CN201099875Y - Cutter positioning structure of excavator - Google Patents

Abstract

The utility model relates to a cutter positioning structure of an excavator, which comprises a cutter tower arranged on a wheel hub of the excavator for erecting cutters, wherein the end part of the cutter tower is provided with a bushing groove, a detachable bushing is arranged in the bushing groove in a penetrating way, the front end of the bushing is provided with an outer convex part exposed and covering the end part of the cutter tower, and the bushing is provided with a cutter fixing groove for the penetration and the positioning of the cutter; the bushing can be made of a material with higher hardness and higher wear resistance, so that the end part of the cutter tower cannot be worn, and when the outer convex part of the bushing or the cutter fixing groove is worn due to the fact, the cutter can be kept at the optimal positioning effect only by replacing the bushing, and the whole cutter tower or a large component on the cutter tower does not need to be overhauled or replaced.

Description

Tool positioning structure of excavator

technical field

The utility model relates to an excavator, in particular to a cutter positioning structure of the excavator.

Background technique

An excavator is a machine that uses a hub to drive multiple cutters (or gears) to continuously excavate excavated objects, such as: road reconditioning cold recycling machine, road planing machine, mining machine...etc. Please refer to shown in Fig. 1, it is the sectional schematic diagram of the cutter positioning structure of existing excavator, and it comprises a turret 2 that is located on the wheel hub 1 of excavator for cutter 3 erection, and described turret 2 is formed by a base 21 It is combined with a knife seat 22.

Said knife holder 22 has a cutter fixing groove 23 for the insertion of a cutter 3. Generally speaking, the cutter 3 will be made of a special material with higher hardness to excavate the construction site destructively, and the cutter holder 22 It will be made of general alloy material with lower hardness than the cutting tool 3, so as to withstand and disperse the stress generated during the operation of the cutting tool 3, and reduce the industrial cost. However, when the excavator is in operation, the following problems are often involved:

During the normal operation of the excavator, there will be waste soil ore extrusion, forced soil discharge and other processes. During this process, the tool holder 22 will also come into contact with the waste soil ore. Therefore, it is expected that the tool holder 22 will have wear and tear problems. .

Since the cutting tool 3 is the most direct part to bear the instantaneous impact force during the excavation process, after a period of use, the cutting tool fixing groove 23 will often have wear, deformation, hole expansion, etc., so that the positioning of the cutting tool 3 The effect becomes worse, so that the cutting tool 3 is prone to problems such as falling off, flying out, breaking and so on.

When the cutter 3 falls off or flies out, the cutter holder 22 will directly collide with the excavation site, and the material used for the cutter holder 22 is not as hard as the cutter 3, so it will cause a considerable degree of wear, such as the wear area marked in Figure 1 X, even will cause secondary damage to cutter fixing groove 23.

When the wear area X is formed, only the entire tool holder 22 can be replaced, and the tool holder 22 is a large-scale component inserted and fixed on the turret 2, and a lot of industrial costs will be spent on replacement, so it is generally used in the industry. The more common treatment method is to repair and fill the damaged tool seat 22; however, the tool seat 22 after the repair and filling has not only the structural strength not as good as before, but also the wear and tear that has occurred on the tool fixing groove 23. Phenomena such as deformation, reaming, etc., cannot be repaired and filled. Therefore, problems such as cutting tool 3 falling off, flying out, breaking, etc. will still occur.

Therefore, in view of the lack of the prior art, the designer of the present utility model innovates the cutter positioning structure of the excavator to improve the above-mentioned deficiencies of the prior art.

Contents of the invention

The main purpose of this utility model is to provide a cutter positioning structure of an excavator, so that the cutter of the excavator can be positioned stably, and the parts that are easy to wear can be strengthened without affecting the toughness of the whole, and when damage occurs, Also features easy replacement.

In order to achieve the above object, the utility model provides a tool positioning structure for an excavator, which includes a turret provided on the wheel hub of the excavator for tool erection, the end of the turret is provided with a bushing groove, A bushing is pierced through the bushing groove, and the front end of the bushing is provided with a protruding part that is exposed and covers the end of the turret, and the bushing is provided with a tool fixing groove for the tool to be inserted and positioned, and the bushing The material of the cover can be harder than the turret.

