Pin pressing tool for movable arm rear seat pin shaft of excavator

Abstract

The utility model discloses an excavator movable arm rear seat pin shaft pressing tool, which relates to the technical field of excavator assembly, and comprises a base, a pin shaft hoisting mechanism and a pressing pin actuating mechanism, a support frame is fixedly arranged above the base, and the pin shaft hoisting mechanism and the pressing pin actuating mechanism are both arranged on the support frame; the pin shaft hoisting mechanism comprises a swing arm hinged to the supporting frame and a grabbing mechanism at the tail end. The pin pressing executing mechanism comprises an executing cantilever rotationally connected with the supporting frame and a pressing oil cylinder at the tail end, and the pressing oil cylinder is adjusted to be located at the same height with the pin shaft through the executing cantilever and collinear with the pin shaft. The pin shaft is hoisted to the position of the pin shaft hole through the pin shaft hoisting mechanism, the position of the pressing oil cylinder is adjusted through the execution cantilever so that the pressing oil cylinder and the pin shaft can be consistent in height and collinear, the pressing oil cylinder is used for pressing the pin shaft into the pin shaft hole, labor intensity is reduced, assembly of the pin shaft at the tail end of the movable arm is accurately and efficiently completed, and production efficiency is improved. The production efficiency is effectively improved, and meanwhile, the safety risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator assembly technical field, concretely relates to a kind of excavator movable arm rear seat pin shaft press pin tool. BACKGROUND

[0002] The movable arm pin shaft of excavator is used to pivotally install the movable arm to the workpiece on the vehicle body, and the excavating device including the movable arm can rotate around the movable arm pin shaft to complete the operations such as excavating, loading and unloading.

[0003] In the assembly of excavator, since the excavator movable arm rear end pin shaft and the pin shaft hole are in transition fit, a large radial thrust is required to press the pin shaft into the pin shaft hole during actual assembly. In the past assembly process, artificial hammering or manual operation with hydraulic jack is generally used, which is difficult to operate, low in efficiency and time-consuming and labor-consuming. UTILITARY MODEL

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of excavator movable arm rear seat pin shaft press pin tool, which can efficiently and labor-savingly press the excavator movable arm end pin shaft into pin shaft hole, thereby completing the assembly of movable arm end pin shaft and improving production efficiency.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of excavator movable arm rear seat pin shaft press pin tool, including base, pin shaft hoisting mechanism and press pin execution mechanism, the support frame is fixedly installed on the top of the base, the pin shaft hoisting mechanism and press pin execution mechanism are all installed on the support frame;The pin shaft hoisting mechanism includes swing arm and end gripper mechanism for hoisting pin shaft, which is hinged with the support frame;The press pin execution mechanism includes execution cantilever and end compression cylinder for pressing pin shaft into pin shaft hole, which is rotationally connected with the support frame;The compression cylinder adjusts the angle to be collinear with the pin shaft through the execution cantilever.

[0007] As a further implementation, the base includes fixed base plate and extension leg, the extension leg is hinged with the side of fixed base plate, and the extension leg can increase the contact area between the base and the ground when opened.

[0008] As a further implementation, the execution cantilever is rotationally connected with the support frame through first rolling bearing and sleeve, the sleeve is sleeved on the upper part of the support frame, the sleeve is fixedly connected with the inner ring of the first rolling bearing, and the support frame is fixedly connected with the outer ring of the first rolling bearing.

[0009] As a further implementation manner, a first brake disc is arranged outside the sleeve, a first brake cylinder is connected to the first brake disc, the first brake cylinder can drive the first brake disc to move downward and contact and rub the end face of the sleeve, so as to limit the rotating action of the sleeve and brake, and the first brake cylinder is fixedly installed on the support frame.

[0010] As a further implementation manner, the top of the pressing oil cylinder is hung on the execution cantilever through a spring balancer, and the height of the pressing oil cylinder can be adjusted.

