CN116765799A

CN116765799A - Shaft pressing device

Info

Publication number: CN116765799A
Application number: CN202311075590.XA
Authority: CN
Inventors: 毕研青; 李立群; 郭盼
Original assignee: Kingclean Electric Co Ltd; Lexy Electric Green Energy Technology Suzhou Co Ltd; Suzhou Kingclean Precision Machinery Co Ltd; Jiangsu Kingclean Intelligent Appliance Co Ltd
Current assignee: Kingclean Electric Co Ltd; Lexy Electric Green Energy Technology Suzhou Co Ltd; Suzhou Kingclean Precision Machinery Co Ltd; Jiangsu Kingclean Intelligent Appliance Co Ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2023-09-19

Abstract

The shaft pressing device comprises a base, a workpiece mounting seat, a driving mechanism, a fixed supporting piece, a floating supporting piece, an elastic connecting component and a pressure sensor; the fixed supporting piece and the floating supporting piece are arranged at intervals; the elastic connecting component is respectively connected with the fixed supporting piece and the floating supporting piece; the elastic connecting component comprises a floating connecting piece and an elastic supporting piece, and the floating connecting piece elastically hangs the floating supporting piece on the fixed supporting piece through the elastic supporting piece; the pressure sensor is arranged between the fixed support piece and the floating support piece; one of the fixed supporting piece and the floating supporting piece is fixedly connected with the pressure sensor, and the other one is in contact with the pressure sensor and does not apply pressure to the pressure sensor; the driving mechanism can drive the fixed supporting piece to move towards the workpiece mounting seat, and then the pressure sensor and the floating supporting piece are driven to press the workpiece to be pressed. The shaft pressing device is simple and compact in structure, and can improve the reliability and efficiency of shaft pressing pressure detection.

Description

Shaft pressing device

Technical Field

The application relates to the technical field of spindle press fitting, in particular to a spindle press fitting device.

Background

In the assembly process of the motor, the interference fit of the rotating shaft and the rotor sleeve piece is realized through twice press fitting, the rotating shaft and the rotor sleeve piece are fixedly connected at the first press fit position through the first press fit, and the rotating shaft and the rotor sleeve piece are fixedly connected at the second press fit position through further press fitting.

In the prior art, the rotating shaft and the rotor sleeve are generally pressed by the shaft pressing device, the pressure sensor in the shaft pressing device in the prior art is directly locked and fixed between the upper connecting piece and the lower connecting piece by the fastening piece, so that the detection value of the pressure sensor reaches a pressure value of 45-60 kg before the pressing, the pressure detection conversion is needed in the pressing process, the reliability and the efficiency of the pressure detection are low, and the service life of the pressure sensor is low.

Accordingly, there is a need for an improved shaft pressing device to solve the above-mentioned problems.

Disclosure of Invention

The application provides a shaft pressing device which is simple and compact in structure and capable of improving the reliability and efficiency of shaft pressing pressure detection.

The application provides a shaft pressing device which is used for performing shaft pressing treatment on a workpiece to be pressed, wherein the workpiece to be pressed comprises a rotating shaft and a sleeved part sleeved on the rotating shaft, the rotating shaft is fixedly connected with the sleeved part through pre-pressing, and the shaft pressing device comprises a base, a workpiece mounting seat, a driving mechanism, a fixed supporting part, a floating supporting part, an elastic connecting component and a pressure sensor;

The base is used for supporting the workpiece mounting seat; the workpiece mounting seat is used for supporting the workpiece to be pressed; the driving mechanism is in transmission connection with the fixed support;

the fixed support piece and the floating support piece are arranged at intervals; the elastic connecting component is respectively connected with the fixed supporting piece and the floating supporting piece; the elastic connecting assembly comprises a floating connecting piece and an elastic supporting piece, wherein the elastic supporting piece is arranged on one side, away from the floating supporting piece, of the fixed supporting piece, and the floating connecting piece elastically hangs the floating supporting piece on the fixed supporting piece through the elastic supporting piece in a compressed state;

the pressure sensor is arranged between the fixed support and the floating support; one of the fixed support and the floating support is fixedly connected with the pressure sensor, and the other one is in contact with the pressure sensor and does not apply pressure to the pressure sensor;

the driving mechanism can drive the fixed supporting piece to move towards the workpiece mounting seat, and then the pressure sensor and the floating supporting piece are driven to press the workpiece to be pressed.

