阅读说明：本技术 一种挖掘机挖斗轴孔的现场加工装置及其加工方法 (On-site machining device and machining method for shaft hole of excavator bucket ) 是由 赵剑波 孙平 迟树亭 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种挖掘机挖斗轴孔的现场加工装置,包括定位加工机构和锁紧机构,所述定位加工机构包括定位轴、轴承、电机、镗刀和用于定位轴孔中心的定位套,所述定位轴贯穿轴孔,所述定位轴一端与电机连接,另一端与轴承连接,所述轴承通过卡座安装于镗臂上,所述定位套设于定位轴上且放置于轴孔内,所述定位轴上设有与定位套相适配的台阶部；加工装置通过液压机构和镗臂锁紧至挖斗主体上,通过将定位套更换为镗刀实现对轴孔的镗削加工,通过管中管和套中套结构,实现快速夹持和锁紧。本发明还公开了一种挖掘机挖斗轴孔的现场加工方法。本发明公开的一种挖掘机挖斗轴孔的现场加工装置及其方法,保证定位和加工的一致性,提高了轴孔的加工精度。(The invention discloses an on-site machining device for an axle hole of an excavator bucket, which comprises a positioning machining mechanism and a locking mechanism, wherein the positioning machining mechanism comprises a positioning shaft, a bearing, a motor, a boring cutter and a positioning sleeve for positioning the center of the axle hole; the machining device is locked to the bucket body through the hydraulic mechanism and the boring arm, boring machining of the shaft hole is achieved by replacing the positioning sleeve with the boring cutter, and quick clamping and locking are achieved through the pipe-in-pipe and sleeve-in-sleeve structure. The invention also discloses a field processing method of the excavator bucket shaft hole. The field machining device and the method for the shaft hole of the excavator bucket disclosed by the invention can ensure the consistency of positioning and machining and improve the machining precision of the shaft hole.)

1. An on-site processing device for an excavator bucket shaft hole is characterized by comprising a positioning processing mechanism and a locking mechanism, the positioning processing mechanism comprises a positioning shaft (8), a bearing (11), a motor (7), a boring cutter (10) and a positioning sleeve (9) for positioning the center of the shaft hole (30), the positioning shaft (8) penetrates through the shaft hole (30), one end of the positioning shaft (8) is connected with the motor (7), the other end of the positioning shaft is connected with the bearing (11), the positioning sleeve (9) is sleeved on the positioning shaft (8) and is placed in the shaft hole (30), a step part matched with the positioning sleeve (9) is arranged on the positioning shaft (8), the outer surface of the positioning sleeve (9) is provided with taper, the motor (7) is externally connected with a generator, the locking mechanism locks the processing device to the bucket body (5), the shaft hole (30) is bored by replacing the positioning sleeve (9) with the boring cutter (10).

2. The field machining device for the shaft hole of the excavator bucket according to claim 1, wherein the locking mechanism comprises side plates (15), a base (17), an inner sleeve (22), an outer sleeve (23) and a ram (28), the left side plate and the right side plate (15) are respectively arranged on two sides of the machining device, the left base (17) and the right base (17) are respectively connected with the inner sleeve (22) and the outer sleeve (23), the outer wall of the inner sleeve (22) is in clearance fit with the inner wall of the outer sleeve (23), the inner sleeve (22) is in sliding connection with the outer sleeve (23), the inner sleeve (22) is fixedly connected to the side plate (15) on the left side, the outer sleeve (23) is fixedly connected to the side plate (15) on the right side, and the ram (28) is in sliding connection with the base (17).

3. The field machining device for the shaft hole of the excavator bucket of the excavator according to claim 2, wherein the positioning machining mechanism further comprises a left slip (13), a right slip (24), a first limit nail (21) for abutting against the left suspension lug (29) and a second limit nail (31) for abutting against the right suspension lug (29), the left slip (13) is fixedly connected to the inner sleeve (22), the right slip (24) is fixedly connected to the outer sleeve (23), the first limit nail (21) is arranged on the left slip (13), and the second limit nail (31) is arranged on the right slip (24).

4. The on-site machining device for the shaft hole of the excavator bucket of the excavator according to claim 3, wherein the locking mechanism further comprises a boring arm (27), a boring arm support (25) and a locking bolt (26), the boring arm (27) is fixedly connected with the boring arm support (25), the boring arm support (25) is fixedly connected with a ram (28) through the locking bolt (26), the positioning shaft (8) is installed between the left boring arm and the right boring arm (27), and the base (17) drives the boring arm (27) to move left and right through the ram (28) so as to clamp the positioning shaft (8) by the boring arm (27).