[0011] As a further implementation manner, a rotating mechanism is arranged at the top of the support frame, the bottom of the rotating mechanism is rotationally connected with the support frame, and the top of the rotating mechanism is hingedly connected with the swing arm, so that the angle of the pin shaft can be adjusted and the height of the pin shaft can also be adjusted.

[0012] As a further implementation manner, the rotating mechanism comprises a connecting main pipe fixedly connected with the support frame, an upper stand column is connected with the top of the connecting main pipe through a second rolling bearing, and the top of the upper stand column is hingedly connected with the swing arm; and the connecting main pipe is fixedly connected with the support frame through a fixing flange.

[0013] As a further implementation manner, a second brake disc is arranged below the upper stand column, a second brake cylinder is connected to the second brake disc, the second brake cylinder is fixedly connected with the connecting main pipe, and the second brake cylinder can drive the second brake disc to move upward and contact and rub the lower end face of the upper stand column, so as to limit the rotation of the upper stand column and brake.

[0014] As a further implementation manner, one end of the swing arm is hingedly connected with the top end of the upper stand column, and a counterweight is arranged at the extended swing arm, a main hoisting cylinder is arranged at the side of the swing arm close to the counterweight and vertically, and the lower end of the main hoisting cylinder is fixedly connected with the upper stand column; and the telescopic rod of the main hoisting cylinder is connected with the swing arm, so that the angle of the swing arm can be adjusted and the height of the pin shaft can be adjusted.

[0015] As a further implementation manner, an auxiliary hoisting cylinder parallel to the main hoisting cylinder is further arranged inside the upper stand column, the telescopic rod at the top of the auxiliary hoisting cylinder is connected with the swing arm, and the bottom of the auxiliary hoisting cylinder is fixedly connected with the upper stand column; the main hoisting cylinder and the auxiliary hoisting cylinder are adjusted by means of pneumatic balance, and the size of the air pressure is used to realize the rapid movement of the pin shaft.

[0016] As a further implementation manner, a hoisting cantilever is connected to one end of the swing arm, the hoisting cantilever is horizontally arranged, the end of the hoisting cantilever is fixedly connected with the grabbing mechanism, and the grabbing mechanism can grab, fix or release the pin shaft.

[0017] As a further implementation, the swing arm is rotationally connected with the hoisting cantilever through a third rolling bearing and a cantilever brake disc, so that the hoisting cantilever can drive the pin shaft to be finely adjusted in angle, and the stability of the hoisting cantilever is ensured.

[0018] With the above technical scheme, the utility model has the advantages that:

[0019] 1、The pin shaft is hoisted to the position of the pin shaft hole by the pin shaft hoisting mechanism, and the height and position of the pin shaft can be adjusted, the position of the pressing cylinder is adjusted to be consistent with the height of the pin shaft and be collinear by the execution of the pressing execution mechanism, and the pin shaft is pressed into the pin shaft hole by the pressing cylinder, so that the artificial working strength is greatly reduced, the assembly of the pin shaft at the end of the movable arm is accurately and efficiently completed, the production efficiency is effectively improved, and the safety risk is reduced.

[0020] 2、The rotation of the pin shaft hoisting mechanism is realized by the rotating mechanism, so that the position and angle of the pin shaft in the horizontal plane are adjusted to be aligned with the pin shaft hole, and positioning can be quickly and accurately completed.

[0021] 3、The swing arm is controlled by the main and auxiliary hoisting cylinders in a pneumatic balance mode in the utility model, and then the height of the pin shaft is adjusted, so that the pin shaft can be quickly and stably moved.

[0022] 4、The brake discs are installed at the rotation adjustment of the pressing execution mechanism and the rotating mechanism, so that braking during rotation is realized, the stability during operation after positioning is completed is ensured, and the pressing cylinder or the pin shaft is prevented from shaking or being misaligned. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting a part of the specification of the utility model are used to provide a further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model.