Further, the elastic supporting piece is sleeved on the floating connecting piece;

the floating connector has oppositely disposed first and second ends; the floating connecting piece is in sliding connection with the fixed supporting piece along the axial direction, and the second end of the floating connecting piece penetrates through the fixed supporting piece and is fixedly connected with the floating supporting piece;

the elastic support piece is provided with a first abutting end and a second abutting end which are oppositely arranged, the first abutting end of the elastic support piece abuts against the first end of the floating connecting piece, and the second abutting end of the elastic support piece abuts against the fixed support piece.

Further, the floating connecting piece comprises a hoisting connecting piece and a hoisting limiting piece, wherein the hoisting limiting piece is arranged on one side, far away from the fixed supporting piece, of the elastic supporting piece, and the hoisting connecting piece is connected with the hoisting limiting piece;

the elastic supporting piece is sleeved on the hoisting connecting piece; the first abutting end of the elastic supporting piece is abutted with the hoisting limiting piece;

the hoisting connecting piece is connected with the fixed supporting piece in a sliding way along the pressing shaft direction; one end of the hoisting connecting piece, which is far away from the hoisting limiting piece, is fixedly connected with the floating supporting piece;

The elastic support piece is compressed and arranged between the hoisting limiting piece and the fixed support piece, the floating connecting piece and the elastic support piece can pull the floating support piece to move towards the fixed support piece, so that the fixed support piece and the floating support piece are respectively in contact with the pressure sensor, and pressure is not applied to the pressure sensor.

Further, one end of the hoisting connecting piece far away from the floating supporting piece is a suspended free end.

Further, the pressing shaft device further comprises a pressing piece, wherein the pressing piece is fixedly arranged on one side, facing the workpiece mounting seat, of the floating support piece;

the press fitting piece is provided with a rotating shaft guide part; the rotating shaft can extend into the rotating shaft guide part, and the rotating shaft guide part is used for guiding the rotating shaft in a press-fit manner;

the shaft pressing device further comprises a press-fit guide piece and a first sleeve, wherein the press-fit guide piece is fixedly connected with the base, and the first sleeve is fixedly connected with the floating support piece;

the first sleeve is sleeved on the press-fit guide member in a sliding manner along the press shaft direction, and the press-fit guide member guides the floating support member in a moving manner through the first sleeve.

Further, the shaft pressing device further comprises a second sleeve, and the second sleeve is fixedly connected with the fixed supporting piece; the second sleeve is sleeved on the floating connecting piece in a sliding mode along the shaft pressing direction.

Further, a rotating shaft avoidance part is arranged on the workpiece mounting seat and used for accommodating the rotating shaft and guiding the rotating shaft in a press-fit manner.

The workpiece mounting seat is provided with a first limiting part, a second limiting part matched with the first limiting part is arranged at one end, facing the floating support, of the workpiece mounting seat;

when the rotating shaft is stamped along the pressing shaft direction relative to the sleeving part, the first limiting part and the second limiting part can be abutted, and the second limiting part limits the movement stroke of the sleeving part towards the workpiece mounting seat.

The workpiece mounting seat is provided with a first guide part, a second guide part matched with the first guide part is arranged at one end, facing the floating support, of the workpiece mounting seat, and the first guide part is in clearance fit with the second guide part;

The workpiece mounting seat guides the movement of the sleeved part through the first guide part and the second guide part.

Further, the clearance distance between the first guide part and the second guide part in the axial direction is a preset value, and the preset value is 0.1-0.2mm.