5. The field machining device for the shaft hole of the excavator bucket of the claim 4, wherein the locking mechanism further comprises a rotating support (19), a rotating bracket (18) and a small shaft (20), the rotating support (19) is fixedly connected with a ram (28), and the rotating bracket (18) is fixedly connected with a boring arm (27); one end of the small shaft (20) is rotatably connected with the rotating bracket (18), the other end of the small shaft is rotatably connected with the boring arm (27), and the boring arm (27) can rotate along the small shaft (20).

6. The on-site machining device for the shaft hole of the excavator bucket according to claim 5, wherein the boring arm (27) is detachably connected with the boring arm bracket (25) through a fixing bolt (14) and a fastening nut (16).

7. The on-site machining device for the shaft hole of the excavator bucket according to claim 6, wherein a dovetail groove (1701) is formed in the base (17), and the dovetail groove (1701) is in clearance fit connection with the ram (28).

8. The on-site machining device for the shaft hole of the excavator bucket of the excavator according to claim 7, wherein the locking mechanism further comprises an oil cylinder (4), a reversing valve (3), an oil cylinder support (1) and a support shaft (2), the oil cylinder (4) is externally connected with a hydraulic pump, the hydraulic pump is used for controlling the reciprocating motion of the oil cylinder (4), the oil cylinder (4) is connected with the reversing valve (3), the oil cylinder (4) is arranged on the oil cylinder support (1) through the support shaft (2), the oil cylinder support (1) is arranged on the side plate (15), and a piston rod and a cylinder body of the oil cylinder (4) are respectively connected with the left side plate (15) and the right side plate (15) through a piston rod and a cylinder body of the oil cylinder (4).

9. The method for machining the on-site machining device for the shaft hole of the excavator bucket according to claim 8, which is characterized by comprising the following steps of: assembling a machining device, positioning the machining device, locking the machining device, replacing a boring cutter and boring.

10. The machining method of the on-site machining device for the shaft hole of the excavator bucket according to claim 9 is characterized by comprising the following steps of:

step S1, assembling the processing device, specifically including the steps of:

s11, assembling a base (17), placing the inner sleeve (22) and the outer sleeve (23) on the bucket body (5), fixedly installing a left slip (13) on the inner sleeve (22) by using bolts, and respectively assembling the base (17) and the side plate (15) by using the bolts;

s12, assembling a right slip (24), adjusting the position of the right base (17) and the bucket body (5) to ensure that a gap of 5mm exists, and welding the right slip (24) on the outer sleeve (23);

s13, assembling an oil cylinder (4), installing an oil cylinder support (1) and a support shaft (2) on a side plate (15), fixing two ends of the oil cylinder (4) on the oil cylinder support (1) by using bolts, installing a reversing valve (3) on the side plate (15), and connecting the oil cylinder (4) with a hydraulic pump through an oil pipe;

s14, assembling the boring arm (27), connecting the boring arm (27) with the boring arm bracket (25) by using a fixing bolt (14) and a fastening nut (16), mounting the boring arm bracket (25) on a ram (28), and installing the ram (28) into a dovetail groove (1701) on a base (17);

s15, assembling a rotating support (18), installing a rotating support (19) on a ram (28) by using a bolt, welding the rotating support (18) on a boring arm (27), installing a small shaft (20) into holes of the boring arm (27) and the rotating support (18), and adjusting a rotating gap to ensure smooth rotation;

step S2, positioning the processing device, which comprises the following steps:

s21, debugging a positioning shaft (8), installing clamping seats (12) on two sides of a boring arm (27), installing a bearing (11) into the clamping seats (12), installing the positioning shaft (8), adjusting a positioning sleeve (9) and adjusting a positioning center;

s22, debugging a motor (7), installing the motor (7) and a gearbox (6), debugging the rotating speed of the positioning shaft (8), and ensuring the positioning shaft (8) and the positioning sleeve (9) to rotate smoothly;

s23, positioning the machining device, debugging the position of the machining device again to ensure the smooth rotation of the bearing (11), screwing the locking bolt (26), and fixing the positioning shaft (8) and the positioning sleeve (9);

s24, after the position of the positioning shaft (8) is determined, the mounting position of each part is adjusted, the dovetail groove (1701) is ensured to slide smoothly, and the mounting bolt of each part is screwed;

step S3, locking the processing device, the concrete steps are as follows:

s31, adjusting the position of the left slip (13), matching with the right slip (24), adjusting the first limit nail (21) and the second limit nail (31), and ensuring that the first limit nail (21) and the second limit nail (31) are tightly attached to the side surfaces of the left and right hangers (29) of the bucket body (5);

s32, debugging an oil cylinder (4), starting a hydraulic pump, debugging pressure, and ensuring the movement distance of a base (17) and sufficient power drive;

s33, starting the oil cylinder (4) to ensure the clamping force of the side plate (15) to the bucket body (5);

s34, adjusting the pressure of the two oil cylinders (4), ensuring that the side plates (15) are attached to the side surfaces of the bucket main body (5), and locking the machining device;

step S4, replacing the boring cutter (10), which comprises the following steps:

s41, loosening the locking bolt (26), sliding the ram (28) on the two sides, and opening the boring arms (27) on the two sides;

s42, taking out the positioning sleeve (9) and replacing the positioning sleeve with a boring cutter (10);

s43, adjusting the screwing distance of the first limit nail (21) and the second limit nail (31) to ensure the machining position of the boring cutter (10) on the shaft hole (30);

s44, tightening the fixing bolt (14) and the fastening nut (16) and determining the position of the boring cutter (10);

step S5, boring, which comprises the following steps:

s51, starting the motor (7), and trial cutting the shaft hole (30);

s52, adjusting the feed amount according to the trial cutting condition;

s53, machining the shaft hole (30) to the required position;

s54, after boring, loosening the fixing bolt (14) and the fastening nut (16), and taking down the positioning shaft (8) and the boring cutter (10).

And S55, controlling the oil cylinder (4), opening the side plate (15), and taking down the processing device.

Step S6, machining a second group of shaft holes (30), and specifically comprises the following steps:

s61, the positioning shaft (8) is placed in the shaft hole (30) above the hanging lug (29) in the step S2;

s62, adopting the step S3 to lock the processing device;

s63, replacing the boring cutter (10) by adopting the step S4;

s64, adopting the step S5 to bore and process the shaft hole (30) to the required;

and S65, after the processing is finished, taking down the processing device.

Technical Field

The invention relates to the field of daily maintenance of engineering machinery, in particular to a field processing device and a processing method for an excavator bucket shaft hole.

Background

The excavator bucket is a bucket-shaped component used for excavating loose materials such as soil, yellow sand, stones, construction waste and the like, and is a working device which is arranged on the excavator and used for excavating. However, the excavator works in a sediment environment, four shaft hole lubricating points on the bucket hangers are extremely easy to be polluted, and after hard particles enter the shaft holes, the shaft and the lining are in an abrasive particle abrasion state, so that the abrasion of the shaft, the lining and the shaft holes is accelerated, and the shaft, the lining and the shaft holes need to be maintained and replaced in time. Due to wear and deformation of the shaft bore, the boring process is required prior to replacement of the bucket liner.

Moreover, the excavator works in the field, and the condition for replacing the lining on the spot cannot be guaranteed. In order to shorten the replacement time, an operator welds a processing device on the bucket to process the bucket, or heats the bucket to generate thermal expansion deformation, and then takes out the lining in a knocking mode, so that adverse effects are caused on the shape, the size and the metallographic structure of the bucket, and the service life of the bucket is shortened. If the bucket is disassembled and then transported to a workshop for processing, the maintenance time can be greatly increased. In addition, the machine tool needs to be positioned and clamped through the appearance of the bucket, and the positioning precision and the machining precision of the shaft hole cannot be ensured due to the complex deformation generated in the using process of the bucket, so that the machining production efficiency and the economic benefit of the shaft hole of the bucket are reduced.

Therefore, the problems in the prior art need to be solved.

Disclosure of Invention

The invention aims to solve the problems in the background technology and provides an on-site machining device and a machining method for an excavator bucket shaft hole. According to the field processing device and the processing method for the shaft hole of the excavator bucket, provided by the invention, the shaft hole is bored, and the worn bushing and the small shaft are replaced in time, so that a large amount of maintenance time is reduced.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides an on-spot processingequipment in excavator bucket shaft hole, includes location processing agency and locking mechanism, location processing agency includes location axle, bearing, motor, boring cutter and is used for fixing a position the position cover at shaft hole center, the location axle runs through the shaft hole, location axle one end is connected with the motor, and the other end is connected with the bearing, the bearing passes through the cassette and installs on the boring arm, the location ways is located epaxial and is placed in the shaft hole, the location is epaxial to be equipped with the step portion with location cover looks adaptation, the surface of location cover is equipped with the tapering, the external generator of motor, locking mechanism locks this processingequipment to the excavator bucket main part on, realizes the boring processing to the shaft hole through changing the location cover for the boring cutter.

