CN213088528U

CN213088528U - Back main bearing cap with strong sealing performance for forklift engine crankshaft

Info

Publication number: CN213088528U
Application number: CN202021752876.9U
Authority: CN
Inventors: 孟志兰
Original assignee: Hangzhou Songlin Crankshaft Manufacturing Co ltd
Current assignee: Hangzhou Songlin Crankshaft Manufacturing Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-04-30
Anticipated expiration: 2030-08-20

Abstract

The utility model discloses a forklift engine crankshaft is with back main bearing cap that leakproofness is stronger, including well solid face, lower port, interior anchor ring face, agree with the groove, the left and right sides of well solid face all is provided with the side dome face, and the outside of side dome face is fixed with the lateral plane, settle in the lateral plane's the outside has outer tangent plane, and the upper surface of circumscribed face has seted up the port, settle the surface of bearing cap end has the bulge loop face, and the intermediate position of bulge loop face is provided with a groove, the screw rod through-hole sets up in the inside of bearing cap end, and the effective nuclear wire casing of outside fixed surface of side cambered surface, the bottom of screw rod through-hole is connected with down the port, and the bottom surface of bearing cap end is provided with interior anchor ring face, the bottom surface of bearing cap end is provided with the agree with the groove. The bearing assembly can be stably rotated through the fixed support of the bearing assembly through the fixed end and the bearing cover end, and easily damaged parts such as a rolling body retainer can be placed to a certain extent by external force and damaged through better bearing and compression resistance relief.

Description

Back main bearing cap with strong sealing performance for forklift engine crankshaft

Technical Field

The utility model relates to a mechanical parts technical field specifically is the stronger back main bearing cap of forklift engine crankshaft of leakproofness.

Background

The main bearing is a bearing for supporting a crankshaft in an engine, the bearing is an important component of a steam turbine, and the main bearing is also called a radial bearing. Its function is to bear the entire weight of the rotor and the centrifugal forces due to rotor mass imbalance, determining the correct radial position of the rotor in the cylinder. Because each bearing needs to bear higher load and the rotating speed of the shaft neck is very high, the bearings of the steam turbine all adopt a bush type sliding bearing taking liquid friction as a theoretical basis, and an oil film is formed between the shaft neck and the bush by means of lubricating oil with certain pressure to establish liquid friction, so that the steam turbine can safely and stably operate.

In the use process of a rear main bearing cap in the market, foreign matters such as dust invade the inner side of a roller path of a rolling body to generate abrasion, lubricating oil leaks out to adhere to the surface to cause pollution and adsorb dust to solidify, vulnerable parts such as a rolling body retainer are damaged by external force, and the fixed contact surface does not have the problem that the matching part is inconvenient to align when in splicing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a forklift engine crankshaft that leakproofness is stronger is with back main bearing cap to solve the raceway inboard that foreign matters such as dust proposed in the above-mentioned background art invade the rolling element and produce wearing and tearing, lubricating oil leaks the adhesion surface and causes the pollution to adsorb the dust and solidify, vulnerable part such as rolling element holder receives external force and damages, and fixed contact surface does not have the inconvenient problem of aiming at in the amalgamation in position.

In order to achieve the above object, the utility model provides a following technical scheme: the rear main bearing cap for the forklift engine crankshaft with high sealing performance comprises a middle fixing surface, side slope surfaces, side planes, outer tangent planes, an upper port, a bearing cap end, side arc surfaces, convex ring surfaces, block grooves, a fixing end, a screw rod through hole, an effective nuclear line groove, a lower port, an inner ring surface and a fit groove, wherein the side slope surfaces are arranged on the left side and the right side of the middle fixing surface, the side planes are fixed on the outer sides of the side slope surfaces, the outer tangent planes are arranged on the outer sides of the side planes, the upper port is formed in the upper surface of the outer tangent plane, the bearing cap ends are arranged on the front side and the rear side of the middle fixing surface, the side arc surfaces are fixed on the left side and the right side of the bearing cap end, the convex ring surfaces are arranged on the outer surfaces of the bearing cap ends, the block grooves are arranged in the middle of the convex ring surfaces, the lower port is fixed at the bottom end of the bearing cap end, the screw rod, the bottom of the screw rod through hole is connected with a lower port, an inner ring surface is arranged on the bottom side surface of the bearing cover end, and a matching groove is formed in the bottom end surface of the bearing cover end.

