JPH07305381A - Toothed bucket - Google Patents

Abstract

PURPOSE:To enable either a horizontal or vertical pin type locking methods to be selected as required. CONSTITUTION:A vertical pin hole 16 and a horizontal pin hole 17 are bored vertically and horizontally through an adapter 13 secured to the front edge of a bucket main body 12 and through the tongue-and-groove joint of teeth 14 joined to the adapter 13 by the tongue and groove joint. A lock pin 15 is inserted into either the vertical pin hole 16 or the horizontal pin hole 17 to lock the adapter 13 and the teeth 14 in a joined state. Therefore, the user can freely select either a vertical pin type locking method that aims at junction strength or a horizontal pin type locking method that aims at replaceability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a lock pin for locking the adapter of the bucket body and the male and female fitting portions of the tooth.
The present invention relates to a bucket with a tooth that can be inserted into a vertical pin hole or a horizontal pin hole.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view showing the appearance of a conventional bucket with teeth. Bucket with tooth 1 shown
Is used for excavating earth and sand and rocks by connecting to the arm tip of a construction machine such as a hydraulic excavator.
Multiple adapters (5 here) on the front edge of the
Each tooth 4 is assembled by male and female fitting. The adapter 3 has a bifurcated shape as shown in FIG. 5, is inserted into the bucket body 2 so that the tip end portion of the bottom plate 2a is sandwiched between the bifurcated portions, and is fixed to the bottom plate 2a by welding. On the front surface of the adapter 3, male parts 3a corresponding to the number of the teeth 4 are projected at regular intervals, and for the tooth 4 having a hollow part 4a opening to the rear, the male part is formed in the hollow part 4a. By fitting 3a, the adapter 3 and the tooth 4 are fitted to each other with a slight gap. Side teeth 5 are bolted and fixed to the left and right side surfaces of the bucket body 2, but most of the reaction force received from the earth and sand or rock during excavation acts on the teeth 4 instead of the side teeth 5, and most of them are the male and female fittings described above. Focus on the joint.

As shown in FIG. 6, a lateral pin hole 6 is formed in the male and female fitting portions of the adapter 3 and the tooth 4 so as to penetrate the tooth 4 and the adapter 3 in the lateral direction. The fitting state of the tooth 4 and the adapter 3 is locked by inserting the lock pin 7 into 6, and this is the reason why it is called a horizontal pin type lock system. Reference numeral 8 denotes a retainer for preventing the lock pin 7 from coming off. The retainer 8 is fitted into, for example, an annular seat 6a formed by cutting the peripheral edge of the opening of the lateral pin hole 6 on the left side surface of the adapter 3 to prevent the lock pin 7 from coming off. Functions as a spring washer. That is, the retainer 8 is fitted into the annular seat 6 a before fitting the tooth 4 into the adapter 3, and when the tooth 4 is fitted into the adapter 3 and the lock pin 7 is inserted into the lateral pin hole 6, the retainer 8 is locked. Lock 7 in place. In the case of this example, the lock pin 7 has a shallow annular groove 7a formed at the locking position of the retainer 8, and the lock pin 7 is prevented from coming off by tightly fitting the retainer 8 in the annular groove 7a. It has become so. Therefore, when inserting the lock pin 7 into the lateral pin hole 6, the annular groove 7a
Is inserted into the horizontal pin hole 6 with the end face close to. For this reason, the tip of the lock pin 7 advances while expanding the retainer 8 from the inside, but when the entire lock pin 7 is set in the lateral pin hole 6, the retainer 8 is tightly fitted in the annular groove 7a.

By the way, when the tooth 4 is attached to the adapter 3, there are two problems, namely, durability related to abrasion resistance and impact strength, and workability related to work difficulty when replacing the tooth 4. In view of these problems, various locking methods other than the above have been proposed.
For example, a bucket 9 with a tooth, a part of which is shown in FIG. 7, differs from the bucket 1 with a tooth in the insertion direction of the lock pin 7 by 90 degrees, and FIG. 8 shows a male and female fitting portion of the tooth 4 and the adapter 3. As shown in the vertical section, the lock pin 7 is inserted into the vertical pin hole 10 that vertically penetrates the male and female fitting portion, and the retainer 8 fitted into the annular seat 10a on the bottom surface of the male portion 3a of the adapter 3 is the lock pin. The lock pin 7 is tightly fitted in the annular groove 7a of the lock lever 7 and is prevented from coming off.

