CN219234483U

CN219234483U - Bearing press-fitting tool

Info

Publication number: CN219234483U
Application number: CN202223372404.2U
Authority: CN
Inventors: 王志敏; 熊铭; 张布陶; 蔡静; ***
Original assignee: Ruili Group Ruian Auto Parts Co Ltd
Current assignee: Ruili Group Ruian Auto Parts Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-23
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to the technical field of tools, in particular to a bearing press-fitting tool. A bearing press-fitting tool comprises a first press-fitting assembly and a second press-fitting assembly; the first press fitting assembly comprises a first press head assembly and a first base assembly which are coaxially arranged, and the first press head assembly is positioned above the first base assembly; the second press-fitting assembly comprises a second press-head assembly and a second base assembly which are coaxially arranged, and the second press-head assembly is positioned above the second base assembly; wherein, first pressure head subassembly and second pressure head subassembly simultaneous syntropy motion. In this application, just can realize assembling big bearing and little bearing simultaneously at the both ends of connecting rod through one step pressure equipment technology, compare in prior art, use the bearing pressure equipment frock of this application, assemble big bearing and little bearing simultaneously at the both ends of connecting rod, production efficiency is higher.

Description

Bearing press-fitting tool

Technical Field

The utility model relates to the technical field of tools, in particular to a bearing press-fitting tool.

Background

A bearing connecting rod assembly is arranged in the air compressor; the bearing connecting rod assembly comprises a connecting rod, wherein a connecting rod big end and a connecting rod small end are respectively formed at two ends of the connecting rod, a big hole is formed in the connecting rod big end, a small hole is formed in the connecting rod small end, the big hole and the small hole are through holes, and the hole core line of the big hole is parallel to the hole core line of the small hole; the bearing connecting rod assembly further comprises a large bearing and a small bearing, wherein the large bearing is pressed into the large hole through a press-fitting process, and the small bearing is pressed into the small hole through the press-fitting process.

The large bearing and the small bearing are respectively pressed into a large hole and a small hole on the connecting rod, and are usually completed by a bearing press-fitting tool; by adopting the bearing press-fitting tool in the prior art, only one bearing can be usually press-fitted at a time, for example, the large end of the connecting rod is firstly placed in the bearing press-fitting tool, the large bearing is press-fitted into the large hole through the bearing press-fitting tool, then the small end of the connecting rod is placed in the bearing press-fitting tool, and the small bearing is press-fitted into the small hole through the bearing press-fitting tool.

To sum up, the bearing press-fitting tool in the prior art cannot realize that the large bearing and the small bearing are simultaneously assembled at the two ends of the connecting rod through a one-step press-fitting process, and the production efficiency is low.

Disclosure of Invention

Aiming at the technical problem of lower production efficiency in the prior art, the utility model provides a bearing press-fitting tool.

The utility model is realized by the following technical scheme:

a bearing press-fitting tool comprises a first press-fitting assembly and a second press-fitting assembly;

the first press fitting assembly comprises a first press head assembly and a first base assembly which are coaxially arranged, and the first press head assembly is positioned above the first base assembly;

the second press-fitting assembly comprises a second press-head assembly and a second base assembly which are coaxially arranged, and the second press-head assembly is positioned above the second base assembly;

wherein, first pressure head subassembly and second pressure head subassembly simultaneous syntropy motion.

Further, the first pressure head assembly comprises a mounting part, wherein the mounting part is provided with a mounting hole along the radial direction, and a blocking part is arranged in the mounting hole;

the first pressure head assembly further comprises a ball plunger, and the plunger tail of the ball plunger is inserted into the mounting hole and is abutted to the blocking part; the whole or part of the plunger head of the ball plunger extends out of the mounting hole.

Further, the first pressure head assembly further comprises a sliding part, the sliding part is positioned above the mounting part, the sliding part is coaxially connected with the mounting part, and the cross section diameter of the sliding part is larger than that of the mounting part;

the first pressure head assembly further comprises a pressure head seat, a first opening is formed in the bottom of the pressure head seat, and the sliding part extends into the first opening and is in sliding contact with the wall of the first opening;

the bottom of the pressure head seat is also provided with at least one protruding foot which protrudes outwards from the lower surface of the pressure head seat towards the direction of the first base assembly.

Further, the device also comprises a transverse plate, a bottom plate, a plurality of guide posts and at least one guide spring;

the plate surfaces of the transverse plates are parallel to the plate surfaces of the bottom plates, the transverse plates are positioned above the bottom plates, and a space is reserved between the transverse plates and the bottom plates;

the extending direction of the guide posts is perpendicular to the plate surface of the transverse plate, the transverse plate is provided with a plurality of through holes, one end of any guide post is connected with the bottom plate, and the other end of any guide post is movably inserted into one of the through holes; the guide spring is arranged between the bottom plate and the transverse plate;

the first pressure head assembly and the second pressure head assembly are arranged on the lower surface of the transverse plate; the first base component and the second base component are arranged on the upper surface of the bottom plate; the first ram assembly, the second ram assembly, the first base assembly, and the second base assembly are all located within the spacing.

Further, a containing cavity is formed in the pressure head seat and is communicated with the first opening;

the upper end of the sliding part is provided with a widening part which is accommodated in the accommodating cavity, the diameter of the widening part is larger than the aperture of the first opening, and the side wall of the widening part is in clearance fit with the inner wall of the accommodating cavity.

Further, the first pressure head assembly further comprises a spring assembly, and the spring assembly is arranged in the accommodating cavity; one end of the spring component is abutted to the top wall of the accommodating cavity, and the other end of the spring component is abutted to the widening part.