The shaft pressing device provided by the application has the following beneficial effects:

the shaft pressing device comprises a base, a workpiece mounting seat, a driving mechanism, a fixed supporting piece, a floating supporting piece, an elastic connecting component and a pressure sensor; the base is used for supporting the workpiece mounting seat; the workpiece mounting seat is used for supporting a workpiece to be pressed; the driving mechanism is in transmission connection with the fixed supporting piece; the fixed supporting piece and the floating supporting piece are arranged at intervals; the elastic connecting component is respectively connected with the fixed supporting piece and the floating supporting piece; the elastic connecting component comprises a floating connecting piece and an elastic supporting piece, the elastic supporting piece is arranged on one side, away from the floating supporting piece, of the fixed supporting piece, and the floating supporting piece is elastically hoisted on the fixed supporting piece through the elastic supporting piece in a compressed state; the pressure sensor is arranged between the fixed support piece and the floating support piece; one of the fixed supporting piece and the floating supporting piece is fixedly connected with the pressure sensor, the other one of the fixed supporting piece and the floating supporting piece is in contact with the pressure sensor, the pressure sensor is not applied with pressure, the driving mechanism can drive the fixed supporting piece to move towards the workpiece mounting seat, and then the pressure sensor and the floating supporting piece are driven to press the workpiece to be pressed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a shaft pressing device according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a shaft pressing device according to an embodiment of the present application;

FIG. 3 is a partial enlarged view of a portion I provided by an embodiment of the present application;

fig. 4 is a partial enlarged view at II according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a rotating shaft according to an embodiment of the present application.

The following supplementary explanation is given to the accompanying drawings:

10-pressing a shaft workpiece; 11-a rotating shaft; 111-a first press-fit shaft; 112-a second press-fit shaft; 12-sleeving parts; 20-a base; 30-a workpiece mounting seat; 31-a rotating shaft avoidance part; 32-a second limit part; 33-a second guide; 40-a driving mechanism; 50-fixing the support; 60-floating support; a 70-elastic connection assembly; 71-floating connection; 711-hoisting a connecting piece; 712-hoisting a limiting piece; 72-elastic support; 80-a pressure sensor; 90-press fitting; 91-a spindle guide; 100-press fitting the guide; 110-a first sleeve; 120-a second sleeve; 121-a first limiting part; 122-first guide.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

The following describes embodiments of the application with reference to the accompanying drawings, which do not limit the application content of the claims.

The present specification provides method operational steps as an example or a flowchart, but may include more or fewer operational steps based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution.

Referring to fig. 1-5, an embodiment of the present application provides a shaft pressing device for performing shaft pressing on a workpiece 10 to be pressed, where the workpiece 10 to be pressed includes a rotating shaft 11 and a sleeve member 12 sleeved on the rotating shaft 11, the rotating shaft 11 and the sleeve member 12 are fixedly connected by pre-pressing, and the shaft pressing device provided by the embodiment of the present application includes a base 20, a workpiece mounting seat 30, a driving mechanism 40, a fixed support member 50, a floating support member 60, an elastic connection assembly 70 and a pressure sensor 80; the base 20 is used for supporting a workpiece mounting seat 30; the workpiece mounting seat 30 is used for supporting the workpiece 10 to be pressed; the driving mechanism 40 is in transmission connection with the fixed support 50; the fixed support 50 is spaced apart from the floating support 60; the elastic connection assembly 70 is connected with the fixed support 50 and the floating support 60, respectively; the elastic connection assembly 70 comprises a floating connection piece 71 and an elastic support piece 72 arranged on one side of the fixed support piece 50 away from the floating support piece 60, wherein the floating connection piece 71 elastically hangs the floating support piece 60 on the fixed support piece 50 through the elastic support piece 72 in a compressed state; the pressure sensor 80 is disposed between the fixed support 50 and the floating support 60; one of the fixed support 50 and the floating support 60 is fixedly connected with the pressure sensor 80, and the other is disposed in contact with the pressure sensor 80 without applying pressure to the pressure sensor 80; the driving mechanism 40 can drive the fixed support 50 to move towards the workpiece mounting seat 30, so as to drive the pressure sensor 80 and the floating support 60 to press the workpiece 10 to be pressed.

