 1
0 and 11 are prevented from penetrating too deeply into the interior of the main body 1.

Furthermore, the body 1 is provided with an annular groove 26 (see FIG. 1). This annular groove cooperates with an intermediate member (not shown) to prevent the rotating body 14 to be subjected to a balance test from being clamped by the contact surface 12 of the main body 1.
An intermediate member that engages with the rotary shaft allows it to be fixed at a considerable distance from the rotation axis.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a front view of an operating lever according to the present invention. 4 is a sectional view taken along the line - in FIG. 2, and FIG. 5 is a sectional view taken along the line - in FIG. 4. 1 is the main body, 2 and 3 are the operating levers, 4 is the rotation axis,
8 and 9 are gripping parts, 10 and 11 are internally threaded parts, 13 is a guide shaft, 14 is a rotating body, and 22 and 23 are openings.

Claims (1)

[Claims] 1 Diameter shaft holes 18 and 19 are provided in the upper part, and openings 22 and 23 are provided on both sides at intervals from the shaft holes.
A hollow cylindrical tightening body 1 with a cutout and a lower surface 12 that tightens the test object 14, and curved gripping parts 8, 9.
a female threaded portion 10 that has a fixed end and can enter and exit the tightening body through openings 22 and 23 of the tightening body;
11 are integrally molded, the gripping parts 8 and 9 of the operating levers are opposed to each other by sandwiching the upper part of the tightening body 1, and the forks 17 at the ends thereof are overlapped, and the forks 17 are overlapped. are connected by pins 20, 21 from the upper shaft holes 18, 19 of the main body to form a rotating shaft 4, and the operating levers 2, 3 are connected to the rotating shaft 4.
When the female threads 10, 11 are inserted into the inside of the main body and engaged with the threads of the test specimen guide shaft 13, when the screws are turned from side to side, the engaging threads are screwed forward and A test object fastener for a balance testing machine, characterized by tightening the body.