CN201372455Y

CN201372455Y - Bucket tooth for excavator

Info

Publication number: CN201372455Y
Application number: CN200820208863U
Authority: CN
Inventors: 徐雪明
Original assignee: NINGBO YUXIANG MACHINERY CASTING Co Ltd
Current assignee: NINGBO YUXIANG MACHINERY CASTING Co Ltd
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-12-30
Anticipated expiration: 2018-12-31

Abstract

The utility model discloses a bucket tooth for an excavator, which comprises a bucket tooth (7) with a pin hole (8), and a tooth holder (1). The tooth holder (1) is inserted into the inner cavity of the bucket tooth (7) and is connected with the bucket tooth (7) through a pin (4) and a clamp spring (3), a counter bore (2) is formed on the end surface of the pin hole (8) arranged on the tooth holder (1), and the clamp spring (3) is positioned in the counter bore (2) and is clamped in a clamp spring groove (5) arranged on the pin (4). The bucket tooth has the advantages that the service life of the pin is long, replacement is convenient, and work efficiency can be further improved.

Description

Excavator bucket teeth

Technical field

The utility model relates to the plant equipment field, specifically is a kind of excavator bucket teeth that is applied on the engineering machinery.

Background technology

Often will use excavator on the engineering machinery now, generally comprise bucket tooth and toothholder on the excavator, need to use pin between them and connect, promptly all have the pin-and-hole that cooperates with pin on toothholder and the bucket tooth, toothholder is the bucket edge that is welded on excavator simultaneously.There is a groove at pin middle part commonly used at present, card has C type jump ring on the groove, the internal diameter of jump ring is slightly larger than the diameter of pin groove, external diameter is slightly larger than the internal diameter of pin-and-hole, pin after the assembling pierces in the pin-and-hole of toothholder, rely on the frictional force of jump ring external diameter and pin-and-hole inwall to block, pin is fixed in the pin-and-hole, bucket tooth is then fixedlyed connected with toothholder with jump ring by pin.But there is following shortcoming in the syndeton of this bucket tooth and toothholder: owing in use can constantly be subjected to active forces such as shearing, twisting resistance, jump ring will soon produce fatigue failure even fracture under the effect of this alternating stresses, so the life-span is very short; Simultaneously, when changing pin because jump ring is disconnected in the pin-and-hole, therefore be difficult to pin is impacted out with iron hammer, general all is earlier toothholder to be cut off from the bucket of excavator with methods such as gas cuttings, and then the junction of severing bucket tooth and toothholder, take out pin and jump ring, often in the life cycle of a secondary toothholder, will change several pairs or even tens deputy pins, so use cost is very big; Both bothered like this, and if do not have gas cutting equipment to transfer on every side to come from far place, operating efficiency is very low.

The utility model content

Technical problem to be solved in the utility model is a kind of long service life to be provided, to change excavator bucket teeth convenient and that can increase work efficiency.

For solving the problems of the technologies described above, a kind of excavator bucket teeth that the utility model provides, comprise bucket tooth and toothholder with pin-and-hole, be connected with jump ring in the inner chamber of toothholder insertion bucket tooth and by pin, be shaped on counterbore on the pin-and-hole end face of described toothholder, described jump ring is positioned at counterbore and is stuck in jump ring groove on the pin.

After adopting above structure, the utility model compared with prior art has the following advantages: because jump ring is an end that is positioned at pin, so need not be provided with groove in the middle part of the pin, the shearing force during work can not focus on the pin middle part, and the application life of pin is just long; When changing pin, as long as beat and can take out pin in pin one flank attack with iron hammer, without special equipments such as gas cuttings, it is convenient therefore to change, and more can increase work efficiency simultaneously.

As improvement, also be embedded with rubber ring between described jump ring and the counterbore.Adopt this structure, make between jump ring and the toothholder counterbore to have certain cushion effect, prolong the application life of bucket tooth more.

Description of drawings

Shown in Figure 1 is the structural representation of prior art excavator bucket teeth;

Shown in Figure 2 is the structural representation of the utility model excavator bucket teeth;

Shown in Figure 3 is the perspective view of the utility model excavator bucket teeth.

Wherein: prior art: 1 ', toothholder; 3 ', jump ring; 4 ', pin; 5 ', groove; 7 ', bucket tooth; 8 ', pin-and-hole;

The utility model: 1, toothholder; 2, counterbore; 3, jump ring; 4, pin; 5, groove; 6, rubber ring; 7, bucket tooth; 8, pin-and-hole.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

By the structural representation of prior art excavator bucket teeth shown in Figure 1 as can be known, it comprises bucket tooth 7 ' and the toothholder 1 ' with pin-and-hole 8 ', be connected with jump ring 3 ' in the inner chamber of toothholder 1 ' insertion bucket tooth 7 ' and by pin 4 ', pin 4 ' middle part is provided with the groove 5 ' that cooperates with jump ring 3 ', and jump ring 3 ' also is positioned at the middle part of toothholder 1 ' pin-and-hole 8 ' simultaneously.

By the structural representation of Fig. 2, the utility model excavator bucket teeth shown in Figure 3 as can be known, it comprises bucket tooth 7 and the toothholder 1 with pin-and-hole 8, be connected with jump ring 3 in the inner chamber of toothholder 1 insertion bucket tooth 7 and by pin 4, be shaped on counterbore 2 on pin-and-hole 8 end faces of described toothholder 1, described jump ring 3 is positioned at counterbore 2 and is stuck in jump ring groove 5 on the pin 4.Also be embedded with rubber ring 6 between described jump ring 3 and the counterbore 2.

During assembling, earlier rubber ring 6 is put into the counterbore 2 of toothholder 1 pin-and-hole 8 end faces, again jump ring 3 is embedded in the rubber ring 6, then toothholder 1 is inserted in the inner chamber of bucket tooth 7, again the other end insertion pin-and-hole 8 of pin 4 from relative counterbore 2, impact with iron hammer when running into jump ring 3, get final product when making jump ring 3 just in time be positioned on the groove 5 of pin 4.During dismounting, impact at counterbore 2 one ends, make pin 4 withdraw from jump ring 3 and get final product with iron hammer.

Claims

1, a kind of excavator bucket teeth, comprise the have pin-and-hole bucket tooth (7) and the toothholder (1) of (8), be connected with jump ring (3) in the inner chamber of toothholder (1) insertion bucket tooth (7) and by pin (4), it is characterized in that: be shaped on counterbore (2) on pin-and-hole (8) end face of described toothholder (1), described jump ring (3) is positioned at counterbore (2) and is stuck in jump ring groove (5) on the pin (4).

2, excavator bucket teeth according to claim 1 is characterized in that: also be embedded with rubber ring (6) between described jump ring (3) and the counterbore (2).