[0024] Figure 1 It is a whole structural schematic view of the embodiment of the utility model;

[0025] Figure 2 It is a plane schematic view of the embodiment of the utility model Figure 1 ;

[0026] Figure 3 It is a plane schematic view of the embodiment of the utility model Figure 2 .

[0027] In the drawing: 1, base; 2, pin shaft hoisting mechanism; 3, rotating mechanism; 4, pressing execution mechanism; 5, pin shaft;

[0028] 11, fixed base plate; 12, support frame; 13, extension support leg; 14, T-shaped screw rod;

[0029] 21. Swing arm; 22. Lifting cantilever; 23. Gripping mechanism; 24. Main lifting cylinder; 25. Auxiliary lifting cylinder; 26. Counterweight; 27. Cantilever brake pad;

[0030] 31. Fixed flange; 32. Connecting main pipe; 33. Second rolling bearing; 34. Upper column; 35. Second brake disc; 36. Second brake cylinder;

[0031] 41. Actuating cantilever; 42. Clamping cylinder; 43. First rolling bearing; 44. Sleeve; 45. Spring balancer; 46. Arc-shaped roller; 47. First brake disc; 48. First brake cylinder; 49. Connecting flange. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0034] Example 1

[0035] In one typical embodiment of this application, a tooling for pressing the seat pin of an excavator boom is provided, such as... Figures 1-3 As shown, the device includes a base 1, a pin hoisting mechanism 2, and a pin pressing mechanism 4. A support frame 12 is fixedly installed above the base 1, and both the pin hoisting mechanism 2 and the pin pressing mechanism 4 are installed on the support frame 12. The pin hoisting mechanism 2 includes a swing arm 21 hinged to the support frame and a gripping mechanism 23 at the end, used for hoisting the pin 5. The pin pressing mechanism 4 includes an execution cantilever 41 rotatably connected to the support frame and a pressing cylinder 42 at the end. The pressing cylinder 42 is adjusted to be collinear with the pin through the execution cantilever 41, used to press the pin into the pin hole.

[0036] Specifically, base 1 serves as the mounting foundation for the entire tooling and adopts an extendable base, such as... Figure 2As shown, the base 1 includes a fixed base plate 11 and an extended leg 13, the fixed base plate 11 is installed on the ground through several fixed legs, the two sides of the fixed base plate 11 are symmetrically installed with the extended leg 13, one end of the extended leg 13 is rotatably connected with the fixed base plate 11 through a pin shaft and a shaft sleeve, the pin shaft is fixedly installed at one end of the fixed base plate, and the extended leg can rotate around the pin shaft. When the extended leg is opened, the support length of the fixed base plate can be extended, the contact area of the base with the ground is increased, thereby improving the support stability during the operation of the device and reducing the risk of tipping over; when the extended leg is retracted, it is placed parallel on both sides of the fixed base plate, thereby reducing the floor space. The end of the extended leg 13 is fixed with a T-shaped lead screw 14, and a mounting pad is fixedly arranged at the bottom of the T-shaped lead screw 14 to increase the contact area of the T-shaped lead screw with the ground, thereby further improving the support stability and balance.

[0037] As shown in Figure 1 , a support frame 12 is fixedly installed above the fixed base plate 11 for installing the pin shaft hoisting mechanism and the pin pressing execution mechanism, and a bottom support pipe is welded between the support frame 12 and the fixed base plate 11 to ensure the stability of the structure.