Preferably, a communication structure is formed between the upper port and the screw through hole, and the circumscribed surface is symmetrical about a vertical central line of the middle fixing surface.

Preferably, the convex ring surface is fixedly connected with the bearing cover end, and the diameter of the arc of the side arc surface is 26 mm.

Preferably, the convex ring surface and the block groove are connected through welding, and the fixing end and the bearing cover end are connected through welding.

Preferably, a communicating structure is formed between the lower port and the screw through hole, and the effective nuclear line groove is tightly attached to the side cambered surface.

Preferably, the fit groove penetrates through the outer surface of the bearing cover end, and the inner annular surface is fixedly connected with the bearing cover end.

Compared with the prior art, the beneficial effects of the utility model are that:

the rear main bearing cover for the forklift engine crankshaft with strong sealing performance is provided with an upper port and a screw rod through hole, the inner side of the rear main bearing cover can be attached to a fixed assembly to avoid sliding through the upper port and the screw rod through hole in a hole mode that a screw opening for placing a bolt is gradually shrunk in size from outside to inside, the outer side face of the rear main bearing cover can be gradually attached to other installation components, the rear main bearing cover has good strength and pressure resistance, the sealing performance of an inner side fixed bearing can be guaranteed through tight fit and fixation of a convex ring face and a bearing cover end, and foreign matters such as dust and the like can be prevented from invading the inner side of a roller path of a rolling body to generate abrasion through the;

the rear main bearing cover for the forklift engine crankshaft with strong sealing performance is provided with the oil convex ring surface and the oil convex ring groove, so that lubricating oil in a rolling assembly can be prevented from leaking through the convex ring surface and the oil convex ring groove by the fixed rubber ring, the lubricating oil can only act on a rolling body and a rolling channel and can not leak to adhere to the surface to cause pollution and adsorb dust, the rotation stability of a shaft body can be ensured through the fixed support of the bearing assembly by the fixed end and the bearing cover end, and easily damaged parts such as a rolling body retainer and the like can be placed to a certain extent by better bearing and compression resistance relief and damage due to external force;

this forklift engine crankshaft that leakproofness is stronger sets up effective nuclear line groove and side cambered surface with back main bearing cap, can let it fix so that to the symmetry axis and the surface slotted hole processing of part through imitating nuclear line groove and side cambered surface so that measure, and can conveniently imitate just and check the size in order to promote the part essence to the part after production is accomplished, can let its contact block through depressed groove and protruding contact position fix the position of installation when installing through the bearing cap end that agrees with the groove and run through in, the suggestion that goes on when making its installation convenient for agree with completely installs so that whether the installation is accomplished in the judgement.

Drawings

FIG. 1 is a schematic view of the front three-dimensional structure of the present invention;

fig. 2 is a schematic top plan view of the present invention;

FIG. 3 is a schematic view of the partial cross-sectional structure of the present invention;

FIG. 4 is a schematic view of the bottom plane structure of the present invention;

