CN213117182U - Mould for assembling engineering plastic retainer for deep groove ball bearing - Google Patents

Abstract

The utility model belongs to the field of bearing assembly, and particularly discloses a die for assembling a engineering plastic retainer for a deep groove ball bearing, which comprises an upper die and a lower die; a positioning structure is arranged in the middle of the lower die, and a positioning hole is formed in the middle of the upper die; a steel ball uniform seat is embedded in the mounting groove on the bearing positioning surface, and arc positioning grooves are distributed on the steel ball uniform seat; the bottom surface of the upper die is provided with a boss; the utility model solves the problem of accurate positioning of the engineering plastic retainer in the assembling process according to the structural characteristics of the engineering plastic retainer for the deep groove ball bearing, reduces the external force required by the assembly of the engineering plastic retainer for the deep groove ball bearing, improves the assembling efficiency of the engineering plastic retainer, avoids the damage of the engineering plastic retainer in the assembling process, and ensures the service life reliability of the bearing; the method can prevent the surface precision of the steel ball from being damaged due to the dislocation of the locking notch of the engineering plastic retainer and the steel ball, and avoid influencing the high-speed performance of the steel ball.

Description

Mould for assembling engineering plastic retainer for deep groove ball bearing

Technical Field

The utility model relates to a bearing assembly field specifically is a mould is used in assembly of engineering plastics holder for deep groove ball bearing.

Background

With the high-speed development of new energy automobiles, the market demand for improving the high-speed performance of the deep groove ball bearing is more and more strong; in order to improve the high-speed performance of the deep groove ball bearing, a retainer in the bearing is usually made of solid or non-metal materials, and the retainer made of engineering plastic materials is optimal at present in terms of cost performance. Therefore, the engineering plastic retainer is mainly selected in the retainer for the high-speed deep groove ball bearing in the bearing industry at present.

At present, the assembly of the engineering plastic retainer for the front and rear bearings of the input shaft of the new energy pure electric drive automobile gearbox adopts a manual press-fitting mode for the engineering plastic retainer, so that on one hand, the surface of a steel ball is scratched or napped due to poor positioning accuracy of the steel ball and the retainer, thereby influencing the rotation accuracy of the steel ball and causing low bearing vibration measurement qualified rate, and the engineering plastic retainer is broken in the assembly process (without the damage of internal tissues which cannot be set by naked eyes of people); on the other hand, the requirement on the operating skill of the operator is high; meanwhile, due to the manual press-fitting, the labor intensity of operators is high, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mould is used in assembly of engineering plastics holder for deep groove ball bearing to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a mould for assembling an engineering plastic retainer for a deep groove ball bearing comprises an upper mould and a lower mould; the middle part of the lower die is provided with a positioning structure protruding upwards, and the middle part of the upper die is provided with a positioning hole in interference fit connection with the positioning structure; a bearing positioning surface for bearing placement is formed on the lower die at the periphery of the positioning structure, a bearing hole in the middle of the bearing is sleeved on the positioning structure, a circle of mounting groove with an invagination structure is formed in the bearing positioning surface, a steel ball uniform seat is embedded in the mounting groove, and arc positioning grooves with the number equal to that of steel balls mounted in the bearing are uniformly distributed on the steel ball uniform seat; and bosses are respectively arranged at the positions of the bottom surface of the upper die, which correspond to the arc positioning grooves.

Preferably, a circumferential positioning groove is formed in the side face of the lower die, and a circumferential positioning rod which is inserted into the circumferential positioning groove in a matched mode is arranged at the position, corresponding to the side face of the upper die, of the upper die.

Preferably, the steel ball uniform seat is fixed in the mounting groove through a bolt, and a plurality of threaded holes for bolt connection are formed in the bottom surface of the steel ball uniform seat at equal intervals.

Preferably, a space for placing the engineering plastic retainer is reserved on a bearing between the upper die and the lower die, pockets for clamping the steel balls are respectively arranged at positions corresponding to the steel balls on the engineering plastic retainer, locking openings for the steel balls to enter are formed in the pockets, and the bosses are used for pressing the steel balls into the corresponding pockets through the locking openings.

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

1. the utility model solves the problem of accurate positioning of the engineering plastic retainer in the assembling process according to the structural characteristics of the engineering plastic retainer for the deep groove ball bearing, reduces the external force required by the assembly of the engineering plastic retainer for the deep groove ball bearing, improves the assembling efficiency of the engineering plastic retainer, avoids the damage of the engineering plastic retainer in the assembling process, and ensures the service life reliability of the bearing; the method can prevent the surface precision of the steel ball from being damaged due to the dislocation of the locking notch of the engineering plastic retainer and the steel ball, and avoid influencing the high-speed performance of the steel ball.

