CN111546268A

CN111546268A - Special device for maintenance and installation of heavy engine crankshaft oil seal

Info

Publication number: CN111546268A
Application number: CN202010535603.7A
Authority: CN
Inventors: 杨勇; 孔姬飞; 于士峰
Original assignee: Anhui Maanshan Iron and Steel Mining Resources Group Co Ltd; Anhui Masteel Mining Resources Group Nanshan Mining Co Ltd
Current assignee: Anhui Maanshan Iron and Steel Mining Resources Group Co Ltd; Anhui Masteel Mining Resources Group Nanshan Mining Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-08-18

Abstract

The invention discloses a special device for maintenance and installation of a heavy engine crankshaft oil seal, which comprises an engine shell, a crankshaft, an oil seal positioning pushing sleeve, a turbine, a rear cover and a bolt, wherein the engine shell is provided with a bearing; the front end of the oil seal positioning pushing sleeve is matched with the oil seal and pushes against the oil seal, and a sleeve positioning hole through which a bolt penetrates is formed in the bottom of the rear end of the oil seal positioning pushing sleeve; the turbine is matched with the oil seal positioning pushing sleeve through a threaded structure; the rear cover is provided with a worm, the worm is in transmission connection with the turbine, and the bottom of the rear end of the rear cover is provided with a rear cover positioning hole through which a bolt penetrates; the bolt sequentially penetrates through the rear cover, the turbine, the oil seal positioning pushing sleeve and the oil seal and is fixed on a shaft neck of the crankshaft. The device is small and portable, easy to carry, simple and convenient to operate and high in efficiency, can be used in the process of engine overhaul, can also be used in the emergency of the vehicle in the maintenance site, has fewer detached accessories in the process of vehicle maintenance, and can effectively improve the maintenance speed.

Description

Special device for maintenance and installation of heavy engine crankshaft oil seal

Technical Field

The invention relates to the technical field of appliances for mounting engine equipment, in particular to a special device for maintaining and mounting a heavy engine crankshaft oil seal.

Background

The crankshaft is one of the important parts of an automobile engine, and converts gas pressure transmitted by a piston connecting rod into torque to drive a transmission system of the automobile, a valve actuating mechanism of the engine and other devices. The oil seal of the engine crankshaft is a skeleton oil seal, which consists of a metal skeleton ring and a rubber sealing layer (ring), is sleeved at the end part of a crankshaft neck and is arranged in a crankshaft oil seal base hole of an engine shell, and the rubber sealing layer (ring) is used for controlling an oil film to limit the leakage of lubricating oil in the engine and prevent silt, dust and moisture from invading into the engine from the outside.

The existing installation of an engine crankshaft oil seal is that a positioning sleeve is used for positioning in the radial direction of a crankshaft, a sliding hammer is used for sliding on a sliding rod in a reciprocating mode to impact a pressing plate, and the positioning sleeve and the oil seal are pushed to move axially towards an oil seal base hole. The defects are that the hammering strength of the sliding hammer is not easy to control; the axial dimension of the tool is long, accessories such as a water tank at the front part of an engine and the like need to be disassembled when the vehicle is repaired, the labor and the time are wasted, the efficiency is low, and the attendance rate of the vehicle is influenced.

Disclosure of Invention

The invention aims to provide a special device for maintaining and installing a heavy engine crankshaft oil seal, which ensures the installation quality of the oil seal, is beneficial to the driving safety of a vehicle, is small, exquisite, light, convenient and easy to carry, is simple and convenient to operate, has high efficiency, can be used during the overhaul of an engine, can be used in emergency with the vehicle on a maintenance site, has fewer disassembly accessories during the maintenance of the vehicle, and can effectively improve the maintenance speed so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a special device for maintenance and installation of a heavy engine crankshaft oil seal comprises an engine shell, a crankshaft and an oil seal, wherein the engine shell is provided with an oil seal base hole matched with the crankshaft, and the neck end of the crankshaft penetrates through the oil seal base hole; the oil seal sleeve is arranged at the shaft end of the crankshaft and is embedded into a hole of the oil seal base; the device also comprises an oil seal positioning pushing sleeve, a turbine, a rear cover and a bolt; the front end of the oil seal positioning pushing sleeve is matched with the oil seal and pushes against the oil seal, the outer diameter of the oil seal positioning pushing sleeve is smaller than the outer diameter of the oil seal, the inner diameter of the oil seal positioning pushing sleeve is larger than the outer diameter of the front end of the crankshaft journal, and the oil seal positioning pushing sleeve is positioned in the radial direction by means of the crankshaft journal; the bottom of the rear end of the oil seal positioning pushing sleeve is provided with a sleeve positioning hole through which a bolt penetrates; the turbine is matched with the oil seal positioning pushing sleeve through a threaded structure; the rear cover is provided with a worm, the worm is in transmission connection with the turbine, and the bottom of the rear end of the rear cover is provided with a rear cover positioning hole through which a bolt penetrates; the bolt sequentially penetrates through the rear cover, the turbine, the oil seal positioning pushing sleeve and the oil seal, and fixes the rear cover, the turbine, the oil seal positioning pushing sleeve and the oil seal on a journal of the crankshaft.

