CN216731641U - Diaphragm pump crankshaft bearing extracting tool - Google Patents

Abstract

The utility model belongs to the technical field of the diaphragm pump bent axle overhauls, concretely relates to diaphragm pump crankshaft bearing extracting tool, including connecting plate, ejector pin and screw rod, the spaced apart connecting hole and an effort hole of being equipped with on the connecting plate, the screw rod passes the connecting hole, the connecting hole is used for passing through the screw rod is fixed the connecting plate extremely on the bearing endotheca, the downthehole internal thread that is equipped with of effort, the ejector pin passes the effort hole and with effort hole threaded connection, just the end top of ejector pin extremely the bearing inner race. The utility model discloses compact structure is light and handy, simple manufacture, and convenient operation has solved the bearing on the crank of bent axle effectively, and the space is narrow, and difficult dismantlement's problem, greatly reduced intensity of labour has improved production efficiency.

Description

Diaphragm pump crankshaft bearing extracting tool

Technical Field

The utility model relates to a diaphragm pump bent axle overhauls technical field, in particular to diaphragm pump bent axle bearing extracting tool.

Background

In the mining and metallurgical industries, the raw materials, semi-finished products and finished products are mostly liquids, and the raw materials are made into semi-finished products and finished products through complicated processes in which fluid pumps serve to transport liquids and provide pressure flow for chemical reactions. The diaphragm pump separates the parts of the pump such as the piston and the cylinder sleeve from the conveyed slurry by arranging the rubber diaphragm, so that the diaphragm pump works in clean oil, the service lives of the parts are ensured, the operation and maintenance cost is greatly reduced, and the diaphragm pump is widely used in the mining industry and the metallurgical industry. The power end of the diaphragm pump adopts a crank connecting rod structure. The crankshaft and the connecting rod output power through the bearing. The crankshaft bearing needs to be replaced after a certain service life, and the large crankshaft bearing comprises a bearing outer ring, bearing balls, a bearing inner ring and a bearing inner sleeve. The bearing inner sleeve is an embedded sleeve which is tightly matched with the crankshaft and is divided into two half-ring sleeves, and the bearing inner sleeve can be installed and detached from the axial direction of the crankshaft. When the bearing is disassembled, the bearing inner sleeve needs to be disassembled firstly, so that the disassembly of the bearing inner sleeve is an important link for disassembling the crankshaft bearing. The bearing is arranged on the crank of the crankshaft, the space is narrow, the bearing and the connecting rod are heavy, and the bearing is not easy to disassemble. Therefore, the difficulty of disassembling the crankshaft bearing is that the space is narrow, and the action surface for disassembling the bearing inner sleeve is small; after the bearing inner ring is heated, the bearing inner sleeve needs to be taken out quickly. Therefore, in order to solve the problem of disassembling the crankshaft bearing of the diaphragm pump, a light crankshaft bearing disassembling tool is urgently needed to solve the problem.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, according to crankshaft bearing's structural feature and bearing disassembly method requirement, design a diaphragm pump crankshaft bearing extracting tool, this extracting tool compact structure is light and handy, simple manufacture, convenient operation has solved the bearing effectively on the crank of bent axle, and the space is narrow, difficult problem of dismantling, greatly reduced intensity of labour, improved production efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a diaphragm pump crankshaft bearing extracting tool, crankshaft bearing includes bearing inner race, bearing ball, bearing inner race and bearing endotheca, extracting tool includes connecting plate, ejector pin and screw rod, the spaced apart connecting hole and an effort hole of being equipped with on the connecting plate, the screw rod passes the connecting hole, the connecting hole is used for passing through the screw rod is fixed the connecting plate extremely on the bearing endotheca, the downthehole internal thread that is equipped with of effort, the ejector pin passes the effort hole and with effort hole threaded connection, just the end top of ejector pin extremely the bearing inner race.

As a further improvement, the connecting hole extremely the distance that the connecting plate is close to bent axle one side is less than the distance of bearing inner race screw hole to bent axle surface, the diameter of connecting hole is greater than the diameter of screw rod.

As a further improvement of the present invention, the screw rod is connected to the threaded hole of the bearing inner sleeve.

As a further improvement of the utility model, the distance between the connecting hole and the acting force hole and the center distance between the bearing inner sleeve and the bearing inner ring are equal.

As a further improvement of the utility model, the ejector pin acts on the one end terminal surface of bearing inner race is the sphere, the intensity of ejector pin is 8.8 grades, the length of ejector pin is 170 mm.

As a further improvement of the present invention, the length of the top bar is equal to the width of the bearing inner sleeve.