Further, a blind hole extending along the vertical direction is also arranged in the widened part, or the blind hole is arranged in the widened part and the sliding part;

the first pressure head assembly further comprises a connecting rod, the connecting rod and the blind hole are coaxially arranged, the upper end of the connecting rod is connected with the top wall of the accommodating cavity, the lower end of the connecting rod is inserted into the blind hole, and the lower end of the connecting rod is in movable contact with the wall of the blind hole;

the spring assembly is sleeved on the connecting rod.

Further, a first guide part is formed below the mounting part, and the first guide part is coaxial with the mounting part;

the first base component comprises a first positioning seat, the first positioning seat is provided with a first guide hole, and the central line of the first guide part is coaxial with the hole core line of the first guide hole;

when the first guide part is inserted into the first guide hole, the first guide part forms clearance fit with the first guide hole.

Further, the second base assembly comprises a second positioning seat, a floating spring and a floating pin;

a mounting cavity is formed in the second positioning seat, an opening is formed in the upper surface of the second positioning seat, the lower end of the floating pin extends into the mounting cavity from the opening, and the outer surface of the lower end of the floating pin is in clearance fit with the inner wall of the mounting cavity;

one end of the floating spring is abutted against the bottom wall of the mounting cavity, and the other end of the floating spring is abutted against the lower end of the floating pin;

the upper end of the floating pin protrudes out of the mounting cavity, and the upper end diameter of the floating pin is configured to a preset diameter.

Further, a limiting groove with a preset length is formed on the side face of the floating pin, the limiting groove extends along the length direction of the floating pin, and a first limiting part and a second limiting part are respectively formed at two ends of the limiting groove;

a limiting block is arranged on the inner wall of one side of the mounting cavity and inserted into the limiting groove, and the limiting block is located between the first limiting part and the second limiting part.

Compared with the prior art, the utility model has the advantages that:

1. in this application, first base subassembly and second base subassembly are used for placing big end of connecting rod and connecting rod tip respectively, and first pressure head subassembly is used for pressing big bearing to the big hole of connecting rod tip in, second pressure head subassembly is used for pressing the tip bearing to the little hole of connecting rod tip in, and, first pressure head subassembly and second pressure head subassembly can simultaneous downward movement, this has led to, press-fitting the tip bearing to the little hole of connecting rod tip in, press-fitting the big bearing to the big hole of connecting rod tip in, these two steps can go on simultaneously, trade the angle, in this application, only through one step press-fitting technology, just can realize assembling big bearing and tip bearing at the both ends of connecting rod simultaneously. In summary, compared with the prior art, the two-step press-fitting process is needed to be carried out for pressing the large bearing and the small bearing at the two ends of the connecting rod, and the bearing press-fitting tool can be used for pressing the large bearing and the small bearing at the two ends of the connecting rod only by one-step press-fitting process, namely, compared with the prior art, the bearing press-fitting tool has the advantages that one-step press-fitting step is reduced, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the region I in FIG. 1;

FIG. 3 is a schematic view of the structure of the region II in FIG. 1;

FIG. 4 is a schematic view of a press-fit use process;

fig. 5 is a schematic structural diagram of the region III in fig. 1.

The marks in the figure: the novel high-pressure hydraulic pressure head comprises a first pressure head assembly (1), a first base assembly (2), a second pressure head assembly (3), a second base assembly (4), a mounting part (5), a mounting hole (6), a blocking part (7), a ball plunger (8), a sliding part (9), a pressure head seat (10), a first opening (11), a protruding foot (12), a transverse plate (13), a bottom plate (14), a guide pillar (15), a guide spring (16), a through hole (17), a containing cavity (18), a widening part (19), a spring assembly (20), a blind hole (21), a connecting rod (22), a first guide part (23), a first positioning seat (24), a first guide hole (25), a second positioning seat (26), a mounting cavity (27), an opening (28), a floating spring (29), a floating pin (30), a limiting groove (31), a first limiting part (32), a second limiting part (33), a limiting block (34), an outer guide sleeve (35), a stress step (36), a guide seat (37), a limiting plate (38), a first annular protrusion (39) and a second annular protrusion (40).

Detailed Description

The technical scheme of the utility model is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present utility model, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, 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 implicitly indicating the 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. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1, a bearing press-fitting tool according to a preferred embodiment of the present utility model includes a first press-fitting assembly and a second press-fitting assembly; the first press fitting assembly comprises a first press head assembly 1 and a first base assembly 2 which are coaxially arranged, and the first press head assembly 1 is positioned above the first base assembly 2; the second press-fitting assembly comprises a second press-head assembly 3 and a second base assembly 4 which are coaxially arranged, and the second press-head assembly 3 is positioned above the second base assembly 4; wherein the first ram assembly 1 and the second ram assembly 3 move in the same direction at the same time.

The first base component 2 and the second base component 4 can be used for placing a big connecting rod end and a small connecting rod end respectively, in the embodiment, the first base component 2 is used for placing the big connecting rod end, and the second base component 4 is used for placing the small connecting rod end; specifically, the first base component 2 has a first placement surface for placing the big end of the connecting rod, the second base component 4 has a second placement surface for placing the small end of the connecting rod, the first placement surface and the second placement surface are parallel to the horizontal plane, the vertical heights of the first placement surface and the second placement surface can be set according to the specific shape of the connecting rod, in this embodiment, in the vertical direction, the height of the second placement surface is higher than the height of the first placement surface; the specific structure of the first base assembly 2 and the second base assembly 4 is described in detail below.

