CN108643273B - Locating pin, counterweight locating structure, assembly method and excavator - Google Patents
Locating pin, counterweight locating structure, assembly method and excavator Download PDFInfo
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- CN108643273B CN108643273B CN201810745549.1A CN201810745549A CN108643273B CN 108643273 B CN108643273 B CN 108643273B CN 201810745549 A CN201810745549 A CN 201810745549A CN 108643273 B CN108643273 B CN 108643273B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009434 installation Methods 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000011900 installation process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/18—Counterweights
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The application discloses a locating pin, a counterweight locating structure, an assembling method and an excavator, and relates to the technical field of engineering machinery, wherein the locating pin comprises a rod-shaped body, the rod-shaped body comprises a connecting part and a guiding part, and threads are arranged on the outer surface of the connecting part; this counter weight location structure and excavator include balancing weight, mounting platform, above-mentioned locating pin and fastening bolt, can fix a position, installation fast when the balancing weight is installed, and the location is accurate moreover, in the place that needs frequent dismouting balancing weight, can improve work efficiency greatly.
Description
Technical Field
The application relates to the field of engineering machinery, in particular to a locating pin, a counterweight locating structure, an assembly method and an excavator.
Background
The excavator is a multipurpose earth-rock construction machine, mainly used for excavating and loading earth-rock, and can also be used for land leveling, slope repairing, hoisting and other operations, and is widely applied to the construction of various engineering facilities. The balancing weight is one of important parts of the excavator and plays an important role in the stability of the excavator during working.
The road transportation load is strictly limited in North America regions, the temporary method for transporting the overweight excavator is that the balancing weight and the excavator are transported in a split mode, when the excavator is used, the balancing weight is hoisted by a machine or counterweight self-dismounting equipment is designed on the whole excavator, and for the excavator needing frequent transition, the balancing weight needs to be dismounted frequently. Because the excavator balancing weight dead weight is great, installation space is compact, and the mounted position accuracy is high, and the counter weight is placed more difficultly accurately when the balancing weight is installed, causes bolt hole installation deviation too big, is difficult to install the bolt.
Disclosure of Invention
The application aims to provide a positioning pin which is applied to a matching repositioning structure so as to solve the problems that the existing frequently detached balancing weights are difficult to install and place and the installation deviation is overlarge.
The application further aims to provide a counterweight positioning structure and an assembly method, so as to solve the problems that the existing counterweight blocks which are frequently detached are difficult to install and place and have overlarge installation deviation.
The application further aims to provide an excavator, which is used for solving the problems of difficult positioning and installation of the balancing weight of the excavator in the prior art.
The application is realized by the following technical scheme:
the first aspect of the application provides a positioning pin, which comprises a rod-shaped body, wherein the rod-shaped body comprises a connecting part and a guiding part, and the outer surface of the connecting part is provided with threads.
As described above for the locating pin, the guide part has a conical or truncated cone structure.
As with the dowel described above, the connection portion includes a wrench mounting portion located at the end of the thread.
As with the dowel pin described above, the pilot portion includes a cylindrical section at an end of the wrench mounting portion remote from the threads.
The second aspect of the application provides a counterweight positioning structure, which comprises a counterweight, an assembly platform, a positioning pin and a fastening bolt, wherein the positioning pin is the positioning pin;
the balancing weight is provided with a first positioning hole and a first bolt hole, and the first positioning hole is a threaded hole;
the assembly platform is provided with a second positioning hole and a second bolt hole, the threaded end of the positioning pin is positioned in the first positioning hole, and the guide part of the positioning pin is positioned in the second positioning hole;
the fastening bolt passes through the second bolt hole and the first bolt hole to fix the balancing weight and the assembly platform.
As described above, the fit clearance between the second positioning hole and the positioning pin satisfies the following formula:
(A1－a1)/2＜(B1－b1)/2
wherein: a1 is the diameter of the second positioning hole, A1 is the diameter of the cylindrical section of the positioning pin, B1 is the diameter of the second bolt hole, and B1 is the diameter of the fastening bolt.
As for the counterweight positioning structure, the number of the second positioning holes is two, and the second bolt holes are arranged between the two second positioning holes.
The counterweight positioning structure is characterized in that the screw thread model of the first positioning hole is the same as that of the first bolt hole.
