Multifunctional limited space rapid drawing tool

Abstract

The utility model relates to a multifunctional limited space rapid drawing tool which comprises an arc-shaped drawing disc which is formed by combining two-section type arc structures and is used for drawing sleeve type parts. A threaded hole is formed in the surface of the arc-shaped pull disc; one end of the supporting connecting rod is provided with external threads for being in threaded connection with the threaded hole in the surface of the arc-shaped pull disc, and the other end of the supporting connecting rod is axially provided with a round hole perpendicular to the supporting connecting rod; the middle section of the transverse supporting rod is provided with a threaded hole perpendicular to the axial direction; the two ends of the transverse supporting rod penetrate through the round holes formed in the two supporting connecting rods correspondingly to be installed. And the power assisting part can be connected with a threaded hole formed in the middle section of the transverse supporting rod and can provide power for drawing the sleeve parts for the supporting connecting rod. According to the tool, sleeve parts can be conveniently pulled in spaces with different depths, the sleeve parts can be conveniently pulled in narrow spaces or deep positions through the assistance parts with different structures, and the tool is flexible, variable, efficient and wide in use scene.

Description

Technical Field

[0001] The utility model relates to the field of shaft sleeve disassembly, in particular to a multifunctional limited space fast pulling tool. Background Art

[0002] At present, the commonly used pullers for disassembling sleeve parts on the market are two-claw, three-claw and bearing-specific pullers. Common pullers are mostly used in places with large space, sufficient depth, and a large distance from the shaft shoulder end face. When using a conventional puller, the bearing or sleeve part must be moved outward for a certain distance before the hook claw can be placed behind the sleeve part to be pulled. The middle screw is screwed in to hold the shaft and hook the two sides of the part to be pulled out from the shaft. However, when pulling and disassembling sleeve parts in a narrow space, on the one hand, the space is small and the position is compact, and the commonly used pullers are large in appearance and short in claw length. When pulling sleeve parts with a deeper depth, the puller cannot be used due to the space where the parts are located, the size of the puller itself, and the length of the claws. On the other hand, because the puller claws have a certain thickness, the parts need to be pulled out a certain distance before the claws can be put in. However, the sleeve parts that generally need to be pulled out by the puller have a tight fit with the shaft and are close to the shoulder end face. If the parts are rusted, it is very difficult to disassemble. When other tools are used to push or pry the parts outward, it is easy to cause damage to the parts. The whole process is time-consuming and labor-intensive, and no suitable tools can be used.

[0003] Therefore, in order to effectively solve the problem of convenient pulling of sleeve parts in narrow spaces, it is urgent to design a tool that is convenient for pulling out sleeve parts that are tightly assembled in narrow spaces and close to the end face of the shaft shoulder. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a multifunctional limited space sleeve parts quick pulling tool, which is simple to assemble, easy to use, and highly efficient. On the one hand, through flexible assembly, it can be conveniently used for pulling and disassembling sleeve parts of different depths and sizes in narrow spaces; on the other hand, through the thinner pulling plate design, while ensuring strength, it is more convenient to pull sleeve parts close to the end face of the shaft shoulder, reduce the labor intensity of disassembly, reduce the difficulty of maintenance, improve maintenance efficiency, and effectively protect parts from damage caused by improper use of tools during disassembly. Specifically, the purpose of the utility model is achieved as follows:

[0005] A multifunctional limited space quick pulling tool, comprising:

[0006] The arc-shaped pull plate is a two-petal arc structure used in combination for pulling sleeve parts; a threaded hole is provided on the surface of the arc-shaped pull plate;

[0007] A supporting connecting rod, one end of which is provided with an external thread for threaded connection with the threaded hole on the surface of the arc-shaped pull plate, and the other end of which is provided with a circular hole perpendicular to the axial direction of the supporting connecting rod;

[0008] The transverse support rod has a threaded hole in the middle perpendicular to the axial direction; the two ends of the transverse support rod are respectively passed through the circular holes on the two support connecting rods for installation;

[0009] The power-assisting part can be connected to the threaded hole provided in the middle section of the transverse support rod, and can provide the support connecting rod with power for pulling sleeve-like parts.

[0010] Furthermore, an internal threaded hole is provided on the support connecting rod relative to the other end with an external thread, and the diameter of the end with the external thread is the same as the diameter of the internal thread of the end with the internal threaded hole. When the length of the support connecting rod needs to be lengthened, multiple support connecting rods can be used in combination.

