CN212896577U - Auxiliary tool and excavator - Google Patents

Abstract

The embodiment of the utility model provides an auxiliary fixtures and excavator relates to the engineering machine tool field, and this auxiliary fixtures includes support body and driving cylinder, and the support body is used for installing simultaneously on toothholder and bucket tooth, is provided with the third hole that is used for making the round pin axle to wear to establish on the support body, and the driving cylinder is installed on the support body, and the piston rod of driving cylinder is used for the butt in the round pin axle that is located the third hole to make the round pin axle break away from the third hole, and pass first hole and second hole simultaneously. This excavator includes aforementioned auxiliary fixtures, and this auxiliary fixtures and excavator possess and improve round pin axle installation effectiveness to improve the beneficial effect at the security performance of installation round pin axle in-process.

Description

Auxiliary tool and excavator

Technical Field

The utility model relates to an engineering machine tool field particularly, relates to an auxiliary fixtures and excavator.

Background

The use of present excavator is more and more frequent, and at the in-process that uses the excavator, the bucket tooth is worn and torn easily and is dropped, needs to change the bucket tooth. In the actual working environment, when the bucket tooth is installed, the pin shaft needs to be installed on the bucket tooth and the tooth holder at the same time. Generally, a worker hits the pin shaft using a hammer to mount the pin shaft on the tooth and the block, working efficiency is low, and the worker is easily injured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an auxiliary fixtures and excavator, it can improve the above-mentioned technical problem who mentions effectively.

The embodiment of the utility model is realized like this:

in a first aspect, the embodiment of the utility model provides an auxiliary fixtures, be used for the excavator, the excavator includes toothholder, bucket tooth and round pin axle, the toothholder is provided with first hole, the bucket tooth is provided with the second hole, the bucket tooth cover is located the toothholder, so that the second pore pair first hole, auxiliary fixtures includes support body and driving cylinder, the support body is used for installing simultaneously the toothholder and on the bucket tooth, be provided with the messenger on the support body the third hole that the round pin axle wore to establish, the driving cylinder is installed on the support body, the piston rod of driving cylinder is used for the butt in being located in the third hole the round pin axle, so that the round pin axle breaks away from the third hole to pass simultaneously first hole with the second hole.

In an alternative embodiment, the rack body comprises a first mounting frame and a second mounting frame, the first mounting frame is used for covering the tooth holder and the bucket tooth, and the first mounting frame is used for simultaneously abutting against the tooth holder and the bucket tooth so as to be simultaneously fixed relative to the tooth holder and the bucket tooth;

the third hole is arranged on the first mounting frame, the second mounting frame is connected with the first mounting frame, the second mounting frame is covered on the third hole, and the driving cylinder is arranged on the second mounting frame.

In an optional embodiment, a fourth hole and a fifth hole are further formed in the first mounting frame, the auxiliary tool further comprises a first fastening cylinder and a second fastening cylinder, the first fastening cylinder and the second fastening cylinder are both mounted on the first mounting frame, and a piston rod of the first fastening cylinder is used for penetrating through the fourth hole and abutting against the tooth holder so that the first mounting frame and the tooth holder are relatively fixed;

and a piston rod of the second fastening cylinder is used for penetrating through the fifth hole and abutting against the bucket tooth, so that the first mounting frame and the bucket tooth are relatively fixed.

In an optional embodiment, the number of the first fastening cylinders and the number of the fourth holes are two, the first fastening cylinders correspond to the fourth holes one by one, the two first fastening cylinders are respectively arranged on two opposite sides of the first mounting frame, and piston rods of the two first fastening cylinders are used for respectively penetrating through the corresponding fourth holes and respectively abutting against two opposite sides of the tooth holder.

In an optional embodiment, the number of the second fastening cylinders and the number of the fifth holes are two and are in one-to-one correspondence, the two second fastening cylinders are respectively arranged on two opposite sides of the first mounting frame, and piston rods of the two second fastening cylinders are used for respectively passing through the corresponding fifth holes and respectively abutting against two opposite sides of the bucket tooth.

In an optional embodiment, the auxiliary tool further includes a first fastening clip and a second fastening clip, the first fastening clip is mounted on a piston rod of the first fastening cylinder, the first fastening clip is used for clamping the toothholder, the second fastening clip is mounted on a piston rod of the second fastening cylinder, and the second fastening clip is used for clamping the bucket tooth.

