CN204755546U - Locking subassembly of excavator counter weight bolt - Google Patents

Abstract

The utility model discloses a locking subassembly of excavator counter weight bolt, including locking plate body (1) and ribbon (6), locking plate body (1) for plain film form, locking plate body (1) on be equipped with two at least round hole (2), seted up around every round hole (2) a plurality of archs (3), the central line of protruding (3) is through the summit of protruding (3) and the centre of a circle of round hole (2), the central line of two adjacent arch (3) between minimum contained angle be less than 360 income values divided by counter weight bolt (4) the head cross -section polygon limit number by locking. Not only the locking of bolt can be realized, but also the bellied recovering of bending on the locking plate body can be realized preventing to and realize using locking locking plate subassembly to carry out the bolt when locking, no longer with the aid of other spare parts beyond the bolt. (Pbpnum='1' /)

Description

Excavator counterweight bolt anti-loosening assembly

technical field

The utility model relates to a bolt anti-loosening assembly, in particular to an excavator counterweight bolt anti-loosening assembly.

Background technique

The counterweight is a key component of the excavator, which plays a vital role in the smooth operation of the excavator and its own safety. The counterweight is usually fixed on the excavator turntable by means of a polygonal bolt thread connection. The working conditions of excavators are often harsh. Once the bolts fixing the counterweight loosen, it will cause serious property loss or even personal injury. Therefore, the anti-loosening of counterweight bolts is of great significance to excavators. The common anti-loosening method of counterweight bolts is mainly to add locking glue on the surface of the bolt and the matching threaded hole of the bolt, and then tighten the bolts according to the specified torque, but this anti-loosening method is not suitable for anti-loosening of small excavator counterweight bolts. The effect is better, but for large excavators, due to the large mass of the counterweight, the inertia of the counterweight is relatively large. When subjected to vibration or external force, it is often more severe, and the counterweight bolts are prone to loosening. Another kind of bolt The anti-loosening method is to use the anti-loosening lock piece. The specific method is to bend one end of the lock piece close to the side surface of the head of the counterweight bolt, and bend the other end of the lock piece close to the surface of the main body of the turntable or the surface of other parts of the turntable. Although this Although the anti-loosening effect of the locking piece is better than that of the first type, it cannot prevent the locking piece from being bent and restored. In addition, other parts (such as the bottom plate of the turntable, etc.) other than the bolts are needed to realize the anti-loosening.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the utility model provides an anti-loosening assembly for the counterweight bolt of an excavator, which can not only realize the anti-loosening of the bolt, but also realize the prevention of the bending recovery of the protrusion on the locking plate body, and realize the When the anti-loosening lock plate assembly is used for bolt anti-loosening, other components other than bolts are no longer used.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the anti-loosening assembly of the counterweight bolt of the excavator includes a lock plate body and a cable tie, the lock plate body is a flat plate, and the lock plate body There are at least two round holes on the top, and a plurality of protrusions are opened around each round hole, and the center line of the protrusions passes through the apex of the protrusions and the center of the round hole; the two adjacent protrusions The minimum included angle between the centerlines is less than 360° divided by the number of polygonal sides of the head section of the anti-loosening bolt.

Further, the shape of the protrusion is a gear tooth shape.

Further, the minimum included angle between the centerlines of two adjacent protrusions is 0.3 to 0.5 times the value obtained by dividing 360° by the number of sides of the polygonal side of the head section of the anti-loosening bolt.

Further, the bottom between two adjacent protrusions is provided with an arc-shaped groove, and the arc-shaped groove is tangent to the concentric circle of the circle inscribed in the polygonal section of the head of the anti-loosening bolt.

Further, the diameter of the concentric circles is slightly smaller than or equal to the diameter of the circle inscribed in the polygonal section of the head of the anti-loosening bolt.

Compared with the prior art, the utility model can not only realize the anti-loosening of the counterweight bolts, but also prevent the anti-loosening lock pieces from bending and restoring , and realize that when the anti-loosening lock plate is used for anti-loosening of the counterweight bolt, no other components other than the counterweight bolt are used.