Preferably, the oil seal positioning pushing sleeve is in a reducing cylinder shape with a bottom, and the smaller inner diameter of the oil seal positioning pushing sleeve is matched with a journal of a crankshaft; the outer diameter of the front end of the oil seal positioning pushing sleeve is smaller than the inner diameter of a hole of an oil seal base, and the outer diameter of the rear end of the oil seal positioning pushing sleeve is provided with a sleeve external thread and matched with a turbine internal thread on a turbine through the sleeve external thread.

Preferably, the turbine is cylindrical, the inner diameter of the turbine is provided with a turbine internal thread, the outer diameter of the turbine is provided with turbine teeth, and the turbine teeth are matched with the worm.

Preferably, the rear cover is cylindrical with a bottom, the inner diameter of the front end of the rear cover is matched with the turbine, a boss is arranged on one radial side of the rear cover, a worm is inserted in the boss, the axis of the worm is vertically staggered with the axis of the rear cover, worm teeth on the worm are meshed with the turbine teeth, and the end face of the head of the worm is hexagonal and is matched with a wrench for rotary driving.

Preferably, the bolt is a cylinder, and the front end of the bolt is provided with a positioning thread matched with a threaded hole in the crankshaft.

Preferably, the oil seal positioning pushing sleeve, the turbine, the rear cover and the bolt are sequentially installed in the axis direction of the crankshaft.

Compared with the prior art, the invention has the following beneficial effects:

the special device for maintaining and installing the heavy engine crankshaft oil seal utilizes the outer diameter of the crankshaft end and the bolt for positioning, ensures that an installation tool is not deflected and does not rotate, ensures that the oil seal can be smoothly and stably installed in place under the action force of the worm gear mechanism fixed by the bolt and the sleeve positioned and pushed by the oil seal, has uniform and easy stress, is convenient to install the engine oil seal after being used, can effectively ensure that the oil seal is not damaged, ensures the installation quality of the crankshaft and the oil seal on the engine, prolongs the service life of the repaired engine, reduces the fault rate of vehicles and improves the attendance rate of the vehicles; the whole tool is short in axial size, the disassembly quantity of accessories at the front end of the engine can be greatly reduced, the maintenance speed is effectively increased, and the vehicle can be put into production as soon as possible.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the oil seal positioning pushing sleeve of the present invention;

FIG. 3 is a schematic view of the turbine configuration of the present invention;

FIG. 4 is a schematic view of the rear cover structure of the present invention;

fig. 5 is a schematic view of the bolt structure of the present invention.

In the figure: 1. the oil seal positions and pushes the bush; 2. external threads of the sleeve; 3. a sleeve positioning hole; 4. a turbine internal thread; 5. a turbine; 6. a turbine tooth; 7. a worm; 8. a rear cover; 9. a bolt; 10. a rear cover positioning hole; 11. a crankshaft; 12. an engine housing; 13. an oil seal base bore; 14. a threaded hole; 15. and (7) oil sealing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a special device for maintenance and installation of a heavy engine crankshaft oil seal comprises an engine shell 12, a crankshaft 11 and an oil seal 15, wherein the engine shell 12 is provided with an oil seal base hole 13 matched with the crankshaft 11, and the neck end of the crankshaft 11 penetrates through the oil seal base hole 13; the oil seal 15 is sleeved at the shaft end of the crankshaft 11 and is embedded into the oil seal base hole 13; the device also comprises an oil seal positioning pushing sleeve 1, a turbine 5, a rear cover 8 and a bolt 9; the front end of the oil seal positioning pushing sleeve 1 is matched with the oil seal 15 and pushes against the oil seal 15, the outer diameter of the oil seal positioning pushing sleeve 1 is smaller than that of the oil seal 15, the inner diameter of the oil seal positioning pushing sleeve 1 is larger than that of the front end of the crankshaft 11 journal, and the oil seal positioning pushing sleeve 1 is positioned in the radial direction by means of the crankshaft 11 journal; the bottom of the rear end of the oil seal positioning pushing sleeve 1 is provided with a sleeve positioning hole 3 through which a bolt 9 penetrates; the turbine 5 is matched with the oil seal positioning pushing sleeve 1 through a thread structure; a worm 7 is arranged on the rear cover 8, the worm 7 is in transmission connection with the worm wheel 5, and a rear cover positioning hole 10 through which a bolt 9 penetrates is arranged at the bottom of the rear end of the rear cover 8; the bolt 9 sequentially passes through the rear cover 8, the turbine 5, the oil seal positioning pushing sleeve 1 and the oil seal 15, and fixes the rear cover 8, the turbine 5, the oil seal positioning pushing sleeve 1 and the oil seal 15 on a shaft neck of the crankshaft 11.