The first pressure head assembly 1 and the second pressure head assembly 3 are respectively used for pressing a large bearing and a small bearing, in the embodiment, the first pressure head assembly 1 is used for pressing the large bearing, and the second pressure head assembly 3 is used for pressing the small bearing; specifically, the first press head assembly 1 is provided with a first press-mounting surface for press-mounting a large bearing, the second press head assembly 3 is provided with a second press-mounting surface for press-mounting a small bearing, the first press-mounting surface and the second press-mounting surface are planes parallel to a horizontal plane, the first press-mounting surface and the first placing surface are arranged vertically correspondingly, and the second press-mounting surface and the second placing surface are arranged vertically correspondingly; the specific structure of the first ram assembly 1 and the second ram assembly 3 is described in detail below.

Referring to fig. 1 and 4, when in use, the big end of the connecting rod is firstly placed on the first base component 2, the small end of the connecting rod is placed on the second base component 4, then the big bearing is coaxially sleeved on the first pressure head component 1, the small bearing is placed at the small hole, so that the small bearing is coaxial with the small hole, and note that the diameter of the outer ring of the small bearing is slightly larger than the diameter of the small hole, and the small bearing is still positioned outside the small hole at the moment; the first pressure head assembly 1 and the second pressure head assembly 3 move downwards simultaneously, the first pressure head assembly 1 drives the big bearing to move downwards together, the big bearing is gradually pressed into the big hole, meanwhile, the second pressure head assembly 3 gradually presses the small bearing into the small hole, the first pressure head assembly 1 and the second pressure head assembly 3 move downwards to a designated position, the big bearing and the small bearing are assembled with the connecting rod, and the designated position is adjusted according to actual working conditions.

As known from the background description, in the prior art, only one bearing can be press-fitted at a time by the bearing press-fitting tool, for example, a large end of a connecting rod is first placed in the bearing press-fitting tool, the large bearing is press-fitted into a large hole by the bearing press-fitting tool, and then a small end of the connecting rod is placed in the bearing press-fitting tool, and a small bearing is press-fitted into a small hole by the bearing press-fitting tool; namely, the prior art can not realize that the large bearing and the small bearing are assembled at the two ends of the connecting rod simultaneously through a one-step press-fitting process, and in terms of changing the angle, in the prior art, the two ends of the connecting rod are press-fitted with the large bearing and the small bearing, and the two-step press-fitting process is needed to be carried out, so that the production efficiency is lower.

In this embodiment, the first base component 2 and the second base component 4 are respectively used for placing the big end of the connecting rod and the small end of the connecting rod, while the first pressure head component 1 is used for pressing the big bearing into the big hole of the big end of the connecting rod, the second pressure head component 3 is used for pressing the small bearing into the small hole of the small end of the connecting rod, and the first pressure head component 1 and the second pressure head component 3 can move downwards simultaneously, which results in that the small bearing is pressed into the small hole of the small end of the connecting rod and the big bearing is pressed into the big hole of the big end of the connecting rod, and the two steps can be performed simultaneously. In summary, compared with the prior art, the two-step press-fitting process is required to be performed for press-fitting the large bearing and the small bearing at the two ends of the connecting rod, and the press-fitting process is only required to be performed for press-fitting the large bearing and the small bearing at the two ends of the connecting rod by using the bearing press-fitting tool of the embodiment, that is, compared with the prior art, the one-step press-fitting process is reduced, and the production efficiency is improved.

Further, in the prior art, firstly, a large end of a connecting rod is placed in a bearing press-fitting tool, the large bearing is press-fitted into the large end of the connecting rod through the bearing press-fitting tool, after the large bearing is press-fitted, the large end of the connecting rod and a small end of the connecting rod are required to be transposed, then, a small bearing is press-fitted into the small end of the connecting rod through the bearing press-fitting tool, and after the press-fitting is finished, the connecting rod is taken down; in the embodiment, a large connecting rod end and a small connecting rod end are respectively arranged on a first base assembly and a second base assembly, a large bearing is pressed into the large connecting rod end, a small bearing is pressed into the small connecting rod end, two pressing processes are simultaneously carried out, and after the pressing is finished, the connecting rod is taken down; therefore, the bearing press-fitting tool of the embodiment reduces the steps of transposition of the large end and the small end of the connecting rod in the prior art, correspondingly saves the time required by the steps, and further improves the generation efficiency by shortening the time required for press-fitting the large bearing and the small bearing on the connecting rod when changing angles.

In the foregoing, it is mentioned that the large bearing is sleeved on the first pressure head assembly 1, and the friction force between the inner ring of the large bearing and the first pressure head assembly needs to be greater than the self gravity of the large bearing, so as to prevent the large bearing from falling off from the first pressure head assembly in advance or from sliding relatively to the first pressure head assembly in the vertical direction in the process that the first pressure head assembly 1 drives the large bearing to move downwards; in the vertical direction, how to increase the friction between the large bearing and the first ram assembly is a technical problem to be solved, which is solved by the following technical scheme.

With further reference to fig. 1-2, the first ram assembly 1 comprises a mounting portion 5, the mounting portion 5 is provided with a mounting hole 6 in a radial direction, and a blocking portion 7 is provided in the mounting hole 6; the first pressure head assembly 1 further comprises a ball plunger 8, and the plunger tail of the ball plunger 8 is inserted into the mounting hole 6 and is abutted to the blocking part 7; the plunger head of the ball plunger 8 protrudes from the mounting hole 6 in whole or in part.