According to the field machining device for the shaft hole of the excavator bucket, the locking mechanism comprises side plates, a base, an inner sleeve, an outer sleeve and a ram, the left side plate and the right side plate are respectively arranged on two sides of the machining device, the left base and the right base are respectively connected with the inner sleeve and the outer sleeve, the outer wall of the inner sleeve is in clearance fit with the inner wall of the outer sleeve, the inner sleeve is in sliding connection with the outer sleeve, the inner sleeve is fixedly connected to the left side plate, the outer sleeve is fixedly connected to the right side plate, and the ram is in sliding connection with the base.

The field processing device for the excavator bucket shaft hole comprises a left slip, a right slip, a first limiting nail used for tightly abutting against a left side hanging lug and a second limiting nail used for tightly abutting against a right side hanging lug, wherein the left slip is fixedly connected to an inner sleeve, the right slip is fixedly connected to an outer sleeve, the first limiting nail is arranged on the left slip, and the second limiting nail is arranged on the right slip.

According to the field machining device for the shaft hole of the excavator bucket, the locking mechanism further comprises a boring arm, a boring arm support and a locking bolt, the boring arm is fixedly connected with the boring arm support, the boring arm support is fixedly connected with the ram through the locking bolt, the positioning shaft is installed between the left boring arm and the right boring arm, the base drives the boring arm to move left and right through the ram, and the boring arm clamps the positioning shaft.

According to the field machining device for the shaft hole of the excavator bucket, the locking mechanism further comprises a rotating support, a rotating support and a small shaft, the rotating support is fixedly connected with the ram, and the rotating support is fixedly connected with the boring arm; one end of the small shaft is rotatably connected with the rotating support, the other end of the small shaft is rotatably connected with the boring arm, and the boring arm can rotate along the small shaft.

According to the field machining device for the shaft hole of the excavator bucket, the boring arm is detachably connected with the boring arm support through the fixing bolt and the fastening nut.

According to the field machining device for the shaft hole of the excavator bucket of the excavator, the base is provided with the dovetail groove, and the dovetail groove is in clearance fit connection with the ram.

The locking mechanism further comprises an oil cylinder, a reversing valve, an oil cylinder support and a support shaft, the oil cylinder is externally connected with a hydraulic pump, the hydraulic pump controls the oil cylinder to reciprocate, the oil cylinder is connected with the reversing valve, the oil cylinder is arranged on the oil cylinder support through the support shaft, the oil cylinder support is arranged on the side plate, and a piston rod and a cylinder body of the oil cylinder are respectively connected with the left side plate and the right side plate through a piston rod and a cylinder body of the oil cylinder.

Based on the same invention concept, the invention also provides a processing method of the field processing device for the shaft hole of the excavator bucket, which comprises the following steps: assembling a machining device, positioning the machining device, locking the machining device, replacing a boring cutter and boring.

Preferably, the method specifically comprises the following steps:

step S1, assembling the processing device, specifically including the steps of:

s11, assembling a base, namely placing the inner sleeve and the outer sleeve on the bucket body, fixedly installing a left slip on the inner sleeve by using bolts, and respectively assembling the base and the side plates by using the bolts;

s12, assembling a right slip, adjusting the position of the right base and the bucket body to ensure that a gap of 5mm exists, and welding the right slip on the outer sleeve;

s13, assembling an oil cylinder, mounting an oil cylinder support and a support shaft on a side plate, fixing two ends of the oil cylinder on the oil cylinder support by using bolts, mounting a reversing valve on the side plate, and connecting the oil cylinder with a hydraulic pump through an oil pipe;

s14, assembling the boring arm, connecting the boring arm with a boring arm support by using a fixing bolt and a fastening nut, mounting the boring arm support on a ram, and installing the ram into a dovetail groove on a base;

s15, assembling a rotating support, installing the rotating support on a ram by using a bolt, welding the rotating support on the boring arm, installing a small shaft into holes of the boring arm and the rotating support, and adjusting a rotating gap to ensure smooth rotation;

step S2, positioning the processing device, which comprises the following steps:

s21, debugging a positioning shaft, installing clamping seats on two sides of a boring arm, installing a bearing into the clamping seats, installing the positioning shaft, adjusting a positioning sleeve and adjusting a positioning center;