2. The utility model adopts the method of upper and lower die positioning, the lower die is provided with a steel ball equalizing seat, arc grooves with the number equal to that of steel balls arranged in a bearing are uniformly distributed on the steel ball equalizing seat, the main function of the utility model is to ensure the uniform distribution of the steel balls in the bearing and limit the steel balls to move in the circumferential direction when stressed; the upper die adopts a boss design with the same distribution as that of the steel balls, so that the stress of each ball pocket hole of the engineering plastic retainer in the assembling process is uniform, the elastic opening amount of the locking opening is equal, and the required external force is also minimum. The design that a positioning rod is inserted into the positioning groove is adopted between the upper die and the lower die, so that the circumferential displacement between the upper die and the lower die is limited, and the assembly and disassembly of the die during operation are facilitated; meanwhile, the upper die is provided with a positioning mandrel, and the positioning mandrel is inserted into an inner hole of the bearing inner ring during operation, so that the positioning accuracy of the upper die and the lower die is ensured.

3. The utility model discloses can directly use the press equipment, make the assembly damage rate greatly reduced of engineering plastics holder, the qualification rate of testing vibration has promoted about 10%, and assembly efficiency has promoted about 20%, also can apply to the automatic assembly of bearing engineering plastics holder.

Drawings

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

FIG. 2 is a schematic view of the steel ball equalizing seat of the present invention;

FIG. 3 is a schematic view of the detailed structure of the circumferential positioning groove and the mounting groove of the lower mold of the present invention;

fig. 4 is a schematic structural view of an upper die of the present invention;

FIG. 5 is a schematic sectional view of the engineering plastic holder of the present invention;

fig. 6 is a schematic diagram of the steel ball and the pocket of the present invention.

In the figure: 1. an upper die; 2. a lower die; 3. a positioning structure; 4. a bearing bore; 5. positioning holes; 6. a circumferential positioning groove; 7. a circumferential positioning rod; 8. mounting grooves; 9. uniformly dividing the steel balls into seats; 10. an arc positioning groove; 11. A threaded hole; 12. a boss; 13. a bearing; 14. a steel ball; 15. an engineering plastic cage; 16. a bearing locating surface; 17. a pocket hole; 18. and (6) locking the opening.

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.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and 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.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-6, the present invention provides a technical solution: a kind of deep groove ball bearing uses the assembly of the engineering plastic cage and uses the mould, including upper die 1 and lower die 2; the middle part of the lower die 2 is provided with a positioning structure 3 protruding upwards, and the middle part of the upper die 1 is provided with a positioning hole 5 connected with the positioning structure 3 in an interference fit manner; a bearing positioning surface 16 for placing a bearing 13 is formed on the lower die 2 at the periphery of the positioning structure 3, a bearing hole 4 in the middle of the bearing 13 is sleeved on the positioning structure 3, a circle of mounting groove 8 with an invagination structure is arranged on the bearing positioning surface 16, a steel ball equalizing seat 9 is embedded in the mounting groove 8, and arc positioning grooves 10 with the number equal to that of steel balls 14 arranged on the bearing 13 are uniformly distributed on the steel ball equalizing seat 9; and bosses 12 are respectively arranged at the positions of the bottom surface of the upper die 1 corresponding to the arc positioning grooves 10.

Furthermore, circumference constant head tank 6 has been seted up to 2 sides of lower mould, go up mould 1 side and correspond the position department and be provided with the cooperation and insert circumference locating lever 7 in the circumference constant head tank 6.

Further, the steel ball equal-division seat 9 is fixed in the mounting groove 8 through bolts, and a plurality of threaded holes 11 for bolt connection are formed in the bottom surface of the steel ball equal-division seat 9 at equal intervals.

Furthermore, a space for placing an engineering plastic retainer 15 is reserved on a bearing 13 between the upper die 1 and the lower die 2, a pocket 17 for clamping the steel ball 14 is respectively arranged at a position on the engineering plastic retainer 15 corresponding to each steel ball 14, a locking opening 18 for the steel ball 14 to enter is formed in each pocket 17, and the boss 12 is used for pressing the steel ball 14 into the corresponding pocket 17 through the locking opening 18.