In the embodiment, the mounting part 5 is in a cylindrical structure, the diameter of the cross section of the mounting part 5 is slightly smaller than the diameter of the inner ring of the bearing of the large bearing, and the large bearing can be sleeved on the outer surface of the mounting part 5; the mounting hole 6 may be a through hole or a blind hole extending along the radial direction of the mounting portion 5, in this embodiment, the mounting hole 6 is a stepped hole penetrating along the radial direction of the mounting portion 5, the stepped hole is composed of a large-diameter hole and a small-diameter hole which are coaxially arranged and are mutually communicated, an arc transition surface is formed at the joint of the large-diameter hole and the small-diameter hole, the ball plunger 8 can be placed from the large-diameter hole, and then pushed to the small-diameter hole by the large-diameter hole through the arc transition surface, which is very convenient; the blocking part 7 is arranged in the mounting hole 6 and is detachably connected with the hole wall of the mounting hole 6, in the embodiment, the mounting part 5 is provided with a threaded hole which is communicated with the mounting hole 6, the blocking part 7 is a screw, and one end of the blocking part 7 is screwed into the threaded hole and is positioned in the mounting hole 6; the ball plunger 8 is a prior art, and reference is specifically made to CN201821310185.6, in which the plunger tail abuts against the stopper 7 and a portion of the plunger head protrudes from the mounting hole 6.

When the large bearing is sleeved on the mounting part 5, the plunger head is extruded by the bearing inner ring of the large bearing, the plunger head pushes the plunger spring to enable the plunger spring to shrink, and the plunger spring in a compressed state gives the plunger head an outward elastic force along the axis direction of the mounting hole 6, and the elastic force increases the friction force between the plunger head and the bearing inner ring of the large bearing; namely, the embodiment solves the technical problem of how to improve the friction force between the large bearing and the first pressure head assembly.

Furthermore, under the influence of other parts of the air compressor, after the big bearing is pressed and assembled to the big end of the connecting rod, the big end of the connecting rod is required to be riveted, and the riveting point can be regarded as an anti-falling measure of the big bearing relative to the big end of the connecting rod; the principle is that a part of the connecting rod which is positioned near the big bearing and positioned at the surface of the connecting rod is deformed towards the axial line direction of the big bearing by locally extruding the position of the upper surface of the big end of the connecting rod, which is close to the big hole, so that the big bearing is clamped in the big hole to prevent the big bearing from being separated from the big end of the connecting rod in the using process; the process step of riveting is usually completed by arranging a plurality of protruding feet on the first pressure head assembly, and further, after the step of pressing the large bearing, in terms of another aspect, during the process of riveting, the mounting part 5 should stop moving downwards along the vertical direction, and the protruding feet 12 should continue to move downwards, so the protruding feet 12 and the mounting part 5 should be configured as a movable connection manner in the vertical direction; how to provide the projecting leg 12 and the mounting portion 5 to be relatively movable is a technical problem to be solved, which is solved by the following technical scheme.

With further reference to fig. 1 and 5, the first ram assembly 1 further comprises a sliding portion 9, the sliding portion 9 is located above the mounting portion 5, the sliding portion 9 is coaxially connected with the mounting portion 5, and the cross-sectional diameter of the sliding portion 9 is larger than the cross-sectional diameter of the mounting portion 5; the first pressure head assembly 1 further comprises a pressure head seat 10, a first opening 11 is formed in the bottom of the pressure head seat 10, and a sliding part 9 extends into the first opening 11 and is in sliding contact with the wall of the first opening 11; the bottom of the press head seat 10 is further formed with at least one protrusion 12, and the protrusion 12 protrudes outward from the lower surface of the press head seat 10 toward the first base assembly 2.

The sliding part 9 has a structure similar to a cylinder, and the connection mode of the sliding part 9 and the mounting part 5 can be integrated into a whole for forming, or can be detachably connected, in the embodiment, the sliding part 9 and the mounting part 5 are integrated into a whole for forming; the cross-sectional diameter of the sliding part 9 is larger than that of the mounting part 5, the mounting part 5 is used for arranging a large bearing, the sliding part 9 is used for being contacted with the upper surface of the large bearing and pushing the large bearing to move downwards, and the first press-fit surface is a part of the bottom surface of the sliding part 9 protruding out of the mounting part 5 along the radial direction, and is shown as the surface A in fig. 5; the upper end of the pressure head seat 10 is connected with the transverse plate 13 through screws; the first opening 11 is a circular hole, and the hole axis of the first opening 11 is on the same line with the central axis of the sliding part 9, preferably, the depth of the first opening 11 is enough to allow the sliding part 9 to be completely accommodated in the first opening 11; the number of the protruding feet 12 may be one or more, in this embodiment, the number of the protruding feet 12 is plural, and the protruding feet 12 are distributed around the sliding portion 9 at intervals, and the protruding feet 12 and the pressing head seat 10 may be detachably connected, or integrally formed, in this embodiment, the protruding feet 12 and the pressing head seat 10 are integrally formed.

In this embodiment, the side wall of the sliding portion 9 is in sliding contact with the wall of the first opening 11, the sliding portion 9 is fixedly connected with the mounting portion 5 coaxially, the sliding portion 9 is in movable contact with the first opening 11, so that the sliding portion can be pushed out, and in the vertical direction, the protruding leg 12 and the mounting portion 5 are relatively movable; therefore, the present embodiment solves the technical problem of how to provide the projecting pin 12 and the mounting portion 5 to be relatively movable.