s22, debugging a motor, installing the motor and a gearbox, debugging the rotating speed of the positioning shaft, and ensuring the positioning shaft and the positioning sleeve to rotate smoothly;

s23, positioning the machining device, debugging the position of the machining device again to ensure smooth rotation of the bearing, screwing the locking bolt, and fixing the positioning shaft and the positioning sleeve;

s24, after the position of the positioning shaft is determined, adjusting the mounting position of each part, ensuring the smooth sliding of the dovetail groove, and screwing the mounting bolts of each part;

step S3, locking the processing device, the concrete steps are as follows:

s31, adjusting the position of the left slip, matching with the right slip, adjusting the first limit nail and the second limit nail, and ensuring that the first limit nail and the second limit nail are tightly attached to the side surfaces of the left and right hangers of the bucket body;

s32, debugging an oil cylinder, starting a hydraulic pump, debugging pressure, ensuring the movement distance of the base and enough power drive;

s33, starting the oil cylinder to ensure the clamping force of the side plates on the bucket body;

s34, adjusting the pressure of the two oil cylinders to ensure that the side plates are attached to the side surface of the bucket body, and locking the machining device;

step S4, replacing the boring cutter, which comprises the following steps:

s41, loosening the locking bolts, sliding the rams on the two sides, and opening the boring arms on the two sides;

s42, taking out the positioning sleeve and replacing the positioning sleeve with a boring cutter;

s43, adjusting the screwing distance of the first limit nail and the second limit nail, and ensuring the machining position of the boring cutter on the shaft hole;

s44, tightening the fixing bolt and the fastening nut, and determining the position of the boring cutter;

step S5, boring, which comprises the following steps:

s51, starting a motor, and trial cutting the shaft hole;

s52, adjusting the feed amount according to the trial cutting condition;

s53, processing the shaft hole to the required degree;

and S54, loosening the fixing bolt and the fastening nut after boring, and taking down the positioning shaft and the boring cutter.

And S55, controlling the oil cylinder, opening the side plate and taking down the processing device.

Step S6, processing a second group of shaft holes, which comprises the following steps:

s61, the positioning shaft is placed in the shaft hole above the hanging lug in the step S2;

s62, adopting the step S3 to lock the processing device;

s63, replacing the boring cutter by adopting the step S4;

s64, adopting the step S5 to bore and process the shaft hole to the required;

and S65, after the processing is finished, taking down the processing device.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. according to the field processing device for the shaft hole of the excavator bucket, provided by the invention, the shaft hole is directly bored on the bucket body, the field processing can be carried out at any time and any place, the maintenance time is saved, and the production efficiency and the economic benefit are improved.

2. According to the field processing method for the shaft hole of the excavator bucket, the shaft hole is used for positioning, the consistency of positioning and processing is guaranteed, welding deformation and welding stress are not generated in the processing process, and the processing precision of the shaft hole is improved.

3. According to the field processing method for the shaft hole of the excavator bucket, the 'tube-in-tube' structure formed by matching the inner sleeve with the outer sleeve and the guide structure formed by matching the dovetail groove with the ram are used for guiding, so that the movement precision is high; through hydraulic pump control hydro-cylinder, drive the curb plate and realize that quick clamp is tight, simple structure is reliable, has improved processingequipment's stability, and the site operation of being convenient for has also further improved the machining precision in shaft hole.

4. The field machining device for the shaft hole of the excavator bucket can adjust the clamping position and the clamping force according to the actual deformation conditions of different buckets, is reliable in locking and is stable in machining process.

5. The device and the method for on-site machining of the shaft hole of the excavator bucket are not only suitable for the shaft hole of the excavator bucket, but also can be used for on-site operation of machining shaft holes of other engineering machinery.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following will briefly introduce embodiments or drawings used in the description of the prior art, and it is obvious that the following description is only one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.

FIG. 1 is a schematic view of the right side of a lower shaft hole of an on-site machining device for the shaft hole of an excavator bucket provided by the invention;

FIG. 2 is a schematic left side view of a lower shaft hole machined by the on-site machining device for the shaft hole of the excavator bucket provided by the invention;

FIG. 3 is a partially enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of an upper shaft hole machined by the on-site machining device for the shaft hole of the excavator bucket provided by the invention.

