JPS63122831A - Adapter fixing apparatus in drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fixing device for a WhiSler type adapter, and more particularly to a fixing device for a WhiSler type adapter, and more particularly to a fixing device for a WhiSler type adapter, and more particularly for fixing the handle of the adapter to the lip of an excavator. The present invention relates to a fixing device for fixing mutually spaced legs of a device.

BACKGROUND AND SUMMARY OF THE INVENTION Previous patents addressing fixation devices for Whistler-type adapters include U.S. Pat.
, 271,615, and earlier patents covering similar devices include U.S. Pat. Nos. 3,572,785 and 3,722,932.

Today, there is a general trend in the market towards corrective maintenance rather than preventive maintenance, simply because of economics and availability of workers. The excavation conditions are as intense as ever, and the machines remain at maximum output, so the load on the system is excessive. Whistler-type lip systems have been shown to exhibit excellent performance as long as critical support areas are maintained such that the adapter securely secures to the lip. However, for the reasons mentioned above, this is not the case; very often the legs of the adapter become damaged and/or the C-clamp-wedge system becomes dislodged. What happens first is that the wedge is pushed out and the C-clamp falls off, thereby losing support and damaging the adapter legs, or the entire adapter comes off without damage. It is almost impossible to predict whether the adapter leg will break or the fixation device will be ejected as a second movement. Even if the wedge and C-clamp are welded together, it has been known that the wedge can be pushed out and the C-clamp disengaged, thus leading to adapter failure and/or subsequent adapter failure. can be considered as the main factor in the dropout of

This is believed to occur due to looseness in the fit between the adapter and the lip. A first support at the leading edge of the lip supporting the lip within the adapter leg includes:
A suitable C-clamp and wedge assembly involves the importance of a second support located at the rear of the leg where support is required for proper operation.

The above problem can be solved by allowing the entire adapter device to move under large static or impulsive loads, and not just the area in front of the C-clamp and the wedge in the case of a conventional wedge-type connection. This allows for a more balanced stress distribution, which makes the overall assembly stronger. Additionally, the fixation device of the present invention is easier to install and remove compared to conventional wedge-shaped devices, thus further improving customer service and safety. Finally, this locking device can eliminate the normal forces that are always present in wedge-shaped C-clamp-wedge systems that tend to push the wedge out of the assembly.

More particularly, the invention utilizes a C-clamp and a wedge, with a spring member interposed therebetween, to provide only supporting contact therebetween when the adapter is in an unloaded state. That's what I do.

When the wedge is in assembly with the C-clamp, this arrangement of the assembly against the rear of the Whistler-type adapter leg is generally compressed and non-deformable. This places a very high load on the adapter leg in front of the wedge when the adapter moves as described above.

Improved Whistler type that allows for movement of the adapter on the lip to be exploited under conditions of loose fit due to wear and deterioration of the support area (as this seems to be the case in more than 90% of cases today) Provides an adapter.

Heretofore, springs have not been widely used as anchoring devices for drilling teeth. An example of a device using a spring is U.S. Pat. No. 3,832,077, which shows a spring connected to a locking pin to secure the tip of the tooth to the adapter. Although the disclosed adapter is of the Whistler type, it does not use a C-clamp and wedge;
It is fixed to the lip by the hole 1. However, bolts are not commonly used to secure the adapter to the lip of an excavation rig because bolts can pick up threads or allow small objects to get into them, making them difficult to dismantle.

DETAILED DESCRIPTION OF THE EMBODIMENTS Referring to the drawings and particularly to FIG. 1, a typical conventional fastening device is a whistler type adapter X attached to the lip Y of an excavator, such as a dragline packet or shovel digper. shown as being applied to.

The following is, first, a vector analysis based on the load vector F, which can exist at any general angle with respect to the tip surface or centerline of the type, excavator location and duty cycle.

As the lip support pad wears due to constant hammering with an external force F, a gap widens in zone A, which causes
The upper legs of the adapter are held together by a tensile force and the lower legs are bent by a compressive force. The combined reaction force applied to the C-shaped clamp C and the wedge W causes an extrusion force indicated by R, W, and this extrusion force Rw causes the wedge W to be extruded even if it is arbitrarily welded to the C-shaped clamp C. As a result, the C-shaped clamp C comes off, and furthermore, an abnormal load occurs or the adapter comes off. This extrusion force is exerted by the inclination between the C-shaped clamp C and the wedge W, as shown, or alternatively,
Lip Y keyway and wedge W as shown in zone L
This is caused by a diagonal reaction force created by a similar slope between the leading edge of the The slope is wedge W and C
Whether it is located between the shaped clamps C or between the lip Y and the wedge W is a matter of the designer's choice and differs depending on the lip Y. In any case, wedge W
and the C-shaped clamp C, regardless of whether the lip Y has an inclined keyway or not, the extrusion force Ru
This causes extrusion of the wedge W.