[0038] Specifically, the pin pressing execution mechanism can replace manual operation to press the hoisted boom pin shaft into the pin shaft hole, as shown in Figures 1-2 , the pin pressing execution mechanism 4 is installed on the support frame 12 through a first rolling bearing 43 and a sleeve 44, and can rotate relative to the support frame to adjust the angle. Specifically, the pin pressing execution mechanism 4 includes an execution cantilever 41 and a pressing oil cylinder 42, the execution cantilever is welded by two sections of circular pipes, one end of the execution cantilever 41 is connected with the support frame through the first rolling bearing 43 and the sleeve 44, and the other end hoists the pressing oil cylinder 42. As shown in Figure 2 , one end of the execution cantilever 41 is fixedly connected with the sleeve 44, the sleeve 44 is coaxially sleeved on the support frame 12, the bottom of the sleeve 44 is provided with the first rolling bearing 43, the outer ring of the first rolling bearing is fixedly connected with the support frame, and the inner ring of the first rolling bearing is fixedly connected with the sleeve above through bolts. One side of the sleeve 44 is fixedly connected with the execution cantilever 41 through a connecting flange 49, so that the execution cantilever is connected with the support frame and can rotate relative to the support frame, thereby driving the pressing oil cylinder to adjust the position. In this embodiment, reinforcing ribs are welded at the connection between the two sections of circular pipes of the execution cantilever to improve the connection strength. In order to improve the stability of the execution cantilever during operation, support rib plates are also welded between the two sections of steel pipes and between the steel pipes and the connecting flange. In addition, the bottom end of the execution cantilever 41 is also connected with an arc-shaped rolling piece 46 through a section of horizontal pipe, which is used to abut against the outer circular surface of the support frame to avoid deformation of the execution cantilever.

[0039] As shown in Figure 2 , 3As shown, the sleeve outer side is provided with a first brake disc 47, the first brake disc 47 is fixedly connected with the first brake cylinder 48 and driven by the first brake cylinder 48, the first brake cylinder 48 can drive the first brake disc 47 to move downward and contact and rub with the end face of the lower part of the sleeve 44, so as to limit the rotating action of the sleeve and realize braking. Wherein, the first brake cylinder 48 is fixedly installed on the support frame 12. In the embodiment, since the sleeve inner side is provided with a connecting flange, in order to avoid interference, the first brake disc is provided in the form of a circular arc brake pad on the outer side of the sleeve, so as to prevent the first brake cylinder from colliding with the connecting flange when driving the brake disc to move up and down.

[0040] Specifically, the pressing oil cylinder 42 is hoisted at the end of the execution cantilever, in the embodiment, since the highest output pressure of the hydraulic station of the equipment is 60MPa, the pressing oil cylinder uses a 3rd grade oil cylinder, the cylinder diameter of the pressing oil cylinder is 230mm, the maximum output pressure is 60T, and the requirement of the pressing pin of the boom rear end of 150 tons and below can be met. In order to realize the height adjustment of the pressing oil cylinder and be easy to operate, as shown in Figure 1 、 2 As shown, the top of the pressing oil cylinder 42 is hoisted on the execution cantilever through the spring balancer 45, which is convenient for adjusting the height of the pressing oil cylinder. The spring balancer can use the existing product on the market, and has a safety device, which can be manually locked to avoid the falling of the pressing oil cylinder, and ensure the safety.

[0041] Specifically, the pin shaft pressing pin tool of the embodiment further comprises a rotating mechanism 3 arranged on the top of the support frame, as shown in Figures 1-3 As shown, the rotating mechanism 3 comprises a fixed flange 31, a connecting main pipe 32, a second rolling bearing 33 and an upper stand column 34, the bottom of the connecting main pipe 32 is fixedly installed on the top of the support frame 12 through the fixed flange 31, the upper stand column 34 is arranged above the connecting main pipe 32 and forms a rotating connection with the connecting main pipe 32 through the second rolling bearing 33. Wherein, the connecting main pipe 32 is fixedly connected with the inner ring of the second rolling bearing 33 through interference fit, the upper stand column 34 is fixedly connected with the outer ring of the second rolling bearing 33, and the top of the upper stand column 34 is hingedly connected with the swing arm 21 of the pin shaft hoisting mechanism through the connecting frame, so that the pin shaft hoisting mechanism can be driven to rotate as a whole along the vertical axis by rotating the upper stand column, and the position and angle of the pin shaft in the horizontal plane can be adjusted.