Specifically, the workpiece 10 to be pressed comprises a rotating shaft 11 and a sleeving piece 12 which are fixedly connected, and the rotating shaft 11 and the sleeving piece 12 are in interference fit; through pre-pressing, the sleeving part 12 is fixedly connected with the rotating shaft 11 at the first pressing position. Referring to fig. 5, the rotary shaft 11 has four sections along its axis, and is defined as a first press-fit shaft 111 and a second press-fit shaft 112, with reference to two sections of shafts located in the middle. The diameter of the first pressing shaft 111 is slightly smaller than that of the second pressing shaft 112, an inclined transition section is arranged between the first pressing shaft 111 and the second pressing shaft 112, and part of the transition section has a diameter larger than that of the sleeve member 12, and the first pressing position is arranged on the transition section.

It is noted that the length of the transition section along the axial direction is slightly larger than the acting part of the sleeving part 12, so that the sleeving part 12 can be ensured to be fixedly connected with the rotating shaft 11 after being pre-pressed; the main purpose is in the further pressure equipment in-process of follow-up, can cross the changeover portion fast, can reduce the wearing and tearing to cover and establish piece 12 on the one hand, on the other hand guarantees in the punching press in-process that cover establishes piece 12 and second pressfitting axle 112's relative effect portion is basically the same, until being stamped to the second pressfitting position, can avoid the dislocation phenomenon such as rotatory, the slope of position to appear basically.

Specifically, the shaft pressing device provided by the embodiment of the application is used for realizing further press fitting of the sleeve member 12 and the rotating shaft 11, so that the sleeve member 12 and the rotating shaft 11 are fixedly connected at the second press fit position. It should be noted that the diameter of the second pressing shaft 112 is slightly larger than the diameter of the sleeve member 12, and the second pressing position is disposed on the second pressing shaft 112, preferably, the second pressing position is located at a middle position of the second pressing shaft 112.

Further, the workpiece mounting base 30 is fixedly connected with the base 20.

Further, the driving mechanism 40 is fixedly connected with the base 20.

Further, the floating support 60 is elastically hung on the fixed support 50 by the elastic connection assembly 70.

In some embodiments, the fixed supporting member 50 is disposed above the floating supporting member 60, the elastic supporting member 72 is disposed above the fixed supporting member 50, that is, the elastic supporting member 72, the fixed supporting member 50 and the floating supporting member 60 are sequentially disposed from top to bottom along the axial direction, so that the structure of the axial pressing device is simple and compact, the installation space caused by the elastic supporting member 72 being disposed between the fixed supporting member 50 and the floating supporting member 60 is avoided from being too large, and the problems of long press-fitting stroke and large press-fitting error caused by the too large installation space are avoided.

Further, the floating link 71 is connected to the elastic support 72, the fixed support 50 and the floating support 60, respectively; the floating support 60 is elastically hung on the fixed support 50 by the floating link 71 and the elastic support 72.

Specifically, the elastic support 72 is in a compressed state when the floating link 71 and the elastic support 72 elastically hoist the floating support 60.

It should be noted that the number of the elastic connection assemblies 70 is determined according to the practical situation, and the number of the elastic connection assemblies 70 is not limited in the present application.

Preferably, the shaft pressing device comprises two sets of elastic connection assemblies 70; specifically, the two sets of elastic connection assemblies 70 are symmetrically disposed.

Further, the fixed support 50 and the floating support 60 are disposed at intervals along the axial direction; a receiving space for receiving the pressure sensor 80 is formed between the fixed support 50 and the floating support 60, and the pressure sensor 80 is received in the receiving space.

In some embodiments, the pressure sensor 80 is fixedly connected with the floating support 60, the pressure sensor 80 is in contact with the fixed support 50, and the fixed support 50 does not apply pressure to the pressure sensor 80 due to the elastic hoisting of the elastic connection assembly 70, before the pressing shaft device presses the workpiece 10 to be pressed, the pressure value of the pressure sensor 80 is smaller than or equal to a preset pressure value, and the pressing shaft device can directly detect and acquire the pressing shaft pressure without performing pressure detection conversion, so that the reliability and efficiency of the pressure detection of the pressing shaft can be improved, the reliability and efficiency of the pressing of the rotating shaft and the sleeved parts can be improved, and the service life of the pressure sensor can be prolonged.

