Drawing device

Abstract

The utility model discloses a drawing device, which belongs to the technical field of dismantling of equipment parts, solves the problem of poor dismantling effect of parts due to limited space, and comprises a hydraulic cylinder, a lead screw seat and a connecting seat, a pushing end of the hydraulic cylinder is sleeved and connected with the lead screw seat through threads, and a plurality of bulges are uniformly distributed on the outer wall of the lead screw seat. A first connecting hole is transversely formed in the bulge in a penetrating manner; a plurality of connecting blocks are arranged on the upper surface of the connecting base, second connecting holes are transversely formed in the connecting blocks in a penetrating mode, every two connecting blocks form a group, the number of the connecting blocks is the same as the number of the protrusions, the protrusions are arranged between the two connecting blocks, and the protrusions penetrate through the first connecting holes and the second connecting holes through first connecting bolts to be connected, and a plurality of long holes are formed in the connecting base in a penetrating mode. A second connecting bolt is arranged in the long hole in a penetrating mode. The device is matched with a hydraulic cylinder for repeated use, is simple to manufacture, quick to install and use, light in weight and convenient to carry, reduces the production cost, and saves resources.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment component removal, and in particular relates to a pulling device. Background Art

[0002] Equipment inspection and maintenance often require the removal of components such as couplings, gear couplings, and fan impellers, especially those involving the equipment's shaft-couplings, shaft-gears, shaft-fan impellers, and other components that need to be installed and removed. During the disassembly process, the couplings, gear couplings, fan impellers, etc. are often limited in space from the equipment casing, and cannot be directly removed using existing hydraulic pullers, pullers, jigs, and other tools. For example, the hydraulic puller's claws cannot be installed between the couplings, gears, fan impellers, and the equipment casing. Therefore, special jigs or special removal tools can only be used to remove the couplings and gears in conjunction with a jack.

[0003] During this operation, not only is the production of special jigs labor-intensive, time-consuming and labor-intensive, but when the distance between the coupling, gears and motor end cover is small, the jigs can only be made of thinner steel plates based on the gap. The jigs often fail to achieve the required strength, and when the coupling and gears are removed, the jigs are deformed, resulting in removal failure. It is even more impossible to make a special jig for the fan impeller for removal. Utility Model Content

[0004] The utility model aims to provide a pulling device to solve the problem of poor effect of removing parts due to limited space.

[0005] The technical solution of the utility model is: a pulling device, including a hydraulic cylinder, a screw seat and a connecting seat, the top push end of the hydraulic cylinder is connected to the screw seat sleeve by a thread, the outer wall of the screw seat is evenly distributed with a plurality of protrusions, and a first connecting hole is transversely penetrated on the protrusion; a plurality of connecting blocks are arranged on the upper surface of the connecting seat, and a second connecting hole is transversely penetrated on the connecting block, and every two connecting blocks form a group, and the number of connecting block groups is consistent with the number of protrusions, the protrusion is arranged between the two connecting blocks, and the first connecting hole and the second connecting hole are connected by a first connecting bolt penetrating through the first connecting hole, and a plurality of long holes are penetrated on the connecting seat, and a second connecting bolt is penetrated in the long hole.

[0006] As a further improvement of the utility model, the screw seat is in a circular ring shape, and the connecting seat is in a disc shape.

[0007] As a further improvement of the present utility model, the number of protrusions is four, and the number of connecting blocks is eight.

[0008] The beneficial effects of the utility model are as follows: when using the utility model to dismantle components such as couplings, gear couplings, and fan impellers, the screw seat is connected to the connecting seat, and then the second connecting bolt is connected to the bolt holes on the outer end surfaces of the couplings, gear couplings, and fan impellers. By lifting and pressing the reciprocating hydraulic cylinder top push end, the couplings or gear couplings or fan impellers and other components connected to the utility model are caused to produce relative movement with the shaft of the equipment, thereby achieving the purpose of dismantling components such as couplings, gear couplings, and fan impellers.

[0009] The utility model can be used in conjunction with a hydraulic cylinder to effectively solve the problem that the existing hydraulic pullers, pullers, jigs and other tools cannot be used to directly remove the couplings, gears and impellers from the equipment housing due to limited space between the couplings, gears and impellers. The utility model can effectively solve the problem that a special jig or special removal tool must be made each time and a jack must be used to remove the couplings and gears, thereby effectively reducing the workload of inspection and maintenance operations and shortening the time for removing the couplings, gears and impellers. The utility model can effectively solve the problem that the jig made of thinner steel plates can only meet the gap and cannot reach the required strength, and the jig is deformed when removing the couplings and gears, resulting in removal failure.

[0010] The utility model can be used repeatedly in conjunction with a hydraulic cylinder, and has the advantages of simple manufacture, quick installation and use, light weight, and convenient carrying, thus avoiding repeated purchase of hydraulic cylinders, reducing production costs, and saving resource use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural exploded view of the utility model.