In the figure, 1-a cylinder support, 2-a support shaft, 3-a reversing valve, 4-a cylinder, 5-a bucket body, 6-a gearbox, 7-a motor, 8-a positioning shaft, 9-a positioning sleeve, 10-a boring cutter, 11-a bearing, 12-a clamping seat, 13-a left slip, 14-a fixing bolt, 15-a side plate, 16-a fastening nut, 17-a base, 1701-a dovetail groove, 18-a rotating support, 19-a rotating support, 20-a small shaft, 21-a first limiting nail, 22-an inner sleeve, 23-an outer sleeve, 24-a right slip, 25-a boring arm support, 26-a locking bolt, 27-a boring arm, 28-a ram, 29-a hanging lug, 30-an axle hole and 31-a second limiting nail.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1:

referring to fig. 1-3, the field processing device for the shaft hole of the excavator bucket comprises a positioning processing mechanism and a locking mechanism, wherein the positioning processing mechanism comprises a positioning shaft 8, a bearing 11, a motor 7, a boring cutter 10 and a positioning sleeve 9 for positioning the center of the shaft hole 30, the positioning shaft 8 penetrates through the shaft hole 30, one end of the positioning shaft 8 is connected with the motor 7, the other end of the positioning shaft 8 is connected with the bearing 11, the bearing 11 is installed on a boring arm 27 through a clamping seat 12, the positioning sleeve 9 is sleeved on the positioning shaft 8 and placed in the shaft hole 30, a step part matched with the positioning sleeve 9 is arranged on the positioning shaft 8, a taper is arranged on the outer surface of the positioning sleeve 9, the motor 7 is externally connected with a generator, the locking mechanism locks the processing device on the excavator bucket main body 5, and boring processing of the shaft hole 30 is realized by replacing the positioning sleeve 9 with the boring cutter 10.

Preferably, the locking mechanism comprises side plates 15, a base 17, an inner sleeve 22, an outer sleeve 23 and a ram 28, the left side plate 15 and the right side plate 15 are respectively arranged on two sides of the processing device, the left side plate and the right side plate 17 are respectively connected with the inner sleeve 22 and the outer sleeve 23, the outer wall of the inner sleeve 22 is in clearance fit with the inner wall of the outer sleeve 23, the inner sleeve 22 is in sliding connection with the outer sleeve 23, the inner sleeve 22 is fixedly connected to the left side plate 15, the outer sleeve 23 is fixedly connected to the right side plate 15, and the ram 28 is in sliding connection with the base 17.

Preferably, the positioning mechanism further comprises a left slip 13, a right slip 24, a first limit nail 21 for tightly abutting against the left suspension loop 29 and a second limit nail 31 for tightly abutting against the right suspension loop 29, the left slip 13 is fixedly connected to the inner sleeve 22, the right slip 24 is fixedly connected to the outer sleeve 23, the first limit nail 21 is arranged on the left slip 13, and the second limit nail 31 is arranged on the right slip 24.

Preferably, the locking mechanism further comprises a boring arm 27, a boring arm support 25 and a locking bolt 26, the boring arm 27 is fixedly connected with the boring arm support 25, the boring arm support 25 is fixedly connected with a ram 28 through the locking bolt 26, the positioning shaft 8 is installed between the left boring arm 27 and the right boring arm 27, and the base 17 drives the boring arm 27 to move left and right through the ram 28, so that the boring arm 27 clamps the positioning shaft 8.

Preferably, the locking mechanism further comprises a rotating support 19, a rotating bracket 18 and a small shaft 20, wherein the rotating support 19 is fixedly connected with a ram 28, and the rotating bracket 18 is fixedly connected with a boring arm 27; the small shaft 20 is rotatably connected to the rotating bracket 18 at one end and rotatably connected to a boring arm 27 at the other end, and the boring arm 27 is rotatable along the small shaft 20.

Preferably, the boring arm 27 is detachably connected to the boring arm support 25 by the fixing bolt 14 and the fastening nut 16.

Preferably, the base 17 is provided with a dovetail groove 1701, and the dovetail groove 1701 is in clearance fit connection with the ram 28.

Preferably, locking mechanism still includes hydro-cylinder 4, switching-over valve 3, hydro-cylinder support 1 and support axle 2, the external hydraulic pump of hydro-cylinder 4, 4 reciprocating motion of hydraulic pump control hydro-cylinder, switching-over valve 3 is connected to hydro-cylinder 4, hydro-cylinder 4 sets up on hydro-cylinder support 1 through support axle 2, hydro-cylinder support 1 sets up on curb plate 15, the piston rod and the cylinder body of hydro-cylinder 4 are connected with two curb plates 15 about with through the piston rod and the cylinder body of hydro-cylinder 4 respectively.