[0011] Furthermore, the assisting part is a threaded push rod, and the threaded push rod is provided with an external thread, which can pass through the threaded hole opened in the middle section of the transverse support rod; the inner end of the threaded push rod is a frustum structure, and the outer end is an external hexagonal head; rotating the threaded push rod can support the axis of the sleeve-like parts to be pulled out, and the sleeve-like parts can be pulled out from the shaft by generating an opposite force through the arc-shaped pulling disk and the threaded push rod.

[0012] Furthermore, the power-assisting part includes a hand rod and a gravity block. The hand rod is "T"-shaped, and the longer end is provided with an external thread, which can be connected to the threaded hole opened in the middle section of the transverse support rod; the gravity block is provided with a through hole, and the long end of the hand rod passes through the gravity block and is connected to the transverse support rod.

[0013] Furthermore, the gravity block is cylindrical, a through hole is opened along the axial direction of the cylinder, and the outer cylindrical surface of the gravity block is knurled.

[0014] Furthermore, the arc-shaped pull plate is of stepped design, and a thickened step is provided at a position connected to the supporting connecting rod relative to an inner area.

[0015] Furthermore, the inner arc edge of the arc-shaped pull plate is provided with an inclined surface, so as to facilitate insertion into a narrow gap for use.

[0016] Furthermore, after the transverse support rod passes through the support connecting rod, fixing nuts are provided on both sides of the support connecting rod for fixing the position of the support connecting rod on the transverse support rod.

[0017] When in use, the two supporting connecting rods 2 are threadedly connected to the threaded holes of the two arc-shaped pull plates 1 and fixed, and then the transverse supporting rod is passed through the circular hole of the supporting connecting rod 2, so that the threaded hole opened in the middle section of the transverse supporting rod is located in the middle position. The two arc-shaped pull plates 1 are placed behind the sleeve parts, and the position is fixed by fixing nuts after the main sleeve parts are clamped. For the sleeve parts that can be disassembled and supported by the axis, the threaded push rod 4 is used to pass through the threaded hole opened in the middle of the transverse supporting rod, and one end of the cone supports the axis. The outer hexagonal head of the threaded push rod 4 is turned with a fixed wrench to pull the sleeve parts relative to the axis. For the sleeve parts that are not disassembled and supported by the axis, the gravity block 5 is passed through the long rod of the hand pull rod 6, and then the long rod of the hand pull rod 6 is connected to the threaded hole opened in the middle section of the transverse supporting rod. After that, the gravity block 5 is pushed outward to make the gravity block 5 slide on the hand pull rod 6, and the short rod of the hand pull rod 6 is hit by inertia, and the sleeve parts are pulled out by inertia.

[0018] The beneficial effects of the utility model are as follows:

[0019] (i) The supporting connecting rods of the utility model can be combined to form different lengths, which is convenient for pulling out sleeve parts in spaces of different depths. At the same time, through the switching combination of the threaded push rod and the hand pull rod, sleeve parts can be easily pulled out in a small space or a deep position. It is flexible, efficient, and has a wide range of application scenarios.

[0020] (II) The arc-shaped pull plate of the utility model is designed with two steps of high and low, and the outer side is thickened to effectively prevent the pull plate from being damaged and deformed due to the large force during pulling. The thickness of the inner arc area is relatively thin, and a slope is set on the edge of the inner arc to make the edge thickness smaller, ensuring that it can be effectively put into a narrow gap for use; when pulling small sleeve parts, the thin arc area of ​​the pull plate can be stuck behind the sleeve parts, the contact area is large, and the force is more uniform during pulling; if pulling a slightly larger sleeve part, the sleeve part can be pushed to the thickened position of the arc-shaped pull plate, and the two corners of the thin pull plate are used as support for pulling. It is easy to use and has less restrictions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the use preparation stage of the first embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the use state of the first embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the second embodiment of the utility model;

[0025] Figure 5This is a schematic diagram of the preparation stage for use of the second embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the use status of the second embodiment of the utility model.

[0027] In the figure:

[0028] 1—arc-shaped pull plate, 2—support connecting rod, 3—lateral connecting rod, 4—threaded top rod, 5—gravity block, 6—hand pull rod. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features and objectives achieved by the present invention easy to understand, the technical solution of the present invention is further explained below in combination with one embodiment and a specific implementation method of a multifunctional limited space quick pulling tool provided by the present invention.

[0030] like Figure 1-6 As shown, the specific embodiments given for the utility model are as follows:

[0031] Embodiment 1, as Figure 1-3 shown.