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

In the figure: 1. middle fixing surface; 2. a side slope surface; 3. a side plane; 4. cutting into external sections; 5. an upper port; 6. a cap bearing end; 7. a side arc surface; 8. a convex ring surface; 9. a block groove; 10. a fixing end; 11. a screw through hole; 12. a nuclear power generating line slot; 13. a lower port; 14. an inner ring surface; 15. fitting the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-5, the present invention provides a technical solution: the rear main bearing cap for the forklift engine crankshaft with strong sealing property comprises a middle fixing surface 1, side slope surfaces 2, side planes 3, an outer tangent plane 4, an upper port 5, a bearing cap end 6, side arc surfaces 7, a convex ring surface 8, a block groove 9, a fixing end 10, a screw through hole 11, an effective nuclear line groove 12, a lower port 13, an inner ring surface 14 and a fitting groove 15, wherein the side slope surfaces 2 are arranged on the left side and the right side of the middle fixing surface 1, the side planes 3 are fixed on the outer sides of the side slope surfaces 2, the outer tangent plane 4 is arranged on the outer sides of the side planes 3, the upper port 5 is arranged on the upper surface of the outer tangent plane 4, a communicating structure is formed between the upper port 5 and the screw through hole 11, the outer tangent plane 4 is symmetrical relative to the vertical central line of the middle fixing surface 1, the upper port 5 and the screw through hole 11 are arranged, the inner sides of the upper port 5 and the screw through a hole mode that screws for placing bolts are gradually contracted from the outside to the inside size so as to avoid sliding, the outer side surface can be gradually attached to other installation parts, and the strength and the pressure resistance are good; bearing cover ends 6 are arranged on the front side and the rear side of the middle fixing surface 1, side arc surfaces 7 are fixed on the left side and the right side of each bearing cover end 6, the convex ring surface 8 is fixedly connected with the corresponding bearing cover end 6, the arc diameter of each side arc surface 7 is 26 mm, the oil convex ring surface 8 and the corresponding bearing cover end 6 are arranged, the convex ring surface 8 and the corresponding bearing cover end 6 can be tightly matched and fixed to ensure the sealing performance of the inner-side fixing bearing, and foreign matters such as dust and the like can be prevented from invading the inner side of a roller path of the rolling body to generate abrasion through the sealing performance;

the outer surface of the bearing cover end 6 is provided with a convex ring surface 8, the middle position of the convex ring surface 8 is provided with a block groove 9, the convex ring surface 8 and the block groove 9 are connected in a welding way, the fixing end 10 and the bearing cover end 6 are connected in a welding way, the oil convex ring surface 8 and the block groove 9 are arranged, the lubricating oil in the rolling assembly can be ensured not to leak through the fixed rubber ring by the convex ring surface 8 and the block groove 9, and the lubricating oil can only act on the rolling body and the rolling channel and can not leak to adhere to the surface to cause pollution and adsorb dust; the bottom end of the bearing cover end 6 is fixedly provided with a lower port 13, a communicating structure is formed between the lower port 13 and the screw through hole 11, the effective nuclear line groove 12 is tightly attached to the side cambered surface 7, the fixing end 10 and the bearing cover end 6 are arranged, the fixing end 10 and the bearing cover end 6 can ensure that the bearing assembly is stably rotated through fixed support on a bearing assembly, and easily damaged parts such as a rolling element retainer and the like can be placed to a certain extent through better bearing and compression resistance relief and damaged by external force;

the screw rod through hole 11 is arranged in the bearing cover end 6, the outer side surface of the side arc surface 7 is fixedly provided with an effective nuclear line groove 12, the bottom end of the screw rod through hole 11 is connected with a lower port 13, the bottom side surface of the bearing cover end 6 is provided with an inner annular surface 14, the bottom end surface of the bearing cover end 6 is provided with a fit groove 15, the fit groove 15 penetrates through the outer surface of the bearing cover end 6, the inner annular surface 14 is fixedly connected with the bearing cover end 6, the effective nuclear line groove 12 and the side arc surface 7 are arranged, the effective nuclear line groove 12 and the side arc surface 7 can be fixed with measuring equipment so as to conveniently measure the symmetrical axis and the surface groove hole of a part, the part can be conveniently corrected and checked in size after production to improve the part precision, the bearing cover end 6 through which the fit groove 15 penetrates is arranged, the bearing cover end 6 through which the fit groove 15 penetrates can be used for positioning the mounting position through the contact clamping of a concave groove and a convex contact part during mounting, when the installation is carried out, the installation is carried out according to the prompt carried out when the installation is completely matched so as to conveniently judge whether the installation is finished.

