CN214979041U

CN214979041U - Transfer type guide mechanism for press mounting of flexible flywheel nut

Info

Publication number: CN214979041U
Application number: CN202120960237.XU
Authority: CN
Inventors: 刘鹏飞
Original assignee: Magna Automotive Systems Changzhou Co ltd
Current assignee: Magna Automotive Systems Changzhou Co ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-12-03
Anticipated expiration: 2031-05-07

Abstract

The utility model discloses a transfer type guiding mechanism for flexible flywheel nut press fitting, which comprises a sliding sleeve and a mounting hole arranged on the lower surface of an upper die base, wherein the sliding sleeve is slidably sleeved outside a mandrel, the head of the mandrel penetrates out of the sliding sleeve, and two ends of a radial pin penetrating through the mandrel are respectively arranged in two axial chutes arranged on the circumferential wall of the sliding sleeve in a penetrating manner; the tail part of the mandrel and the tail part of the sliding sleeve are arranged in the mounting hole, a first spring is arranged between a radial projection on the circumferential surface of the tail part of the mandrel and the hole bottom of the mounting hole, a second spring is arranged between the end surface of the sliding sleeve and the hole bottom of the mounting hole, and the radial projection on the mandrel is in sliding fit with an axial slot on the circumferential wall of the tail part of the sliding sleeve; the head of the mandrel props against the tail of the pressing block for limiting through the radial convex block after penetrating out of the pressing block, and the head of the sliding sleeve props against the tail of the pressing block for limiting through a limiting step on the circumferential surface of the tail of the sliding sleeve after penetrating out of the pressing block; the pressing block is fixed on the lower surface of the upper die base. The utility model discloses can guarantee that the nut pressure equipment in-process can not be eccentric.

Description

Transfer type guide mechanism for press mounting of flexible flywheel nut

Technical Field

The utility model relates to a flexible flywheel nut pressure equipment, more specifically say, relate to a flexible flywheel nut pressure equipment is with dividing dynamic formula guiding mechanism.

Background

The flexible flywheel is an important part for connecting an engine and transmitting torque, wherein a nut used for connecting a hydraulic torque converter is particularly heavy, a nut press-fitting tool plays a key role in the position degree of the nut, once the position degree of the nut is out of tolerance and is not concentric with a press-fitting hole, the dynamic balance of the whole flywheel is overlarge, and finally the noise of the engine is overlarge.

The existing press fitting tool uses the outer circle of the nut for centering, the tolerance of the outer circle of the nut is not enough for realizing the accurate positioning of the nut, and an upper die does not have any centering function on the nut in the pressing process, so that the position tolerance of the nut after press fitting is out of tolerance and the nut is not concentric with a press fitting hole, therefore, a set of new mechanism needs to be designed on the basis of the existing tool for centering the nut in the press fitting process, and the problem of the out of tolerance of the press fitting position tolerance of the nut is solved.

Disclosure of Invention

1. Technical problem to be solved by the utility model

An object of the utility model is to provide a flexible flywheel nut pressure equipment is with transfer formula guiding mechanism, adopts the technical scheme of the utility model, simple structure, it is convenient to connect, centers on the screw through the dabber, centers on the pressure equipment hole through the sliding sleeve, can guarantee to remain concentric setting throughout at whole pressure equipment in-process nut and pressure equipment hole, can solve nut pressure equipment back position degree discrepancy, the eccentric problem of nut well, is applicable to batch production.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a flexible flywheel nut pressure equipment is with dividing dynamic formula guiding mechanism, including set up mounting hole and supporting mounting hole on the lower surface of upper die base set up be used for inserting the dabber in the nut, be used for inserting the sliding sleeve of pressure equipment hole on the flexible flywheel, be used for making the nut impress the briquetting in the pressure equipment hole, the sliding sleeve overlap outside the dabber with sliding from top to bottom, and the head of dabber wears out from the head of sliding sleeve, two axial spouts that set up on the sliding sleeve circumference wall are worn through respectively to the radial round pin both ends that run through on the dabber can slide from top to bottom; the tail part of the mandrel and the tail part of the sliding sleeve are both arranged in the mounting hole, a first spring is arranged between a radial projection on the circumferential surface of the tail part of the mandrel and the hole bottom of the mounting hole, a second spring positioned in the first spring is arranged between the end surface of the sliding sleeve and the hole bottom of the mounting hole, and the radial projection on the mandrel is in sliding fit with an axial slot on the circumferential wall of the tail part of the sliding sleeve; the head of the mandrel is abutted and limited with the tail of the pressing block through the radial bump after penetrating out of the pressing block, and the head of the sliding sleeve is abutted and limited with the tail of the pressing block through the limiting step on the circumferential surface of the tail of the sliding sleeve after penetrating out of the pressing block; the pressing block is fixed on the lower surface of the upper die base.

