CN220432174U - Oil seal press-fitting device - Google Patents

Abstract

The utility model provides an oil seal press-fitting device which is used for combining an oil seal with an oil seal seat and comprises a base, a guide positioning column and a pressure driving mechanism; the base is provided with a first groove, the guiding positioning column comprises a large-diameter part and a small-diameter part which are coaxially connected, the oil jacket is arranged on the peripheral wall of the small-diameter part, the oil seal seat is sleeved on the outer peripheral wall of the large-diameter part, the bottom of the oil seal seat is supported on the base, and the large-diameter part is in sliding insertion connection in the first groove; the pressure driving mechanism is used for driving the guiding and positioning the post moves towards the bottom of the first recess, so as to drive the oil seal to enter the oil seal seat and be in interference fit with the oil seal seat. According to the utility model, the guide positioning column is driven to move downwards through the pressure driving mechanism so as to drive the oil seal to be in interference fit in the oil seal seat, the guide positioning column plays a role in guiding up and down, the press mounting process is simple to operate, the oil seal and the oil seal seat are not required to be deliberately aligned, the guide positioning mechanism has the functions of guiding and positioning, and the operation is simple.

Description

Oil seal press-fitting device

Technical Field

The utility model belongs to the technical field of oil seal assembly, and particularly relates to an oil seal press-fitting device.

Background

The main function of the oil seal is to prevent liquid or solids may leak out of the system, or functional parts that prevent dust from entering the interior of the system. The ST-type cartridge type oil seal is a typical representative of a novel oil seal, and can ensure a good sealing effect in various severe environments, and has been widely used in the field of agricultural paddy field machinery in recent years.

The structural form and the requirement of the ST-type box-type oil seal are the largest differences with the traditional framework oil seal:

1. the inner ring and the outer ring of the oil seal move relatively, the inner lip of the oil seal and the outer wall of the matching shaft form a seal, and the damage of the oil seal caused by the defect of the shaft body is eliminated;

2. after the oil seal is assembled, proper axial scraping clearance is required to be ensured;

3. the fit interference of the inner/outer ring of the oil seal with the cavity and the shaft increases the friction coefficient, and lubricating oil cannot be smeared before assembly.

Therefore, due to the special structural form, the ST-type box-type oil seal has more severe requirements on the assembly process, however, the oil seal press-fitting device in the prior art cannot ensure the accuracy of oil seal assembly, and the press-fitting automation is low, so that the press-fitting efficiency is reduced.

Disclosure of Invention

The utility model mainly aims to provide an oil seal press-fitting device, which aims to solve the technical problems that the oil seal press-fitting device in the prior art cannot guarantee the accuracy of oil seal assembly and has lower press-fitting efficiency.

In order to achieve the above object, the present utility model provides an oil seal press-fitting device for seating an oil seal and an oil seal, comprising:

the base is provided with a first groove;

the guide positioning column comprises a large-diameter part and a small-diameter part which are coaxially connected, the small-diameter part comprises a first peripheral wall used for oil supply sleeve arrangement, the large-diameter part comprises a second peripheral wall used for oil supply sleeve arrangement, and the large-diameter part is in sliding insertion connection in the first groove; and

and the pressure driving mechanism is used for pressing the guide positioning column to move towards the bottom of the first groove so as to drive the oil seal to enter the oil seal seat and be in interference fit with the oil seal seat.

In the embodiment of the utility model, the guide positioning column is provided with a through shaft hole along the axial direction, the inside of the through shaft hole is coaxially provided with a convex ring, the oil seal press-fitting device also comprises a positioning pin shaft coaxially arranged in the through shaft hole, one end of the positioning pin shaft is a free end and penetrates through the convex ring, and the other end of the positioning pin shaft is connected with the base.

In the embodiment of the utility model, the top end of the positioning pin shaft is provided with a flanging part, and a gasket is arranged between the flanging part and the convex ring.

In an embodiment of the utility model, the oil seal press-fitting device further comprises an elastic reset piece, wherein the elastic reset piece is axially wound on the periphery of the positioning pin shaft, and two ends of the elastic reset piece are respectively abutted between the convex ring and the first groove.

In the embodiment of the utility model, the pressure driving mechanism comprises a pressure head and a driving piece for driving the pressure head to move downwards, the bottom of the pressure head is open and covers the outer side wall of the small-diameter part, and the lower end part of the pressure head is abutted against the upper end part of the oil seal.

In an embodiment of the present utility model, an outer diameter of the ram is less than or equal to an inner diameter of the oil seal seat.

