JPS61290129A - Tooth fixing jig - 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 This invention relates to a fixture for disposable teeth used in earth moving equipment such as bulldozers, graders and trench layerers.

According to one idea of the invention, the tooth fixture comprises a pair of fixing members (42) which are arranged to be relatively pivotable from an inner position to an outer position; biasing means (44) for biasing away toward an outward position, wherein the biasing means (44) are preferably in the form of a resilient block and made of rubber or neorene. Preferably, said spacer gMu is such that when a blow is applied substantially at right angles thereto, said fastening member can be broken to facilitate removal of the fastener from m and the adapter. It is preferable that the material be formed to have a high strength (weak and strong).

According to another idea of the invention, there is provided a ring-shaped rigid tooth with a working end and a root through which a transverse passage passes, the transverse passage being provided with the above-mentioned fastening device. and such arrangements are wholly or substantially wholly contained within the transverse passageway when the securing members are placed in their inner position. Preferably, the root portion is provided with retaining means for retaining the fixing member in the transverse passageway. The retaining means has a protrusion from the transverse passageway and a recess in the resilient block, the recess having a protrusion for preventing lateral movement of the fixture with respect to the transverse passageway. It is preferable that a section is inserted. The fixture also includes an abutment member slidably disposed against a side of the passageway remote from the working end, the abutment member being relative to said side of the transverse passageway. Preferably, it abuts so that it can pivot.

The invention also provides, in another aspect, a combination of a ring-shaped rigid tooth with an adapter for it and a fastener as described above, connecting the axial rigid tooth to the adapter.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a rigid annular tooth 10, an adapter in the form of a tooth socket 12 for receiving the tooth 10, as will be described later, and a fixture 14 for retaining the tooth 10 in the adapter. is shown. The adapter socket 14 has a "U" shaped member, and the lli! of the "U" shaped member. 16 is welded to the bottom plate 18 of the packet (not shown).

alo is inward or backward! It has a spade-shaped working end 20 extending up to 20a, and from the inner or rear wall 20a extends a root 22 which is received in the socket 14. Root portion 22 has a transverse passageway 24 extending therethrough. M! ! The passageway 24 is
A flat side wall 28aL1 extending laterally to the base 26
5 and 28b. , the upper end of the crossing passage 24 is wide and the end wall 32
a linearly arranged platform 30 having
is formed. Tonal plates 34 are mounted on these platforms 30 and constitute a guide for the cross passage 24.

Adapter socket 12 has a pair of aligned side openings 36 defined by "U" shaped cutouts in arms 16 and base plate 18. A pair of side openings 36 have longitudinally spaced end walls 38 and 40. Individual v38 inner corner 3
9 is rounded for purposes that will be revealed later.

These side openings 36 are adjacent to the transverse passage 24 when the root 22 is received in the socket 14.

The fixing device 14 includes a pair of fixing members 42 made of aluminum.
, an elastic, rubber or neoprene trapezoidal block 44 , and an abutment plate 46 .

The elastic trapezoidal block 44 has an isosceles trapezoidal shape. It functions as a biasing means for the fixation member 42 as explained below. The abutment edge 46 extends over the entire length of the side wall 28a of the transverse passageway 24 remote from the working end 20 of the tooth 10 and slidably abuts against the side wall 28a. The fixing member 42 extends substantially in the direction of the root portion 22 . The end 48 of the fixing member 42 closer to the abutment plate 46 is rounded and received in a semicircular recess 50 in the abutment plate 46. The exterior of the fixing member 42 is provided with generally triangular projections 52, each of which has a forward end wall that is slightly rounded and sloped for purposes that will become apparent later, as will be explained hereinafter. 54 and a straight rear side wall 55.

A neck-shaped or linear weak-strength portion 56 is provided between the outer end 48 and the thick portion of the protrusion 52 . The inner surface 58 of the fixing member 42 is flat over substantially its entire length and abuts against the sides of the block 46 which are sulphured against these surfaces.

Between the outer end 48 and the protrusion 52 and between the outer end 48 and the inner surface 5
8, there is either a very small radius or no radius at all.

A low, longitudinally extending stud 60 connects the transverse passageway 24.
It is located at the center in a state where it stands up from the substrate 26 of. A longitudinal W2O3 is provided in the resilient trapezoidal block 44, which receives the stud 60. W46
Engagement of stud 60 in 2 prevents lateral movement of fixture 12 within transverse passageway 24.