[0042] In order to ensure the stability of the pin shaft after positioning, a second brake disc 35 is arranged outside the connecting main pipe and the fixed flange, the second brake disc 35 is located below the upper stand column 34, the second brake disc 35 is connected with the second brake cylinder 36 and is driven to move up and down by the second brake cylinder 36, the second brake cylinder 36 is fixedly connected with the connecting main pipe 32. When the second brake cylinder drives the second brake disc to move upward and contact and rub with the lower end surface of the upper stand column, the rotation of the upper stand column can be limited to achieve braking, so as to avoid the pin shaft shaking or mispositioning to affect the pin pressing operation. In the embodiment, in order to improve the braking effect, the second brake disc is a ring-shaped brake pad, which increases the contact area with the lower end surface of the upper stand column.

[0043] Specifically, the pin shaft hoisting mechanism adopts a pneumatic hoisting mode to realize the hoisting and position adjustment of the pin shaft, as shown in Figures 1-3 The pin shaft hoisting mechanism 2 includes a swing arm 21, a hoisting cantilever 22 and a grabbing mechanism 23 connected in sequence, and the grabbing mechanism can grab, fix or release the pin shaft. The end of the swing arm 21 away from the hoisting cantilever is hinged to the upper stand column 34 of the rotating mechanism through a connecting frame, the swing arm 21 is extended at the end and provided with a counterweight 26, the height of the grabbing mechanism is adjusted by using the lever principle, and then the height position of the pin shaft is controlled. The swing arm is driven to rotate in the vertical plane by the main hoisting cylinder 24, as shown in Figure 2 , 3 The main hoisting cylinder 24 is installed on the outer side of the rotating mechanism, that is, close to the side of the counterweight, the main hoisting cylinder 24 is vertically arranged, the bottom thereof is fixedly installed on the outer side of the upper stand column 34 through a support rib plate, and the telescopic rod at the top is hinged to the lower end of the swing arm 21, so that the swing of the swing arm can be driven, and the height of the pin shaft hoisting can be adjusted by adjusting the angle of the swing arm. In the embodiment, an auxiliary hoisting cylinder 25 parallel to the main hoisting cylinder is further arranged on the inner side of the rotating mechanism, the top of the auxiliary hoisting cylinder 25 is hinged to the swing arm 21, the installation mode of the auxiliary hoisting cylinder is the same as that of the main hoisting cylinder, and the installation positions of the auxiliary hoisting cylinder and the main hoisting cylinder are symmetrical about the upper stand column. The main hoisting cylinder and the auxiliary hoisting cylinder can be adjusted by pneumatic balance, the quick movement of the pin shaft is realized by using the air pressure, when the swing arm 21 swings around the horizontal axis under the action of the hoisting cylinder 24 and the auxiliary hoisting cylinder 25, the height of the pin shaft 5 is also adjusted until it is flush with the pin shaft hole.

[0044] As shown in Figure 2 , the other end of the swing arm 21 is connected with the horizontally arranged hoisting cantilever 22, in order to further improve the accuracy of the position adjustment of the pin shaft, the hoisting cantilever 22 is rotatably connected with the swing arm 21 through a third rolling bearing, and a cantilever brake pad 27 is arranged to limit the rotation of the two, so that the hoisting cantilever can be manually adjusted in angle and only manually adjusted in angle, and the stability of the pin shaft hoisting is ensured. The distal end of the hoisting cantilever 22 is fixedly connected with the grabbing mechanism 23, and the grabbing mechanism can horizontally fix the pin shaft by taking the cylinder as the power.