In other embodiments, the pressure sensor 80 is fixedly connected to the fixed support 50, the pressure sensor 80 is in contact with the floating support 60, and the floating support 60 does not apply pressure to the pressure sensor 80 due to the elastic hoisting of the elastic connection assembly 70, and before the pressing shaft device presses the workpiece 10 to be pressed, the pressure value of the pressure sensor 80 is less than or equal to a preset pressure value.

It will be appreciated that the predetermined pressure value may be 0 or a negligible value greater than 0 compared to the maximum spindle pressure.

It can be understood that the driving mechanism 40 drives the fixed supporting member 50 to move towards the workpiece mounting seat 30, and further drives the pressure sensor 80 and the floating supporting member 60 to move towards the workpiece mounting seat 30, so as to press the workpiece 10 to be pressed, and further press-fitting the sleeve member 12 and the rotating shaft 11 is achieved, so that the sleeve member 12 and the rotating shaft 11 are fixedly connected at the second pressing position; during this time, the pressure value of the pressing shaft detected by the pressure sensor 80 may be used as the pressure value actually received by the rotating shaft 11.

Further, the driving mechanism 40 may be a servo cylinder, which has a large pressing force, and can ensure that the pressing positions are consistent each time.

Further, the shaft pressing device further comprises a controller, and the controller is electrically connected with the pressure sensor 80 to monitor the shaft pressing pressure value of the pressure sensor 80 in real time, and if the shaft pressing pressure value is greater than the preset upper pressure limit or less than the preset lower pressure limit, the shaft workpiece 10 to be pressed is judged to be a defective product.

In the embodiment of the application, the elastic supporting piece 72 is sleeved on the floating connecting piece 71; the floating link 71 has oppositely disposed first and second ends; the floating connecting piece 71 is slidably connected with the fixed supporting piece 50 along the axial direction, and the second end of the floating connecting piece 71 penetrates through the fixed supporting piece 50 and is fixedly connected with the floating supporting piece 60; the elastic support 72 has a first abutting end and a second abutting end which are oppositely disposed, the first abutting end of the elastic support 72 abuts against the first end of the floating connection 71, and the second abutting end of the elastic support 72 abuts against the fixed support 50. In this way, a reliable connection between the floating connection 71, the elastic support 72, the fixed support 50 and the floating support 60 is achieved, and thus a reliable elastic lifting of the floating support 60 by the floating connection 71 and the elastic support 72 is achieved.

Further, the first end and the second end are respectively disposed at two sides of the fixed support 50 along the axial direction, and the first end is disposed at one side of the fixed support 50 far away from the floating support 60.

Further, the fixing support 50 is provided with a connector passing hole, and the second end of the floating connector 71 is fixedly connected to the floating support 60 after passing through the fixing support 50 from the connector passing hole.

In particular, the resilient support 72 may be a spring.

In the embodiment of the application, the floating connecting piece 71 comprises a hoisting connecting piece 711 and a hoisting limiting piece 712, wherein the hoisting limiting piece 712 is arranged on one side of the elastic supporting piece 72 far away from the fixed supporting piece 50, and the hoisting connecting piece 711 is connected with the hoisting limiting piece 712; the elastic supporting piece 72 is sleeved on the hoisting connecting piece 711; the first abutting end of the elastic supporting piece 72 abuts against the hoisting limiting piece 712; the hoisting connecting piece 711 is slidingly connected with the fixed supporting piece 50 along the axial direction; one end of the lifting connecting piece 711, which is far away from the lifting limiting piece 712, is fixedly connected with the floating supporting piece 60; the elastic support 72 is compressively disposed between the hanging limiter 712 and the fixed support 50, and the floating connector 71 and the elastic support 72 can pull the floating support 60 to move toward the fixed support 50, so that the fixed support 50 and the floating support 60 are disposed in contact with the pressure sensor 80, respectively, without applying pressure to the pressure sensor 80. Analytically, the elastic support 72 is in a compressed state, and a restoring force acts upward and downward along the axial direction of the hoist link 711, respectively; the downward restoring force acts on the fixed support 50, and the fixed support 50 is connected with the driving mechanism 40, so that the position of the fixed support 50 is not changed; an upward restoring force acts on the hanging limiter 712, the hanging limiter 712 is locked to the hanging connector 711, and the hanging connector 711 is connected to the floating support 60, so that the upward restoring force can pull the floating support 60 to move toward the fixed support 50. By changing the spring constant of the spring itself, adjusting the compression amount of the spring, and the like, the fixed support 50 and the floating support 60 can be provided in contact with the pressure sensor 80, respectively, without applying pressure to the pressure sensor 80.