Example 2:

referring to fig. 1 to 3, a method for machining an on-site machining device for excavator bucket axle holes according to embodiment 1 when machining bottom bores of a first set of axle holes 30 includes the following steps: assembling a machining device, positioning the machining device, locking the machining device, replacing a boring cutter and boring.

Preferably, the method specifically comprises the following steps:

step S1, assembling the processing device, specifically including the steps of:

s11, assembling the base 17, placing the inner sleeve 22 and the outer sleeve 23 on the bucket body 5, fixedly installing the left slip 13 on the inner sleeve 22 by using bolts, and respectively assembling the base 17 and the side plate 15 by using bolts;

s12, assembling the right slip 24, adjusting the position of the right base 17 and the bucket body 5 to ensure that a gap of 5mm exists, and welding the right slip 24 on the outer sleeve 23;

s13, assembling an oil cylinder 4, mounting an oil cylinder support 1 and a support shaft 2 on a side plate 15, fixing two ends of the oil cylinder 4 on the oil cylinder support 1 by using bolts, mounting a reversing valve 3 on the side plate 15, and connecting the oil cylinder 4 with a hydraulic pump through an oil pipe;

s14, assembling the boring arm 27, connecting the boring arm 27 with the boring arm bracket 25 by using the fixing bolt 14 and the fastening nut 16, mounting the boring arm bracket 25 on the ram 28, and installing the ram 28 in the dovetail groove 1701 on the base 17;

s15, assembling the rotating support 18, installing the rotating support 19 on the ram 28 by using a bolt, welding the rotating support 18 on the boring arm 27, installing the small shaft 20 into holes of the boring arm 27 and the rotating support 18, and adjusting a rotating gap to ensure smooth rotation;

step S2, positioning the processing device, which comprises the following steps:

s21, debugging the positioning shaft 8, installing clamping seats 12 on two sides of the boring arm 27, installing the bearing 11 into the clamping seats 12, installing the positioning shaft 8, adjusting the positioning sleeve 9 and adjusting the positioning center;

s22, debugging the motor 7, installing the motor 7 and the gearbox 6, and debugging the rotating speed of the positioning shaft 8 to ensure that the positioning shaft 8 and the positioning sleeve 9 rotate smoothly;

s23, positioning the machining device, debugging the position of the machining device again to ensure the smooth rotation of the bearing 11, screwing the locking bolt 26, and fixing the positioning shaft 8 and the positioning sleeve 9;

s24, after the position of the positioning shaft 8 is determined, the mounting positions of the respective parts are adjusted to ensure that the dovetail grooves 1701 slide smoothly, and the mounting bolts of the respective parts are tightened;

step S3, locking the processing device, the concrete steps are as follows:

s31, adjusting the position of the left slip 13, matching with the right slip 24, adjusting the first limit pin 21 and the second limit pin 31, and ensuring that the first limit pin 21 and the second limit pin 31 are tightly attached to the side surfaces of the left and right hangers 29 of the bucket body 5;

s32, debugging the oil cylinder 4, starting a hydraulic pump (not shown in the figure), debugging pressure, ensuring the movement distance of the base 17 and enough power drive;

s33, starting the oil cylinder 4 to ensure the clamping force of the side plate 15 on the bucket body 5;

s34, adjusting the pressure of the two oil cylinders 4 to ensure that the side plates 15 are attached to the side surface of the bucket main body 5, and locking the machining device;

step S4, replacing the boring cutter 10, which includes the following steps:

s41, loosening the locking bolts 26, sliding the rams 28 on the two sides, and opening the boring arms 27 on the two sides;

s42, taking out the positioning sleeve 9 and replacing the positioning sleeve with the boring cutter 10;

s43, adjusting the screwing distance of the first limit nail 21 and the second limit nail 31 to ensure the processing position of the boring cutter 10 on the shaft hole 30;

s44, tightening the fixing bolt 14 and the fastening nut 16 to determine the position of the boring cutter 10;

step S5, boring, which comprises the following steps:

s51, starting the motor 7, and trial cutting the shaft hole 30;

s52, adjusting the feed amount according to the trial cutting condition;

s53, processing the shaft hole 30 to the requirement;

s54, after boring, loosening the fixing bolt 14 and the fastening nut 16, and removing the positioning shaft 8 and the boring cutter 10.