A third aspect of the present application provides a method for assembling a counterweight positioning structure, employing the counterweight positioning structure as described above, the counterweight positioning structure mounting method comprising:
screwing the threaded end of the positioning pin into a first positioning hole of the balancing weight;
the balancing weight is close to the mounting position, the balancing weight is vertically lowered, and the balancing weight is automatically adjusted under the guidance of the guide part until the balancing weight mounting surface is attached to the assembly platform;
and installing the balancing weight and the fastening bolt of the assembly platform.
A fourth aspect of the present application provides an excavator comprising a counterweight positioning structure as described above.
The locating pin is provided with the connecting part and the guiding part, when the locating pin is applied to a matching repositioning structure, the connecting part is connected with the balancing weight through threads, the dismounting is convenient, the guiding part can rapidly finely adjust the position of the balancing weight, and the locating installation of the balancing weight is convenient.
The counterweight positioning structure and the excavator can be used for quickly fine-tuning positioning and mounting when the counterweight block is mounted, and are accurate in positioning. When the counterweight positioning structure is assembled, the threaded end of the positioning pin is screwed into the first positioning hole of the counterweight, the counterweight is close to the installation position, the counterweight is vertically lowered, the position of the counterweight is automatically adjusted under the guidance of the guide part until the counterweight installation surface is attached to the assembly platform, and finally the counterweight and the assembly platform fastening bolt are installed, so that the installation method is simple and rapid.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic view of a positioning pin according to an embodiment of the present application;
fig. 2 is a schematic diagram of an assembly structure of a counterweight positioning structure according to an embodiment of the application;
FIG. 3 is a schematic structural diagram of a balancing weight according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an assembly platform according to an embodiment of the present application;
FIG. 5 is a schematic view of a counterweight positioning structure according to an embodiment of the application;
FIG. 6 is an enlarged view of the connection between the locating pin and the counterweight and the assembly platform according to an embodiment of the application.
Reference numerals illustrate:
1-a locating pin; 2-balancing weight;
3-an assembly platform; 11-a connection;
12-a guide; 13-a wrench mounting part;
14-a cylindrical section; 21-a first positioning hole;
22-first bolt holes; 31-a second positioning hole;
32-second bolt hole.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In the description of the present application, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The excavator is a multipurpose earth-rock construction machine, mainly used for excavating and loading earth-rock, and can also be used for land leveling, slope repairing, hoisting and other operations, and is widely applied to the construction of various engineering facilities. The balancing weight is one of important parts of the excavator and plays an important role in the stability of the excavator during working.
The road transportation load is strictly limited in North America regions, the temporary method for transporting the overweight excavator is that the balancing weight and the excavator are transported in a split mode, when the excavator is used, the balancing weight is hoisted by a machine or counterweight self-dismounting equipment is designed on the whole excavator, and for the excavator needing frequent transition, the balancing weight needs to be dismounted frequently. Because the excavator balancing weight dead weight is great, installation space is compact, and the mounted position accuracy is high, and the counter weight is placed more difficultly accurately when the balancing weight is installed, causes bolt hole installation deviation too big, is difficult to install the bolt.
The application provides a locating pin, a counterweight locating structure, an assembly method and an excavator based on the problems.
Some terms in the present application are explained below for understanding by those skilled in the art.
The balancing weight is used for increasing the weight of the balancing weight to keep balance.
The assembly platform, the assembly (excavator) upper platform and the assembly (excavator) upper vehicle are mainly used for the platform integrating power/hydraulic/control and other parts of the power machine.
Chamfering refers to machining of cutting edges and corners of a workpiece into a certain inclined plane.
The locating pin, the counterweight locating structure, the assembly method and the excavator provided by the application are described in detail below with reference to specific embodiments.
Embodiment one:
fig. 1 is a schematic structural diagram of a positioning pin according to an embodiment of the present application, referring to fig. 1, the embodiment provides a positioning pin 1, where the positioning pin 1 includes a rod-shaped body, the rod-shaped body includes a connecting portion 11 and a guiding portion 12, and a thread extending from a first end of the rod-shaped body to a second end of the rod-shaped body is disposed on an outer surface of the connecting portion 11.