Further, the relative positions of the lifting limiting piece 712 and the lifting connecting piece 711 along the pressing axis direction are adjustable, so that the distance between the fixed support piece 50 and the floating support piece 60 along the pressing axis direction is adjustable, and further, the pressure applied to the pressure sensor 80 by the fixed support piece 50 and the floating support piece 60 is not exerted.

For example, if the pressure value of the pressure sensor 80 is large before the pressing device presses the workpiece 10 to be pressed, the position of the lifting limiter 712 relative to the lifting connector 711 is adjusted so that the distance between the fixed support 50 and the floating support 60 is increased until the pressure value of the pressure sensor 80 is less than or equal to the preset pressure value.

Specifically, the lifting limiting member 712 is detachably connected with the lifting connecting member 711 along the axial direction, so that the relative position of the lifting limiting member 712 and the lifting connecting member 711 along the axial direction is convenient to adjust, and the spacing distance between the fixed supporting member 50 and the floating supporting member 60 along the axial direction is convenient to adjust.

Preferably, the lifting limiting piece 712 is in threaded connection with the lifting connecting piece 711; specifically, the lifting limiter 712 may be a limiting nut, and the lifting connector 711 may be a lifting screw.

For example, if the pressure value of the pressure sensor 80 is large before the press-fitting of the shaft pressing device to the shaft workpiece 10 to be pressed, the limit nut is rotated so that the limit nut is away from the fixed support 50, and at this time, the distance between the fixed support 50 and the floating support 60 becomes large.

Specifically, the elastic support 72 is located between the hoisting limiter 712 and the fixed support 50 in a compressed state, the first abutting end of the elastic support 72 abuts against the hoisting limiter 712, and the second abutting end of the elastic support 72 abuts against the fixed support 50.

Specifically, one end of the hanging connection member 711, which is far from the hanging limiting member 712, is fixedly connected with the floating support 60 after passing through the fixing support 50 from the connection member passing hole.

Specifically, the hanging connection member 711 is slidably connected to the fixed support 50 in the pressing shaft direction through the connection member passing hole.

In the embodiment of the present application, the end of the hoist link 711 remote from the floating support 60 is a suspended free end. Thus, the convenience of assembling the shaft pressing device can be improved, and the convenience of adjusting the hoisting limiting member 712 and the hoisting connecting member 711 can be improved.

In the embodiment of the present application, the pressing shaft device further includes a pressing member 90, where the pressing member 90 is fixedly disposed on a side of the floating support 60 facing the workpiece mounting seat 30; the press-fitting member 90 is provided with a rotation shaft guide 91; the rotating shaft 11 can extend into the rotating shaft guiding portion 91, and the rotating shaft guiding portion 91 is used for guiding the rotating shaft 11 in a press-fitting manner.

Further, the spindle guide 91 is adapted to the spindle 11; the longitudinal direction of the rotation shaft guide 91 coincides with the pressing shaft direction.

Specifically, the shaft guide 91 may be a shaft guide hole disposed along the pressing shaft direction.

Specifically, in the pressing movement process of the press-fitting member 90 toward the workpiece mounting seat 30, the rotating shaft 11 can extend into the rotating shaft guiding portion 91 from bottom to top, and the rotating shaft guiding portion 91 can perform press-fitting guiding on the rotating shaft 11, so as to improve the press-fitting precision of the rotating shaft 11 and the sleeve-fitting member 12.