Further, in the foregoing, it is mentioned that the first ram assembly 1 and the second ram assembly 3 move in the same direction at the same time, and how to implement the simultaneous movement of the first ram assembly 1 and the second ram assembly 3 is a technical problem to be solved, and the technical problem is solved by the following technical scheme.

With further reference to fig. 1, the device further comprises a transverse plate 13, a bottom plate 14, a plurality of guide posts 15 and at least one guide spring 16; the plate surface of the transverse plate 13 is parallel to the plate surface of the bottom plate 14, the transverse plate 13 is positioned above the bottom plate 14, and a space is reserved between the transverse plate 13 and the bottom plate 14; the extending direction of the guide posts 15 is perpendicular to the plate surface of the transverse plate 13, the transverse plate 13 is provided with a plurality of through holes 17, one end of any guide post 15 is connected with the bottom plate 14, and the other end of any guide post 15 is movably inserted into one through hole 17; the guide spring 16 is arranged between the bottom plate 14 and the transverse plate 13; the first pressure head assembly 1 and the second pressure head assembly 3 are arranged on the lower surface of the transverse plate 13; the first base assembly 2 and the second base assembly 4 are mounted on the upper surface of the bottom plate 14; the first ram assembly 1, the second ram assembly 3, the first base assembly 2 and the second base assembly 4 are all located within the spacing.

The cross plate 13 and the bottom plate 14 are both in a flat plate structure, the cross plate 13 can be connected with a stamping mechanism, the cross plate 13 is driven by the stamping mechanism to reciprocate in the vertical direction, the stamping mechanism is not shown in the composition of the stamping machine, and the cross plate 13 can move towards the direction close to the bottom plate 14 or move towards the direction far away from the bottom plate 14; the first pressure head assembly 1 and the second pressure head assembly 3 are both arranged on the transverse plate 13, and the transverse plate 13 synchronously drives the first pressure head assembly 1 and the second pressure head assembly 3 to move in the vertical direction in the process of up-and-down movement of the transverse plate 13; therefore, the present embodiment solves the technical problem of how to realize the simultaneous and same-directional movement of the first ram assembly 1 and the second ram assembly 3.

Further, in order to avoid the abrasion of the outer surface of the guide post 15 by the inner wall of the through hole 17 during the vertical reciprocating movement of the transverse plate 13, the embodiment further includes, arranging an outer guide sleeve 35 in the gap between the guide post 15 and the through hole 17, wherein the material of the outer guide sleeve 35 can be made of known materials such as metal, and in the embodiment, the material of the outer guide sleeve 35 is steel; specifically, the outer guide sleeve 35 is sleeved outside the guide post 15, and the inner wall of the outer guide sleeve is in clearance fit with the guide post 15; the bottom of the outer guide sleeve 35 is provided with a stress step 36, the guide spring 16 is sleeved on the guide post 15, and the upper end of the guide spring 16 is abutted against the stress step 36.

Due to the arrangement of the outer guide sleeve 35, the transverse plate 13 pushes the outer guide sleeve 35 to move downwards together through the stress step 36 in the vertical downward movement process, and the outer guide sleeve 35 extrudes the guide spring 16 to shrink; due to the arrangement of the outer guide sleeve 35, the inner wall of the through hole 17 and the outer surface of the outer guide sleeve 35 are rubbed with each other in the downward movement process of the transverse plate 13, so that the outer surface of the guide post 15 is prevented from being worn by the through hole 17, the outer guide sleeve 35 belongs to a replaceable part, the processing cost is low, the disassembly is easy, and the outer guide sleeve 35 can be replaced at any time if damaged.

Referring further to fig. 1, a guide seat 37 is further provided at the lower end of the guide post 15, and the lower end of the guide spring 16 abuts against the guide seat 37.

With further reference to fig. 1, due to the provision of the guide spring 16, after the press-fitting is completed, the cross plate 13 is lifted upward, and the cross plate 13 is automatically moved upward by the upward elastic force of the guide spring 16.

With further reference to fig. 1, in the process of lifting up the transverse plate 13, in order to avoid excessive elastic force of the guide spring 16, the transverse plate moves upward excessively to separate from the guide post 15, and in the bearing press-fitting tool in this embodiment, a function of automatically stopping the transverse plate 13 when it reaches an initial position upward is further added; a limiting plate 38 is further arranged above the specific guide post 15, and the limiting plate 38 is connected with the guide post 15 through a screw; the limiting plate 38 comprises a limiting transverse plate and a limiting vertical plate which are connected with each other, and when the top of the outer guide sleeve 35 contacts the limiting transverse plate in the upward movement process of the transverse plate 13 under the upward elastic action of the guide spring 16, the transverse plate 13 contacts the limiting vertical plate, so that the outer guide sleeve 35 and the transverse plate 13 stop moving; the position of the limiting plate 38 is the initial position of the transverse plate 13, so the embodiment solves the technical problem that the transverse plate 13 can automatically stop after reaching the initial position.

Mention is made in the foregoing: the sliding contact between the side wall of the sliding portion 9 and the wall of the first opening 11 prevents the sliding portion 9 from being separated from the ram seat 10, which is a technical problem to be solved by the following technical scheme.

With further reference to fig. 1, a receiving cavity 18 is formed in the ram base 10, and the receiving cavity 18 is communicated with the first opening 11; the upper end of the sliding part 9 is provided with a widened part 19, the widened part 19 is accommodated in the accommodating cavity 18, the diameter of the widened part 19 is larger than the aperture of the first opening 11, and the side wall of the widened part 19 is in clearance fit with the inner wall of the accommodating cavity 18.

