CN104947736A - Bucket - Google Patents

Abstract

The invention discloses a bucket and relates to the technical field of construction machinery manufacturing. The bucket mainly comprises a bucket main plate, bucket teeth and a tooth pin. The bucket main plate is connected with a tooth base body. A support head protruding forwards is arranged on the front portion of the tooth base body. A connection through hole is formed in the portion, behind the support base, of the tooth base body. The bucket teeth are arranged on the support head in a sleeved mode and fixedly connected with the tooth base body in the mode that the tooth pin penetrates through the connection through hole. Compared with the prior art, the problem that bucket teeth are likely to be fractured under impact when an excavator is used for shoveling materials can be solved.

Description

Scraper bowl

Technical field

The present invention relates to construction machinery production technical field, especially a kind of scraper bowl on excavator.

Background technology

Bucket tooth on power shovel is assemblied on toothholder, coordinates scraper bowl to excavate and loaded material.Bucket tooth belongs to consumable accessory, easily fracture and wearing and tearing, but toothholder requires not allow fracture, if fracture, has a strong impact on job scheduling and efficiency.Bucket tooth is main relevant with its working condition with the structure of bucket tooth, toothholder with the reason that toothholder ruptures.Working condition cannot design and specify, therefore and can only optimize its stressing conditions and deal with problems from raising bucket tooth and the intensity of toothholder own.

As shown in Figure 1, the bucket tooth of current most producer and the fit structure of toothholder are all that toothholder rear end is welded on scraper bowl mainboard, and bucket tooth inserts the head of toothholder, in the hole both then being inserted by lateral pin, connect, form combining structure, load with lotus outside bearing.There are the following problems for this structure: 1. toothholder is welded on mainboard, and this weld seam belongs to welding dissimilar materials, easily ftractures; 2. bucket tooth and the combination of toothholder front end, when bearing vertical bucket tooth direction force, bucket tooth opening part, as a fulcrum force, easily ftractures from here and causes toothholder tongue fracture of root; 3. the connecting pin of bucket tooth and toothholder is placed on toothholder head, becomes strength weak point, easily ftractures from here; 4. do not have position limiting structure, the relative toothholder of bucket tooth rocks, and lateral pin is ruptured or bending, easily makes bucket tooth be hit fracture simultaneously.Although bucket tooth inner cavity surface and toothholder head fits form are optimized for plane-plane contact form by part producer now, but affect by casting technique shrinkage strain etc., the flatness in bucket tooth inner cavity surface and toothholder head fits face and roughness are difficult to ensure, therefore, in most cases two faces are all point cantact or linear contact lay, thus cause bucket tooth unbalance stress, still may rupture.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of scraper bowl, and it can solve power shovel when shoveling dress material, and bucket tooth is hit the problem of easily fracture.

In order to solve the problem, technical scheme of the present invention is: this scraper bowl, comprise scraper bowl mainboard, bucket tooth and alligator, described scraper bowl mainboard is connected with toothholder body, described toothholder body portion is provided with the holder head protruded forward, and the described toothholder body at described holder head rear portion is provided with connecting through hole, and described bucket tooth to be sleeved on described holder head and to be fixedly connected with described toothholder body through described connecting through hole by described alligator.

In technique scheme, more specifically scheme can also be: described holder head root is provided with transition shoulder, described toothholder body is provided with groove near head place, two ends, and described toothholder body rear end face is provided with rear end groove, and described rear end groove welds with described scraper bowl mainboard.

Further: in the middle part of described bucket tooth, to be provided with bucket tooth chamber, rear portion is provided with upper and lowerly opens a grade supporting leg, in described bucket tooth chamber, top and bottom are provided with pad, and described upper and lower opening on grade supporting leg has through hole, and described opening portion, bucket tooth chamber and a described upper and lower grade supporting leg root junction of opening are provided with step.

Owing to have employed technique scheme, compared with the prior art the present invention has following beneficial effect:

1. the toothholder be originally welded on scraper bowl mainboard is made toothholder to be arranged on into one piece and is welded into holder head on an overall toothholder body and connecting through hole with scraper bowl mainboard by the present invention, holder head is fixed, avoid toothholder and be welded in separately weld cracking on mainboard, improve bulk strength, process simplification;

2. the present invention optimizes bucket tooth result, makes its upper and lower supporting leg snap on bearing mainboard, alleviates the stressed size at bucket tooth lumen openings place;

3. the present invention optimizes the position of pin-and-hole on bucket tooth and bearing, improves the intensity of bucket tooth inner chamber and holder head, makes it be not easy fracture;

4. the present invention arranges the stopping means with boss, and bucket tooth relative seat head does not have front and back, relative displacement up and down, solves bucket tooth causes bucket tooth, toothholder and alligator easily to rupture problem because rocking;

5. recessing on mainboard outside the head of bearing two ends of the present invention, relieve stresses, avoids head root to ftracture;

6. manufacturing process of the present invention is simple; Lightweight construction, saves material.

Accompanying drawing explanation

Fig. 1 is the structural representation of bucket tooth in existing power shovel, toothholder and cooperation thereof;

Fig. 2 is the bucket configuration schematic diagram of the embodiment of the present invention;

Fig. 3 is the structural representation of bucket tooth in the present invention, toothholder and cooperation thereof;

Fig. 4 is tooth seat structure figure of the present invention;

Fig. 5 is Tooth structure figure of the present invention;

Fig. 6 is the schematic top plan view that toothholder of the present invention and bucket tooth coordinate;

Fig. 7 is the sectional view along A-A hatching line in Fig. 5;

Fig. 8 is the enlarged diagram at I place in Fig. 7.