The resilient trapezoidal block 44 moves from an inner position (indicated by dotted lines in FIG. 1) when the block 44 is compressed to an outer position (the first one) when the block 44 is in its rest position.
The securing member 42 is configured to pivot relative to the rounded end 50 of the securing member 42 (shown in solid lines in the figure).
It functions as a biasing means for biasing.

When the fixation members 42 are disposed in their inner position, they are disposed substantially entirely within the transverse passageway 24. When the fixing member 42 is located in its outer position, the projection 52 projects beyond the transverse passageway 24 and lies between the end walls 38 and 40 of the side opening 36. However, the forward end of the securing member 42 is contained entirely within the transverse passageway 24.

The front end 54 of each projection 52 engages the frontage wall 40 near the working end 20 of the tooth.

The tooth 10 slides into the root 22 into the mouth 64 of the socket 12 until the rear wall 55 of the projection 52 engages the mouth 64 of the socket 12.
It can be easily installed into the socket 12 by sending the wire. A further load of inward pressure causes the fixing member 4 to press inwardly the block 44 by the rear wall 55.
2 to move the fixation member 42 to its inner position, allowing the root 22 to engage the socket 12. When the root portion 22 is received in the socket 12 and the rear wall 20a abuts the mouth 56 of the socket 12, the protrusion 52 faces the opening 36. Block 44 urges fixation member 42 outwardly toward its outer position so that projection 52 enters frontage 36 and forward end! 54
engages the rounded inner edge 39 of the end wall 38.

The root 22 is held firmly in place in the socket 12 and is prevented from moving backwards by the rear wall 20a of the working end 20 engaging the socket 12, and by the locking member 42.
The front end wall 54 of the front end wall 54 engages the end wall 38, thereby preventing forward movement.

Any force that tends to force the root 22 away from the socket 12 is applied through the outer end 48 (or slightly inward of it).
Note that the angle of the front surface of the front end wall 54 is chosen to load onto the abutment plate 46 along the length of the individual fastening member 42 . Very large pressures, exceeding any forces normally encountered in practice, can be absorbed by the fixation member 42, so that the possibility of pulling the tooth 10 out of the socket 16 is virtually non-existent.

The individual shape of the front end wall 54 and the rounded shape of the end wall 38 ensure that the force exerted from the end wall 38 does not pivot the fixing member 42 inwardly or outwardly, yet as described above. It is chosen such that it is only carried downwardly along the length of the fixing member.

When the working end 20 of the tooth 10 becomes worn, the tooth 10 must be removed from the socket 14.

To do this, the fixture 14 must be removed, which can be accomplished by applying a strong blow across the root to the abutment plate 46 with a hammer. This causes the abutment plate 46 to move relative to the fixed member 42, and as a result, the weak strength portion 56
producing these fractures along the lines of. This is ensured because the narrow neck or thin intersection 59 forms stress points. The elastic block 44 is also torn along the groove 62. When this occurs, portions of fixture 14 can be easily pushed out of passageway 26. This poem 1
The root 22 of the 0 can be removed from the socket 1 12, with the aid of hammering the inner end 68 of the root 22, if necessary. The new tooth 10 can be installed using the procedure described above. Excess soil is removed from socket 1.
Manual force alone is sufficient to insert the root 22 into the socket 12, as long as the root 22 remains inside the socket 12. A light blow with a hammer is therefore all that is required for that purpose.

In the third illustrated variant of the invention, teeth 68 are provided where abutment plates are omitted. Here, the rounded end 70 of the locking member 72 abuts directly against the side wall 74 of the root 76, which side wall 74 is spaced from the working end of the tooth 68.

Stud 7, which is the same as stud 60 except that it is larger.
8 holds the fixture in place.

This stud 78 can be broken by hitting the fixing member with a hammer, and a further blow can cause the passage 7
Move it from 6.

In the rough teeth 80 of this invention (see FIG. 4),
The protrusion 60 from the base of the passage is omitted and the side wall 8
A narrow rim 82 from 4 is connected to the rounded end 8 of the fixed part lug 88.
6.

The plurality of rims 82 or one of the rims 88 is broken when the fastening member 88 is struck by a hammer as described above to allow removal of the fastening member.