In this embodiment, the rod-shaped body is generally a cylindrical rod, the structure of the guide portion 12 is generally a structure with a gradually decreasing diameter, and in this embodiment, the guide portion is in a truncated cone structure, alternatively, in other embodiments, the guide portion may be in a conical structure or a spherical structure, or a chamfer structure formed on the second end of the rod-shaped body, and the specific structure of the guide portion 12 is not particularly limited in this embodiment.
Further, in order to screw the balancing weight conveniently and quickly during the installation of the locating pin 1, the end of the thread in this embodiment has a wrench mounting portion 13, and the wrench mounting portion 13 is a regular hexagonal prism, however, in other embodiments, the wrench mounting portion 13 is not limited to a regular hexagonal prism. In this embodiment, the guiding portion 12 includes a cylindrical section, which is located at an end of the wrench mounting portion 13 remote from the screw thread.
The locating pin is provided with the connecting part and the guiding part, when the locating pin is applied to a matching repositioning structure, the connecting part is connected with the balancing weight through threads, the dismounting is convenient, the guiding part can rapidly finely adjust the position of the balancing weight, and the locating installation of the balancing weight is convenient.
Embodiment two:
fig. 2 is a schematic diagram of an assembly structure of a counterweight positioning structure provided by an embodiment of the application, fig. 3 is a schematic diagram of a counterweight structure provided by an embodiment of the application, and fig. 4 is a schematic diagram of an assembly platform provided by an embodiment of the application. Referring to fig. 1-4, the present embodiment provides a counterweight positioning structure, which includes a counterweight 2, an assembling platform 3, a positioning pin 1 and a fastening bolt, wherein the positioning pin 1 is the positioning pin described in the first embodiment.
The balancing weight 2 is provided with a first positioning hole 21 and a first bolt hole 22, and the first positioning hole 21 is a threaded hole; the assembly platform 3 is provided with a second positioning hole 31 and a second bolt hole 32, the threaded end of the positioning pin 1 is positioned in the first positioning hole 21, and the guide part 12 of the positioning pin 1 is positioned in the second positioning hole 31; the fastening bolts pass through the second bolt holes 32 and the first bolt holes 22 to fix the balancing weight 2 and the assembling platform 3.
For example, the positioning pin 1 includes a rod-shaped body, the rod-shaped body includes a connecting portion 11 and a guiding portion 12, the outer surface of the connecting portion 11 is provided with threads, the guiding portion 12 is in a truncated cone structure in this embodiment, alternatively, the guiding portion 12 may be in a conical structure or a spherical structure in other embodiments, or a chamfer structure formed on the second end of the rod-shaped body, and the specific structure of the guiding portion 12 is not particularly limited in this embodiment.
Further, in order to screw the positioning pin 1 into the weight 2 conveniently and quickly, the end of the screw thread in this embodiment has a wrench mounting portion 13. The wrench mounting part 13 in this embodiment is a regular hexagonal prism, which is convenient for matching with a common wrench to mount the positioning pin 1. The end of the regular hexagonal prism remote from the thread has a cylindrical section 14. In order to ensure that the fastening bolt can be fastened smoothly after the balancing weight 2 is placed in place, further, the dimensions of the second positioning hole 31, the cylindrical section 14, the second bolt hole 32 and the fastening bolt in this embodiment satisfy the following formula:
(A1－a1)/2＜(B1－b1)/2
wherein: a1 is the diameter of the second positioning hole 31, A1 is the diameter of the cylindrical section 14, B1 is the diameter of the second bolt hole 32, and B1 is the diameter of the fastening bolt.
Further, in this embodiment, the number of the second positioning holes 31 is two, the second bolt holes 32 are disposed between the two second positioning holes 31, and in this embodiment, the space between the two second positioning holes 31 is larger, so that the positioning accuracy is further ensured. Further, the first positioning hole 21 has the same thread type as the first bolt hole 22, and has high versatility.
According to the counterweight positioning structure provided by the embodiment of the application, the positioning pin is arranged on the counterweight block through the threads, so that an operator can conveniently observe the relative positions of the positioning pin and the positioning hole on the assembly platform in the counterweight installation process, the counterweight block is rapidly positioned and installed, the installation method is simple and rapid, the positioning is accurate, and the working efficiency can be greatly improved in the place where the counterweight block is frequently assembled and disassembled.