In an optional implementation manner, the excavator further includes a hydraulic system, the auxiliary tool further includes a first direction valve communicated with the inner cavity of the first fastening cylinder and a second direction valve communicated with the inner cavity of the second fastening cylinder, both the first direction valve and the second direction valve are used for being communicated with the hydraulic system, a valve core of the first direction valve is used for enabling a piston rod of the first fastening cylinder to be in different working states at different valve positions, and a valve core of the second direction valve is used for enabling a piston of the second fastening cylinder to be in different working states at different valve positions.

In an optional implementation mode, the excavator further comprises a hydraulic system, the auxiliary tool further comprises a third reversing valve communicated with the inner cavity of the driving cylinder and a speed regulating valve communicated with the inner cavity of the driving cylinder, the third reversing valve is used for being communicated with the hydraulic system, a valve core of the third reversing valve is used for enabling a piston rod of the driving cylinder to be in different working states when the valve core is in different valve positions, and the speed regulating valve is used for changing the flow entering the inner cavity of the driving cylinder so as to regulate the movement speed of the piston rod of the driving cylinder.

In an optional embodiment, the auxiliary tool further comprises an overflow valve, the overflow valve is simultaneously communicated with the inner cavity of the driving cylinder and the hydraulic system, and the overflow valve is used for enabling hydraulic oil in the driving cylinder to flow into an oil tank when the pressure value in the driving cylinder is larger than a preset pressure value.

In a second aspect, an embodiment of the present invention provides an excavator, including any one of the foregoing embodiments of the auxiliary tool.

The utility model discloses beneficial effect includes, for example:

the embodiment of the utility model provides an auxiliary fixtures, this auxiliary fixtures include support body and driving cylinder, are provided with the third hole on the support body, place the round pin axle downthehole at the third earlier, and the driving cylinder is installed on the support body, starts the driving cylinder for the piston rod butt of driving cylinder is in the round pin axle, and pushes the round pin axle in first hole and second downthehole, and like this, can accomplish the installation operation of round pin axle. It can be understood that, the in-process of installation round pin axle, for the installation effectiveness that the hammer striked, the installation effectiveness that the piston rod butt round pin axle of actuating cylinder moved is higher to no longer need the manual work to use the hammer to strike, can avoid the staff to receive the injury in the installation effectively, this auxiliary fixtures's security performance is better.

The embodiment of the utility model provides an excavator is still provided, this excavator includes the aforementioned auxiliary fixtures who mentions to possess whole functions of this auxiliary fixtures. The excavator also has the beneficial effects of improving the installation efficiency of the pin shaft and improving the safety performance in the process of installing the pin shaft.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a tooth holder and a bucket tooth provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the embodiment of the present invention, in which the auxiliary tool is connected to the hydraulic system;

fig. 3 is a schematic structural diagram of the auxiliary tool provided in the embodiment of the present invention.

Icon: 1-auxiliary tool; 11-a frame body; 111-a third aperture; 112-a first mounting frame; 1121-fourth hole; 1122-fifth hole; 113-a second mounting frame; 1131-sixth well; 12-a drive cylinder; 13-a first fastening cylinder; 14-a second fastening cylinder; 15-a second fastening clip; 16-a first reversing valve; 17-a second reversing valve; 18-a third directional valve; 19-a speed regulating valve; 20-an overflow valve; 21-a crossover joint; 3-a tooth holder; 31-a first hole; 4-bucket teeth; 41-a second hole; 5-a pin shaft; 6-hydraulic system.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the present embodiment provides an excavator, which includes a tooth holder 3, a bucket tooth 4, a pin 5, and an auxiliary tool 1, wherein the tooth holder 3 is provided with a first hole 31, and the bucket tooth 4 is provided with a second hole 41. In the process of mounting the tooth 4 on the block 3, the tooth 4 is fitted over the block 3 and the second hole 41 is aligned with the first hole 31.

The auxiliary tool 1 can assist the pin shaft 5 to be installed in the first hole 31 and the second hole 41, so that the installation operation of the tooth holder 3, the bucket tooth 4 and the pin shaft 5 is realized.

Specifically, referring to fig. 1 to 3, in the embodiment, the auxiliary tool 1 includes a frame body 11 and a driving cylinder 12, and in the installation process, the frame body 11 may be simultaneously installed on the tooth holder 3 and the bucket teeth 4, so that the frame body 11, the tooth holder 3 and the bucket teeth 4 are kept relatively fixed, and the subsequent driving cylinder 12 is convenient to push the pin 5.