In this embodiment, the press seat 1 includes an upper seat and a lower seat, the accommodating cavity 18 is formed by buckling the upper seat and the lower seat, the upper seat is above the lower seat, the upper seat and the lower seat are detachably connected, the top of the upper seat is connected with the transverse plate 13 through a screw, and the protruding feet 12 are formed on the lower surface of the lower seat; the widened part 19 and the sliding part 9 are integrally formed, and the widened part 19 is limited in the accommodating cavity 18; in summary, due to the arrangement of the widening portion 19, the sliding portion 9 and the ram seat 10 cannot be separated, i.e. the present embodiment solves the technical problem of how to prevent the sliding portion 9 and the ram seat 10 from being separated.

Further, after the sliding portion 9 and the first opening 11 form a sliding contact structure, how to transmit the vertical downward force of the transverse plate 13 to the sliding portion 9 is solved by the following technical solution.

The first ram assembly 1 further comprises a spring assembly 20, the spring assembly 20 being disposed within the receiving chamber 18; one end of the spring assembly 20 abuts against the top wall of the accommodating cavity 18, and the other end abuts against the widened portion 19.

In this embodiment, the elastic modulus of the spring assembly 20 is larger, the compression force of the spring assembly 20 should be larger than the friction force between the outer surface of the large bearing and the large hole of the large head of the connecting rod, in other words, the transverse plate 13 moves downwards, the spring assembly 20 gives vertical downward pressure to the large bearing in the process of press-fitting the large bearing to the large head of the connecting rod, the vertical upward friction force is larger than the large hole of the large head of the connecting rod to the large bearing, the transverse plate 13 continues to move downwards, the protruding foot 12 presses the connecting rod downwards in the process of riveting the large head of the connecting rod, the connecting rod presses the first positioning seat 24 downwards, the first positioning seat 24 gives a vertical upward reaction force to the spring assembly 20 through the connecting rod and the sliding part 9, and the reaction force is larger than the elastic force of the spring assembly 20 itself, and the spring assembly 20 is compressed. In the present embodiment, the spring assembly 20 is disposed between the cross plate 13 and the sliding portion 9, and the downward force of the cross plate 13 is transmitted to the sliding portion 9 through the spring assembly 20, so that the present embodiment solves the technical problem of how to transmit the vertical downward force of the cross plate 13 to the sliding portion 9.

Further, the spring assembly 20 includes a large spring and a small spring, the large spring and the small spring are coaxially arranged, and the rotation directions of the large spring and the small spring are opposite; the purposes of this arrangement are two: first, if the spring assembly 20 includes only one spring, the bottom of the spring contacts the upper surface of the sliding portion 9 due to the rotation direction of the spring, so that the sliding portion 9 is inclined to one side, which is easy to cause the press-fit failure, while the spring assembly 20 of the embodiment includes a large spring and a small spring with opposite rotation directions, the bottom of the large spring and the bottom of the small spring contact the upper surface of the sliding portion 9 respectively, so that the upper surface of the sliding portion 9 is uniformly stressed, and the sliding portion 9 is prevented from being inclined to one side; secondly, the large and small springs with opposite rotation directions can avoid resonance or resonance, and the content of the part is the prior art, and can be referred to in the literature [ Lixian, zhou Rongjuan ]. The combination of the two springs is used for deepening the understanding of simple harmonic vibration [ J ]. Physical experiment: part of middle school 2004,24 (3): 2].

Further, how to guide the compression and extension directions of the spring assembly 20 is a technical problem to be solved, which is solved by the following technical scheme.

The bearing press-fitting tool of the embodiment is further provided with a blind hole 21 extending in the vertical direction, wherein the blind hole 21 is arranged in the widened portion 19, or the blind hole 21 is arranged in the widened portion 19 and the sliding portion 9; the first pressure head assembly 1 further comprises a connecting rod 22, the connecting rod 22 is coaxially arranged with the blind hole 21, the upper end of the connecting rod 22 is connected with the top wall of the accommodating cavity 18, the lower end of the connecting rod 22 is inserted into the blind hole 21, and the lower end of the connecting rod 22 is movably contacted with the wall of the blind hole 21; the spring assembly 20 is sleeved on the connecting rod 22.

The connecting rod 22 extends along the vertical direction, the spring assembly 20 is sleeved on the connecting rod 22, and the compression and extension directions of the spring assembly 20 are always limited by the connecting rod 22, so that the technical problem of how to guide the compression and extension directions of the spring assembly 20 is solved.

Further, how to guide the mounting portion 5 during the downward movement of the mounting portion 5 is a technical problem to be solved, and the technical problem is solved by the following technical scheme.

With further reference to fig. 1, a first guide portion 23 is formed below the mounting portion 5, the first guide portion 23 being coaxial with the mounting portion 5; the first base assembly 2 comprises a first positioning seat 24, the first positioning seat 24 is provided with a first guide hole 25, and the central line of the first guide part 23 is coaxial with the hole central line of the first guide hole 25; when the first guide portion 23 is inserted into the first guide hole 25, the first guide portion 23 forms a clearance fit with the first guide hole 25. The first placement surface mentioned above, i.e. the top surface of the first positioning seat 24.

In this embodiment, the first guiding portion 23 has a cylindrical structure, and the cross-sectional diameter of the first guiding portion 23 should be smaller than the diameter of the bearing inner ring of the large bearing; the first guide hole 25 is a straight hole extending in the vertical direction; in the process of downward movement of the mounting part 5, the first guide part 23 is gradually inserted into the first guide hole 25, and the hole wall of the first guide hole 25 plays a role in guiding the first guide part 23; therefore, the present embodiment solves the technical problem of how to guide the mounting portion 5.