Embodiment III:
the present embodiment provides a method for assembling a counterweight positioning structure, where the counterweight positioning structure described in the second embodiment is adopted, and the method for installing the counterweight positioning structure includes:
screwing the threaded end of the positioning pin into a first positioning hole of the balancing weight;
the balancing weight is close to the mounting position, the balancing weight is vertically lowered, and the balancing weight is automatically adjusted under the guidance of the guide part until the mounting surface of the balancing weight is attached to the assembly platform;
and installing a balancing weight and an assembly platform fastening bolt.
Embodiment four:
fig. 5 is a schematic structural diagram of a counterweight positioning structure provided by an embodiment of the application in a view angle, and fig. 6 is an enlarged structural diagram of a connecting portion between a positioning pin and a counterweight and between the positioning pin and an assembly platform provided by the embodiment of the application. Referring to fig. 1 to 6, the present embodiment provides an excavator, which includes the counterweight positioning structure described in the second embodiment.
For example, the counterweight positioning structure comprises a counterweight 2, an assembling platform 3, a positioning pin 1 and a fastening bolt, wherein the positioning pin 1 is the positioning pin in the first embodiment.
The balancing weight 2 is provided with a first positioning hole 21 and a first bolt hole 22, and the first positioning hole 21 is a threaded hole; the assembly platform 3 is provided with a second positioning hole 31 and a second bolt hole 32, the threaded end of the positioning pin 1 is positioned in the first positioning hole 21, and the guide part 12 of the positioning pin 1 is positioned in the second positioning hole 31; the fastening bolts pass through the second bolt holes 32 and the first bolt holes 22 to fix the balancing weight 2 and the assembling platform 3.
The guide 12 in this embodiment is a chamfer formed on the second end of the rod-shaped body. The chamfer is convenient to process and has low cost.
Further, in order to screw the weight block conveniently and quickly during the installation of the locating pin 1, the end of the thread in this embodiment has a wrench mounting portion 13, preferably a regular hexagonal prism.
Further, the guide portion 12 includes a cylindrical section 14, and the cylindrical section 14 is located at an end of the wrench mounting portion 13 remote from the screw thread.
The locating pins in this embodiment are divided into four regions: the thread section is used for fastening the locating pin on the counterweight locating hole through the thread area; in the process of disassembly and assembly, a spanner applies torque to the positioning pin in the regular hexagonal prism area, so that the positioning pin is unscrewed or screwed up; the cylindrical section is matched with the platform limiting hole to realize counterweight positioning; the round bench section realizes that the counterweight is automatically finely adjusted in position under the action of dead weight, and promotes the positioning of the counterweight.
Further, the fit clearance between the second positioning hole 31 and the positioning pin 1 satisfies the following formula:
(A1－a1)/2＜(B1－b1)/2
wherein: a1 is the diameter of the second positioning hole 31, A1 is the diameter of the cylindrical section 14, B1 is the diameter of the second bolt hole 32, and B1 is the diameter of the fastening bolt.
In this embodiment, by setting the above gap difference, after the balancing weight 2 is placed in place, the relative positions of the first bolt hole 22 of the balancing weight 2 and the second bolt hole 32 of the assembly platform 3 are ensured, and smooth fastening of the fastening bolt is ensured.
Further, in the present embodiment, the number of the second positioning holes 31 is two, and the second bolt holes 32 are provided between the two second positioning holes 31. The second positioning hole 31 of the embodiment of the application can be directly added on the structure of the existing excavator, and the normal use of other parts is not affected. Referring to fig. 3 and 4, on the basis of the existing overall appearance of the excavator, two second positioning holes 31 are added to the assembly platform 3, two first positioning holes 21 are added to the bottom of the balancing weight 2, the positions of the first positioning holes 21 and the second positioning holes 31 and the relative positions of the original threaded mounting holes are accurately ensured through positioning assembly welding tools, and the positioning pin 1 is installed in the first positioning hole 21 at the bottom of the balancing weight 2. Of course, in other embodiments, the number of the second positioning holes 31 may be plural, and the technician may also increase the number of the first positioning holes 21 and the second positioning holes 31 and change the matching position of the positioning pin 1 according to the actual situation.