In this embodiment, the driving cylinder 12 is installed on the frame body 11, the frame body 11 is provided with the third hole 111, the pin 5 is placed in the third hole 111, the driving cylinder 12 is started, the piston rod of the driving cylinder 12 can push the pin 5, and the pin 5 can be pushed into the first hole 31 and the second hole 41, so that the installation operation is completed.

In this embodiment, the third hole 111 has a guiding function for the moving direction of the pin 5. The third hole 111 may be aligned with the first and second holes 31 and 41 when the frame body 11 is mounted on the block 3 and the tooth 4.

It should be noted that, in this embodiment, when installing the pin shaft 5, for the installation efficiency of hammer knocking, the installation efficiency of the piston rod of the driving cylinder 12 abutting against the pin shaft 5 is higher, and the pin shaft does not need to be knocked by a hammer manually, so that the worker can be effectively prevented from being injured in the installation process, and the safety performance of the auxiliary tool 1 is better.

In the present embodiment, the drive cylinder 12 is a cylinder. The excavator further comprises a hydraulic system 6, wherein the drive cylinder 12 can be connected to the hydraulic system 6 of the excavator during installation, and the operating state of the drive cylinder 12 can be controlled by the hydraulic system 6. Like this, this auxiliary fixtures 1 can need not be from taking the power supply, and overall structure is simple, and it is more convenient to use.

In other embodiments, the driving cylinder 12 may be an electric cylinder, an air cylinder, or the like.

Referring to fig. 2 and 3, in the present embodiment, the frame body 11 includes a first mounting frame 112 and a second mounting frame 113, and during the installation process, the first mounting frame 112 covers the tooth holder 3 and the tooth 4 and abuts against the tooth holder 3 and the tooth 4 at the same time, so that the first mounting frame 112, the tooth holder 3, and the tooth 4 can be fixed relatively. Thus, when the pin 5 is installed, the first installation frame 112 is not easy to move relative to the tooth holder 3 and the bucket tooth 4, and the pin 5 is conveniently installed in the first hole 31 and the second hole 41.

In this embodiment, the third hole 111 is formed on the first mounting bracket 112, the second mounting bracket 113 is covered on the third hole 111, and the driving cylinder 12 is mounted on the second mounting bracket 113, so that a certain distance exists between the driving cylinder 12 and the third hole 111 to provide a space for the reciprocating motion of the piston rod of the driving cylinder 12.

It should be noted that, in this embodiment, the first mounting frame 112 and the second mounting frame 113 are both U-shaped frames, which is convenient for manufacturing, and at the same time, is also convenient for placing the pin 5 in the third hole 111. It will be appreciated that, when installed, the two opposite side walls of the first mounting bracket 112 abut against the two opposite sides of the tooth holder 3, and at the same time, the two opposite side walls of the first mounting bracket 112 abut against the two opposite sides of the tooth 4.

In this embodiment, both free ends of the second mounting frame 113 are mounted on the side wall of the first mounting frame 112, the driving cylinder 12 is mounted on the outer wall of the second mounting frame 113, a sixth hole 1131 is provided on the second mounting frame 113, the sixth hole 1131 is aligned with the third hole 111, and the piston rod of the driving cylinder 12 can pass through the sixth hole 1131, so as to extend into the second mounting frame 113 and push the pin 5 in the third hole 111 to move.

Referring to fig. 2 and 3, in the embodiment, the first mounting bracket 112 is further provided with a fourth hole 1121 and a fifth hole 1122, the auxiliary tool 1 further includes a first fastening cylinder 13 and a second fastening cylinder 14, and both the first fastening cylinder 13 and the second fastening cylinder 14 are mounted on the first mounting bracket 112.

Before the pin 5 is attached, the first mounting bracket 112 is placed on the block 3 and the tooth 4 in a covering manner, and then the first fastening cylinder 13 and the second fastening cylinder 14 are activated, so that the piston rod of the first fastening cylinder 13 can pass through the fourth hole 1121 to abut against the block 3. In this way, the first mount 112 and the tooth holder 3 can be relatively fixed. The piston rod of the second fastening cylinder 14 can pass through the fifth hole 1122 and abut against the tooth 4, so that the first mounting bracket 112 and the tooth 4 can be fixed relative to each other.