And S55, controlling the oil cylinder 4, opening the side plate 15 and taking down the processing device.

Referring to fig. 4, when the upper bore of the second group of shaft holes 30 is machined, the specific steps of the step S6 are as follows:

s61, the positioning shaft 8 is placed in the shaft hole 30 above the hanging lug 29 in the step S2;

s62, adopting the step S3 to lock the processing device;

s63, replacing the boring cutter 10 by adopting the step S4;

s64, adopting the step S5 to bore and process the shaft hole 30 to the required degree;

and S65, after the processing is finished, taking down the processing device.

Example 3:

when a 20-ton excavator works in the field and works in a sediment environment for four months, the lining, the pin shaft and the shaft hole 30 of the excavator bucket main body 5 are seriously abraded and need to be replaced on site. The on-site machining device for the shaft hole of the excavator bucket in the embodiment 1 is transported to the site by a transport vehicle, carries a hydraulic pump and an engine on the vehicle, and performs on-site machining and lining replacement of the shaft hole 30. First, the excavator lifts the bucket onto the transport vehicle, detaches the bucket from the excavator, and places the bucket on the transport vehicle. The bucket position was adjusted, and the side surface of the bucket body 5 was clamped by positioning the bucket body by the positioning shaft 8 and the positioning sleeve 9 by the processing method of example 2 with reference to the shaft hole 30 on the upper surface as shown in fig. 3. The hydraulic pump and the engine are connected, and the shaft holes 30 on the 2 bucket bodies 5 are processed simultaneously. The lower shaft holes are further machined, and the rear side of the bucket body 5 is clamped with the shaft holes 30 below the bucket body 5 as a reference, and simultaneously 2 shaft holes 30 below the bucket body 5 are machined. After the shaft hole 30 is machined, a new bushing is installed on site. The excavator is started, the bucket position is adjusted, the bucket body 5 is attached to the excavator through the new pin shaft 20 by the lug 29, and the operation is continued. The processing and the replacement time are 2.5 hours, and compared with 4 hours of processing time by adopting a welding processing device on the bucket, the embodiment saves a large amount of reciprocating maintenance time.

Example 4:

a40-ton excavator carries out old cement ground chiseling operation, so that the pin shaft is broken and the bushing is damaged. Due to the shortage of the construction period, the pin shaft and the bush are urgently required to be replaced on site. The site machining device for the shaft hole of the excavator bucket of the embodiment 1 is transported to the site by using a transport vehicle, and a hydraulic pump and an engine are arranged on the vehicle to carry out site machining and lining replacement of the shaft hole. And (4) starting the excavator, detaching the breaking hammer from the excavator, lifting the matched excavator bucket and placing the bucket on the transport vehicle. The bucket is adjusted to the position shown in figure 3. The positioning shaft 8 is preliminarily positioned by performing the shaft hole 30 by the processing method of example 2. And adjusting the positions of the side plate 15, the first limit nail 21 and the second limit nail 31 to perform final positioning. According to the positioning situation, the hydraulic pump is started, the pipe-in-pipe structure of the inner sleeve 22 and the outer sleeve 23 of the device is adopted for fast clamping, and the mutual position of the device and the bucket body 5 is locked. And (3) loosening the locking bolt 26, sliding the rams 28 on the two sides, opening the boring arms 27 on the two sides, taking out the positioning sleeve 9, and replacing the positioning sleeve with the boring cutter 10. And starting an engine, and driving the boring cutter 10 to process the shaft holes 30 by the gearbox 6, wherein two shaft holes 30 are processed in a group at one time. After the machining is finished, the locking device is loosened, the positioning shaft 8 and the positioning sleeve 9 are adopted, the second group of shaft holes 30 are positioned and clamped again, the boring cutter 10 is replaced, and the shaft holes 30 are machined. After the shaft hole 30 is machined, a new bushing is installed on site. The excavator is started, the bucket body 5 is detached and replaced by the breaking hammer, and the breaking hammer is installed on the excavator through a new pin shaft to continue operation. The processing and replacing time is 3 hours, and compared with 4 hours of processing time by adopting a welding processing device on the bucket, the time is saved, and the operation is ensured to be completed according to the construction period.

The field processing device for the shaft hole of the excavator bucket disclosed by the invention has the advantages that the shaft hole 30 is used for positioning, the positioning and processing consistency is ensured, and the processing precision of the shaft hole 30 is improved; the device can be processed on site at any time and any place, thereby saving the maintenance time and improving the production efficiency and the economic benefit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.