Component title and sequence number in figure:

1, toothholder body, 1-1, connecting through hole, 1-2, transition shoulder, 1-3, groove, 1-4, holder head, 1-5, rear end groove, 2, bucket tooth, 2-1, through hole, 2-2, coordinate step, 2-3, bucket tooth chamber, 2-4, open a grade supporting leg, 3, alligator, 4, pad, 5, scraper bowl mainboard, 6, toothholder.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiment is described in further detail:

Fig. 1 is the scraper bowl of prior art, includes scraper bowl mainboard 5 and bucket tooth 2, toothholder 6 rear end are welded on scraper bowl mainboard 5, and bucket tooth 2 inserts the head of toothholder 6, is then inserted by alligator 3 in both holes, connects; There is more problem as described in the background section in this structure.

The scraper bowl of Fig. 2, Fig. 3 and Fig. 6, comprise scraper bowl mainboard 5, bucket tooth 2 and alligator 3, scraper bowl mainboard 5 is connected with toothholder body 1, toothholder body 1 front portion is provided with the holder head 1-4 for supporting bucket tooth 2 protruded forward, the toothholder body 1 at holder head 1-4 rear portion is provided with connecting through hole 1-1, and bucket tooth 2 to be sleeved on holder head 1-4 and to be fixedly connected with toothholder body 1 through connecting through hole 1-1 by alligator 3.

Holder head 1-4 root in the toothholder body of Fig. 4 is provided with transition shoulder 1-2, toothholder body 1 is provided with groove 1-3 near head place, two ends, outside the head of groove 1-3 distance two ends, distance is less than 5 millimeters, and groove 1-3 offers mainly relieve stresses, avoids head root to ftracture; Toothholder body 1 rear end face is provided with rear end groove 1-5, and rear end groove 1-5 welds with scraper bowl mainboard 5.

Bucket tooth chamber 2-3 is provided with in the middle part of the bucket tooth 2 of Fig. 5, rear portion is provided with upper and lowerly opens a grade supporting leg 2-4, in the 2-3 of bucket tooth chamber, top and bottom are provided with pad 4, upper and lower opening on grade supporting leg 2-4 has through hole 2-1, and 2-3 opening portion, bucket tooth chamber and upper and lower grade supporting leg 2-4 root junction of opening are provided with the step 2-2 matched with the transition shoulder 1-2 of holder head 1-4 root.

During scraper bowl assembling, bucket tooth chamber 2-3 is inserted into holder head 1-4, and the upper and lower grade supporting leg 2-4 that opens of bucket tooth 2 is inserted on toothholder body 1, the upper and lower gap ﹤ 0.5 millimeter opening two planes that grade supporting leg 2-4 contacts with toothholder body 1, now, bucket tooth 2 upper, under the connecting through hole 1-1 opened on the through hole 2-1 of grade supporting leg 2-4 and toothholder body 1 be tangential on same and be positioned at the plane of symmetry along bucket tooth length direction and perpendicular to the straight line of through hole end face, the transition shoulder 1-2 of toothholder body 1 and holder head 1-4 root and bucket tooth chamber 2-3 opening part and upper, under open a grade step 2-2 for supporting leg 2-4 root junction and coordinate, the top and bottom of holder head 1-4 and the pad 4 of 2-3 top and bottom, bucket tooth chamber closely cooperate, restriction bucket tooth is to scraper bowl medial movement, avoid shearing alligator, pad and the abutment head top and bottom of bucket tooth inner chamber top and bottom closely cooperate, produce frictional force, prevent teetertottering and easily rupturing of bucket tooth relative seat, as shown in Figure 7 and Figure 8, alligator 3 insert bucket tooth 2 upper and lower open through hole 2-1 in grade supporting leg with in the connecting through hole 1-1 on toothholder body 1, bucket tooth 2 is connected with toothholder body 1, have individual groove in the middle of alligator, groove is equipped with the opening annulus that diameter is less than alligator diameter and is greater than intermediate groove diameter, alligator inserts bearing hole and relies on the elastic shrinkage of opening annulus and uphold and bearing hole interference fit, thus alligator is fixed in bearing hole.The axial wobble amount ﹥ bucket tooth of alligator opposed open annulus opens hole centre distance on grade leg port and bearing mainboard up and down, and cannot contact alligator when bucket tooth moves forward to greatest limit, alligator does not bear the load that bucket tooth transmits, and avoids by shearing and ruptures.

Claims (3)

1. a scraper bowl, comprise scraper bowl mainboard (5), bucket tooth (2) and alligator (3), it is characterized in that: described scraper bowl mainboard (5) is connected with toothholder body (1), described toothholder body (1) front portion is provided with the holder head (1-4) protruded forward, the described toothholder body (1) at described holder head (1-4) rear portion is provided with connecting through hole (1-1), and described bucket tooth (2) is sleeved on described holder head (1-4) and goes up and pass through described alligator (3) and be fixedly connected with described toothholder body (1) through described connecting through hole (1-1).

2. scraper bowl according to claim 1, it is characterized in that: described holder head (1-4) root is provided with transition shoulder (1-2), described toothholder body (1) is provided with groove (1-3) near head place, two ends, described toothholder body (1) rear end face is provided with rear end groove (1-5), and described rear end groove (1-5) is welded with described scraper bowl mainboard (5).

3. scraper bowl according to claim 1 and 2, it is characterized in that: described bucket tooth (2) middle part is provided with bucket tooth chamber (2-3), rear portion is provided with upper and lowerly opens a grade supporting leg (2-4), the interior top and bottom of described bucket tooth chamber (2-3) are provided with pad (4), described upper and lower opening on a grade supporting leg (2-4) has through hole (2-1), and (2-3) opening portion, described bucket tooth chamber and a described upper and lower grade supporting leg (2-4) root junction of opening are provided with step (2-2).