In the embodiment of the utility model, the pressure head and the guiding positioning column are both made of nylon materials.

In an embodiment of the utility model, a second groove is formed on the bottom end surface of the base, a communication hole is formed between the bottom walls of the first groove and the second groove, and the bottom end of the positioning pin shaft penetrates through the communication hole and is located in the second groove.

In an embodiment of the present utility model, a cotter pin for locking the positioning pin shaft and the base is disposed in the second groove.

In an embodiment of the utility model, an adjusting washer is arranged on the bottom wall of the first groove.

Through the technical scheme, the oil seal press-fitting device provided by the embodiment of the utility model has the following beneficial effects:

before press fitting, the oil seal is sleeved on the outer peripheral wall of the small-diameter part of the guide positioning column, the oil seal seat is sleeved on the outer peripheral wall of the large-diameter part, then the pressure head is sleeved from the upper end of the guide positioning column downwards, finally, the guide positioning column is driven to move downwards by the pressure driving mechanism so as to drive the oil seal to be in interference fit in the oil seal seat, the lower extreme lateral wall of direction reference column cooperates with the inside wall of the first recess of base, and the diameter is unanimous with the aperture of oil blanket seat, plays the direction effect from top to bottom, just so can realize need not to deliberately pendulum oil blanket and oil blanket seat, reaches the purpose of direction, location, has guaranteed the precision of oil blanket assembly position, and pressure equipment process easy operation has improved whole pressure equipment efficiency.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic diagram of a press-fit cross-section of an oil seal press-fit device according to an embodiment of the utility model;

FIG. 2 is a schematic cross-sectional view of an oil seal press-fitting device before press-fitting an oil seal according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an oil seal press-fitting device according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an oil seal press-fitting apparatus according to an embodiment of the present utility model;

fig. 5 is a schematic cross-sectional view of a guide positioning column in an oil seal press-fitting apparatus.

Description of the reference numerals

Reference numerals	Name of the name	Reference numerals	Name of the name
				1	Oil seal	6	Elastic resetting piece
2	Oil seal seat	7	Adjusting washer
				3	Pressure head	8	Cotter pin
4	Guiding positioning column	9	Gasket
				41	Large diameter portion	10	Base seat
42	Small diameter portion	11	First groove
				43	Convex ring	12	Second groove
5	Positioning pin shaft

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The oil seal press-fitting device according to the present utility model, which is preferably an ST-type cartridge type oil seal, is described below with reference to the accompanying drawings, and is mainly applied to the technical field of agricultural machinery.

As shown in fig. 2, 3 and 4, in an embodiment of the present utility model, there is provided an oil seal 1 press-fitting apparatus for combining an oil seal 1 and an oil seal seat 2, comprising:

the base 10, offer the first recess 11 on the base 10;

the guiding and positioning column 4 comprises a large-diameter part 41 and a small-diameter part 42 which are coaxially connected, the small-diameter part 42 is positioned above the large-diameter part 41, the small-diameter part 42 comprises a first peripheral wall for sleeving the oil seal 1, the large-diameter part 41 comprises a second peripheral wall for sleeving the oil seal seat 2, the bottom of the oil seal seat 2 is supported on the base 10, the large-diameter part 41 is slidably inserted in the first groove 11, the outer diameter of the small-diameter part 42 at the upper end is matched with the inner diameter of the oil seal 1 to position the horizontal position of the oil seal 1, and the height of the shaft shoulder of the guiding and positioning column 4 is positioned at the height position of the pressed oil seal 1; and

the pressure driving mechanism is used for driving the guide positioning column 4 to move towards the bottom of the first groove 11 so as to drive the oil seal 1 to enter the oil seal seat 2 and be in interference fit with the oil seal seat 2, when the guide positioning column 4 contacts the bottom of the first groove 11, the oil seal 1 and the oil seal seat 2 are assembled in a sealing manner, a certain distance is kept between the bottom of the oil seal 1 and the bottom of the oil seal seat 2, and then press fitting is completed.

According to the utility model, the guide positioning column 4 is driven to move downwards through the pressure driving mechanism so as to drive the oil seal 1 to be in interference fit in the oil seal seat 2, the outer side wall of the lower end of the guide positioning column 4 is matched with the inner side wall of the first groove 11 of the base 10, the diameter of the guide positioning column is consistent with the aperture of the oil seal seat 2, the guide positioning column plays a role in guiding up and down, the oil seal 1 and the oil seal seat 2 do not need to be deliberately aligned, the guide positioning function is realized, the precision of the assembly position of the oil seal 1 is ensured, and the press mounting process is simple to operate.