It can be understood that under the action of the first fastening cylinder 13 and the second fastening cylinder 14, the first mounting bracket 112 is not easily separated from the tooth holder 3 and the tooth 4, so that the subsequent pin 5 can be more accurately pushed into the first hole 31 and the second hole 41.

It should be noted that, in the present embodiment, the number of the first fastening cylinders 13 and the number of the fourth holes 1121 are both two, and are in one-to-one correspondence. The two fourth holes 1121 are respectively disposed at opposite sides of the first mounting bracket 112, and the two first fastening cylinders 13 are respectively mounted at opposite sides of the first mounting bracket 112. Before the pin 5 is installed, the piston rods of the two first fastening cylinders 13 respectively pass through the corresponding fourth holes 1121, so as to extend into the first mounting brackets 112 and abut against two opposite sides of the tooth holder 3 respectively. Therefore, the first mounting frame 112 and the tooth holder 3 can be more stable and are not easy to move relatively.

Similarly, in the present embodiment, the number of the second fastening cylinders 14 and the fifth holes 1122 are two each, and there is a one-to-one correspondence. The two fifth holes 1122 are respectively formed at opposite sides of the first mounting bracket 112, and the two second fastening cylinders 14 are respectively installed at opposite sides of the first mounting bracket 112. Before the pin 5 is installed, the piston rods of the two second fastening cylinders 14 respectively pass through the corresponding fifth holes 1122, so as to extend into the first mounting frame 112 and respectively abut against two opposite sides of the tooth 4. Therefore, the first mounting frame 112 and the bucket tooth 4 can be more stable and are not easy to move relatively.

Referring to fig. 2, in the present embodiment, the auxiliary fixture 1 further includes a first fastening clip (not shown) and a second fastening clip 15, the first fastening clip is mounted on the piston rod of the first fastening cylinder 13, and the first fastening clip can be clamped on the toothholder 3, so as to increase the stability between the first mounting frame 112 and the toothholder 3. The second tightening clamp 15 is mounted on the piston rod of the second tightening cylinder 14. The second fastening clip 15 can be engaged with the tooth 4, so that the stability between the first mounting bracket 112 and the tooth 4 can be increased.

It should be noted that the first fastening cylinder 13 and the second fastening cylinder 14 are both oil cylinders, so that the first fastening cylinder 13 and the second fastening cylinder 14 can also be connected to the hydraulic system 6 of the excavator, and the hydraulic system 6 can control the operating states of the first fastening cylinder 13 and the second fastening cylinder 14.

Of course, in other embodiments, the first fastening cylinder 13 and the second fastening cylinder 14 may be electric cylinders, pneumatic cylinders, etc.

Referring to fig. 2 and 3, in the present embodiment, the auxiliary tool 1 further includes a first direction valve 16, a second direction valve 17, a third direction valve 18, a speed regulating valve 19, and an overflow valve 20.

Specifically, in the present embodiment, the first direction valve 16 communicates with both the inner chamber of the first fastening cylinder 13 and the hydraulic system 6 of the excavator. In this way, the valve core of the first reversing valve 16 can make the piston rod of the first fastening cylinder 13 in different working states at different valve positions.

Taking fig. 2 as an example, the first direction valve 16 in fig. 2 is a three-position direction valve, when the spool of the first direction valve 16 is located at the left position, the hydraulic oil flowing out of the hydraulic system 6 enters the rodless cavity of the first fastening cylinder 13, and the piston rod of the first fastening cylinder 13 gradually extends out of the cylinder body of the first fastening cylinder 13 and finally abuts against the tooth holder 3. When the valve core of the first reversing valve 16 is located at the middle position, the first fastening cylinder 13 is in a pressure maintaining state, and at this time, the first mounting frame 112 and the gear seat 3 are kept relatively fixed, so that the subsequent mounting operation of the pin shaft 5 is facilitated. When the spool of the first directional valve 16 is in the right position, the hydraulic oil flowing out of the hydraulic system 6 enters the rod chamber of the first fastening cylinder 13, and the piston rod of the first fastening cylinder 13 gradually retracts into the cylinder body of the first fastening cylinder 13.