Description of drawings

Fig. 1 is a structural schematic diagram of the locking plate of the present utility model;

Fig. 2 is the assembly schematic diagram of the present utility model;

Fig. 3 is a partial enlarged view of I in Fig. 2 .

In the figure: 1. Lock plate body, 2. Round hole, 3. Protrusion, 4. Counterweight bolt, 5. Arc-shaped groove, 6. Cable tie.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 to 3, the utility model includes a lock plate body 1 and a cable tie 6. The lock plate body 1 is flat, and the lock plate body 1 is provided with at least two round holes 2. , each round hole 2 is surrounded by a plurality of protrusions 3, the center line of the protrusion 3 passes through the apex of the protrusion 3 and the center of the round hole 2; the center lines of the two adjacent protrusions 3 The minimum angle between them is less than 360° divided by the number of sides of the polygonal side of the head section of the anti-loosening counterweight bolt 4.

Further, the shape of the protrusion 3 is gear teeth.

Preferably, the minimum angle between the centerlines of two adjacent protrusions 3 is 360° divided by 0.3 to 0.5 times of the value obtained by the number of polygonal sides of the head section of the anti-loosening counterweight bolt 4; in this range, it can be as far as possible After more protrusions 3 are bent, they fit together with the side of the head of the counterweight bolt 4 to achieve a better anti-loosening effect.

As an improvement of the present utility model, the bottom between the two adjacent protrusions 3 is provided with an arc-shaped groove 5, which is connected with the polygonal head of the anti-loosening counterweight bolt 4. The concentric circles of the inscribed circles in the cross-section are tangent; the arc-shaped groove 5 is designed to facilitate the protrusion 3 without producing edges and corners after bending, and will not scratch the staff. In addition, it can also prevent stress concentration from damaging the locking piece.

Further, the diameter of the concentric circles is slightly smaller than or equal to the diameter of the inscribed circle of the polygonal cross-section at the head of the counterweight bolt 4 to be locked.

When the utility model is in use, the counterweight bolt 4 passes through the round hole 2 on the lock plate body 1, and the lock plate body 1 is attached to the bottom surface of the head of the counterweight bolt 4. After the counterweight bolt 4 is tightened, select multiple Suitable projections 3 bend them to the side of the head of the weight bolt 4 so that they are close to the side of the head of the weight bolt 4 . Then use the cable tie 6 to surround the head of the counterweight bolt 4 and the bent protrusion 3 and tighten it.

Claims (5)

1. a counterweight bolt of excavator retention device, comprise locking plate body (1) and band (6), it is characterized in that, described locking plate body (1) is plain film shape, described locking plate body (1) is provided with at least two circular holes (2), the surrounding of each circular hole (2) offers multiple projection (3), and the center line of described projection (3) is by the protruding summit of (3) and the center of circle of circular hole (2); Between the center line of described adjacent two projections (3), minimum angle is less than 360 ° divided by by the income value of locking weight bolt (4) head section polygon limit number.

2. a kind of counterweight bolt of excavator retention device according to claim 1, is characterized in that, described projection (3) shape is gear tooth shape.

3. a kind of counterweight bolt of excavator retention device according to claim 1 and 2, it is characterized in that, between the center line of described adjacent two projections (3) minimum angle be 360 ° divided by by 0.3 to 0.5 times of locking weight bolt (4) head section polygon limit number income value.

4. a kind of counterweight bolt of excavator retention device according to claim 1 and 2, it is characterized in that, bottom between described adjacent two projections (3) is provided with circular groove (5), and this circular groove (5) is with tangent by the concentric circle of locking weight bolt (4) head polygonal cross-section incircle.

5. a kind of counterweight bolt of excavator retention device according to claim 4, is characterized in that, described concentric circle diameter is slightly less than or equals by locking weight bolt (4) head polygonal cross-section inscribe diameter of a circle.