As shown in fig. 5, the guiding and positioning column 4 is provided with a through shaft hole along the axial direction, a convex ring 43 is coaxially arranged in the through shaft hole, the oil seal 1 press-fitting device further comprises a positioning pin 5 coaxially arranged in the through shaft hole, one end of the positioning pin 5 is a free end and penetrates through the convex ring 43, the other end of the positioning pin is connected with the base 10, the positioning pin 5 not only plays a role in connecting the guiding and positioning column 4 and the base 10, but also plays a guiding role in the moving process of the guiding and positioning column 4 towards the first groove 11, and the deviation of central axes of the guiding and positioning column 4 and the first groove 11 is prevented. Wherein, because the central shaft hole is formed in the middle of the convex ring 43, the through shaft hole is in a step hole structure.

In order to better realize automatic resetting of the guiding positioning column 4, the pressing device of the oil seal 1 further comprises an elastic resetting piece 6, the elastic resetting piece 6 is axially wound on the periphery of the positioning pin 5, and two ends of the elastic resetting piece 6 are respectively abutted between the convex ring 43 and the first groove 11. As shown in fig. 1, after the press fitting, the whole guiding and positioning column 4 moves downwards, while the positioning pin 5 keeps unchanged in position, the elastic restoring member 6 has elastic force due to being compressed between the bottom wall of the convex ring 43 and the bottom wall of the first groove 11, when the press fitting is completed, the elastic restoring member 6 applies upward elastic restoring force to the guiding and positioning column 4, and the guiding and positioning column 4 realizes automatic restoration under the action of the elastic restoring member 6, thereby facilitating blanking, avoiding redundant actions, effectively ensuring the press fitting quality of the oil seal 1 and improving the assembly efficiency. Wherein the elastic restoring element 6 is preferably a spring. In addition, after the press fitting is completed, the press returns, under the action of external thrust, the whole body of the oil seal 1 and the oil seal seat 2 after the assembly is jacked up, the pressure head 3 is removed, and the assembly is removed, so that the whole press fitting work is completed.

In the embodiment of the utility model, the top end of the positioning pin 5 is provided with a flanging part (namely a pin cap), a gasket 9 is arranged between the flanging part and the convex ring 43, and the flanging part is hung on the gasket 9; when the positioning pin shaft 5 is in an initial state, the top of the positioning pin shaft 5 stretches into the cavity above the convex ring 43, when the pressure head 3 downwards applies pressure to the guiding positioning column 4 under the action of the press, the guiding positioning column 4 moves relative to the positioning pin shaft 5, the bottom end of the positioning pin shaft 5 is always connected in the base 10, and the top end moves relative to the guiding positioning column 4 in the cavity above the convex ring 43.

In the embodiment of the utility model, the pressure driving mechanism comprises a pressure head 3 and a driving piece for driving the pressure head 3 to move downwards, the bottom of the pressure head 3 is open and covers the outer side wall of the small-diameter part 42, and the lower end part of the pressure head 3 is abutted against the upper end part of the oil seal 1. The inner hole of the pressure head 3 is matched with the outer side wall of the upper end of the small-diameter part 42 of the guide positioning column 4, so that the bottom surface of the pressure head 3 is vertical to the pressing direction in the pressing process, and the pressing deflection phenomenon of the oil seal 1 is not easy to occur; the outer side wall of the pressure head 3 corresponds to the outer side wall of the oil seal 1 and has the same outer diameter, so that the lower end face of the pressure head 3 can be directly abutted with the upper end face of the oil seal 1. During press fitting, the oil seal 1 is sleeved on the periphery of the small-diameter part 42 of the guide positioning column 4, the oil seal 1 is positioned at the joint of the small-diameter part 42 and the large-diameter part 41, then the pressure head 3 is sleeved on the upper end of the small-diameter part 42 of the guide positioning column 4, and the driving piece drives the pressure head 3 to start press fitting downwards. Wherein the driving member is a press for driving the ram 3 to move downwards.

In order to allow the ram 3 to enter the oil seal seat 2 during the downward movement of the pressing guide positioning column 4, the outer diameter of the ram 3 is set to be smaller than or equal to the inner diameter of the oil seal seat 2. In order to prevent the damage to the oil seal 1 caused by the pressure head 3 and the guide positioning column 4 in the press fitting process, the pressure head 3 and the guide positioning column 4 are made of nylon materials, the nylon material cost is low, and the cost of the whole oil seal 1 press fitting device is reduced.