Furthermore, the head of the mandrel is sequentially provided with a first guide conical section and a guide column section from top to bottom.

Furthermore, the head of the sliding sleeve is provided with a second guiding conical section.

Furthermore, the circumference surface at the tail part of the mandrel is provided with three radial lugs which are uniformly distributed along the circumferential direction, and the circumference wall at the tail part of the sliding sleeve is provided with three axial slots which are uniformly distributed along the circumferential direction and are in up-and-down sliding fit with the radial lugs.

Furthermore, the pressing block sequentially comprises an inserting section used for being inserted into the mounting hole, a fixedly connecting section used for being fixedly connected with the lower surface of the upper die base and a pressing section used for acting on the flexible flywheel to press the nut into the press mounting hole from top to bottom.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a flexible flywheel nut pressure equipment is with transfer formula guiding mechanism, its simple structure, it is convenient to connect, centers on the screw through the dabber, centers on the pressure equipment hole through the sliding sleeve, can guarantee to keep concentric setting throughout at whole pressure equipment in-process nut and pressure equipment hole, can solve the problem of nut pressure equipment back position degree discrepancy, nut off-centre well, is applicable to batch production.

Drawings

FIG. 1 is a schematic structural view of an assembled flexible flywheel and nut;

fig. 2 is a schematic structural view of the present invention, wherein the present invention is applied to an upper die base by a differential guiding mechanism for pressing a flexible flywheel nut;

fig. 3 is a sectional view of the transfer type guiding mechanism for press fitting of the flexible flywheel nut of the present invention;

fig. 4 is a schematic structural view of a sliding sleeve in the transfer type guiding mechanism for press fitting of the flexible flywheel nut of the present invention;

fig. 5 is a schematic structural view of the central spindle of the transfer type guiding mechanism for press fitting of the flexible flywheel nut of the present invention.

The reference numerals in the schematic drawings illustrate: 1. an upper die holder; 1-1, mounting holes; 2. a mandrel; 2-1, radial bumps; 2-2, a first guiding conical section; 2-3, a guide post section; 3. a sliding sleeve; 3-1, axial sliding groove; 3-2, axial slots; 3-3, limiting steps; 3-4, a second guiding conical section; 4. briquetting; 5. a radial pin; 6. a first spring; 7. a second spring; A. a nut; B. a flexible flywheel; b-1, press mounting holes.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the differential type guiding mechanism for press-fitting of the flexible flywheel nut of the present embodiment is installed on the upper die base of the existing press-fitting tool, the press-fitting tool is the prior art, the specific structure of the press-fitting tool is not repeated here, and the differential type guiding mechanism mainly comprises a driver for controlling the upper die base to move up and down, a lower die assembly for clamping the flexible flywheel and the nut, and the clamping requirements of the flexible flywheel and the nut are as follows: a positioning nut of the support mandrel, the flexible flywheel is positioned by the central shaft, the nut is over against a press mounting hole on the flexible flywheel, and the structure of the lower die assembly is not described herein; the number of the transfer type guiding mechanisms is determined according to the number of the nuts A needing to be pressed on the flexible flywheel B, in the embodiment, three nuts A needing to be pressed on the flexible flywheel B are arranged on the corresponding upper die base 1;

