Multifunctional puller with extended function

Abstract

The utility model discloses a multifunctional puller with an extended function, which comprises a hydraulic jack, a cross beam is sleeved at the telescopic end of the hydraulic jack, first connecting mechanisms are movably arranged at two ends of the cross beam, and the hydraulic jack and the first connecting mechanisms are arranged on the same side of the cross beam; a second connecting mechanism is hinged to the end, away from the cross beam, of the first connecting mechanism, the second connecting mechanism comprises a fourth bolt, the fourth bolt penetrates through the fan, and the bottom of the hydraulic jack makes contact with a fan shaft body; the cross beam, the connecting mechanism and the hydraulic jack are arranged, when the fan installed on the shaft body in an interference mode needs to be detached, the hydraulic jack makes contact with the shaft body, the connecting mechanism makes contact with the fan, then the cross beam is controlled to drive the connecting mechanism and the fan to move through work of the hydraulic jack, and the fan can be controlled to be separated from the shaft body; and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of puller technology, specifically a multifunctional puller with extended functions. Background Technology

[0002] To disassemble two components that are interference-fitted, such as when removing a bearing fitted onto a shaft, a specialized tool, such as a puller, is usually used.

[0003] There are many types of pullers, but their structures are generally similar. For example, a Chinese patent with publication number CN103331721A discloses a puller that includes three pull feet, a pull base, and a lead screw. The lead screw is located at the center of the pull base, and the three pull feet are evenly distributed on the pull base. The bottom of the pull base has three bases with threaded holes at their centers, and the three bases are evenly distributed circumferentially around the threaded holes. Each base has a downwardly protruding positioning guide rail on its bottom surface. The lead screw passes through the threaded holes. Each pull foot includes an upper claw, a middle vertical rod, and a bottom positioning boss. After the connecting pieces are connected by fixing bolts, they form an upper vertical groove, evenly distributed longitudinal positioning grooves, and a lower sliding groove. When using the puller provided by the above patent to disassemble a bearing, the pull feet need to be inserted into the gap between the inner and outer rings of the bearing, and then the lead screw is rotated so that its end presses against the shaft, which can pull the bearing to move on the shaft until the bearing is disengaged.

[0004] While the puller disclosed in the aforementioned patent can achieve interference fit bearings, its practicality is low for other interference fit devices. For example, for fans with interference fit on the shaft, since there is no gap similar to that formed by the inner and outer rings of a bearing, the puller disclosed in the aforementioned patent cannot be fixedly connected to the fan, thus hindering the use of external force to move the fan for disassembly.

[0005] Furthermore, the power to move the aforementioned puller control bearing is provided by rotating the lead screw, which is manually operated. This means that workers need to exert considerable force while holding a wrench to grip the hexagonal head of the lead screw to control its rotation. Moreover, when applying force while gripping the hexagonal head with the wrench, slippage can easily cause deformation of the hexagonal head, making it difficult to apply force with the wrench. Utility Model Content

[0006] The purpose of this invention is to provide a multi-functional puller with extended functions, which aims to improve the problem of inconvenient fan removal in existing pullers.

[0007] This utility model is implemented as follows: a multi-functional puller with extended function includes a hydraulic jack, a crossbeam is sleeved on the telescopic end of the hydraulic jack, and a first connecting mechanism is movably arranged at both ends of the crossbeam. The hydraulic jack and the first connecting mechanism are both arranged on the same side of the crossbeam. A second connecting mechanism is hinged at the end of the first connecting mechanism away from the crossbeam. The second connecting mechanism includes a fourth bolt, which passes through a fan. The bottom of the hydraulic jack contacts the fan shaft.

[0008] Preferably, a threaded groove is provided on the top surface of the telescopic end of the hydraulic jack, and a first bolt is threaded into the threaded groove; a countersunk hole is provided in the middle of the crossbeam, and the bottom diameter of the countersunk hole is larger than the top diameter; the top of the hydraulic jack is inserted into the countersunk hole, and the first bolt is set through the countersunk hole.

[0009] Preferably, a base frame is provided below the hydraulic jack, and a threaded hole is provided at the end corner of the base frame. A second bolt is threaded into the threaded hole and passes through the base plate of the hydraulic jack. A stop cylinder is threaded into the bottom of the base frame.

[0010] Preferably, the first connecting mechanism includes two connecting plates and two middle plates. The two connecting plates are arranged in parallel, and the two middle plates are respectively arranged at both ends of the gap between the two connecting plates. A splicing plate is provided at the end of each middle plate. The middle plates and splicing plates are respectively hinged to the two connecting plates.

[0011] Preferably, the splicing plates are connected by bolts and installed at the ends of the middle plate. On the side walls where the middle plate and the splicing plates are in contact with each other, there are protrusions and grooves respectively, with the protrusions inserted into the grooves. On the side walls where the splicing plates and the middle plate are far apart from each other, there are end shafts, which are connected by bearings and inserted into the connecting plates.

[0012] Preferably, the splicing plate and the middle plate are spliced ​​to form an I-beam structure, and the crossbeam is provided with slots along the length of the crossbeam, with the splicing plate and the middle plate passing through the slots.

[0013] Preferably, the second connecting mechanism includes a bottom ring, a bracket, and a fifth bolt. The bracket has an upward-facing opening, the bottom ring is located on the top of the bracket, and the fifth bolt is threaded through the bracket and also passes through the bottom ring.

[0014] Preferably, a threaded hole is provided at the bottom of the frame, and the end of the fourth bolt is threaded into the threaded hole of the frame.

[0015] Preferably, an internally threaded cylinder is fixedly installed at the top of the bottom ring, and a third bolt is threaded into the internally threaded cylinder; a connecting hole is provided in the middle of the middle plate on the lower side, and the third bolt passes through the connecting hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model is equipped with a crossbeam, a connecting mechanism and a hydraulic jack. When it is necessary to disassemble the fan that is interference-fitted to the shaft, the hydraulic jack contacts the shaft and the connecting mechanism contacts the fan. Then, the crossbeam can be controlled by the hydraulic jack to move the connecting mechanism and the fan, thereby controlling the fan to detach from the shaft and reducing the labor intensity of the workers.

[0018] 2. This utility model is provided with a first connecting mechanism and a second connecting mechanism, and both the first connecting mechanism and the second connecting mechanism can adjust their own state according to the needs. Therefore, the state of the puller can be adjusted according to the actual working needs to adapt to the adjustment of fans of different sizes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the hydraulic jack of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the crossbeam of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first connecting mechanism and the second connecting mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the first connecting mechanism of this utility model;

[0024] Figure 6 This is a structural schematic diagram of the second connecting mechanism of this utility model.

[0025] In the diagram: 1. Hydraulic jack; 11. Threaded groove; 12. First bolt; 13. Second bolt; 14. Threaded hole; 15. Base frame; 16. Support cylinder; 2. Crossbeam; 21. Countersunk hole; 22. Slot hole; 3. First connecting mechanism; 31. Connecting plate; 32. Middle plate; 33. Splicing plate; 34. End shaft; 35. Connecting hole; 4. Second connecting mechanism; 41. Third bolt; 42. Internal threaded cylinder; 43. Bottom ring; 44. Frame; 45. Fourth bolt; 46. Fifth bolt. Detailed implementation method:

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0028] In order to enable the disassembly of the fan that is interference-fitted to the shaft, this embodiment provides a new puller that not only provides a stable connection to the fan but also reduces the workload of the workers.

[0029] like Figure 1 As shown, specifically, the puller includes a hydraulic jack 1, a crossbeam 2, two sets of first connecting mechanisms 3, and two sets of second connecting mechanisms 4. The two sets of second connecting mechanisms 4 are hinged to the ends of the two sets of first connecting mechanisms 3. The ends of the two sets of first connecting mechanisms 3 furthest from the second connecting mechanisms 4 are adjustablely positioned at both ends of the crossbeam 2. The crossbeam 2 is installed at the telescopic end of the hydraulic jack 1, and both the hydraulic jack 1 and the first connecting mechanisms 3 are located on the same side of the crossbeam 2. The hydraulic jack 1 mainly consists of an oil chamber, an oil pump, an oil reservoir, a piston, a crank handle, and an oil valve.

[0030] Therefore, when using this puller to disassemble the fan, the bottom of the hydraulic jack 1 contacts the end of the shaft, and the second connecting mechanism 4 is installed on the fan. Then, the operator repeatedly turns the crank handle to make the manual oil pump continuously pressurize oil into the cylinder. As the oil pressure in the cylinder continuously increases, it forces the piston and the crossbeam 2 on the piston to move upward together, thereby driving the fan to move relative to the shaft and realizing the disassembly of the fan.

[0031] When it is necessary to restore the hydraulic jack 1 to its original shape for future use and easy storage and carrying, the return valve can be opened, and the high-pressure oil in the cylinder will flow back to the oil storage chamber, so the piston can also be reset to the bottom.

[0032] like Figure 2 As shown, in order to avoid the fan movement being affected by the bottom area of ​​the hydraulic jack 1 being larger than the end face area of ​​the shaft, a base frame 15 can be provided below the hydraulic jack 1. A stop cylinder 16 is threaded into the bottom of the base frame 15. Therefore, when the puller is working, the stop cylinder 16 can be made to contact the shaft. Since the outer diameter of the stop cylinder 16 is smaller than the outer diameter of the shaft, sufficient clearance is provided for the fan to detach from the shaft.

[0033] like Figure 2 As shown, in order to make the base frame 15 stably installed at the bottom of the hydraulic jack 1, a second bolt 13 is provided through the end corner of the base plate of the hydraulic jack 1, and a threaded hole 14 is provided at the end corner of the base frame 15. The second bolt 13 is threaded into the threaded hole 14. Therefore, under the action of the second bolt 13, the base frame 15 can be stably installed on the hydraulic jack 1.

[0034] like Figure 2 , Figure 3 As shown, to enable the crossbeam 2 to be detachably and stably installed on the telescopic end of the hydraulic jack 1, a threaded groove 11 is provided on the top surface of the telescopic end of the hydraulic jack 1, and a first bolt 12 is threaded into the threaded groove 11. A countersunk hole 21 is provided in the middle of the crossbeam 2, and the bottom diameter of the countersunk hole 21 is larger than the top diameter. The top of the hydraulic jack 1 is inserted into the countersunk hole 21, and the first bolt 12 is installed through the countersunk hole 21. Therefore, with the cooperation of the countersunk hole 21 and the first bolt 12, the crossbeam 2 can be stably fitted on the telescopic end of the hydraulic jack 1, and it provides convenience for disassembly as needed.

[0035] like Figure 5 As shown, in order to connect the crossbeam 2 and the second connecting mechanism 4, the first connecting mechanism 3 includes two connecting plates 31 and two middle plates 32. The two connecting plates 31 are arranged in parallel, and the two middle plates 32 are respectively arranged at both ends of the gap between the two connecting plates 31. A splicing plate 33 is provided at the end of each middle plate 32. An end shaft 34 is provided on the side wall of the splicing plate 33 and the middle plate 32 that are far apart from each other. The end shaft 34 is inserted into the connecting plate 31 through a bearing connection. Therefore, the middle plate 32 and the connecting plate 31 are hinged together, and the tilt angle of the connecting plate 31 can be adjusted according to the size of the fan, thereby improving the practicality of the puller.

[0036] like Figure 3 , Figure 5 As shown, in order to further improve the flexibility of the puller, a slot 22 is provided on the crossbeam 2. The slot 22 is set along the length direction of the crossbeam 2, and the splicing plate 33 and the middle plate 32 are spliced ​​to form an I-beam structure. Therefore, the splicing plate 33 and the middle plate 32 are set through the slot 22. At the same time, the splicing plate 33 and the middle plate 32 can move along the length direction of the slot 22 to adjust the position of the connecting plate 31, providing support for the puller to adapt to the disassembly of fans of different sizes.

[0037] like Figure 5 As shown, to ensure stable installation of the splicing plate 33 and the middle plate 32 relative to the crossbeam 2, the splicing plate 33 is bolted to the end of the middle plate 32. Therefore, the ends of the splicing plate 33 and the middle plate 32 press against the crossbeam 2, and under the action of friction, the splicing plate 33 and the middle plate 32 are stably installed relative to the crossbeam 2. Furthermore, protrusions and grooves are respectively provided on the side walls where the middle plate 32 and the splicing plate 33 fit together, with the protrusions inserted into the grooves.

[0038] like Figure 6 As shown, when the connecting plate 31 is tilted, in order to stably connect the second connecting mechanism 4 to the fan, the second connecting mechanism 4 includes a bottom ring 43, a bracket 44, a fourth bolt 45, a fifth bolt 46, etc.

[0039] like Figure 6 As shown, an internally threaded cylinder 42 is fixedly installed on the top of the bottom ring 43, and a third bolt 41 is threaded into the internally threaded cylinder 42. A connecting hole 35 is provided in the middle of the middle plate 32 on the lower side, and the third bolt 41 passes through the connecting hole 35. Therefore, the bottom ring 43 is movably installed at the bottom of the first connecting mechanism 3, that is, the bottom ring 43 can rotate around the central axis of the third bolt 41, and the orientation of the bottom ring 43 can be adjusted according to actual needs.

[0040] like Figure 6 As shown, the frame 44 has an upward opening, and the bottom ring 43 is located on the top of the frame 44. The fifth bolt 46 is threaded through the frame 44 and also through the bottom ring 43. With this arrangement, the bottom ring 43 can rotate around the central axis of the fifth bolt 46. Since the fifth bolt 46 and the third bolt 41 are perpendicular to each other, the bottom ring 43 can rotate within a large range in space.

[0041] like Figure 6 As shown, in order to connect the bracket 44 to the fan, a threaded hole is provided at the bottom of the bracket 44. After the fourth bolt 45 passes through the fan, the end of the fourth bolt 45 is threaded into the threaded hole of the bracket 44.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-functional puller with extended functionality, characterized in that, The device includes a hydraulic jack (1), a crossbeam (2) is fitted onto the telescopic end of the hydraulic jack (1), and a first connecting mechanism (3) is movably arranged at both ends of the crossbeam (2). The hydraulic jack (1) and the first connecting mechanism (3) are both located on the same side of the crossbeam (2). A second connecting mechanism (4) is hinged to the end of the first connecting mechanism (3) away from the crossbeam (2). The second connecting mechanism (4) includes a fourth bolt (45), which passes through the fan. The bottom of the hydraulic jack (1) is in contact with the fan shaft.

2. A multi-functional puller with extended functionality according to claim 1, characterized in that, A threaded groove (11) is provided on the top surface of the telescopic end of the hydraulic jack (1), and a first bolt (12) is threaded into the threaded groove (11); a countersunk hole (21) is provided in the middle of the crossbeam (2), and the bottom diameter of the countersunk hole (21) is larger than the top diameter; the top of the hydraulic jack (1) is inserted into the countersunk hole (21), and the first bolt (12) is set through the countersunk hole (21).

3. A multi-functional puller with extended functionality according to claim 2, characterized in that, A base frame (15) is provided below the hydraulic jack (1). A threaded hole (14) is provided at the end corner of the base frame (15). A second bolt (13) is threaded into the threaded hole (14). The second bolt (13) passes through the base plate of the hydraulic jack (1). A stop cylinder (16) is threaded into the bottom of the base frame (15).

4. A multi-functional puller with extended functionality according to claim 2, characterized in that, The first connecting mechanism (3) includes two connecting plates (31) and two middle plates (32). The two connecting plates (31) are arranged in parallel, and the two middle plates (32) are respectively arranged at both ends of the gap between the two connecting plates (31). A splicing plate (33) is provided at the end of each middle plate (32). The middle plate (32) and the splicing plate (33) are respectively hinged to the two connecting plates (31).

5. A multi-functional puller with extended functionality according to claim 4, characterized in that, The splicing plate (33) is bolted to the end of the middle plate (32). On the side walls where the middle plate (32) and the splicing plate (33) are in contact with each other, there are protrusions and grooves respectively. The protrusions are inserted into the grooves. On the side walls where the splicing plate (33) and the middle plate (32) are far apart from each other, there are end shafts (34). The end shafts (34) are inserted into the connecting plate (31) through bearings.

6. A multi-functional puller with extended functionality according to claim 5, characterized in that, The splicing plate (33) and the middle plate (32) are spliced ​​to form an I-beam structure. A slot (22) is provided on the crossbeam (2). The slot (22) is provided along the length direction of the crossbeam (2), and the splicing plate (33) and the middle plate (32) are provided through the slot (22).

7. A multi-functional puller with extended functionality according to claim 4, characterized in that, The second connecting mechanism (4) includes a bottom ring (43), a bracket (44) and a fifth bolt (46). The bracket (44) has an opening facing upwards. The bottom ring (43) is located on the top of the bracket (44). The fifth bolt (46) is threaded through the bracket (44) and also passes through the bottom ring (43).

8. A multi-functional puller with extended functionality according to claim 7, characterized in that, A threaded hole (14) is provided at the bottom of the frame (44), and the end of the fourth bolt (45) is threaded into the threaded hole (14) of the frame (44).

9. A multi-functional puller with extended functionality according to claim 7, characterized in that, An internally threaded cylinder (42) is fixedly installed on the top of the bottom ring (43), and a third bolt (41) is threaded into the internally threaded cylinder (42); a connecting hole (35) is provided in the middle of the middle plate (32) located on the lower side, and the third bolt (41) is provided through the connecting hole (35).

Images