If instead of an external force F from the top, an external force F' is applied from the bottom, a bending action will occur on the top leg, and a tensile force and elongation will occur on the bottom leg. Even under the influence of the external force F', an extrusion force Rub' still acts in the direction shown. This is between the wedge W and the C-shaped clamp C, and/or
This is because the slope between the wedge W and the keyway of the lip Y is open upward to facilitate assembly from the top of the lip Y of the packet. C-shaped clamp C and wedge W
If the buckets 1 and 2 are oriented in the opposite direction, and the great effort of assembling the buckets 1 to 1 from below is accepted, the extrusion force will always be downward no matter where on the tooth tip surface the external forces F and F' act.

A typical example of the circulation of the force vector from F to F' and from F' to F is the fluttering effect in the loaded stroke of a shovel loader or hydraulic excavator.

Next, FIG. 2 will be explained. A structure embodying the invention comprises a Whistler-type adapter 20 with an upper leg 21 and a lower leg 22 located on the upper and lower sides of the lip 23 of the excavator. The adapter 20 is provided with an integral, forwardly projecting nose 24 onto which a cutting tooth tip 25 is removably mounted in place by a tooth tip fixing mechanism 26.

This is conventional technology.

It is also conventional to provide an opening 27,28 in each of the upper and lower legs 21, 22 of the adapter 20, extending vertically into the lip 23 for receiving a fixation device. The provision of the opening 29 is also one step further from the prior art. The fixation device is indicated generally at 30 and is shown in more detail in FIGS. 3-5.

The fixing device of the invention, with reference to FIG. 5, includes a wedge member 31, a C-shaped clamp member 32, and a movable retaining member 33 loaded by a plurality of springs 34. There is no inclination between the opposing surfaces of the wedge member 31 and the C-shaped clamp member 32, so no pushing force is applied to the wedge 31 due to their influence.

In operation, when the adapter 20 moves, the fixation device 30 is free to move so that the rear side of the C-clamp member 32 and wedge member 31 assembly is not compressed and the legs 21.22 are It can move more or less harmoniously even under the influence of various external forces F and F'.

In the embodiment of the invention shown in FIGS. 2-5, the wedge member 31 is provided with a ratchet 35 adapted to engage with a ratchet portion 36 provided on the retaining member 33. In the embodiment of the invention shown in FIGS. Further, the holding member 33 is provided with a plurality of columns 37 extending rearward, and springs 34 are attached to these columns 37. Also, spring 3
4 is supported within a counterbore opening 38 in the front face of the C-shaped clamp member 32.

Further, in order to align the spring member consisting of the retaining member 33 and the spring 34, a lug 39 is provided on the rear surface of the retaining member 33, and this lug 39 is provided with a hole for receiving the pin 40. ing. Furthermore, the pin 40 is slidably mounted within a horizontally extending groove 41 in the side wall of the C-shaped clamp member 32.

The pin 40 acts to guide the retaining member 33 by passing through the hole and groove 41 of the lug 39 and is in supporting contact with the front surface of the retaining member 33 (i.e. the rear surface of the wedge 31). It will be appreciated that the surface on which the portion 36 is provided) and the surface on which the ratchet 35 is provided. In addition, when the adapter 20 moves or bends with respect to the lip 23, the support column 37 is activated by the spring 3.
4 is designed to prevent unnecessary movement.

This invention holds the adapter securely in the lip.
It will be appreciated that rather than using a clamp-to-wedge device, the present invention includes a device that flexes with movement of the Whistler-type adapter around the lip, thereby only allowing movement of the adapter.

A second embodiment of the present invention is shown in FIGS.
Digit symbols are used to indicate the same parts as in the embodiments of FIGS. 2-5. Therefore, the adapter is coded 1
20 and a reference numeral 124 on which an excavation tooth tip 125 is formed.
It has a nose of Upper leg 12 of adapter 120
1 and the lower legs 122 are on either side of the lip 123 of the excavator.

In this case, the lip 123 is modified in that it is provided with a cylindrical bar 142 at its front end.

This bar 142 facilitates swinging and bending movements of the Whistler-type adapter 120 relative to the lip 123.