[0032] A multifunctional limited space sleeve-type parts quick pulling tool mainly comprises an arc-shaped pulling plate 1, a supporting connecting rod 2, a transverse connecting rod 3, and a threaded push rod 4. The arc-shaped pulling plate 1 is used in combination with a two-petal structure, which is threadedly connected with the supporting connecting rod 2 respectively. The transverse supporting rod is placed horizontally by passing through the round holes on the two supporting connecting rods 2. The threaded push rod 4 is threadedly matched with the threaded hole on the transverse connecting rod 3 and is used in combination when pulling out the sleeve-type parts.

[0033] The arc-shaped pulling plate 11 is designed with two steps of high and low. The outer area of ​​the threaded connection position with the supporting connecting rod 2 is thickened with a thickness of 10mm to increase the strength of the pulling plate, effectively preventing the pulling plate from being damaged and deformed due to the large force during pulling; in addition, in order to facilitate the use of the pulling plate when the sleeve part is close to the shoulder end face, the thickness of the inner arc area is relatively thin, which is 2mm. At the same time, a slope is set on the edge of the inner arc to make the edge thickness smaller, ensuring that it can be effectively put into a narrow gap for use; the pulling plate is designed in an arc shape. When pulling a small sleeve part, the thin arc area of ​​the pulling plate can be stuck behind the sleeve part, with a large contact area, more uniform force during pulling, and better protection for the parts; if a slightly larger sleeve part is pulled, the sleeve part can be pushed to the thickened position of the arc-shaped pulling plate 11, and the two corner areas of the thin pulling plate are used for support for pulling.

[0034] One end of the supporting connecting rod 2 is an M10 external thread structure connected to the arc-shaped pulling plate 1, and the other end is an M10 threaded hole structure. The supporting connecting rods 2 are combined to form different lengths, which is convenient for pulling sleeve parts in spaces of different depths. At the same time, a φ9mm through hole is designed 5mm below the threaded hole, and the transverse connecting rod 3 is inserted into the through holes of the two supporting connecting rods 2 for combined pulling.

[0035] The middle of the transverse connecting rod 3 is a long nut of M10 with a length of 20mm, and the two ends are fixed by welding with a solid round rod of length φ8. The size of the solid round rod of the transverse connecting rod 3 is slightly smaller than the size of the through hole of the supporting connecting rod 2, which is convenient for the transverse connecting rod 3 to pass through the middle of the supporting connecting rod 2. In addition, a φ12 round table is designed at one end of the transverse connecting rod 3 for position limiting. The threaded push rod 4 is used in conjunction with the long nut thread. By rotating the threaded push rod 4, the rotational force is converted into an axial outward pulling force. In addition, in addition to being used in conjunction with the threaded push rod 4, the long nut in the middle of the transverse connecting rod 3 can also be used in conjunction with the hand pull rod 6, which is convenient for use when the push rod size is not suitable. The top of the threaded push rod 44 is an M12 external hexagonal head, which is convenient for the use of a wrench. At the same time, there is an M6 through hole on the external hexagon. When greater force is needed, a slightly smaller φ6 rod can be placed in the through hole and rotated for use.

[0036] Embodiment 2, as Figure 3-6 shown.

[0037] The hand pull rod 6 has a long rod diameter of φ10 and an M10 external thread at the bottom, which is used in conjunction with the long nut thread of the transverse connecting rod 3. It is a T-shaped design for easy picking. The outer cylindrical surface of the gravity block 5 is knurled to increase the friction area and facilitate picking. In addition, there is a φ14 round hole in the middle of the gravity block 5, which facilitates the movement of the gravity block 5 on the hand pull rod 6 and uses the inertial force to pull out the sleeve parts.

[0038] The working process of this utility model:

[0039] When using the new quick pulling tool, first check the size of the sleeve-like parts to be pulled and the size of the entrance space. When the entrance space size can accommodate the transverse connecting rod 3 and there is a suitable position on the end face of the intermediate shaft that can be used as a support point for the threaded push rod 4, the threaded push rod 4 can be used in conjunction with the thread of the transverse connecting rod 3. First, thread the two supporting connecting rods 2 into the screw holes of the two arc-shaped pulling discs 1 and fix them. Then insert the transverse connecting rod 3 into the through hole of the supporting connecting rod 2 so that the long nut is in the middle position. Then screw the threaded push rod 4 into the long nut. After the assembly is completed, place the two arc-shaped pulling discs 1 behind the sleeve parts respectively. If the sleeve parts and the sleeve parts to be pulled are smaller at this time, you can use a rod or other tools to gently tap the outside of the arc-shaped pulling disc 1 to allow the bevel of the inner edge to fit into the gap between the sleeve parts and the shoulder section. Use a wrench to screw in the outer hexagon of the threaded push rod 4 to convert the force of the thread rotation into the force to pull out the sleeve parts. After the gap is enlarged, loosen the threaded push rod 4 and readjust the arc-shaped chuck to make the chuck contact a larger area of ​​the sleeve parts to effectively protect the sleeve parts and the arc-shaped pulling disc 1. After it is clamped, tighten the threaded push rod 4 again and rotate until the parts are pulled out. If the outer space is narrow and it is inconvenient to use a wrench, a cylindrical rod can be inserted into the hexagonal through hole at the top of the threaded push rod 4 to rotate the threaded push rod 4 as a force rod.