Referring to fig. 2, in the above embodiment, the oil seal positioning pushing sleeve 1 is in a shape of a reducing cylinder with a bottom, and the smaller inner diameter of the oil seal positioning pushing sleeve is matched with the journal of the crankshaft 11 to perform positioning and guiding functions; the outer diameter of the front end of the oil seal positioning pushing sleeve 1 is smaller than the inner diameter of an oil seal base hole 13, a tool is convenient to take out after installation, the inner diameter of the oil seal positioning pushing sleeve 1 is larger than the inner diameter of a framework of an oil seal 15, the annular end face of the front part of the oil seal positioning pushing sleeve 1 acts axial thrust on the framework of the oil seal 15 close to the outer diameter, and the oil seal 15 is pushed to enter the oil seal base hole 13 of the engine shell 12; the outer diameter of the rear end of the oil seal positioning pushing sleeve 1 is provided with a sleeve external thread 2, the sleeve external thread 2 is matched with a turbine internal thread 4 on a turbine 5 to generate axial pushing force, the bottom of the rear end of the oil seal positioning pushing sleeve is provided with two sleeve positioning holes 3, a bolt 9 penetrates through the sleeve positioning holes 3 to be fixed in a shaft neck threaded hole 14 of a crankshaft 11, and the oil seal 15 is limited to position the oil seal positioning pushing sleeve 1 to rotate radially.

Referring to fig. 3, in the above embodiment, the worm wheel 5 is cylindrical, the inner diameter of the worm wheel is provided with the worm wheel internal thread 4, the outer diameter of the worm wheel is provided with the worm wheel teeth 6, and the worm wheel teeth 6 are matched with the worm 7 to generate axial thrust, so that the worm wheel teeth are matched with the worm 7 to generate radial rotation torque.

Referring to fig. 4, in the above embodiment, the rear cover 8 is a cylindrical shape with a bottom, the inner diameter of the front end of the rear cover is matched with the turbine 5, a boss is arranged on one radial side of the rear cover 8, the worm 7 is inserted into the boss, the axis of the worm 7 is vertically staggered with the axis of the rear cover 8, worm teeth on the worm 7 are meshed with the turbine teeth 6, the end face of the head of the worm 7 is hexagonal, the worm 7 can be rotated by a wrench to drive the turbine 5 to rotate radially, two rear cover positioning holes 10 are designed at the bottom of the rear end, and the bolt 9 can position the rear cover 8 through the rear cover positioning holes 10 to limit the rear cover 8 to.

Referring to fig. 5, in the above embodiment, the bolt 9 is a cylinder, and the front end of the bolt 9 is provided with a positioning thread to match with the threaded hole 14 in the crankshaft 11, so as to limit the axial backward movement of the oil seal positioning pushing sleeve 1, the turbine 5 and the rear cover 8 and the radial rotation of the oil seal positioning pushing sleeve 1 and the rear cover 8.

The working principle is as follows: when the oil seal 15 on the crankshaft 11 is installed, firstly, the oil seal 15 is sleeved at the end part of the crankshaft 11 and pushed along the journal until the position is close to the oil seal base hole 13, then, a small amount of clean lubricating oil is smeared on the inner surface of the oil seal positioning pushing sleeve 1, and then, the oil seal positioning pushing sleeve 1 is sleeved on the journal of the crankshaft 11, the lubricating oil film can enable the oil seal positioning pushing sleeve 1 to slide smoothly, and meanwhile, the journal is protected from being scratched, and the oil seal positioning pushing sleeve is in contact with an oil seal; the rear cover 8 is sleeved on the turbine 5 and screwed into the external thread 2 of the sleeve together with the turbine 5; two bolts 9 are screwed into the threaded holes 14 of the crankshaft 11 through the positioning holes 10 of the rear cover, the turbine 5 and the positioning holes 3 of the sleeve, and the rear cover 8 is limited to axially move backwards, so that the two bolts 9 are uniformly stressed; use the rotatory worm 7 of spanner to drive 5 radial rotations of turbine, turbine internal thread 4 cooperatees with sleeve external screw thread 2 and produces axial thrust, promotes oil blanket 15 forward movement, ensures that oil blanket 15 atress is balanced, does not incline, in the oil blanket base hole 13 of engine housing 12 is packed into accurately, after 15 installations of oil blanket, take off this instrument for installation can.