the movable guiding mechanism comprises a mounting hole 1-1 formed in the lower surface of the upper die holder 1, a mandrel 2 arranged in the matching mounting hole 1-1 and used for being inserted into the nut A, a sliding sleeve 3 used for being inserted into a press-mounting hole B-1 in the flexible flywheel B, and a pressing block 4 used for enabling the nut A to be pressed into the press-mounting hole B-1, wherein in order to enable the mandrel 2 to be inserted into the nut more smoothly, a first guiding conical section 2-2 and a guiding column section 2-3 are sequentially arranged at the head of the mandrel 2 from top to bottom; in order to ensure that the sliding sleeve 3 is inserted into the press-fitting hole more smoothly, the head of the sliding sleeve 3 is provided with a second guiding conical section 3-4; the sliding sleeve 3 is sleeved outside the core shaft 2 in a vertically sliding manner, the head of the core shaft 2 penetrates out of the head of the sliding sleeve 3, and two ends of a radial pin 5 penetrating through the core shaft 2 respectively penetrate through two axial sliding grooves 3-1 formed in the circumferential wall of the sliding sleeve 3 in a vertically sliding manner; the sliding sleeve 3 and the mandrel 2 can slide up and down relatively, but the relative sliding distance is limited by the length of the axial sliding groove;

subsequently, the tail part of the mandrel 2 and the tail part of the sliding sleeve 3 are both arranged in the mounting hole 1-1, a first spring 6 is arranged between a radial lug 2-1 on the circumferential surface of the tail part of the mandrel 2 and the hole bottom of the mounting hole 1-1, a second spring 7 positioned in the first spring 6 is arranged between the end surface of the sliding sleeve 3 and the hole bottom of the mounting hole 1-1, wherein the radial lug 2-1 on the mandrel 2 is in sliding fit with an axial slot 3-2 on the circumferential wall of the tail part of the sliding sleeve 3, specifically, three radial lugs 2-1 which are uniformly distributed along the circumferential direction are arranged on the circumferential surface of the tail part of the mandrel 2 in the embodiment, and three axial slots 3-2 which are uniformly distributed along the circumferential direction and are in up-and-down sliding fit with the radial lugs 2-1 are arranged on the circumferential wall of the tail part of the sliding sleeve 3; the design of the first spring 6 and the second spring 7 and the design of the sliding fit of the radial bump 2-1 and the axial slot 3-2 enable the mandrel 2 and the sliding sleeve 3 to move independently;

continuously, the head of the mandrel 2 is propped against the tail of the pressing block 4 for limiting through the radial bump 2-1 after penetrating out of the pressing block 4, and the head of the sliding sleeve 3 is propped against the tail of the pressing block 4 for limiting through the limiting step 3-3 on the circumferential surface of the tail of the sliding sleeve 3 after penetrating out of the pressing block 4; the pressing block 4 is fixed on the lower surface of the upper die base 1, wherein the pressing block 4 sequentially comprises an inserting section used for being inserted into the mounting hole 1-1, a fixedly connecting section used for being fixedly connected with the lower surface of the upper die base 1 and a pressing section used for acting on the flexible flywheel B to press the nut A into the press mounting hole B-1 from top to bottom.

In an initial state, under the action of the first spring and the second spring, the radial bump at the tail of the mandrel abuts against the pressing block, and the limiting step at the tail of the sliding sleeve abuts against the pressing block; when press fitting and die assembly are carried out, the first stage is as follows: the upper die holder moves downwards, the head of the mandrel penetrates through the press-fitting hole in the flexible flywheel and extends into the nut, and the head of the sliding sleeve penetrates through the press-fitting hole in the flexible flywheel and then is just abutted against the nut, so that the nut and the press-fitting hole are always concentrically arranged in the whole press-fitting process; and a second stage: the upper die holder continues to move downwards, the sliding sleeve slides upwards relative to the mandrel due to the fact that the head of the sliding sleeve abuts against the nut, the second spring is compressed, and the head of the mandrel continues to move downwards until the head of the mandrel abuts against the supporting mandrel on the lower die; and a third stage: the upper die holder continues to move downwards, and the head of the sliding sleeve abuts against the nut, and the head of the mandrel abuts against the supporting mandrel, so that the sliding sleeve and the mandrel move upwards relative to the mounting hole together until the pressing block abuts against the flexible flywheel; a fourth stage: the upper die base continues to move downwards, and the pressing block applies pressure on the flexible flywheel to press the nut into the press mounting hole in the flexible flywheel. Because the nut and the press mounting hole are simultaneously guided and corrected by the separate type guide mechanism in the whole press mounting process, the nut can be ensured not to be eccentric in the press mounting process, the problems of poor position degree and nut eccentricity after the nut is press mounted can be well solved, and the press mounting method is suitable for batch production.