Teeth 68 and 80 are the same as IN+10 except for the features described above.

As shown in FIGS. 5 and 6, the hollow tooth 90 has a hollow rear end 92 that receives a pointed adapter 94. As shown in FIGS. A transverse passageway 96 is provided through the adapter and a fixture 98 is received therein.

Fixture 98 is a disposable member, but includes a fixation member 100, an outward projection 102, and an elastic block 104 therebetween, with the fixation member being sulfurized relative to the elastic block 104. and is substantially the same as the fixing member 12. The rounded end of the fixing member 100 is received in the rounded recess of the abutment plate 106.

The inner end of block 104 is also sulphided.

I have found that each of the above-described teeth of this invention can be easily attached to its adapter.

When the working end becomes worn, the teeth can be easily removed from the adapter as described above. Once the teeth are attached to the adapter, the retainer holds the teeth and ensures that the teeth are not separated from the adapter.

The invention can be used with the advantages described above for teeth of all sizes having weights from about 2 h to about 70 Ky or more.

I have found that because the fasteners are held firmly in the annular solid tooth passageway, they cannot be accidentally removed from the passageway.

However, the fasteners can be easily removed as described above. This is because two features allow the fastening member to be destroyed relatively easily and quickly. The first feature is that the fixing member is made of a material that has high compressive strength but low shear strength, such as aluminum. The second feature is that since the fixing member has a neck or weak strength portion, it can be broken relatively easily when a sharp force is applied to the fixing member as described above.

Because the rigid shank tooth 10 is provided on the fixture 12 in the passageway 24, there is no need to transport the fixture 12 separately in stock. Of course, this advantage does not apply to the hollow teeth of this invention.

The invention is not limited to the embodiments and variants described above and illustrated in the drawings. For example, in the embodiment shown in FIG. 4, a single rim could engage a central slot in the attached plate to hold the fixture in place. Suitable retaining means may also be provided to retain the fixture in the passageway of the pointed adapter in the embodiment of FIGS. 5 and 6. This passage may be a groove formed on the surface of the adapter instead of a through hole. The fixing member can be made of other materials that have low compressive strength but low shear strength. The invention can also be used in dragline excavators and other earthmoving equipment.

[Brief explanation of the drawing]

FIG. 1 shows the underside of the axial rigid tooth of the invention in position in an adapter socket, with a portion cut away and the sides of the bucket and cover plate omitted for clarity of the drawing. Bottom view: Figure 2 is a cross-sectional view taken along line 2-2 in Figure 1; Figure 3 is a cross-sectional view taken along line a3-3 in Figure 1; Figure 4 is a cross-sectional view of the invention in the adapter. FIGS. 5 and 6 each show a detailed underside view of the root of another rigid axial tooth of this invention; FIGS. 7 and 8 each show a hollow tooth of this invention. 8 is a side view of the back of the tooth and a cross-sectional view taken along line 18-8 of FIG. 7; FIG. 10...teeth, 12...teeth socket (adapter),
14...Fixing tool, 16...Arm, 18...Bottom plate, 2
0...Working end, 20a...Inner or rear end, 22
...Root, 24...Cross passage, 26...Base, 2
8a, 28b... side wall, 30... platform,
32... End wall, 34... Board, 36... Side opening, 3
8... End wall, 39... Inner corner, 40... End wall, 42
...Fixing member, 44...Elastic trapezoidal block, 46.
... Contact plate, 48 ... Outer end, 50 ... Semicircular recess, 52 ... Projection, 54 ... Front end wall, 55 ... Rear side wall, 56 ... Weak strength Part, 58...Inner surface, 59.
...Intersection, 60...Stand, 62...Groove, 64
...mouth, 68...inner end, 68...teeth, 7o...
Rounded end, 72... Fixed member, 74... Side wall, 76... Root, 78... Stud, 80... Teeth, 82... Narrow rim, 84... Side wall, 86... Rounded end, 88... Fixed member, 90... Hollow tooth,
92...Hollow rear end, 94...Adapter, 96...
. . . Cross passageway, 98 . . . Fixing tool, 100 .

Claims (1)

[Claims] A pair of fixing members (42) that are relatively pivotable from an inner position to an outer position, and a biasing member that urges the fixing members to move apart from the inner position to the outer position. means of force (
44) A dental fixture comprising: