Simple drawbar device

Abstract

The utility model discloses a simple and easy pull horse device relates to mechanical maintenance tool technical field. Including support assembly, pressing plate, fixed connecting piece and knockout bolt, wherein, support assembly and pressing plate are opposite and are set up, and support assembly and pressing plate are connected through fixed connecting piece between, and the containing space for placing work piece is formed between support assembly and pressing plate, and work piece includes the base body part of the excess connection of the dismounting part and the dismounting part, and the threaded hole is seted up on the pressing plate, and the knockout bolt is connected with the pressing plate thread cooperation, and the knockout bolt is along the first direction and passes threaded hole and extends into the containing space, and the end of the knockout bolt for top -clamping in the containing space is used for top -clamping in the dismounting part of work piece, and the base body part of work piece can be tightly toped on the support assembly to the knockout bolt, and the dismounting part is toped out from the base body part, and the first direction is the direction of the knockout bolt's top -in. The utility model discloses convenient adjustment can be efficient and dismounts small and medium size shaft coupling, bearing, gear, axle sleeve etc.

Description

Technical Field

[0001] This utility model relates to the field of mechanical repair tools, specifically a simple puller device. Background Technology

[0002] Pullers are mainly used to disassemble couplings, bearings, gears, bushings, and other equipment in various mechanical devices. Existing traditional pullers typically adopt a three-jaw structure and are hydraulically driven. They are not only large in size and poorly adaptable to narrow spaces, but also complex to operate. In addition, they have strict requirements on the dimensions of the workpieces to be disassembled, requiring prior measurement and processing. This limits their applicability and leads to a waste of manpower and materials. Utility Model Content

[0003] The purpose of this invention is to provide a simple puller device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a simple puller device, comprising a support assembly, a pressure plate, a fixing connector, and an ejector bolt, wherein the support assembly and the pressure plate are arranged opposite to each other and connected by the fixing connector, forming a receiving space for placing a workpiece between the support assembly and the pressure plate, the workpiece comprising a part to be disassembled and a base part that is interference-connected to the part to be disassembled, the pressure plate having a threaded through hole, the ejector bolt being threadedly connected to the pressure plate, and the ejector bolt extending into the receiving space through the threaded through hole in a first direction, one end of the ejector bolt extending into the receiving space being used to abut against the part to be disassembled of the workpiece, and tightening the ejector bolt can press the base part of the workpiece against the support assembly and eject the part to be disassembled from the base part, the first direction being the ejection direction of the ejector bolt.

[0005] Based on the above technical features, the simple puller device of this utility model can be used by placing the support assembly against the base of the workpiece, tightening the push-out bolt against the part of the workpiece to be disassembled, and continuing to tighten until the part of the workpiece to be disassembled is detached from the base. The simple puller device of this utility model is easy to adjust and can efficiently disassemble small and medium-sized couplings, bearings, gears, bushings, etc., and has strong applicability.

[0006] Preferably, the fixing connector is a fixing bolt, and the simple puller device includes at least three fixing bolts; both the support assembly and the pressure plate have through holes, and the fixing bolts pass through the corresponding through holes along the first direction to connect with the support assembly and the pressure plate.

[0007] Based on the above technical features, through holes are provided on the support assembly and the pressure plate, which enables the adjustment of the relative position between the support assembly and the pressure plate. Screwing the nut on the fixing bolt can lock the distance between the support assembly and the pressure plate, so that the device can adapt to workpieces with different height dimensions and specifications.

[0008] In this technical solution, preferably, the simple puller device comprises four fixing bolts, the support assembly comprises two adjusting plates and two fixing plates, the two adjusting plates and the two fixing plates are sequentially connected end to end through the four fixing bolts, wherein the two adjusting plates are arranged along a second direction and both extend along a third direction, the two fixing plates are arranged along the third direction and both extend along the second direction, and the second direction is perpendicular to the first direction and the third direction respectively. Still more preferably, the through hole opened on the adjusting plate is an oblong first waist-shaped hole, the through hole opened on the pressure plate is an oblong second waist-shaped hole, the positions of the first waist-shaped hole and the second waist-shaped hole are spatially aligned, and the length direction of both the first waist-shaped hole and the second waist-shaped hole faces the third direction. Still more preferably, the four first waist-shaped holes opened on the adjusting plate are distributed in a 2*2 array, and the four second waist-shaped holes opened on the pressure plate are also distributed in a 2*2 array.

[0009] Based on the above technical features, adjusting the position of the fixing bolt in the first waist-shaped hole and the second waist-shaped hole enables the puller device to adapt to workpieces with different width dimensions and specifications, and at the same time, facilitates the disassembly and assembly of the workpiece (that is, before loading the workpiece into the accommodating space, the spacing between the two adjusting plates can be appropriately enlarged to facilitate rapid loading and unloading). The fixing plates are used to provide stable base support, can effectively fix the position of the adjusting plates, prevent displacement or shaking during the adjustment process, and ensure the rigidity and accuracy of the puller device when in use.

[0010] In this technical solution, preferably, the pressure plate is in a shape of Chinese character "日", a cross beam is arranged in the middle, the threaded through hole is opened on the cross beam, and the second waist-shaped holes are opened on opposite sides of the cross beam.

[0011] Based on the above technical features, the pressure plate adopts a hollow middle structure design, which reduces the material weight while ensuring strength, lowers the production cost, and correspondingly reduces the overall weight of the puller device, which is convenient for use.

[0012] In this technical solution, preferably, the threaded through hole opened on the pressure plate is located at the centroid of the cross section of the pressure plate.

[0013] Based on the above technical features, the threaded through hole being located at the centroid position of the pressure plate can maintain the stability of the ejector bolt during the jacking process, and avoid stress concentration caused by eccentricity.

[0014] In this technical solution, preferably, both the fixing bolt and the ejector bolt are hexagonal head bolts. More preferably, the length of the fixing bolt is 250mm to 350mm, and the length of the ejector bolt is 170mm to 270mm.

[0015] Based on the above technical features, the hexagonal design can provide multiple wrench operating positions such as 60°, 120°, and 180°, making it easier to position during assembly. Attached Figure Description

[0016] Figure 1 This is a front view of the simple puller device in an embodiment of this utility model;

[0017] Figure 2 As an embodiment of this utility model Figure 1 The left view;

[0018] Figure 3 This is a schematic diagram of the pressure plate in an embodiment of the present invention.

[0019] In the figure: 1. Support assembly; 11. Adjustment plate; 12. Fixing plate; 13. First oblong hole; 2. Pressure plate; 21. Threaded through hole; 22. Second oblong hole; 3. Fixing bolt; 4. Ejection bolt; 5. Workpiece; 51. Part to be disassembled; 52. Base part. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0024] like Figures 1 to 3 As shown, this utility model provides a technical solution: a simple puller device, including a support assembly 1, a pressure plate 2, a fixing connector, and an ejector bolt 4. The support assembly 1 and the pressure plate 2 are arranged opposite to each other and connected by the fixing connector. A receiving space for placing a workpiece 5 is formed between the support assembly 1 and the pressure plate 2. The workpiece 5 includes a part to be disassembled 51 and a base part 52 that is interference-fitted with the part to be disassembled 51. A threaded through hole 21 is provided on the pressure plate 2. The ejector bolt 4 is threadedly connected to the pressure plate 2, and the ejector bolt 4 extends into the receiving space through the threaded through hole 21 in a first direction. One end of the ejector bolt 4 extending into the receiving space is used to abut against the part to be disassembled 51 of the workpiece 5. Tightening the ejector bolt 4 can press the base part 52 of the workpiece 5 against the support assembly 1 and eject the part to be disassembled 51 from the base part 52. The first direction is the ejection direction of the ejector bolt 4.

[0025] In use, the simple puller device of this utility model can be placed against the base 52 of the workpiece 5, and the push-out bolt 4 can be screwed onto the part 51 to be disassembled of the workpiece 5. Tightening continues until the part 51 to be disassembled of the workpiece 5 is detached from the base 52. Compared with the existing three-jaw hydraulic puller device, this simple puller device is easier to adjust and can efficiently disassemble small and medium-sized couplings, bearings, gears, bushings, etc., making it more versatile.

[0026] Furthermore, the fixing connector is a fixing bolt 3, and the simple puller device includes at least three fixing bolts 3. Both the support assembly 1 and the pressure plate 2 have through holes, and the fixing bolts 3 pass through the corresponding through holes along the first direction to connect with the support assembly 1 and the pressure plate 2.

[0027] Specifically, such as Figure 1 and Figure 2As shown, the simple puller device of this utility model includes four fixing bolts 3. The support assembly 1 includes two adjusting plates 11 and two fixing plates 12. The two adjusting plates 11 and the two fixing plates 12 are connected end to end by the four fixing bolts 3. The two adjusting plates 11 are arranged along a second direction and both extend along a third direction. The two fixing plates 12 are arranged along a third direction and both extend along the second direction. The second direction is perpendicular to the first direction and the third direction, respectively. The through hole on the adjusting plate 11 is a first oblong-shaped hole 13, and the through hole on the pressure plate 2 is a second oblong-shaped hole 22. The first oblong-shaped hole 13 and the second oblong-shaped hole 22 are spatially aligned, and the length direction of the first oblong-shaped hole 13 and the second oblong-shaped hole 22 both face the third direction.

[0028] In this invention, through holes are provided on the adjusting plate 11, the fixing plate 12, and the pressure plate 2, allowing adjustment of the relative positions of the adjusting plate 11, the fixing plate 12, and the pressure plate 2. Tightening the nut in the fixing bolt 3 locks the distance between the support assembly 1 and the pressure plate 2, making it suitable for workpieces 5 of different heights and sizes. Simultaneously, by adjusting the position of the fixing bolt 3 within the first oblong hole 13 and the second oblong hole 22, the puller device can be adapted to workpieces 5 of different widths. Furthermore, before loading the workpiece 5 into the receiving space, the distance between the two adjusting plates 11 can be appropriately increased to facilitate quick loading and unloading of the workpiece. The fixing plate 12 provides stable base support, effectively limiting the position of the adjusting plate 11 and preventing displacement or shaking during adjustment, ensuring the rigidity and accuracy of the puller device during use.

[0029] In this embodiment of the utility model, for ease of wrench tightening, the fixing bolt 3 and the ejector bolt 4 are preferably hexagonal head fully threaded bolts. Of course, in other embodiments, square head bolts, countersunk head bolts, round head square neck bolts, etc. can also be used, as long as they meet the normal use of the puller device.

[0030] The length of the fixing bolt 3 is 250mm to 350mm, and the length of the ejector bolt 4 is 170mm to 270mm. For example, in a specific embodiment of the utility model in actual use, the fixing bolt 3 is a hexagonal full-thread bolt of M20*300 (that is, the fixing bolt has a length of 300mm and a diameter of 20mm), the ejector bolt 4 is a hexagonal full-thread bolt of M24*220 (that is, the ejector bolt has a length of 220mm and a diameter of 24mm), and the adjusting plate 11, the fixing plate 12 and the pressure plate 2 are made of steel plates with a thickness of 20mm. Therefore, in this specific embodiment, the puller device can pull a workpiece 5 with a height dimension of 0 to 220mm (i.e., 300-20*3-220), and the ejector bolt 4 can achieve an adjustable length of 0 to 220mm. Of course, in other embodiments, the length of the fixing bolt 3 can be any value within 250mm to 350mm, the length of the ejector bolt 4 can also be any value within 170mm to 270mm, the fixing bolt 3 can also be a hexagonal bolt of other specifications such as M16 and M24, the fixing bolt 3 can also be a hexagonal bolt of other specifications such as M16 and M20, and the adjusting plate 11, the fixing plate 12 and the pressure plate 2 can also be steel plates of other specifications with a thickness of 10mm to 30mm. All the above dimensions of the fixing bolt 3, the ejector bolt 4, the adjusting plate 11, the fixing plate 12 and the pressure plate 2 are acceptable as long as they can meet the normal use of the puller device.

[0031] As Figure 3 shows, the pressure plate 2 is in the shape of a Chinese character "ri", with a cross beam arranged in the middle, a threaded through hole 21 opened on the cross beam, and second waist-shaped holes 22 opened on opposite sides of the cross beam. The hollow structure design adopted in the middle of the pressure plate 2 reduces the material weight while ensuring strength, lowers production cost, and correspondingly reduces the overall weight of the puller device, which is convenient for use. Meanwhile, in order to maintain the stability of the ejector bolt during the jacking process and avoid stress concentration caused by eccentricity, the threaded through hole 21 opened on the pressure plate 2 is located at the section centroid of the pressure plate 2. Of course, in other embodiments, the pressure plate 2 can also be made of a rectangular solid steel plate, etc.

[0032] As Figure 2 and Figure 3 shows, the four first waist-shaped holes 13 opened on the adjusting plate 11 are distributed in a 2*2 array, and the four second waist-shaped holes 22 opened on the pressure plate 2 are also distributed in a 2*2 array. Of course, in other embodiments, the four first waist-shaped holes 13 on the adjusting plate 11 and the four second waist-shaped holes 22 on the pressure plate 2 can also be distributed annularly, that is, the included angle between adjacent first waist-shaped holes 13 is 90°, and the included angle between adjacent second waist-shaped holes 22 is 90°.