In the embodiment of the present application, the shaft pressing device further includes a press-fitting guide member 100 and a first sleeve 110, wherein the press-fitting guide member 100 is fixedly connected with the base 20, and the first sleeve 110 is fixedly connected with the floating support member 60; the first sleeve 110 is slidably sleeved on the press-fit guiding member 100 along the press-axis direction, and the press-fit guiding member 100 guides the movement of the floating supporting member 60 through the first sleeve 110.

Further, the length direction of the press-fit guide 100 coincides with the press axis direction.

Further, the first sleeve 110 is disposed between the floating support 60 and the press-fit guide 100; the press-fitting guide piece 100 is slidably connected with the first sleeve 110 along the press shaft direction, the floating support piece 60 is slidably connected with the press-fitting guide piece 100 along the press shaft direction through the first sleeve 110, and then the press-fitting guide piece 100 is used for guiding the movement of the floating support piece 60 along the press shaft direction, and further the press-fitting precision of the press shaft device on a workpiece to be pressed is improved.

It should be noted that the number of the press-fit guides 100 and the first sleeves 110 is not limited according to the actual situation, and the number of the press-fit guides 100 and the first sleeves 110 is not limited in the present application.

Preferably, the shaft pressing device further comprises two press-fitting guides 100 and two first sleeves 110, and the press-fitting guides 100 and the first sleeves 110 are arranged in a one-to-one correspondence.

In the embodiment of the present application, the shaft pressing device further includes a second sleeve 120, where the second sleeve 120 is fixedly connected with the fixed support 50; the second sleeve 120 is slidably sleeved on the floating connection member 71 along the press-fitting direction.

Further, the second sleeve 120 is disposed between the fixed support 50 and the hoist link 711; the second sleeve 120 is slidably connected with the hoisting connecting piece 711 along the pressing axis direction, and the fixed supporting piece 50 is slidably connected with the hoisting connecting piece 711 along the pressing axis direction through the second sleeve 120, so that the hoisting connecting piece 711 is guided along the movement of the pressing axis direction, the fixed supporting piece 50 and the floating supporting piece 60 are guaranteed to be relatively parallel, and the fixed supporting piece 50 and the floating supporting piece 60 do not apply pressure to the pressure sensor 80.

The number of the second sleeves 120 is identical to the number of the hanging connectors 711.

Preferably, the shaft pressing device comprises two second sleeves 120 and two hoisting connecting pieces 711, and the second sleeves 120 and the hoisting connecting pieces 71 are arranged in a one-to-one correspondence.

In the embodiment of the present application, the workpiece mounting seat 30 is provided with a rotation shaft avoidance portion 31, and the rotation shaft avoidance portion 31 is used for accommodating the rotation shaft 11 and performing press-fitting guiding on the rotation shaft 11.

Further, the rotation shaft position avoiding part 31 is matched with the rotation shaft 11; the longitudinal direction of the rotation shaft avoiding portion 31 coincides with the pressing shaft direction.

Specifically, the rotation shaft avoidance portion 31 may be a rotation shaft avoidance hole arranged along the pressing shaft direction.

Specifically, during the pressing movement of the press-fitting member 90 toward the workpiece mounting seat 30, the rotating shaft 11 can extend into the rotating shaft avoidance portion 31 from top to bottom, and the rotating shaft avoidance portion 31 can perform press-fitting guiding on the rotating shaft 11, so as to improve the press-fitting precision of the rotating shaft 11 and the sleeve-fitting member 12.

In the embodiment of the application, the sleeving part 12 is provided with a first limiting part 121, the first limiting part 121 is made of a hard metal material, and one end of the workpiece mounting seat 30 facing the floating support 60 is provided with a second limiting part 32 matched with the first limiting part 121; when the rotating shaft 11 is pressed against the sleeve 12 in the axial direction, the first limiting portion 121 and the second limiting portion 32 can abut against each other, and the second limiting portion 32 limits the movement stroke of the sleeve 12 toward the workpiece mounting seat 30.

Specifically, the first limiting portion 121 may be a limiting recess, and correspondingly, the second limiting portion 32 may be a limiting protrusion.