Another difference between this embodiment and the embodiments of FIGS. 2-5 lies in the features of the holding member 131. Even when the holding member 131 does not function as a wedge, the holding member 131 will be referred to as a "wedge" because it is conventional practice to express the object opposite the C-shaped clamp as a "wedge."

Here, the front and rear vertically extending surfaces are substantially parallel, and the rear surface is provided with horizontal notches or ratchets, as indicated at 135. In this embodiment, the lip 123 is located at the front end of the opening 129.
It has a wall surface 129a that extends vertically. This is the second
This is in contrast to the inclined wall surface 29a in the figure.

As indicated earlier, there are those who prefer and.

A further difference between this embodiment and the previous embodiment lies in the characteristics of the guide member for the holding member 131. In this embodiment, a pin 140 is provided that extends forwardly through an opening 141 in the C-shaped clamp member 132. It is received within an axially extending hole 139 in central post 137.

Although the detailed description of the invention has been disclosed for purposes of illustration in the foregoing specification, many of the details set forth herein are
Modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional schematic side view showing the operation of a conventional fixing device, FIG. 2 is a partially sectional side view showing a fixing device according to the present invention, and FIG. 3 is an enlarged partial sectional view taken along line 3, FIG. 4 is an enlarged partially sectional side view showing an embodiment of the fixing device of the present invention, and FIG. 5 is an exploded perspective view of the fixing device shown in FIG. 4. FIG. 6 is a partially sectional side view showing a modification of the present invention, and FIG. 7 is 7-7 in FIG. 6.
8 is an enlarged partially sectional side view of the fixation device of FIGS. 6 and 7; FIG. 9 is an exploded perspective view of the fixation device of FIGS. 6 to 8; It is a diagram. In the figure, 20: Adapter 21: Upper leg 22: Lower leg 23: Lip 24: Nose 27, 28, 29: Opening 30:
Fixing device 31: Wedge member 32: C-shaped clamp member 3: 3: Holding member 34: Spring 35: Ratchet 36: Ratchet part 37: Strut

Claims (1)

[Claims] 1. An excavator comprising a lip adapted to extend substantially horizontally during excavation, and a Whistler-type adapter having a nose portion projecting forward of the lip during excavation. In the excavator, an opening for receiving a fixation device is provided spaced from a rear end of the leg of the adapter and vertically aligned with the lip and the leg. , a wedge member and a C-shaped clamp member extending vertically and spaced apart from each other, and allowing rocking of the adapter on the lip when a load is applied to the adapter; to prevent concentration of tensile and compressive forces on the legs, and to provide substantially only supporting contact between the wedge member and the C-shaped clamp member when the adapter is in an unloaded state. , the wedge member and the C
a spring member interposed between the shaped clamp members;
A fixing device for an adapter in an excavator that is removably attached to said opening. 2. A fixing device for an adapter in an excavator according to claim 1, wherein there is no inclination between the wedge member and the C-shaped clamp member. 3. The C-shaped clamp member and the wedge member have opposing vertical surfaces, and an opening is provided in the surface of the C-shaped clamp member,
3. A fixing device for an adapter in an excavator according to claim 2, wherein a spring is attached to each of the openings, and a retaining member is interposed between the spring and the surface of the C-shaped clamp member. 4. The fixing device for an adapter in an excavator according to claim 3, wherein the holding member has a surface facing the wedge member, and a ratchet member is provided on each of the surface and the surface of the wedge member. . 5. A fixing device for an adapter in an excavator according to claim 4, wherein the C-shaped clamp member is provided with a pin member for guiding the holding member. 6. The fixing device for an adapter in an excavator according to claim 5, wherein the holding member is provided with a lug with a hole extending toward the C-shaped clamp member, and the pin member extends through the hole in the lug. 7. Fixing for an adapter in an excavator according to claim 5, wherein the holding member is provided with a post for each spring, one of the posts having a hole for receiving a pin member. Device. 8. A fixing device for an adapter in an excavator according to claim 4, wherein the wedge member is provided with a second vertical surface for supporting engagement with the surface of the opening of the lip. 9. Fixing device for an adapter in an excavator according to claim 8, wherein the second vertical plane is substantially parallel to the first plane of the wedge member. 10. A fixing device for an adapter in an excavator according to claim 8, wherein the second vertical surface is inclined with respect to the first surface of the wedge member in order to fit into the inclined opening of the lip. . 11. The spring member includes a holding member that is elastically applied with force in a direction away from the C-shaped clamp member and engages with the wedge member, and the holding member and the wedge member have opposing surfaces provided with ratchets. A fixing device for an adapter in an excavator according to claim 1.