CN216371985U - Press mounting device matched with large-diameter lining of tractor lifter - Google Patents
Press mounting device matched with large-diameter lining of tractor lifter Download PDFInfo
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- CN216371985U CN216371985U CN202120918551.1U CN202120918551U CN216371985U CN 216371985 U CN216371985 U CN 216371985U CN 202120918551 U CN202120918551 U CN 202120918551U CN 216371985 U CN216371985 U CN 216371985U
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Abstract
The utility model provides a pressure equipment device is used in assembly of tractor lifting mechanism heavy-calibre bush, this pressure equipment device is used for assembling the bush of predetermineeing on tractor lifting mechanism casing downthehole with the heavy-calibre bush, the pressure equipment device includes stud, the assembly pressure head, spacing pressure disk, fixation nut, draw the unit of screwing up of dress nut and peripheral hardware, spacing pressure disk is worn to establish on stud, and the outside at bush hole exit is sealed to spacing pressure disk, stud extends the tip of bush hole and spacing pressure disk in proper order and draws dress nut through threaded connection, the pressure equipment device is through the continuous tightening of the unit of screwing up of peripheral hardware to drawing dress nut, press the dress with the heavy-calibre bush downthehole. The large-caliber bushing assembling device is compact in structure, convenient to operate, safe and efficient, and capable of meeting the requirements of low labor intensity, uniform stress, no limitation of a shell structure and the like of the large-caliber bushing in the assembling process, further reducing the deformation of the large-caliber bushing in the assembling process to the maximum extent, and achieving efficient, rapid and reliable installation.
Description
Technical Field
The utility model relates to the technical field of auxiliary equipment of tractors, in particular to a press-fitting device for a large-diameter bushing of a tractor lifter.
Background
The lifter of the tractor is used for controlling the lifting of the agricultural implement and the working depth during operation. A large-diameter bush is assembled between a lifting shaft and a lifter shell of the tractor lifter. The large-caliber bushing is in interference fit with the lifter shell, and meanwhile, the large-caliber bushing plays roles of reducing friction and supporting and fixing in the rotation of the lifting shaft and the lifter shell, and is equivalent to the purpose of a bearing. The assembly process of the lifter bushing is very important.
The assembly process of the large-diameter bush of the tractor lifter in the prior art mainly comprises two types: 1. hydraulic press-fitting method; the hydraulic press-fitting method is to press a large-diameter bush into a bush hole by means of the pressure of a hydraulic press. Although the installation method is low in labor intensity and high in efficiency, the overall investment of equipment is increased by means of the hydraulic press, so that the production cost is increased, and meanwhile, due to the structural and volume limitations of the hydraulic press, all the bushings cannot be used during installation, and whether the shell structure of the bushing to be installed is allowed or not needs to be considered. For example, in the LP2604 model tractor, the lifter case and the rear transmission case are integrally cast, and therefore, the hydraulic press-fitting method is limited by the structural problem of the lifter case itself, and cannot be used. 2. Copper hammer percussion method; the copper hammer type knocking method is to press the bush into the bush hole by knocking the large-diameter bush tool with a copper hammer. The method has the advantages of low cost, capability of being operated at any time and any place, no limitation to the structural form of the shell of the lifter, but the defects of high labor intensity and low efficiency, and the problem that the stress is difficult to balance when the copper hammer is manually knocked, so that the problem of serious deformation of the bush is brought to the manual knocking, the subsequent assembly of the lifting shaft is influenced (the effective assembly is probably impossible), the deformation and abrasion are caused, and the service life of the lifter of the tractor is further shortened.
Therefore, how to design and manufacture a press fitting device suitable for the interference installation of the large-diameter bush is actually necessary for the smooth and good assembly of the large-diameter bush of the tractor lifter.
Disclosure of Invention
The technical purpose of the utility model is as follows: the press-fitting device for sleeving the large-diameter bush of the tractor lifter is compact in structure, convenient to operate, safe and efficient, and capable of meeting the requirements of low labor intensity, uniform stress, no limitation of a shell structure and the like of the large-diameter bush in the assembling process, further reducing the deformation of the large-diameter bush in the installing process to the maximum extent, and achieving efficient, rapid and reliable installation.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a press-fitting device for sleeving a large-diameter bushing of a tractor lifter is used for assembling the large-diameter bushing in a preset bushing hole on a tractor lifter shell and comprises a double-end stud, an assembling pressure head, a limiting pressure plate, a fixing nut, a pull-fitting nut and an external tightening unit, wherein the assembling pressure head is of a horizontally arranged T-shaped structure, the left end and the right end of the assembling pressure head in the horizontal direction are divided into a large-diameter end and a small-diameter end, the large-diameter end of the assembling pressure head is used for plugging the outer side of an inlet of the bushing hole, the double-end stud horizontally penetrates through the centers of the large-diameter end and the small-diameter end of the assembling pressure head, the end part of the double-end stud extending out of the outer side of the large-diameter end is further in threaded connection with the fixing nut, the small-diameter end of the assembling pressure head is used for sleeving the inner part of the bushing hole, and a sleeve groove for sleeving the large-diameter bushing is further formed in the outer circumference of the tail end of the small-diameter end, the inner diameter of the nesting groove is smaller than that of the large-diameter bushing, and the outer diameter of the large-diameter bushing is not larger than that of the small-diameter end of the assembling pressure head after the large-diameter bushing is sleeved in the nesting groove;
the limiting pressure plate is also arranged on the stud in a penetrating mode, the limiting pressure plate is plugged at the outer side of the outlet of the bushing hole, the stud sequentially extends out of the bushing hole and the end portion of the limiting pressure plate to be connected with a pull-mounting nut through threads, and the press-mounting device continuously screws the pull-mounting nut through the peripheral screwing unit to press and mount the large-caliber bushing in the bushing hole.
Further, the small-diameter end of the T-shaped structure assembling pressure head is of a hollow structure.
Furthermore, the number of the assembling pressure heads is multiple, and different assembling pressure heads are provided with the nesting grooves with different inner and outer diameters.
Furthermore, the tightening unit is a pneumatic tool.
The utility model has the beneficial effects that:
the press-fitting device matched with the large-diameter liner of the tractor lifter has the advantages of simple structure, reasonable design, convenience in use, no requirements such as structural limitation of a shell of the lifter in the use process, compact structure, convenience in operation, safety and high efficiency. When the device is assembled and used, the labor intensity of the large-diameter bushing in the assembling process can be effectively reduced, the large-diameter bushing is guaranteed to be evenly stressed in the assembling process, the deformation of the large-diameter bushing is reduced, the assembling quality is improved, the equipment investment can be reduced, efficient, quick and reliable installation is realized, and the practical effect is good.
Drawings
FIG. 1 is a schematic structural view of a press-fitting device according to the present invention;
FIG. 2 is a schematic structural view of the press-fitting device during use;
reference numerals: 1. the large-diameter liner comprises a large-diameter liner, 2 a tractor lifter shell, 3 a stud, 4 an assembling pressure head, 401 a large-diameter end, 402 a small-diameter end, 403 a nesting groove, 5 a limiting pressure plate, 6 a fixing nut, 7 a pull-mounting nut.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings:
as shown in the drawing, a pressure equipment device is used in assembly of tractor lifting mechanism heavy-calibre bush suit, this pressure equipment device is used for assembling heavy-calibre bush 1 on tractor lifting mechanism casing 2 the bush that predetermines downthehole, pressure equipment device include stud 3, assembly pressure head 4, spacing pressure disk 5, fixation nut 6, draw the unit of screwing up of dress nut 7 and peripheral hardware, stud 3 passes the hole on assembly pressure head 4, the spacing pressure disk 5 in proper order, stud 3's both ends are passed through the screw thread and are realized being connected with fixation nut 6 and draw dress nut 7.
The assembling pressure head 4 is in a horizontally arranged T-shaped structure, the left end and the right end of the assembling pressure head 4 in the horizontal direction are divided into a large-diameter end 401 and a small-diameter end 402, the large-diameter end 401 of the assembling pressure head 4 is used for plugging the outer side of the inlet of the bushing hole, the stud 3 horizontally penetrates through the centers of the large-diameter end 401 and the small-diameter end 402 of the assembling pressure head 4, the end part of the stud 3 extending out of the large-diameter end 401 is further in threaded connection with a fixing nut 6, the through hole in the center of the assembling pressure head 4 is in a unthreaded hole structure, the small-diameter end 402 of the assembling pressure head 4 is used for being sleeved in the bushing hole, the small-diameter end 402 is in a hollow structure, the tail end of the outer circumference of the small-diameter end 402 is further provided with a nesting groove 403 for being sleeved with the large-diameter bushing 1, the number of the assembling pressure heads 4 is multiple, and different assembling pressure heads 4 are provided with nesting grooves 403 with different inner and outer diameters, the inner diameter of the nesting groove 403 is smaller than the inner diameter of the large-diameter bushing 1, and after the large-diameter bushing 1 is nested in the nesting groove 403, the outer diameter of the large-diameter bushing 1 is not larger than the outer diameter of the small-diameter end 402 of the assembling pressure head 4;
When the press-fitting device matched with the large-diameter bushing of the tractor lifter is used specifically, the large-diameter bushing 1 is firstly sleeved on the embedded groove 403 turned at the small-diameter end 402 of the assembling pressure head 4, then the large-diameter bushing 1 on the assembling pressure head 4 is aligned with a preset bushing hole on the tractor lifter shell 2, then the fixing nut 6 is screwed on the left end of the stud bolt 3, the right end of the stud bolt 3 sequentially penetrates through the hole on the assembling pressure head 4 and extends out from the other side of the bushing hole, the extended right end is firstly sleeved with the upper limiting pressure plate 5, and then the pull-fitting nut 7 is screwed on the right end thread of the stud bolt 3, so that the initial assembly is completed. Then, a fixed nut 6 at the left end of the stud bolt 3 is clamped by a solid wrench, a pull-on nut 7 at the right end of the stud bolt 3 is continuously screwed by a pneumatic tool, and the assembly pressure head 4 presses the large-diameter bush 1 into a bush hole in the tractor lifter shell 2 by virtue of the pulling force between the stud bolt 3 and the pull-on nut 7 along with the continuous screwing of the pneumatic tool on the pull-on nut 7. After the installation is finished, the fixing nut 6 and the pull-mounting nut 7 are loosened, and the limiting pressure plate 5, the stud 3, the assembly pressure head 4 and other structures are sequentially taken down, so that the press-mounting work of the large-diameter bush 1 is completed.
The press-fitting device is matched with the large-diameter bushing of the tractor lifter, and in the process of assembling the large-diameter bushing, the tension of the double-end stud is used for replacing the impact force of a copper hammer (the pressure of a hydraulic press) to assemble. The large-diameter bushing is evenly stressed in the assembling process, the deformation of the large-diameter bushing is avoided, the assembling quality is improved, meanwhile, the labor intensity is reduced, the investment of equipment is reduced, and the large-diameter bushing has the advantages of compact structure, convenience in operation, safety and high efficiency.
Claims (4)
1. The utility model provides a pressure equipment device is adapted to tractor lifting mechanism heavy-calibre bush suit, this pressure equipment device is used for assembling heavy-calibre bush (1) on tractor lifting mechanism casing (2) the bush that predetermines downthehole, its characterized in that: the press fitting device comprises a stud (3), an assembling pressure head (4), a limiting pressure plate (5), a fixing nut (6), a pulling nut (7) and a peripheral screwing unit, wherein the assembling pressure head (4) is of a horizontally arranged T-shaped structure, the left end and the right end of the assembling pressure head (4) in the horizontal direction are divided into a large-diameter end (401) and a small-diameter end (402), the large-diameter end (401) of the assembling pressure head (4) is used for plugging the outer side of an inlet of a lining hole, the stud (3) horizontally penetrates through the centers of the large-diameter end (401) and the small-diameter end (402) of the assembling pressure head (4), the end part of the stud (3) extending out of the large-diameter end (401) is further in threaded connection with the fixing nut (6), and the small-diameter end (402) of the assembling pressure head (4) is used for being sleeved into the inner part of the lining hole, an embedding groove (403) for sleeving the large-diameter bushing (1) is further formed in the outer circumference of the tail end of the small-diameter end (402), the inner diameter of the embedding groove (403) is smaller than that of the large-diameter bushing (1), and after the large-diameter bushing (1) is sleeved in the embedding groove (403), the outer diameter of the large-diameter bushing is not larger than that of the small-diameter end (402) of the assembling pressure head (4);
spacing pressure disk (5) also wear to establish on stud (3), and spacing pressure disk (5) shutoff is in the outside of bush hole exit, stud (3) extend in proper order the tip of bush hole and spacing pressure disk (5) through threaded connection pull-fit nut (7), pressure equipment device through the continuous tightening of the unit of screwing up of peripheral hardware to pull-fit nut (7), with heavy-calibre bush (1) pressure equipment downthehole at the bush.
2. The press-fitting device for the large-diameter bush set of the tractor lifter according to claim 1, wherein: the small-diameter end (402) of the T-shaped structure assembling pressure head (4) is of a hollow structure.
3. The press-fitting device for the large-diameter bush set of the tractor lifter according to claim 1, wherein: the number of the assembling pressure heads (4) is multiple, and different assembling pressure heads (4) are provided with nested grooves (403) with different inner and outer diameters.
4. The press-fitting device for the large-diameter bush set of the tractor lifter according to claim 1, wherein: the tightening unit is a pneumatic tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918551.1U CN216371985U (en) | 2021-04-29 | 2021-04-29 | Press mounting device matched with large-diameter lining of tractor lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918551.1U CN216371985U (en) | 2021-04-29 | 2021-04-29 | Press mounting device matched with large-diameter lining of tractor lifter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216371985U true CN216371985U (en) | 2022-04-26 |
Family
ID=81215447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120918551.1U Active CN216371985U (en) | 2021-04-29 | 2021-04-29 | Press mounting device matched with large-diameter lining of tractor lifter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216371985U (en) |
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2021
- 2021-04-29 CN CN202120918551.1U patent/CN216371985U/en active Active
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