[0033] In a specific embodiment of the present invention in actual use, the distance between the two adjustment plates 11 is 500mm, the distance between the midpoints of the lines connecting the centers of the first waist-shaped holes 13 or the second waist-shaped holes 22 arranged in a 2*2 array is 75mm, and along the third direction, the minimum distance between the midpoints of the lines connecting the centers of the two first waist-shaped holes 13 is 50mm and the maximum distance is 200mm, thus achieving an adjustment distance between 50mm and 200mm. Therefore, the puller device in this embodiment can be adapted to workpieces 5 with a width of 50mm to 200mm and workpieces 5 with a maximum outer diameter of 50mm to 500mm.

[0034] The puller device in this utility model has a simple structure and is easy to source materials. In actual use, technicians can first loosen the nut on the fixing bolt 3, place the workpiece 5 into the receiving space, so that the fixing plate 12 abuts against the base part 52 of the workpiece 5, and screw the ejector bolt 4 onto the part 51 of the workpiece 5 to be disassembled. Adjust the position of the fixing bolt 3 in the first oblong hole 13 and the second oblong hole 22 so that the fixing bolt 3 squeezes the workpiece 5 in the horizontal direction. Then, screw the nut on the fixing bolt 3 to lock it. Finally, screw the ejector bolt 4 to press the axis of the workpiece 5 until the part 51 of the workpiece 5 to be disassembled is separated from the base part 52.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple puller device, characterized in that, comprising a support assembly (1), a pressure plate (2), a fixed connecting member and an ejection bolt (4), wherein, said support assembly (1) and said pressure plate (2) are arranged opposite to each other, the support assembly (1) and the pressure plate (2) are connected to each other via the fixed connecting member, an accommodation space for placing a workpiece (5) is formed between the support assembly (1) and the pressure plate (2), and said workpiece (5) comprises a part to be disassembled (51) and a base part (52) which is in interference connection with the part to be disassembled (51); a threaded through hole (21) is opened on said pressure plate (2), said ejection bolt (4) is in threaded fit connection with the pressure plate (2), the ejection bolt (4) passes through the threaded through hole (21) along a first direction and extends into the accommodation space, one end of the ejection bolt (4) extending into said accommodation space is configured to abut against the part to be disassembled (51) of said workpiece (5), screwing the ejection bolt (4) can tightly press the base part (52) of the workpiece (5) against the support assembly (1) and eject the part to be disassembled (51) out of said base part (52), and said first direction is the ejection direction of the ejection bolt (4).

2. The simple puller device according to claim 1, characterized in that, said fixed connecting member is a fixed bolt (3), meanwhile, said simple puller device comprises at least three fixed bolts (3); through holes are respectively opened on said support assembly (1) and said pressure plate (2), and said fixed bolts (3) respectively pass through corresponding through holes along the first direction to connect the support assembly (1) and the pressure plate (2).

3. The simple puller device according to claim 2, characterized in that, said simple puller device comprises four fixed bolts (3), said support assembly (1) comprises two adjusting plates (11) and two fixing plates (12), the two adjusting plates (11) and the two fixing plates (12) are sequentially connected end to end via the four fixed bolts (3), wherein, said two adjusting plates (11) are arranged along a second direction and both extend along a third direction, said two fixing plates (12) are arranged along the third direction and both extend along the second direction, and said second direction is perpendicular to the first direction and the third direction respectively.

4. The simple puller device according to claim 3, characterized in that, the through hole opened on said adjusting plate (11) is a oblong first waist-shaped hole (13), the through hole opened on said pressure plate (2) is a oblong second waist-shaped hole (22), the positions of said first waist-shaped hole (13) and said second waist-shaped hole (22) are spatially aligned, and the length directions of said first waist-shaped hole (13) and said second waist-shaped hole (22) both face the third direction.

5. The simple puller device according to claim 4, characterized in that, said pressure plate (2) is in a Japanese-character shape, a cross beam is arranged in the middle, said threaded through hole (21) is opened on the cross beam, and said second waist-shaped holes (22) are opened on two opposite sides of said cross beam.

6. The simple puller device according to claim 4, characterized in that, the four first waist-shaped holes (13) opened on said adjusting plates (11) are distributed in a 2*2 array, and the four second waist-shaped holes (22) opened on said pressure plate (2) are also distributed in a 2*2 array.

7. The simple puller device according to any one of claims 1 to 6, characterized in that, the threaded through hole (21) opened on said pressure plate (2) is located at the section centroid of the pressure plate (2).

8. The simple puller device according to claim 2, characterized in that, both said fixed bolts (3) and said ejection bolt (4) are hexagon head bolts.

9. The simple puller device according to claim 8, characterized in that, the length of said fixed bolt (3) is 250mm to 350mm, and the length of said ejection bolt (4) is 170mm to 270mm.

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