[0005]

The conventional bucket with tooth 1 of the horizontal pin type lock system, in which the lock pin 7 is inserted into the horizontal pin hole 6 to lock the connected state of the tooth 4 and the adapter 3, is a vibration during excavation. Although it has the advantage of being strong and difficult to drop out, the work of removing and installing the lock pin 7 is not easy when replacing the tooth 4, and there is a problem that it may take a lot of time and effort to remove the lock pin 7 especially in the case of a small construction machine with a narrow pin interval. there were. On the other hand, in the conventional bucket 9 with a tooth of the vertical pin type lock system in which the lock pin 7 is inserted into the vertical pin hole 10 to lock the connected state of the tooth 4 and the adapter 3, the lock pin 7 can be attached and detached relatively easily. However, there were problems such as weakness in vibration during excavation and easy fall off during use.

Further, although the vertical pin type lock system and the horizontal pin type lock system have advantages and disadvantages, respectively, it is difficult to make superior or inferior ones. However, whether the horizontal pin type lock system or the vertical pin type lock system is adopted is In most cases, it depends on the product planning policy of the manufacturer, and there is a problem that it is not possible to satisfy all the preferences of the user.

Therefore, an object of the present invention is to allow both horizontal pin type and vertical pin type to be arbitrarily selected as a locking system when the tooth is mounted on the adapter.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a bucket body, an adapter secured to the front edge of the bucket body,
A tooth that is assembled by fitting the male and female to the adapter,
A vertical pin hole and a horizontal pin hole that are formed by penetrating the tooth and the male and female fitting portions of the adapter in the vertical and horizontal directions, and inserted and locked in either the vertical pin hole or the horizontal pin hole, and the adapter and the The above object is achieved by providing a bucket with a tooth, which is provided with a lock pin for locking the tooth in a fitted state.

Further, according to the present invention, the vertical pin hole and the horizontal pin hole are
The object is achieved by providing a bucket with teeth characterized in that the inner diameter and the penetration length are substantially the same.

Furthermore, the present invention is characterized in that the vertical pin holes and the horizontal pin holes respectively have annular seats of the same shape for holding the retainers for preventing the inserted lock pins from coming off and locking. The above object is achieved by providing an attached bucket.

[0011]

According to the above construction, the vertical pin hole and the horizontal pin hole are vertically and horizontally penetrated through the adapter fixed to the front edge of the bucket body and the male and female fitting portion of the tooth assembled and fitted to the adapter. The lock pin by inserting the lock pin into either the vertical pin hole or the horizontal pin hole to lock the adapter and the tooth in the fitted state. Also be able to select at will.

[0012]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing the external appearance of an embodiment of a bucket with a tooth of the present invention, and FIG.
The side view which shows the fitting part of the bucket main body and tooth shown in FIG. 3, and FIG. 3 is a sectional arrow view taken along the line III-III of FIG.

A toothed bucket 11 shown in FIG. 1 has an adapter 13 fixed to a bottom plate 12a of a bucket body 12.
It is characterized in that the lock pin 15 for connecting the tooth 14 and the tooth 14 can be arbitrarily inserted in any of vertical and horizontal directions and can be commonly used regardless of the inserting direction. That is, as shown in FIG. 2, the male part 13a of the adapter and the hollow part 1
A vertical pin hole 16 and a horizontal pin hole 17 are bored vertically and horizontally in the male and female fitting portion of the tooth 14 assembled by fitting the male and female 4a, and the vertical pin hole 16 or the horizontal pin hole 17 is formed.
The lock pin 15 is inserted and locked in either one of them to lock the adapter 13 and the tooth 14 in a fitted state.

In the case of the embodiment, the adapter 13 is also a tooth 14.
Also, as shown in FIG. 3, the male / female fitting portion has an aspect ratio of 1: 1.
It has a square cross section, and has a vertical pin hole 16 and a horizontal pin hole 1.
7 are orthogonal to each other and crossed. Therefore, the vertical pin hole 16 and the horizontal pin hole 17 have the same inner diameter and the same penetrating length, and the lock pin 15 can be commonly used. Also, regarding the retainer 18 that locks the inserted lock pin 15 so as not to come off, annular seats 16a and 17a for holding the retainer 18 are formed in the same shape at the opening edge portions of the vertical pin hole 16 and the horizontal pin hole 17, respectively. Since the lock pin 15 is formed with a counterbore, and the annular groove 15a is formed at a predetermined position, the lock pin 15 can be commonly used.
8 can also use the same product for the vertical pin hole 16 and the horizontal pin hole 17.