Specifically, in the present embodiment, the second direction valve 17 is communicated with the inner cavity of the second fastening cylinder 14 and the hydraulic system 6 of the excavator, so that the piston rod of the second fastening cylinder 14 can be in different working states when the valve core of the second direction valve 17 is in different valve positions.

In fig. 2, the second directional valve 17 is a three-position directional valve, and when the spool of the second directional valve 17 is located at the right position, the hydraulic oil flowing out of the hydraulic system 6 enters the rodless chamber of the second fastening cylinder 14, and the piston rod of the second fastening cylinder 14 gradually protrudes from the cylinder body of the second fastening cylinder 14 and finally abuts against the tooth 4. When the spool of the second direction valve 17 is located at the neutral position, the second fastening cylinder 14 is in the pressure maintaining state, and at this time, the first mounting bracket 112 and the bucket tooth 4 are kept relatively fixed, so that the subsequent mounting operation of the pin 5 is facilitated. When the spool of the second directional valve 17 is in the left position, the hydraulic oil flowing out of the hydraulic system 6 enters the rod chamber of the second fastening cylinder 14, and the piston rod of the second fastening cylinder 14 gradually retracts into the cylinder body of the second fastening cylinder 14.

Specifically, in the present embodiment, the third direction valve 18 is communicated with the inner cavity of the driving cylinder 12 and the hydraulic system 6 of the excavator, so that the valve core of the third direction valve 18 can enable the piston rod of the driving cylinder 12 to be in different working states at different valve positions.

For example, in fig. 2, when the spool of the third direction change valve 18 is in the left position, hydraulic oil flowing out of the hydraulic system 6 enters the rodless chamber of the drive cylinder 12, and the piston rod of the drive cylinder 12 abuts against the pin 5, pushing the pin 5 into the first hole 31 and the second hole 41. When the spool of the drive valve is in the right position, hydraulic oil from the hydraulic system 6 enters the rod chamber of the drive cylinder 12, and the piston rod of the drive cylinder 12 gradually retracts into the cylinder body of the drive cylinder 12.

In particular, in this embodiment, the governor valve 19 is capable of varying the flow rate into the interior of the drive cylinder 12, so that the movement speed of the piston rod of the drive cylinder 12, and thus the movement speed of the pin 5, can be adjusted.

Specifically, in this embodiment, the overflow valve 20 is simultaneously communicated with the inner cavity of the driving cylinder 12 and the hydraulic system 6, and when the pressure value of the hydraulic oil in the driving cylinder 12 is greater than the preset value, the overflow valve 20 is opened, so that the hydraulic oil in the driving cylinder 12 flows into the oil tank, and the pressure relief protection effect is achieved. The preset value can be set according to actual conditions.

It is understood that in the present embodiment, the first direction valve 16, the second direction valve 17, and the third direction valve 18 operate independently of each other without interfering with each other.

Referring to fig. 2 and 3, in the embodiment, the auxiliary tool 1 further includes an adapter 21, and when the pin 5 needs to be installed by using the auxiliary tool 1, the adapter 21 may be installed on the hydraulic system 6, so that the hydraulic system 6 can provide power for the driving cylinder 12, the first fastening cylinder 13, and the second fastening cylinder 14. After the installation of round pin axle 5 is accomplished, dismantle crossover sub 21 from hydraulic system 6, like this, whole auxiliary fixtures 1 can be placed in the toolbox, convenient to carry to can not cause the influence to the normal work of excavator.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an auxiliary fixtures, is used for the excavator, the excavator includes toothholder (3), bucket tooth (4) and round pin axle (5), toothholder (3) are provided with first hole (31), bucket tooth (4) are provided with second hole (41), bucket tooth (4) cover is located toothholder (3), so that second hole (41) aim at first hole (31), its characterized in that, auxiliary fixtures (1) include support body (11) and driving cylinder (12), support body (11) are used for installing simultaneously in toothholder (3) and on bucket tooth (4), be provided with on support body (11) and be used for making third hole (111) that round pin axle (5) wore to establish, driving cylinder (12) are installed on support body (11), the piston rod of driving cylinder (12) is used for the butt in be located in third hole (111) round pin axle (5), so that the pin (5) is disengaged from the third hole (111) and passes through both the first hole (31) and the second hole (41).