Further, it is mentioned in the foregoing that, before press-fitting, the small bearing is placed in the small hole of the small end of the connecting rod, and then how to guide the small bearing in the press-fitting process is a technical problem to be solved, and the technical problem is solved by the following technical scheme.

With further reference to fig. 1 and 3, the second base assembly 4 includes a second positioning seat 26, a floating spring 29, and a floating pin 30; the second positioning seat 26 is internally provided with a mounting cavity 27, the mounting cavity 27 is provided with an opening 28 on the upper surface of the second positioning seat 26, the lower end of the floating pin 30 extends into the mounting cavity 27 from the opening 28, and the outer surface of the lower end of the floating pin 30 is in clearance fit with the inner wall of the mounting cavity 27; one end of the floating spring 29 is abutted against the bottom wall of the mounting cavity 27, and the other end is abutted against the lower end of the floating pin 30; the upper end of the floating pin 30 protrudes out of the mounting cavity 27, and the upper end diameter of the floating pin 30 is configured to a preset diameter. The aforementioned second placement surface is the top surface of the second positioning seat 26.

The preset diameter can be configured according to the specific bearing size, the preset diameter is slightly smaller than the diameter of the inner ring of the small bearing, and the size of the preset diameter can ensure that sliding contact is formed between the outer surface of the upper end of the floating pin 30 and the inner surface of the inner ring of the small bearing in the process that the small bearing is pressed and assembled; the floating pin 30 extends along the vertical direction, so that the outer surface of the upper end of the floating pin 30 is always in contact with the inner ring of the small bearing in the process of press-fitting the small bearing, and the floating pin 30 plays a role in guiding the movement path of the small bearing; namely, the embodiment solves the technical problem of how to guide the small bearing in the press mounting process.

Further, due to the arrangement of the floating spring 29, the floating spring 29 is compressed in the process that the second ram assembly 3 pushes the floating pin 30 to move downwards, and when the second ram assembly 3 is lifted upwards after the press-fitting is completed, the floating pin 30 is automatically lifted upwards under the action of the elastic force of the floating spring 29.

Further, how to prevent the floating pin 30 from being separated from the second positioning seat 26 is a technical problem to be solved, and the technical problem is solved by the following technical scheme.

The side surface of the floating pin 30 is formed with a limit groove 31 with a preset length, the limit groove 31 extends along the length direction of the floating pin 30, and two ends of the limit groove 31 are respectively formed with a first limit part 32 and a second limit part 33; a stopper 34 is provided on an inner wall of one side of the installation cavity 27, the stopper 34 is inserted into the stopper groove 31, and the stopper 34 is located between the first stopper portion 32 and the second stopper portion 33.

The limit groove 31 extends along the vertical direction, and the limit groove 31 is an elongated groove arranged on the side surface of the floating pin 30, which is formed by removing part of the material on the side surface of the floating pin 30; along the vertical direction, the first limiting part 32 and the second limiting part 33 are groove walls at two ends of the limiting groove 31; the side surface of the second positioning seat 26 is provided with a positioning through hole, the limiting block 34 is of a pin body structure, and one end of the limiting block 34 penetrates through the positioning through hole and is positioned in the limiting groove 31; the preset length of the limiting groove 31 may be configured according to the use condition, and is not limited herein.

The first limiting portion 32 is used to prevent the floating pin 30 from excessively moving downward when the second ram assembly 3 pushes the floating pin 30 downward; when the second ram assembly 3 is lifted upwards, the floating pin 30 is automatically lifted upwards under the action of the elastic force of the floating spring 29, and the second limiting part 33 is used for preventing the floating pin 30 from being excessively lifted upwards to be separated from the second positioning seat 26; in summary, the present embodiment solves the technical problem of how to prevent the floating pin 30 from disengaging from the second positioning seat 26.

With further reference to fig. 1, a first annular protrusion 39 is formed at the top of the first positioning seat 24, a first positioning hole is formed at the bottom of the large connecting rod head, the first positioning hole is communicated with the large hole, the radial diameter of the first annular protrusion 39 is slightly smaller than that of the first positioning hole, when the large connecting rod head is placed on the first positioning seat 24, the first positioning hole is sleeved outside the first annular protrusion 39, and the first annular protrusion 39 plays a role in radially positioning the large connecting rod head; similarly, a second annular protrusion 40 is formed on the top of the second positioning seat 26, a second positioning hole is formed on the bottom of the small end of the connecting rod, the second positioning hole is communicated with the small hole, the second annular protrusion 40 has a structure and principle similar to those of the first positioning seat 24, and the second annular protrusion 40 is used for radially positioning the small end of the connecting rod.

With further reference to fig. 1, the structure of the second ram assembly 3 may be one of those in the prior art, and the present embodiment is not particularly limited.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The bearing press-fitting tool is characterized by comprising a first press-fitting assembly and a second press-fitting assembly;

the first press fitting assembly comprises a first press head assembly (1) and a first base assembly (2) which are coaxially arranged, and the first press head assembly (1) is positioned above the first base assembly (2);

the second press-fit assembly comprises a second press-head assembly (3) and a second base assembly (4) which are coaxially arranged, and the second press-head assembly (3) is positioned above the second base assembly (4);

wherein, the first pressure head assembly (1) and the second pressure head assembly (3) move in the same direction at the same time.