In the cutter positioning structure of the above-mentioned excavator, in addition to being integrally formed, the cutter turret may include at least one base fixed on the hub, and one inserted on the base to form the end of the cutter tower. The tool seat; or may include at least one plate fixed on the hub, and an outer bush fixed on the plate to form the end of the turret.

In the tool positioning structure of the above excavator, the end of the bushing can be directly screwed into the bushing groove; or, the bushing groove is a one that goes through the turret, and the end of the bushing passes through the bushing groove and is connected with a nut screw. Or, the bushing groove is through the turret, and the end of the bushing does not pass through the bushing groove, and is screwed with a sleeve cap that passes through the other end of the bushing groove.

In the cutter positioning structure of the excavator, the end of the turret has a concave portion, and the convex portion of the bushing has a corresponding thick portion corresponding to the concave portion.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

1. It can improve the durability and service life of the turret.

2. When the bushing is worn out, the bushing can be replaced directly without replacing the entire turret or large components on the turret to reduce industrial costs.

3. It will not damage the overall toughness of the turret.

4. When the bushing is replaced, the tool fixing groove is also updated at the same time, so as to improve the problem in the background technology that the tool fixing groove cannot be overhauled.

Description of drawings

Figure 1: Schematic cross-sectional view of the tool positioning structure of the existing excavator;

Figure 2: a schematic cross-sectional view of the first embodiment of the utility model;

Figure 3: a schematic cross-sectional view of the second embodiment of the utility model;

Figure 4: a schematic cross-sectional view of the third embodiment of the utility model;

Fig. 5: Three-dimensional exploded view of partial components of the third embodiment of the utility model;

Fig. 6: A schematic cross-sectional view of the fourth embodiment of the utility model.

Explanation of reference signs: 1-wheel hub; 2-turret; 20-outer bushing; 21-base; 27-recessed part; 28-thick part; 29-plate; 3-knife; 4-nut; 5-cap; X-wear area.

Detailed ways

Below according to the technical means of the present invention, enumerate the mode that is suitable for the implementation of the present invention, and cooperate drawing description as follows:

Please refer to Fig. 2, which is a schematic cross-sectional view of the first embodiment of the present utility model, and the cutter positioning structure of the excavator disclosed by it includes a cutter tower 2 provided on the wheel hub 1 of the excavator for the erection of the cutter 3, and the cutter The end of the tower 2 is provided with a bushing groove 24, the bushing groove 24 is pierced with a bushing 25, and the front end of the bushing 25 is provided with a protruding part 26 which is exposed and covers the end of the turret 2 , the tool fixing groove 23 is located in the bush 25 for positioning after the cutter 3 penetrates, and the bush 25 can be implemented with a material with high hardness and high wear resistance, and the end of the bush 25 can be It is directly screwed into the bushing groove 25 for positioning.

Please compare the prior art in Fig. 1 with Fig. 2, the protruding part 26 of the first embodiment of the utility model corresponds to the wear area X, and even covers the remaining parts of the end of the turret 2 that may be worn, so the The end of the tower 2 will not be worn, and when the outer convex portion 26 of the bush or the cutter fixing groove 23 is worn for some reason, only the bush 25 needs to be replaced to keep the cutter 3 in the best positioning effect, and No overhaul or replacement of the entire turret 2 or large components on the turret 2 is required.

Please refer to Fig. 3, which is a schematic cross-sectional view of the second embodiment of the present invention. The entire turret 2 of the present invention can be integrally formed as shown in Fig. 1, and can be fixed on the hub by a The base 21 and a knife seat 22 inserted on the base 21 to form the end of the turret 2 are formed. The bushing groove 24 of this embodiment is for penetrating the turret 2, such as through the entire knife seat 22, and The end of the bushing 25 passes through the bushing groove 24 and is screwed with a nut 4 to be positioned on the turret 2 .

In addition, the end of the turret 2 has a recessed portion 27 (located at the front end of the knife seat 22 in the drawing), and the convex portion 26 has a corresponding thick portion 28 corresponding to the recessed portion 27, so that The range of the thick portion 28 can overlap with the main wear-prone area, and through this cooperation, the bushing 25 can have better positioning and structural strengthening effects.