2. The auxiliary tool according to claim 1, wherein the frame body (11) comprises a first mounting frame (112) and a second mounting frame (113), the first mounting frame (112) is used for covering the tooth holder (3) and the bucket tooth (4), the first mounting frame (112) is used for simultaneously abutting against the tooth holder (3) and the bucket tooth (4) so as to be simultaneously fixed relative to the tooth holder (3) and the bucket tooth (4);

the third hole (111) is provided on the first mounting frame (112), the second mounting frame (113) is connected with the first mounting frame (112), and the second mounting frame (113) is covered on the third hole (111), the driving cylinder (12) is installed on the second mounting frame (113).

3. The auxiliary tool according to claim 2, characterized in that a fourth hole (1121) and a fifth hole (1122) are further arranged on the first mounting frame (112), the auxiliary tool (1) further comprises a first fastening cylinder (13) and a second fastening cylinder (14), the first fastening cylinder (13) and the second fastening cylinder (14) are both mounted on the first mounting frame (112), and a piston rod of the first fastening cylinder (13) is used for penetrating through the fourth hole (1121) and abutting against the tooth holder (3) so that the first mounting frame (112) and the tooth holder (3) are relatively fixed;

the piston rod of the second fastening cylinder (14) is used for penetrating through the fifth hole (1122) and abutting against the bucket tooth (4) so that the first mounting frame (112) and the bucket tooth (4) are fixed relatively.

4. The auxiliary tool according to claim 3, wherein the number of the first fastening cylinders (13) and the number of the fourth holes (1121) are two and are in one-to-one correspondence, the two first fastening cylinders (13) are respectively arranged at two opposite sides of the first mounting frame (112), and piston rods of the two first fastening cylinders (13) are used for respectively penetrating through the corresponding fourth holes (1121) and respectively abutting against two opposite sides of the toothholder (3).

5. The auxiliary tool according to claim 3, wherein the number of the second fastening cylinders (14) and the number of the fifth holes (1122) are two and are in one-to-one correspondence, the two second fastening cylinders (14) are respectively arranged on two opposite sides of the first mounting frame (112), and piston rods of the two second fastening cylinders (14) are used for respectively penetrating through the corresponding fifth holes (1122) and respectively abutting against two opposite sides of the bucket tooth (4).

6. An auxiliary tool according to claim 3, characterized in that the auxiliary tool (1) further comprises a first fastening clip and a second fastening clip (15), the first fastening clip is mounted on a piston rod of the first fastening cylinder (13) and is used for clamping the toothholder (3), the second fastening clip (15) is mounted on a piston rod of the second fastening cylinder (14), and the second fastening clip (15) is used for clamping the bucket tooth (4).

7. The auxiliary tool according to claim 3, wherein the excavator further comprises a hydraulic system (6), the auxiliary tool (1) further comprises a first reversing valve (16) communicated with an inner cavity of the first fastening cylinder (13) and a second reversing valve (17) communicated with an inner cavity of the second fastening cylinder (14), the first reversing valve (16) and the second reversing valve (17) are both used for being communicated with the hydraulic system (6), a valve core of the first reversing valve (16) is used for enabling a piston rod of the first fastening cylinder (13) to be in different working states at different valve positions, and a valve core of the second reversing valve (17) is used for enabling a piston of the second fastening cylinder (14) to be in different working states at different valve positions.

8. The auxiliary tool according to claim 1, wherein the excavator further comprises a hydraulic system (6), the auxiliary tool (1) further comprises a third reversing valve (18) communicated with the inner cavity of the driving cylinder (12) and a speed regulating valve (19) communicated with the inner cavity of the driving cylinder (12), the third reversing valve (18) is used for being communicated with the hydraulic system (6), a valve core of the third reversing valve (18) is used for enabling a piston rod of the driving cylinder (12) to be in different working states at different valve positions, and the speed regulating valve (19) is used for changing flow entering the inner cavity of the driving cylinder (12) so as to regulate the movement speed of the piston rod of the driving cylinder (12).

9. The auxiliary tool according to claim 8, characterized in that the auxiliary tool (1) further comprises an overflow valve (20), the overflow valve (20) is communicated with the inner cavity of the driving cylinder (12) and the hydraulic system (6) at the same time, and the overflow valve (20) is used for enabling hydraulic oil in the driving cylinder (12) to flow into an oil tank when the pressure value in the driving cylinder (12) is larger than a preset pressure value.

10. Excavator, characterized in that it comprises an auxiliary tool (1) according to any of claims 1 to 9.

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