As a further improvement of the utility model, the length of the connecting plate is greater than the sum of the thicknesses of the bearing inner ring and the bearing inner sleeve.

As a further improvement of the utility model, the connecting plate is a steel plate, the thickness of the connecting plate is 20mm, the length is 100mm, and the width is 80mm

As a further improvement, the utility model discloses a according to the quantity of bearing inner race screw hole uses the novel instrument of this use of the same quantity during the operation.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

1. the utility model has compact and light structure, simple manufacture and convenient operation, and effectively solves the problems of narrow space when the crankshaft bearing is disassembled and small action surface for disassembling the bearing inner sleeve and difficult disassembly through the design of the connecting plate and the ejector rod; after the inner ring is heated, the inner sleeve of the bearing needs to be taken out quickly. Meanwhile, the mode that the connecting plate is fixed to the bearing inner sleeve by the screw is adopted, so that the bearing inner sleeve and the crankshaft are effectively protected.

2. Through adopting the utility model discloses, can guarantee to dismantle the accurate and easy installation operation of bearing endotheca effect point, can be used for the bearing of different models to dismantle again, have the popularization nature, similar equipment is all applicable reference.

Drawings

Fig. 1 is a schematic structural view of a diaphragm pump crankshaft bearing dismounting tool of the present invention;

FIG. 2 is a schematic structural view of the connecting plate of the present invention;

FIG. 3 is a schematic structural view of the diaphragm pump crankshaft bearing disassembling tool of the present invention in use;

wherein, labeled in the figures: 1-connecting plate; 2-a screw; 3-a top rod; 4-connecting holes; 5-force hole; 6-bearing inner sleeve; 7-bearing inner race; 8-a crankshaft; 9-bearing balls; 10-bearing outer race; 11-a connecting rod.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The term "acting" refers to applying a force to an object or a force applied to an object. The term "thread pair" refers to a mechanical coupling by screwing of threads, a mechanical combination of coupling and transmission. The term "free state" refers to a state where the object is under no external pressure, and in the description of the present invention, the gravity of the connecting rod is offset by lifting the crankshaft connecting rod, so that the bearing is under a state without any other external force. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, a disassembling tool for a crankshaft bearing of a diaphragm pump, the crankshaft bearing includes a bearing outer ring 7, a bearing ball 9, a bearing inner ring 7 and a bearing inner sleeve 6, the disassembling tool includes a connecting plate, a push rod and a screw, as shown in fig. 1, the connecting plate 1 is a basic component of the disassembling tool, and plays a role in transferring force and positioning;

the connection plate 1 has the following basic dimensions: the length is larger than the sum of the thicknesses of the bearing inner ring 7 and the bearing inner sleeve 6, the connecting plate 1 is considered to bear the dismounting force, the connecting plate is made of a steel plate with the thickness of 20mm, the length is 100mm, and the width is 80 mm. Two through holes are formed in the connecting plate 1, as shown in fig. 2, one through hole is a connecting hole 4, the other through hole is an acting force hole 5, the acting force hole 5 is provided with internal threads, the center distance between the two through holes is the center distance between the bearing inner ring 7 and the bearing inner sleeve 6, and the center distance is 50 mm.

The screw rod 2 penetrates through the connecting hole 4, the connecting hole 4 is used for fixing the connecting plate 1 to the bearing inner sleeve 6 through the screw rod 2, the screw rod 2 is matched with a threaded hole in the axial position of the bearing inner sleeve 6, and the diameter of the connecting hole 4 is larger than the diameter of a thread of the screw rod 2; therefore, the screw 2 is selected from M24 (namely the diameter is 24mm), the length is 50mm, the strength is 4.8 grade, and the diameter of the connecting hole 4 is 26 mm. The distance from the connecting hole 4 to one side of the connecting plate 1 close to the crankshaft 8 is smaller than the distance from the threaded hole of the bearing inner sleeve 6 to the outer surface of the crankshaft 8, and therefore the distance is 25 mm. When the connecting plate 1 is installed, the connecting plate 1 can be ensured not to touch the crankshaft 8, and the bearing inner sleeve 6 can not scratch the crankshaft 8 when being ejected out, so that the crankshaft 8 is well protected.

The ejector rod 3 and the acting force hole 5 form a thread pair, and the thread pair is a main structure for disassembling the acting force of the bearing inner sleeve, namely, the ejector rod 3 penetrates through the acting force hole 5 and is in threaded connection with the acting force hole 5, and the tail end of the ejector rod 3 is abutted to the bearing inner ring 7.