As shown in Figure 4, it is a schematic cross-sectional view of the third embodiment of the utility model. The turret 2 disclosed in this embodiment includes at least one plate 29 fixed on the hub, and one plate 29 fixed on the hub. The outer bushing 20 used to form the end of the turret, the bushing groove 24 also runs through the turret 2 (through the entire outer bushing 20), and the end of the bushing 25 passes through the bushing groove 24 and is screwed with the nut 4 And located in Dota 2.

Please refer to Fig. 4 and Fig. 5, wherein, Fig. 5 is a three-dimensional exploded view of partial components of the third embodiment of the present utility model, and the end of the turret 2 of the third embodiment also has a recessed portion 27 [located in the drawing The position of the front end of the outer bushing 20], the convex portion 26 has a thick portion 28 corresponding to the concave portion 27, so that the range of the thick portion 28 can overlap with the main wear-prone area, and can also pass through This cooperation enables the bushing 25 to have better positioning and structural strengthening effects.

As shown in Figure 6, it is a schematic cross-sectional view of the fourth embodiment of the utility model, the bushing groove 24 of the fourth embodiment is to penetrate the turret 2, but the end of the bushing 25 does not pass through the bushing groove 24, but is connected with A sleeve cap 5 inserted from the other end of the bushing groove 24 is screwed so that the bushing 25 is positioned on the turret 2 .

To sum up, the utility model strengthens the most severely worn parts during tool operation, not only improves the durability of the turret 2, but when the bushing 25 is worn out, the bushing 25 can be directly replaced without replacing the entire turret 2 or large components on the turret 2 to reduce industrial costs and not destroy the overall toughness of the turret 2; more importantly, when the bushing 25 is replaced, the tool fixing groove 24 is also updated to improve the background Problems derived from the inability of the tool fixing groove 24 to be repaired in the technology.

The above embodiments and the accompanying drawings are the preferred embodiments of the present utility model, as an example of several means and methods of setting the bushing 24 on the wearable part of the turret 2, and the purpose is to make those who are familiar with the art fully understand The main spirit of the present utility model is not intended to limit the present utility model. For example, the shape of the turret 2, the number of components that make up the turret 2, the fixing method between the bushing 25 and the turret 2, etc., can all be seen Changes made according to actual needs do not affect the main spirit of the utility model, and all similar or identical structures, devices, and features of the utility model shall fall within the scope of the claims of the utility model.

Claims (9)

1. A tool positioning structure of an excavator, comprising a turret provided on the wheel hub of the excavator for tool erection, characterized in that: The end of the turret is provided with a bushing groove, and a bushing is pierced in the bushing groove. The front end of the bushing is provided with a protruding part that is exposed and covers the end of the turret, and the bushing is provided with a hole for the tool to pass through. into the tool fixing slot for rear positioning. 2. The tool positioning structure of an excavator according to claim 1, wherein the turret comprises at least one base fixed on the hub, and a tool seat inserted on the base to form the end of the turret . 3. The tool positioning structure of an excavator according to claim 1, wherein the turret comprises at least one plate fixed on the hub, and an outer plate fixed on the plate to form the end of the turret. bushing. 4. The cutter positioning structure of an excavator according to claim 1, wherein the bushing is made of a harder material than the cutter tower. 5. The cutter positioning structure of an excavator according to claim 1, wherein the end of the bush is screwed into the bush groove. 6. The excavator cutter positioning structure according to claim 2 or 3, characterized in that: the bushing groove runs through the turret, and the end of the bushing passes through the bushing groove and is screwed with a nut. 7. The cutter positioning structure of an excavator according to claim 2 or 3, wherein the bushing groove runs through the turret, and the end of the bushing does not pass through the bushing groove and connects with the other end of the bushing groove. The threaded cap is screwed on. 8. The cutter positioning structure of the excavator according to claim 2 or 3, characterized in that: the end of the turret has a concave portion, and the convex portion of the bushing has a matching thickness corresponding to the concave portion department. 9. The cutter positioning structure of an excavator according to claim 1, wherein the cutter tower is formed in one piece.

Images