By the way, the lock pin 15 is attached to the lateral pin hole 17
When the tooth 14 is connected to the adapter 13 by the horizontal pin type lock method, it is somewhat difficult to attach and detach the lock pin 15 when replacing the tooth 14,
The advantage is that it is resistant to vibration during excavation and the tooth does not easily fall off. Further, when the lock pin 15 is inserted into the vertical pin hole 16 and the tooth 14 is coupled to the adapter 13 by the vertical pin lock method, there is a disadvantage that the tooth 14 is vulnerable to vibration during excavation and the tooth 14 is easily dropped. However, even a small construction machine with a narrow pin interval can be easily detached and attached. Also, based on the advantages and disadvantages of both the vertical pin lock method and the horizontal pin lock method, the user can select one lock method according to his or her preference, so that the conventional user Is not restricted by the fact that only one lock method can be selected. Moreover, since the lock pin 15 or the retainer 18 common to both lock methods is provided, there is an adverse effect that component management becomes complicated as the selection range is expanded. Will not invite.

[0016]

As described above, according to the present invention,
To prioritize durability, insert the lock pin into the horizontal pin hole and connect the tooth to the adapter.To prioritize workability during replacement, insert the lock pin into the vertical pin hole. It is only necessary to connect the tooth to the adapter, and the user can freely select the vertical pin type lock system or the horizontal pin type lock system according to each taste, so that it is possible to meet the needs of a wide range of users. Play.

In the present invention, the vertical pin hole and the horizontal pin hole are
Since the inner diameter and the penetration length are almost the same as each other, the lock pin can be commonly used for the vertical pin hole and the horizontal pin hole. For example, the cross-sectional shape of the male and female fitting parts of the adapter and the tooth are both square cross sections. And the vertical pin hole and the horizontal pin hole are bored vertically and horizontally with the same inner diameter so as to equally divide the four sides of this square cross section, so that the lock pin can be easily shared. Play.

Furthermore, according to the present invention, the vertical pin holes and the horizontal pin holes respectively have annular seats of the same shape for holding the retainers for preventing the inserted lock pins from coming off. It is possible to use a common retainer for the hole and the horizontal pin hole, and by providing this annular seat at the same axial position of the vertical pin hole and the horizontal pin hole, the specifications of the retainer annular groove formed on the lock pin Since there is no need to prepare two types of lock pins for vertical pin holes and horizontal pin holes, the number of parts can be increased without increasing the number of parts.
This has the effect of providing a wide selection of options to the user.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment of a bucket with a tooth according to the present invention.

FIG. 2 is a side view showing a fitting portion between the bucket body and the tooth shown in FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view showing the appearance of an example of a conventional bucket with teeth.

5 is a side view showing a fitting portion between the bucket body and the tooth shown in FIG. 4. FIG.

6 is a cross-sectional arrow view taken along the line VI-VI of FIG.

FIG. 7 is a side view showing a fitting portion of a bucket body and a tooth in another example of a conventional bucket with a tooth.

FIG. 8 is a cross-sectional arrow view taken along the line VIII-VIII of FIG.

[Explanation of symbols]

 11 Bucket with tooth 12 Bucket body 13 Adapter 14 Tooth 15 Lock pin 16 Vertical pin hole 17 Horizontal pin hole 18 Retainer

Claims (3)

[Claims] 1. A bucket main body, an adapter fixed to a front edge portion of the bucket main body, a tooth to be assembled by mating the male and female with the adapter, and a male and female fitting portion of the tooth and the adapter penetrating vertically and horizontally. A vertical pin hole and a horizontal pin hole that are bored by the above-described method; and a lock pin that is inserted and locked in either the vertical pin hole or the horizontal pin hole to lock the adapter and the tooth in a fitted state. Bucket with tooth. 2. The bucket with teeth according to claim 1, wherein the vertical pin hole and the horizontal pin hole have substantially the same inner diameter and penetrating length. 3. The bucket with a tooth according to claim 1, wherein the vertical pin hole and the horizontal pin hole each have an annular seat of the same shape that holds a retainer that holds and locks the inserted lock pin. The bucket with a tooth, characterized in that