In the embodiment of the utility model, the bottom end surface of the base 10 is provided with the second groove 12, a communication hole is formed between the first groove 11 and the bottom wall of the second groove 12, and the bottom end of the positioning pin 5 penetrates through the communication hole and is sunk in the second groove 12, so that the top end of the positioning pin 5 cannot protrude from the second groove 12, and the whole press-fitting device can be horizontally placed on a workbench.

In order to facilitate the disassembly and assembly of the whole press-fitting device, the split pin 8 used for locking the positioning pin 5 and the base 10 is arranged in the second groove 12, so that the positioning pin 5 and the base 10 can be detachably connected, and when the split pin 8 is disassembled, the parts can be replaced. After the press-fitting is completed, the distance between the horizontal plane of the bottom wall of the oil seal 1 and the horizontal plane of the top of the oil seal seat 2 is ensured to be 1 mm-1.2 mm, however, because the oil seal 1 is a plastic part, after the press fitting is finished, the oil seal 1 has certain rebound, so that the distance between the oil seal 1 and the oil seal seat 2 exceeds the required range; in the early research process, an adjusting washer 7 is arranged on the bottom wall of the first groove 11 so as to realize micro adjustment of the pressing depth of the oil seal 1, and the rebound quantity of the oil seal 1 can be explored by adjusting the number and the thickness of the washers 7 in the press mounting process of the pressure head 3 on the oil seal 1; after the adjusting washer 7 is determined, the same adjusting washer 7 is adopted in the subsequent press fitting process, so that the position accuracy of the oil seal 1 after the press fitting is finished and rebounded is effectively ensured.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. An oil blanket pressure equipment device for with oil blanket (1) and oil blanket seat (2) close piece, its characterized in that includes:

the base (10), the first groove (11) is formed in the base (10);

the guide positioning column (4) comprises a large-diameter part (41) and a small-diameter part (42) which are coaxially connected, the small-diameter part (42) comprises a first peripheral wall for sleeving an oil seal (1), the large-diameter part (41) comprises a second peripheral wall for sleeving an oil seal seat (2), and the large-diameter part (41) is in sliding insertion connection in the first groove (11); and

and the pressure driving mechanism is used for pressing the guide positioning column (4) to move towards the bottom of the first groove (11) so as to drive the oil seal (1) to enter the oil seal seat (2) and be in interference fit with the oil seal seat (2).

2. The oil seal press-fitting device according to claim 1, wherein the guide positioning column (4) is provided with a through shaft hole along the axial direction, a convex ring (43) is coaxially arranged in the through shaft hole, the oil seal press-fitting device further comprises a positioning pin shaft (5) axially arranged in the through shaft hole, one end of the positioning pin shaft (5) is a free end and penetrates through the convex ring (43), and the other end of the positioning pin shaft is connected with the base (10).

3. The oil seal press-fitting device according to claim 2, wherein the tip of the positioning pin (5) has a burring portion, and a gasket (9) is provided between the burring portion and the collar (43).

4. The oil seal press-fitting device according to claim 2, further comprising an elastic restoring member (6), wherein the elastic restoring member (6) is axially wound around the outer periphery of the positioning pin shaft (5), and two ends of the elastic restoring member (6) are respectively abutted between the convex ring (43) and the first groove (11).

5. The oil seal press-fitting device according to claim 1, wherein the pressure driving mechanism comprises a press head (3) and a driving member for driving the press head (3) to move downward, the bottom of the press head (3) is open and covered on the outer side wall of the small-diameter portion (42), and the lower end portion of the press head (3) abuts against the upper end portion of the oil seal (1).

6. The oil seal press-fitting device according to claim 5, wherein an outer diameter of the press head (3) is smaller than or equal to an inner diameter of the oil seal seat (2).

7. The oil seal press-fitting device according to claim 5, wherein the pressing head (3) and the guiding and positioning column (4) are both made of nylon material.

8. The oil seal press-fitting device according to claim 2, wherein a second groove (12) is provided on a bottom end surface of the base (10), a communication hole is formed between the first groove (11) and a bottom wall of the second groove (12), and a bottom end of the positioning pin (5) penetrates through the communication hole and is submerged in the second groove (12).

9. The oil seal press-fitting device according to claim 8, wherein a cotter pin (8) for locking the positioning pin (5) and the base (10) is provided in the second groove (12).

10. The oil seal press-fitting device according to any one of claims 1 to 9, characterized in that an adjusting washer (7) is provided on the bottom wall of the first groove (11).