The working principle is as follows: for the rear main bearing cap, firstly, the radian of the slope is processed between a middle fixed surface 1 and a side slope 2 in a cutting and polishing mode, a tangent plane similar to a vertical angle is arranged between a side plane 3 and an outer tangent plane 4 and is connected with the side plane, the whole outer side surface is symmetrical about a vertical central line, the outer side diameter of an upper port 5 of the outer tangent plane 4 is larger and is gradually smaller inwards, the size of the bottommost port is the same as the size of the whole diameter of a screw through hole 11, the structure of a lower port 13 is the same as that of the upper port 5, the bottom end is gradually smaller towards the upper side port, components such as a sealing rubber ring and the like can be placed on the inner side of a convex ring surface 8 and are matched and fixed with the components through a block groove 9, an effective nuclear line groove 12 on the arc surface of a side arc surface 7 on two sides of a bearing cap end 6 can be tested by measuring surface grooving and the like through, when the two assemblies are connected by self construction, the rectangular blocks with the same size as the bottom surface matching grooves 15 of the fixing end 10 are filled to the inner side for fixing, so that the two assemblies are conveniently spliced, and the use process of the whole rear main bearing cap is completed.

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. The strong back main bearing cap of forklift engine crankshaft of leakproofness is with well solid face (1), side slope face (2), side plane (3), external tangent plane (4), last port (5), hold lid end (6), side cambered surface (7), protruding anchor ring (8), piece groove (9), close end (10) admittedly, screw rod through-hole (11), imitate nuclear line groove (12), lower port (13), interior anchor ring (14), agree with groove (15), its characterized in that: the left side and the right side of the middle fixing surface (1) are both provided with side slope surfaces (2), the outer sides of the side slope surfaces (2) are fixed with side planes (3), the outer sides of the side planes (3) are provided with outer tangent surfaces (4), the upper surface of each outer tangent surface (4) is provided with an upper port (5), the front side and the rear side of the middle fixing surface (1) are provided with bearing cover ends (6), the left side and the right side of each bearing cover end (6) are fixed with side arc surfaces (7), the outer surface of each bearing cover end (6) is provided with a convex ring surface (8), the middle position of each convex ring surface (8) is provided with a block groove (9), the bottom end of each bearing cover end (6) is fixed with a lower port (13), the screw rod through hole (11) is arranged inside each bearing cover end (6), the outer side surface of each side arc surface (7) is fixed with an effective nuclear wire groove (12), the bottom end of the screw, and the bottom side surface of the bearing cover end (6) is provided with an inner ring surface (14), and the bottom end surface of the bearing cover end (6) is provided with a matching groove (15).

2. The highly sealable rear main bearing cap for a forklift engine crankshaft according to claim 1, wherein: a communication structure is formed between the upper port (5) and the screw rod through hole (11), and the outer tangent plane (4) is symmetrical about the vertical central line of the middle fixing plane (1).

3. The highly sealable rear main bearing cap for a forklift engine crankshaft according to claim 1, wherein: the convex ring surface (8) is fixedly connected with the bearing cover end (6), and the arc diameter of the side arc surface (7) is 26 mm.

4. The highly sealable rear main bearing cap for a forklift engine crankshaft according to claim 1, wherein: the convex ring surface (8) and the block groove (9) are connected by welding, and the fixing end (10) and the bearing cover end (6) are connected by welding.

5. The highly sealable rear main bearing cap for a forklift engine crankshaft according to claim 1, wherein: a communicating structure is formed between the lower port (13) and the screw through hole (11), and the nucleus-killing line groove (12) is tightly attached to the side cambered surface (7).

6. The highly sealable rear main bearing cap for a forklift engine crankshaft according to claim 1, wherein: the fit groove (15) penetrates through the outer surface of the bearing cover end (6), and the inner annular surface (14) is fixedly connected with the bearing cover end (6).