The utility model discloses a flexible flywheel nut pressure equipment is with transfer formula guiding mechanism, simple structure, it is convenient to connect, centers on the screw through the dabber, centers on the pressure equipment hole through the sliding sleeve, can guarantee to remain concentric setting throughout at whole pressure equipment in-process nut and pressure equipment hole, can solve the problem of nut pressure equipment back position degree out of tolerance, nut off-centre well, is applicable to batch production.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a flexible flywheel nut pressure equipment is with transfer formula guiding mechanism which characterized in that: the device comprises a mounting hole (1-1) formed in the lower surface of an upper die holder (1) and a mandrel (2) arranged in the matching mounting hole (1-1) and used for being inserted into a nut (A), a sliding sleeve (3) used for being inserted into a press-fitting hole (B-1) in a flexible flywheel (B), and a pressing block (4) used for pressing the nut (A) into the press-fitting hole (B-1), wherein the sliding sleeve (3) is sleeved outside the mandrel (2) in a vertically sliding manner, the head of the mandrel (2) penetrates out of the head of the sliding sleeve (3), and two ends of a radial pin (5) penetrating through the mandrel (2) are respectively penetrated through two axial sliding grooves (3-1) formed in the circumferential wall of the sliding sleeve (3) in a vertically sliding manner; the tail part of the mandrel (2) and the tail part of the sliding sleeve (3) are both arranged in the mounting hole (1-1), a first spring (6) is arranged between a radial bump (2-1) on the circumferential surface of the tail part of the mandrel (2) and the hole bottom of the mounting hole (1-1), a second spring (7) positioned in the first spring (6) is arranged between the end surface of the sliding sleeve (3) and the hole bottom of the mounting hole (1-1), and the radial bump (2-1) on the mandrel (2) is in sliding fit with an axial slot (3-2) on the circumferential wall of the tail part of the sliding sleeve (3); the head of the mandrel (2) is abutted against the tail of the pressing block (4) for limiting through a radial bump (2-1) after penetrating out of the pressing block (4), and the head of the sliding sleeve (3) is abutted against the tail of the pressing block (4) for limiting through a limiting step (3-3) on the circumferential surface of the tail of the sliding sleeve (3) after penetrating out of the pressing block (4); the pressing block (4) is fixed on the lower surface of the upper die holder (1).

2. The transfer type guide mechanism for press fitting of the flexible flywheel nut as claimed in claim 1, wherein: the head of the mandrel (2) is sequentially provided with a first guiding conical section (2-2) and a guiding column section (2-3) from top to bottom.

3. The transfer type guide mechanism for press fitting of the flexible flywheel nut as claimed in claim 1, wherein: the head of the sliding sleeve (3) is provided with a second guiding conical section (3-4).

4. The transfer type guide mechanism for press fitting of the flexible flywheel nut as claimed in claim 1, wherein: the tail circumferential surface of the mandrel (2) is provided with three radial lugs (2-1) which are uniformly distributed along the circumferential direction, and the tail circumferential surface of the sliding sleeve (3) is provided with three axial slots (3-2) which are uniformly distributed along the circumferential direction and are in up-and-down sliding fit with the radial lugs (2-1).

5. The transfer type guide mechanism for press fitting of the flexible flywheel nut as claimed in claim 1, wherein: the pressing block (4) sequentially comprises an inserting section used for being inserted into the mounting hole (1-1), a fixedly connecting section used for being fixedly connected with the lower surface of the upper die base (1) and a pressing section used for acting on the flexible flywheel (B) to press the nut (A) into the press mounting hole (B-1) from top to bottom.