2. The bearing press-fit tooling according to claim 1, wherein the first ram assembly (1) comprises a mounting portion (5), the mounting portion (5) is provided with a mounting hole (6) in a radial direction, and a blocking portion (7) is arranged in the mounting hole (6);

the first pressure head assembly (1) further comprises a ball plunger (8), and the plunger tail of the ball plunger (8) is inserted into the mounting hole (6) and is abutted to the blocking part (7); the whole or part of the plunger head of the ball plunger (8) extends out of the mounting hole (6).

3. The bearing press-fitting tool according to claim 2, wherein the first ram assembly (1) further comprises a sliding part (9), the sliding part (9) is located above the mounting part (5), the sliding part (9) is coaxially connected with the mounting part (5), and the cross-sectional diameter of the sliding part (9) is larger than the cross-sectional diameter of the mounting part (5);

the first pressure head assembly (1) further comprises a pressure head seat (10), a first opening (11) is formed in the bottom of the pressure head seat (10), and the sliding part (9) extends into the first opening (11) and is in sliding contact with the wall of the first opening (11);

the bottom of the pressure head seat (10) is also provided with at least one protruding pin (12), and the protruding pin (12) protrudes outwards from the lower surface of the pressure head seat (10) towards the direction of the first base assembly (2).

4. A bearing press-fit tooling according to any one of claims 1-3, further comprising a cross plate (13), a bottom plate (14), a number of guide posts (15) and at least one guide spring (16);

the plate surface of the transverse plate (13) is parallel to the plate surface of the bottom plate (14), the transverse plate (13) is positioned above the bottom plate (14), and a space is reserved between the transverse plate (13) and the bottom plate (14);

the extending direction of the guide posts (15) is perpendicular to the plate surface of the transverse plate (13), the transverse plate (13) is provided with a plurality of through holes (17), one end of any guide post (15) is connected with the bottom plate (14), and the other end of any guide post (15) is movably inserted into one of the through holes (17); the guide spring (16) is arranged between the bottom plate (14) and the transverse plate (13);

the first pressure head assembly (1) and the second pressure head assembly (3) are arranged on the lower surface of the transverse plate (13); the first base component (2) and the second base component (4) are arranged on the upper surface of the bottom plate (14); the first pressure head assembly (1), the second pressure head assembly (3), the first base assembly (2) and the second base assembly (4) are all located in the space.

5. A bearing press-fitting tool according to claim 3, wherein the pressure head seat (10) is internally provided with a containing cavity (18), and the containing cavity (18) is communicated with the first opening (11);

the upper end of the sliding part (9) is provided with a widening part (19), the widening part (19) is accommodated in the accommodating cavity (18), the diameter of the widening part (19) is larger than the aperture of the first opening (11), and the side wall of the widening part (19) is in clearance fit with the inner wall of the accommodating cavity (18).

6. The bearing press-fit tooling according to claim 5, wherein the first ram assembly (1) further comprises a spring assembly (20), the spring assembly (20) being disposed within the receiving cavity (18); one end of the spring assembly (20) is abutted against the top wall of the accommodating cavity (18), and the other end is abutted against the widened part (19).

7. Bearing press-fit tooling according to claim 6, characterized in that it is further provided with a blind hole (21) extending in the vertical direction, the blind hole (21) being provided in the widened portion (19) or the blind hole (21) being provided in the widened portion (19) and the sliding portion (9);

the first pressure head assembly (1) further comprises a connecting rod (22), the connecting rod (22) and the blind hole (21) are coaxially arranged, the upper end of the connecting rod (22) is connected with the top wall of the accommodating cavity (18), the lower end of the connecting rod (22) is inserted into the blind hole (21), and the lower end of the connecting rod (22) is in movable contact with the wall of the blind hole (21);

the spring assembly (20) is sleeved on the connecting rod (22).

8. Bearing press-fit tooling according to claim 2, 3, 5, 6 or 7, characterized in that a first guide part (23) is formed below the mounting part (5), the first guide part (23) being coaxial with the mounting part (5);

the first base assembly (2) comprises a first positioning seat (24), the first positioning seat (24) is provided with a first guide hole (25), and the central line of the first guide part (23) is coaxial with the hole central line of the first guide hole (25);

when the first guide part (23) is inserted into the first guide hole (25), the first guide part (23) forms clearance fit with the first guide hole (25).

9. Bearing press-fit tooling according to claim 1, characterized in that the second base assembly (4) comprises a second positioning seat (26), a floating spring (29) and a floating pin (30);

a mounting cavity (27) is formed in the second positioning seat (26), an opening (28) is formed in the upper surface of the second positioning seat (26) in the mounting cavity (27), the lower end of the floating pin (30) extends into the mounting cavity (27) from the opening (28), and the outer surface of the lower end of the floating pin (30) is in clearance fit with the inner wall of the mounting cavity (27);

one end of the floating spring (29) is abutted against the bottom wall of the mounting cavity (27), and the other end is abutted against the lower end of the floating pin (30);

the upper end of the floating pin (30) protrudes out of the mounting cavity (27), and the upper end diameter of the floating pin (30) is configured to a preset diameter.

10. The bearing press-fitting tool according to claim 9, wherein a limit groove (31) of a preset length is formed in a side surface of the floating pin (30), the limit groove (31) extends along a length direction of the floating pin (30), and a first limit portion (32) and a second limit portion (33) are formed at two ends of the limit groove (31) respectively;

a limiting block (34) is arranged on the inner wall of one side of the mounting cavity (27), the limiting block (34) is inserted into the limiting groove (31), and the limiting block (34) is located between the first limiting part (32) and the second limiting part (33).