[0013] In the figure: 1-hydraulic cylinder; 2-thread; 3-screw seat; 31-protrusion; 32-first connecting hole; 4-connecting seat; 41-connecting block; 42-second connecting hole; 43-long hole; 5-first connecting bolt; 6-second connecting bolt; 7-gear; 71-bolt hole; 8-shaft; 9-nut. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] like Figure 1-Figure 2As shown, a pulling device includes a hydraulic cylinder 1, a screw seat 3 and a connecting seat 4. The pushing end of the hydraulic cylinder 1 is sleeved and connected to the screw seat 3 through a thread 2. The outer wall of the screw seat 3 is evenly distributed with a plurality of protrusions 31, and a first connecting hole 32 is transversely penetrated on the protrusion 31; a plurality of connecting blocks 41 are provided on the upper surface of the connecting seat 4, and a second connecting hole 42 is transversely penetrated on the connecting block 41. Every two connecting blocks 41 form a group, and the number of connecting blocks 41 groups is consistent with the number of protrusions 31. The protrusion 31 is arranged between the two connecting blocks 41, and is connected by a first connecting bolt 5 penetrating the first connecting hole 32 and the second connecting hole 42. A plurality of long holes 43 are penetrated on the connecting seat 41, and the long hole 43 is arranged between every two groups of connecting blocks 41. A second connecting bolt 6 is penetrated in the long hole 43, and the first connecting bolt 5 and the second connecting bolt 6 are high-strength bolts.

[0016] The screw seat 3 is in the shape of a ring, and the connecting seat 4 is in the shape of a disc. The screw seat 3 and the connecting seat 4 of this shape can be better adapted to components such as couplings, gear joints, and fan impellers, and the circle has no sharp edges, which reduces safety hazards. There are four protrusions 31 and eight connecting blocks 41. The symmetrical and evenly distributed arrangement of the protrusions 31 and the connecting blocks 41 can make the connection more stable and firm, thereby ensuring the effective implementation of the operation.

[0017] The utility model can be directly used in the disassembly operation of components with internal threaded holes on the outer end faces of couplings, gear couplings, and fan impellers. Internal threaded holes that match the long holes 43 and the second connecting bolts 6 can also be set on the outer end faces of components such as couplings, gear couplings, and fan impellers.

[0018] Taking the disassembly of gear 7 as an example, first install the screw seat 3 on the hydraulic cylinder 1 of the on-site hydraulic puller through the thread 2, place the protrusion 31 on the screw seat 3 between a group of connecting blocks 41 on the connecting seat 4, use four first connecting bolts 5 to pass through the first connecting hole 32 and the second connecting hole 42, and cooperate with the nut 9 to connect the screw seat 3 to the connecting seat 4; pass the four second connecting bolts 6 through the four long holes 43 on the connecting seat 4 respectively, screw them into the bolt holes on the outer end surface of the gear 7 and tighten them, rotate the hydraulic cylinder 1 to adjust it until the pushing end of the hydraulic cylinder 1 is at the center position of the shaft 8 end of the equipment, and then push the pushing end of the hydraulic cylinder 1 out of the hydraulic cylinder 1 by lifting and pressing the reciprocating motion of the hydraulic cylinder 1, so that the screw seat 3, the connecting seat 4 and the gear 7 have relative movement with the shaft 8 of the equipment until the gear 7 is pulled out from the shaft 8 to complete the operation.

[0019] When the utility model is used to dismantle components such as couplings, gear couplings, and fan impellers, the following problems can be effectively solved: 1. Due to limited space between components such as couplings, gear couplings, and fan impellers and the equipment casing, they cannot be dismantled using a hydraulic puller; 2. When the space between components such as couplings, gear couplings, and fan impellers and the equipment casing is limited, the special jigs and special dismantling tools produced are complex, bulky, and cannot be reused; 3. When the space between components such as couplings, gear couplings, and fan impellers and the equipment casing is limited, the special jigs produced do not reach the required strength, resulting in failure to dismantle the components; 4. The time and workload required for inspection, maintenance, and dismantling of components such as couplings, gear couplings, and fan impellers is long.

Claims

1. A pulling device, characterized in that: The invention comprises a hydraulic cylinder (1), a screw seat (3) and a connecting seat (4), wherein the pushing end of the hydraulic cylinder (1) is sleeve-connected with the screw seat (3) via a thread (2), the outer wall of the screw seat (3) is evenly distributed with a plurality of protrusions (31), and the protrusions (31) are provided with a first connecting hole (32) extending transversely therethrough; the upper surface of the connecting seat (4) is provided with a plurality of connecting blocks (41), and the connecting blocks (41) are provided with a second connecting hole (42) extending transversely therethrough, and every two connecting blocks (41) form a group, and the number of connecting blocks (41) is the same as the number of protrusions (31); the protrusion (31) is arranged between two connecting blocks (41), and is connected to the first connecting hole (32) and the second connecting hole (42) via a first connecting bolt (5) extending through the first connecting hole (32) and the second connecting hole (42); the connecting seat (4) is provided with a plurality of long holes (43), and the long holes (43) are provided with a second connecting bolt (6) extending through them.

2. A pulling device according to claim 1, characterized in that: The screw seat (3) is in the shape of a circular ring, and the connecting seat (4) is in the shape of a circular disc.

3. A pulling device according to claim 1 or 2, characterized in that: The number of the protrusions (31) is four, and the number of the connecting blocks (41) is eight.

Images