[0040] If there is no shaft in the middle for the threaded push rod 4 to push during pulling, the hand pull rod 6 combination can be used. By measuring the position of the parts, the support connecting rod 2 is threaded and combined to form a suitable support length, and then the two arc-shaped pull plates 1 are placed on both sides of the sleeve parts and clamped. Then, the gravity block 5 is used to force outward, slide on the hand pull rod 6, and use the inertia force to bring the sleeve parts out. By observing the position of different pulling sleeve parts, the pulling tool can be freely combined, and at the same time, whether the position of the middle shaft head can support and tighten can be checked to choose whether to use the threaded push rod 4 or the hand pull rod 6 combination.

[0041] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A multifunctional limited space quick pulling tool, characterized in that: include: The arc-shaped pulling plate (1) is a two-petal arc structure used in combination for pulling sleeve-type parts; a threaded hole is provided on the surface of the arc-shaped pulling plate (1); A supporting connecting rod (2), one end of which is provided with an external thread for threaded connection with a threaded hole on the surface of the arc-shaped pull plate (1), and the other end of which is provided with a circular hole perpendicular to the axial direction of the supporting connecting rod (2); A transverse support rod, the middle section of which is provided with a threaded hole perpendicular to the axial direction; the two ends of the transverse support rod are respectively passed through the circular holes provided on the two support connecting rods (2) for installation; The power-assisting part can be connected to the threaded hole provided in the middle section of the transverse support rod, and can provide the support connecting rod (2) with power for pulling out sleeve-like parts.

2. A multifunctional limited space quick pulling tool as claimed in claim 1, characterized in that: The supporting connecting rod (2) has an internal threaded hole at the end opposite to the end with the external thread, and the diameter of the end with the external thread is the same as the diameter of the internal thread at the end with the internal threaded hole. When the length of the supporting connecting rod (2) needs to be lengthened, multiple supporting connecting rods (2) can be used in combination.

3. A multifunctional limited space quick pulling tool as claimed in claim 1, characterized in that: The assisting part is a threaded push rod (4), and the threaded push rod (4) is provided with an external thread and can pass through a threaded hole opened in the middle section of the transverse support rod; the inner end of the threaded push rod (4) is a frustum structure, and the outer end is an external hexagonal head; the threaded push rod (4) can be rotated to support the axis of the sleeve-like part to be pulled out, and the sleeve-like part can be pulled out from the shaft by generating an opposing force through the arc-shaped pulling plate (1) and the threaded push rod (4).

4. The multifunctional limited space quick pulling tool according to claim 1, characterized in that: The power-assisting part comprises a hand-pull rod (6) and a gravity block (5); the hand-pull rod (6) is T-shaped, and the longer end thereof is provided with an external thread, which can be connected to a threaded hole provided in the middle section of the transverse support rod; the gravity block (5) is provided with a through hole, and the long end of the hand-pull rod (6) passes through the gravity block (5) and is connected to the transverse support rod.

5. A multifunctional limited space quick pulling tool as claimed in claim 4, characterized in that: The gravity block (5) is cylindrical, with a through hole opened along the axial direction of the cylinder, and the outer cylindrical surface of the gravity block (5) is knurled.

6. The multifunctional limited space quick pulling tool according to claim 1, characterized in that: The arc-shaped pull plate (1) is of stepped design, and a thickened step is provided at the position connected to the supporting connecting rod (2) relative to the inner area.

7. The multifunctional limited space quick pulling tool according to claim 1, characterized in that: The inner arc edge of the arc-shaped pull plate (1) is provided with an inclined surface, so as to facilitate insertion into a narrow gap for use.

8. The multifunctional limited space quick pulling tool according to claim 1, characterized in that: After the transverse support rod passes through the support connecting rod (2), fixing nuts are provided on both sides of the support connecting rod (2) for fixing the position of the support connecting rod (2) on the transverse support rod.

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