The working principle is as follows: the upper die 1 is connected with the positioning structure 3 at the top of the positioning structure 3 in the middle of the lower die 2 in an interference fit manner, so that the upper die 1 and the positioning structure 3 are coaxial; the upper die and the lower die are convenient to close, the time for closing the upper die and the lower die is shortened, and the assembly efficiency is improved;

as shown in fig. 2, the arc positioning slots 10 which are equal to the number of the steel balls 14 arranged on the bearing 13 and are uniformly distributed are designed on the steel ball equalizing seat 9, the design enables the steel balls 14 to be uniformly distributed and positioned correctly, and meanwhile, the steel ball equalizing seat 9 is made of bakelite materials, so that the steel balls 14 can be effectively prevented from being damaged in the press-fitting process;

as shown in fig. 4, the upper die 1 is designed with bosses 12 of the same number as the steel balls 14 and positioned at the same vertical line with the center of the steel balls 14, so as to ensure that both sides of a locking notch 18 on the upper die are uniformly stressed when the engineering plastic retainer 15 is pressed, the elastic spreading amount of the locking notch 18 is uniform and consistent in the pressing process, the axial displacement of the upper die is limited by the height of the bosses, and the upper die 1 cannot move down again after the plane of the upper die 1 is contacted with the end faces of the inner ring and the outer ring of the bearing 13, so that the problem of pressing damage of the engineering plastic retainer due to overload can be effectively prevented; wherein:

the height H of the boss is equal to the distance between the engineering plastic retainer and the end face of the outer ring of the bearing after the engineering plastic retainer is installed in place, and the difference value between the ball diameter of a pocket hole of the engineering plastic retainer and the ball diameter of a steel ball is subtracted;

therefore, the engineering plastic retainer can be assembled in place, and the overload problem of the engineering plastic retainer in the press fitting process is thoroughly avoided;

in the process of press mounting of the engineering plastic retainer 15, the positioning structure 3 is inserted into the bearing hole 4, so that the left and right movement, the front and back movement of the upper die 1 are limited, and the coaxiality of the upper die and the lower die is ensured. The lower die 2 is provided with a mounting groove 8, the function of the mounting groove is that the steel ball uniform seat 9 on the lower die 1 is embedded in the mounting groove, the effect of limiting the left and right displacement and the front and back displacement of the steel ball uniform seat 9 is achieved, the coaxiality of the lower die 1 and the steel ball uniform seat 9 is ensured, and the lower die 2 and the steel ball uniform seat 9 are fixed by adopting a bolt connection mode. In the aspect of limiting the circumferential positions of the upper die and the lower die, the design of combining the circumferential positioning rods 7 with the circumferential positioning grooves 6 is adopted, and in the press fitting process of the engineering plastic retainer 15, the circumferential positioning rods 7 on the upper die 1 are inserted into the circumferential positioning grooves 6 on the lower die 2, so that the circumferential correct positioning of the upper die and the lower die during die assembly is ensured, and meanwhile, the circumferential dislocation of the upper die and the lower die in the press fitting process of the engineering plastic retainer 15 is also prevented.

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 (4)

1. A die for assembling an engineering plastic retainer for a deep groove ball bearing is characterized by comprising an upper die (1) and a lower die (2); the middle part of the lower die (2) is provided with a positioning structure (3) protruding upwards, and the middle part of the upper die (1) is provided with a positioning hole (5) in interference fit connection with the positioning structure (3); a bearing positioning surface (16) for placing a bearing (13) is formed on the lower die (2) at the periphery of the positioning structure (3), a bearing hole (4) in the middle of the bearing (13) is sleeved on the positioning structure (3), a circle of mounting groove (8) with an invagination structure is arranged on the bearing positioning surface (16), a steel ball equalizing seat (9) is embedded in the mounting groove (8), and arc positioning grooves (10) with the number equal to that of steel balls (14) mounted on the bearing (13) are uniformly distributed on the steel ball equalizing seat (9); and bosses (12) are respectively arranged at the positions of the bottom surface of the upper die (1) corresponding to the arc positioning grooves (10).

2. The mold for assembling the engineering plastic cage for the deep groove ball bearing according to claim 1, wherein: the side surface of the lower die (2) is provided with a circumferential positioning groove (6), and a circumferential positioning rod (7) which is inserted into the circumferential positioning groove (6) in a matched manner is arranged at a corresponding position on the side surface of the upper die (1).

3. The mold for assembling the engineering plastic cage for the deep groove ball bearing according to claim 1, wherein: the steel ball equipartition seat (9) is fixed in the mounting groove (8) through bolts, and a plurality of threaded holes (11) for bolt connection are arranged on the bottom surface of the steel ball equipartition seat (9) at equal intervals.

4. The mold for assembling the engineering plastic cage for the deep groove ball bearing according to claim 1, wherein: go up the mould (1) and reserve on bearing (13) between lower mould (2) and have the space of placing engineering plastics holder (15), correspond each steel ball (14) position punishment on engineering plastics holder (15) and be provided with one pocket hole (17) that are used for joint steel ball (14) respectively, offer fore shaft (18) that supply steel ball (14) to get into on each pocket hole (17), boss (12) are used for impressing steel ball (14) in corresponding pocket hole (17) through fore shaft (18).

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