In addition, the length of the ejector rod 3 is the width of the bearing inner sleeve 6, so that when the ejector rod 3 is pushed to the bottom, the upper half part of the bearing inner sleeve 6 can be pushed out at one time. Considering the bearing dismounting force, M24 is selected as the ejector rod 3, the length is 170mm, the strength is 8.8 grade, and the thread of the acting force hole 5 is M24. And the end face of one end of the ejector rod 3 acting on the bearing inner ring 7 is a spherical surface so as to prevent the ejector rod 3 from damaging the bearing inner ring 7.

The main steps for disassembling the crankshaft bearing of the diaphragm pump are as follows: the crank of the crankshaft 8 is rotated to the highest point, and the connecting rod 11 is hoisted, so that the crankshaft bearing is in a free state. Use four sets the utility model discloses, will respectively with screw rod 2 the utility model discloses fix four screw hole positions at the first half circle of bearing endotheca 6, as shown in fig. 3. Heating the bearing inner ring 7 to a disassembly temperature (70-90 degrees), simultaneously screwing four sets of the ejector rods 3, wherein the four ejector rods 3 simultaneously act on the bearing inner ring 7 and eject the upper half part of the bearing inner ring 6; rotating the lower half part of the bearing inner sleeve 6 to the upper surface of the crankshaft 8 by adjusting the position of the connecting rod 11, and taking out the lower half part of the bearing inner sleeve 6; by rotating the crank of the crankshaft 8, the connecting rod 11 and the entire bearing (including the bearing inner ring 7, the bearing balls 9, and the bearing outer ring 10) are horizontally lifted out.

The utility model relates to a diaphragm pump crankshaft bearing extracting tool's theory of operation: as shown in fig. 3, 4 sets of the present invention are uniformly distributed and fixed on the upper half part of the bearing inner sleeve 6 through the screw rod 2. Meanwhile, the ejector rod 3 is screwed down, and acting force drives the upper half part of the bearing inner sleeve 6 through the connecting plate 1 and the screw rod 2 to eject the upper half part of the bearing inner sleeve 6. At this time, a gap is formed at the matching position of the bearing and the crankshaft 8, and the bearing can be easily detached from the crankshaft 8.

By the design of the connecting plate 1 and the ejector rod 3, the problem that the space is narrow when the crankshaft bearing is disassembled is effectively solved, and the action surface for disassembling the bearing inner sleeve 6 is small and is not easy to disassemble; after the bearing inner ring 7 is heated, the bearing inner sleeve 6 needs to be taken out quickly. Meanwhile, the mode that the screw 2 is used for fixing the connecting plate 1 to the bearing inner sleeve 6 is adopted, so that the bearing inner sleeve 6 and the crankshaft 8 are effectively protected. Therefore, the utility model discloses a withdrawal tool has solved the bearing effectively on bent axle 8's crank, and the space is narrow, and difficult dismantlement's problem, greatly reduced intensity of labour, improved production efficiency. And the dismounting tool has compact and light structure, simple manufacture and convenient operation.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims (8)

1. The utility model provides a diaphragm pump crankshaft bearing extracting tool, crankshaft bearing includes bearing inner race, bearing ball, bearing inner race and bearing endotheca, its characterized in that: the disassembling tool comprises a connecting plate, an ejector rod and a screw rod, a connecting hole and an acting force hole are formed in the connecting plate at intervals, the screw rod penetrates through the connecting hole, the connecting hole is used for fixing the connecting plate to the bearing inner sleeve through the screw rod, an internal thread is arranged in the acting force hole, the ejector rod penetrates through the acting force hole and is in threaded connection with the acting force hole, and the tail end of the ejector rod props up the bearing inner ring.

2. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the distance from the connecting hole to one side, close to the crankshaft, of the connecting plate is smaller than the distance from a threaded hole of the bearing inner sleeve to the outer surface of the crankshaft, and the diameter of the connecting hole is larger than that of the screw rod.

3. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the screw rod is in threaded connection with the threaded hole in the bearing inner sleeve.

4. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the distance between the connecting hole and the acting force hole is equal to the center distance between the bearing inner sleeve and the bearing inner ring.

5. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the end face of one end, acting on the bearing inner ring, of the ejector rod is a spherical surface, the strength of the ejector rod is 8.8 levels, and the length of the ejector rod is 170 mm.

6. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the length of the top rod is equal to the width of the bearing inner sleeve.

7. A diaphragm pump crankshaft bearing removal tool according to claim 1, wherein: the length of the connecting plate is larger than the sum of the thicknesses of the bearing inner ring and the bearing inner sleeve.

8. A diaphragm pump crankshaft bearing removal tool according to claim 5, wherein: the connecting plate is a steel plate, the thickness of the connecting plate is 20mm, the length of the connecting plate is 100mm, and the width of the connecting plate is 80 mm.

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