[0045] Considering that the excavator movable arm rear end pin shaft needs smaller space and relatively large radial output force, the embodiment can quickly and accurately press the movable arm end pin shaft into the pin shaft hole, thereby completing the assembly of the movable arm end pin shaft, effectively solving the problem of large operation difficulty when the movable arm is pressed, greatly reducing the work intensity and safety risk in the assembly process, and being applicable to the pin pressing work of the 100-300T movable arm rear seat pin shaft, thereby meeting the assembly demand of the large-tonnage excavator.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them, and those skilled in the art should understand that the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tooling for pressing the seat pin of an excavator boom, characterized in that, The device includes a base, a pin hoisting mechanism, and a pin pressing mechanism. A support frame is fixedly installed on top of the base, and both the pin hoisting mechanism and the pin pressing mechanism are mounted on the support frame. The pin hoisting mechanism includes a swing arm hinged to the support frame and a gripping mechanism at the end for hoisting the pin. The pin pressing mechanism includes an execution cantilever rotatably connected to the support frame and a pressing cylinder at the end. The pressing cylinder is adjusted at an angle by the execution cantilever to be collinear with the pin for pressing the pin into the pin hole.

2. The excavator boom seat pin pressing fixture as described in claim 1, characterized in that, The base includes a fixed chassis and an extension leg. The extension leg is hinged to the side of the fixed chassis. When the extension leg is opened, it can increase the contact area between the base and the ground.

3. The excavator boom seat pin pressing tool as described in claim 1, characterized in that, The cantilever is rotatably connected to the support frame via a first rolling bearing and a sleeve. The sleeve is fitted onto the upper part of the support frame and is fixedly connected to the inner ring of the first rolling bearing. The support frame is fixedly connected to the outer ring of the first rolling bearing.

4. The excavator boom seat pin pressing fixture as described in claim 3, characterized in that, A first brake disc is provided on the outer side of the sleeve. The first brake disc is connected to a first brake cylinder. The first brake cylinder can drive the first brake disc to move downward and contact and rub against the end face of the sleeve.

5. The excavator boom seat pin pressing tool as described in claim 1, characterized in that, The top of the clamping cylinder is suspended on the actuator arm by a spring balancer.

6. The excavator boom seat pin pressing fixture as described in claim 1, characterized in that, The top of the support frame is provided with a rotating mechanism, the bottom of which is rotatably connected to the support frame, and the top of which is hinged to the swing arm; the rotating mechanism includes a connecting main tube fixedly connected to the support frame, the top of which is connected to an upper column via a second rolling bearing, and the top of the upper column is hinged to the swing arm.

7. The excavator boom seat pin pressing fixture as described in claim 6, characterized in that, A second brake disc is provided below the upper column. The second brake disc is connected to a second brake cylinder. The second brake cylinder is fixedly connected to the connecting main pipe. The second brake cylinder can drive the second brake disc to move upward and contact and rub against the lower end surface of the upper column.

8. The excavator boom seat pin pressing tool as described in claim 6, characterized in that, One end of the swing arm is hinged to the top of the upper column, and the swing arm is extended to provide a counterweight. A vertically arranged main hoisting cylinder is connected to the side of the swing arm near the counterweight. The lower part of the main hoisting cylinder is fixedly connected to the upper column. The telescopic rod of the main hoisting cylinder is connected to the swing arm.

9. The excavator boom seat pin pressing tool as described in claim 8, characterized in that, An auxiliary hoisting cylinder, parallel to the main hoisting cylinder, is also installed on the inner side of the upper column. The telescopic rod at the top of the auxiliary hoisting cylinder is connected to the swing arm, and the bottom of the auxiliary hoisting cylinder is fixedly connected to the upper column.

10. The excavator boom seat pin pressing tool as described in claim 1, characterized in that, One end of the swing arm is connected to a lifting cantilever, which is horizontally positioned, and the end of the lifting cantilever is fixedly connected to the gripping mechanism; the swing arm and the lifting cantilever are connected by a third rolling bearing and a cantilever brake pad.

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