Further, the thread type of the first positioning hole 21 is the same as the thread type of the first bolt hole 22. In this embodiment, the thread type of the first positioning hole 21 is identical to the thread type of the first bolt hole 22, and the universality is high. The screw thread specification can be enlarged according to actual conditions, and the diameter of the cylindrical section of the locating pin 1 is correspondingly thickened, so that the durability of the locating pin 1 is further improved.
In this embodiment, the method for assembling the counterweight positioning structure of the excavator is as follows:
screwing the threaded end of the positioning pin 1 into the first positioning hole 21 of the balancing weight;
the balancing weight 2 is close to the installation position, the balancing weight 2 is vertically lowered, and the balancing weight 2 is automatically adjusted under the guidance of the guide part until the installation surface of the balancing weight 2 is attached to the assembly platform 3;
and the mounting balancing weight 2 is fastened with the assembling platform 3 through bolts.
The locating pin of the excavator counterweight locating structure is detachably arranged on the counterweight block through the threads, the dismounting mode is simple, in the counterweight block installation process, an operator can conveniently observe the relative positions of the locating pin and the locating hole on the assembly platform, the counterweight block is quickly located and installed, the installation method is simple and quick, the location is accurate, and the working efficiency can be greatly improved in places where the counterweight block is frequently dismounted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (8)
1. A counterweight positioning structure, comprising:
the balancing weight (2), a first positioning hole (21) and a first bolt hole (22) are formed in the balancing weight (2), and the first positioning hole (21) is a threaded hole;
the assembly platform (3) is provided with a second positioning hole (31) and a second bolt hole (32);
the locating pin (1), the locating pin (1) comprises a rod-shaped body, the rod-shaped body comprises a connecting part (11) and a guiding part (12), threads are arranged on the outer surface of the connecting part (11), the connecting part (11) of the locating pin (1) is located in the first locating hole (21), and the guiding part (12) of the locating pin (1) is located in the second locating hole (31);
a fastening bolt passing through the second bolt hole (32) and the first bolt hole (22) to fix the counterweight (2) and the assembly platform (3);
the fit clearance between the second positioning hole (31) and the positioning pin (1) is smaller than the fit clearance between the second bolt hole (32) and the fastening bolt.
2. Counterweight positioning structure according to claim 1, characterized in that the guide (12) is of conical or frustoconical configuration.
3. A counterweight positioning structure according to claim 2, characterized in that the connecting portion (11) includes a wrench mounting portion (13), the wrench mounting portion (13) being located at the end of the thread.
4. A counterweight positioning structure as claimed in claim 3, characterized in that said guide (12) comprises a cylindrical section (14), said cylindrical section (14) being located at an end of said wrench mounting portion (13) remote from said screw thread.
5. The counterweight positioning structure according to any one of claims 1 to 4, characterized in that the number of the second positioning holes (31) is two, and the second bolt holes (32) are provided between the two second positioning holes (31).
6. The counterweight positioning structure according to any one of claims 1 to 4, characterized in that the screw type of the first positioning hole (21) is the same as the screw type of the first bolt hole (22).
7. A method of assembling a counterweight positioning structure, characterized by using the counterweight positioning structure as recited in any one of claims 1 to 6, the counterweight positioning structure assembling method comprising:
screwing the threaded end of the positioning pin (1) into a first positioning hole (21) of the balancing weight;
the balancing weight (2) is close to the mounting position, the balancing weight (2) is vertically lowered, and the balancing weight (2) is automatically adjusted in position under the guidance of the guide part (12) until the mounting surface of the balancing weight (2) is attached to the assembly platform (3);
and installing the balancing weight (2) and the assembling platform (3) to fasten bolts.
8. An excavator comprising the counterweight positioning structure of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745549.1A CN108643273B (en) | 2018-07-09 | 2018-07-09 | Locating pin, counterweight locating structure, assembly method and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745549.1A CN108643273B (en) | 2018-07-09 | 2018-07-09 | Locating pin, counterweight locating structure, assembly method and excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108643273A CN108643273A (en) | 2018-10-12 |
| CN108643273B true CN108643273B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810745549.1A Active CN108643273B (en) | 2018-07-09 | 2018-07-09 | Locating pin, counterweight locating structure, assembly method and excavator |
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| CN (1) | CN108643273B (en) |
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| CN108643273A (en) | 2018-10-12 |
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