In summary, the following steps: the special device for maintaining and installing the heavy engine crankshaft oil seal is driven by the worm wheel 5, the worm 7 and threads, is uniformly and easily stressed, is convenient to install the engine oil seal 15 after being used, can effectively ensure that the oil seal 15 is not damaged, ensures the installation quality of the crankshaft 11 and the oil seal 15 on the engine, prolongs the service life of the repaired engine, reduces the failure rate of vehicles, and improves the attendance rate of the vehicles; the whole tool is short in axial size, the disassembly quantity of accessories at the front end of the engine can be greatly reduced, the maintenance speed is effectively increased, and the vehicle can be put into production as soon as possible.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. A special device for maintenance and installation of a heavy engine crankshaft oil seal comprises an engine shell (12), a crankshaft (11) and an oil seal (15), wherein the engine shell (12) is provided with an oil seal base hole (13) to be matched with the crankshaft (11), and the neck end of the crankshaft (11) penetrates through the oil seal base hole (13); the oil seal (15) is sleeved at the shaft end of the crankshaft (11) and is embedded into the oil seal base hole (13); the method is characterized in that: the device also comprises an oil seal positioning pushing sleeve (1), a turbine (5), a rear cover (8) and a bolt (9); the front end of the oil seal positioning pushing sleeve (1) is matched with the oil seal (15) and presses the oil seal (15), the outer diameter of the oil seal positioning pushing sleeve (1) is smaller than that of the oil seal (15), the inner diameter of the oil seal positioning pushing sleeve (1) is larger than that of the front end of the journal of the crankshaft (11), and the oil seal positioning pushing sleeve is positioned in the radial direction by means of the journal of the crankshaft (11); the bottom of the rear end of the oil seal positioning pushing sleeve (1) is provided with a sleeve positioning hole (3) through which a bolt (9) penetrates; the turbine (5) is matched with the oil seal positioning pushing sleeve (1) through a thread structure; a worm (7) is arranged on the rear cover (8), the worm (7) is in transmission connection with the turbine (5), and a rear cover positioning hole (10) through which a bolt (9) penetrates is formed in the bottom of the rear end of the rear cover (8); bolt (9) pass back lid (8), turbine (5), oil blanket location in proper order and promote sleeve (1) and oil blanket (15) to fix back lid (8), turbine (5), oil blanket location and promote sleeve (1) and oil blanket (15) on the axle journal of bent axle (11).

2. The special device for repairing and installing the oil seal of the heavy engine crankshaft as claimed in claim 1, wherein: the oil seal positioning pushing sleeve (1) is in a reducing cylinder shape with a bottom, and the smaller inner diameter of the oil seal positioning pushing sleeve is matched with a shaft neck of a crankshaft (11); the outer diameter of the front end of the oil seal positioning pushing sleeve (1) is smaller than the inner diameter of an oil seal base hole (13), the outer diameter of the rear end of the oil seal positioning pushing sleeve (1) is provided with a sleeve external thread (2), and the sleeve external thread (2) is matched with a turbine internal thread (4) on a turbine (5).

3. The special device for repairing and installing the oil seal of the heavy engine crankshaft as claimed in claim 1, wherein: the worm wheel (5) is cylindrical, the inner diameter of the worm wheel is provided with a worm wheel internal thread (4), the outer diameter of the worm wheel internal thread is provided with worm wheel teeth (6), and the worm wheel teeth (6) are matched with the worm (7).

4. The special device for repairing and installing the oil seal of the heavy engine crankshaft as claimed in claim 1, wherein: the rear cover (8) is in a cylindrical shape with a bottom, the inner diameter of the front end of the rear cover is matched with the turbine (5), a boss is arranged on one radial side of the rear cover (8), a worm (7) is inserted into the boss, the axis of the worm (7) is vertically staggered with the axis of the rear cover (8), worm teeth on the worm (7) are meshed with the turbine teeth (6), and the end face of the head of the worm (7) is hexagonal and is matched with a wrench for rotary driving.

5. The special device for repairing and installing the oil seal of the heavy engine crankshaft as claimed in claim 1, wherein: the bolt (9) is a cylinder, and the front end of the bolt (9) is provided with a positioning thread which is matched with a threaded hole (14) in the crankshaft (11).

6. The special device for repairing and installing the oil seal of the heavy engine crankshaft as claimed in claim 1, wherein: the oil seal positioning pushing sleeve (1), the turbine (5), the rear cover (8) and the bolt (9) are sequentially installed in the axis direction of the crankshaft (11).