In some embodiments, in the process of pressing the rotating shaft 11 along the pressing axis direction, the rotating shaft 11 drives the sleeve member 12 to move downward along the pressing axis direction until the first limiting portion 121 abuts against the second limiting portion 32, after that, due to the abutting and limiting of the second limiting portion 32 and the first limiting portion 121, the movement stroke of the sleeve member 12 is limited, the sleeve member 12 is supported on the second limiting portion 32, and the rotating shaft 11 is continuously pressed down relative to the sleeve member 12 until the sleeve member 12 is fixedly connected with the rotating shaft 11 at the second pressing position.

In the embodiment of the application, the second limiting part 32 is abutted against the first limiting part 121 made of hard metal material, so that the stress intensity is high, the requirement of the stamping process can be met, the reliable limiting and supporting of the sleeve member 12 can be realized, and the compression damage of the sleeve member 12 can be prevented.

In the embodiment of the application, the sleeving part 12 is provided with a first guide part 122, the first guide part 122 is made of plastic material, one end of the workpiece mounting seat 30 facing the floating support 60 is provided with a second guide part 33 matched with the first guide part 122, and the first guide part 122 is in clearance fit with the second guide part 33; the workpiece mount 30 guides the movement of the sheathing member 12 by the first guide portion 122 and the second guide portion 33.

Specifically, the first guiding portion 122 may be a guiding protrusion, and correspondingly, the second limiting portion 32 may be a guiding recess.

In some embodiments, in the process of pressing the rotating shaft 11 along the pressing axis direction, the rotating shaft 11 drives the sleeve member 12 to move downwards along the pressing axis direction, the first guiding portion 122 can extend into the second guiding portion 33, and a clearance fit manner is adopted between the first guiding portion and the second guiding portion, so that the second guiding portion 33 guides the movement of the sleeve member 12 through the first guiding portion 122, thereby improving the press-fitting precision of the rotating shaft 11 and the sleeve member 12.

In the embodiment of the present application, the gap distance between the first guiding portion 122 and the second guiding portion 33 in the axial direction is a preset value, and the preset value is 0.1-0.2mm.

Further, when the first stopper 121 moves to come into contact with the second stopper 32, the gap distance between the first guide 122 and the second guide 33 in the axial direction is a predetermined value, and thus the first guide 122 can be prevented from being damaged by compression.

The following describes a press-fitting process of the press-shaft device provided by the embodiment of the application in combination with a specific application scene, at least including:

1. adjusting the hoisting limiting piece 712: the relative positions of the hoisting limiting piece 712 and the hoisting connecting piece 711 along the pressing axis direction are adjusted, so that the interval distance between the fixed support piece 50 and the floating support piece 60 along the pressing axis direction is adjusted, and the fixed support piece 50 and the floating support piece 60 do not apply pressure to the pressure sensor 80;

2. Feeding the workpiece 10 to be pressed: the workpiece 10 to be pressed is fed onto the workpiece mounting seat 30, the lower end of the rotating shaft 11 stretches into the rotating shaft avoiding part 31, the first limiting part 121 corresponds to the second limiting part 32, and the first guiding part 122 corresponds to the second guiding part 33;

3. pressing shaft: the driving mechanism 40 drives the fixed supporting piece 50 to move towards the workpiece mounting seat 30, and then drives the pressure sensor 80, the floating supporting piece 60 and the press fitting piece 90 to move towards the workpiece mounting seat 30, and then drives the workpiece 10 to be pressed to move downwards along the pressing shaft direction until the first limiting part 121 is abutted against the second limiting part 32, and then the rotating shaft 11 is continuously pressed downwards relative to the sleeving piece 12 until the sleeving piece 12 is fixedly connected with the rotating shaft 11 at the second pressing position; during this time, the rotation shaft 11 can be extended into the rotation shaft guide 91 from bottom to top, and the first guide 122 can be extended into the second guide 33.

The following describes specific embodiments of the present application based on the above technical solutions.

Example 1

Referring to fig. 1-5, a first embodiment provides a shaft pressing device for performing shaft pressing on a workpiece 10 to be pressed, wherein the workpiece 10 to be pressed includes a rotating shaft 11 and a sleeve member 12 sleeved on the rotating shaft 11, the rotating shaft 11 and the sleeve member 12 are fixedly connected through pre-pressing, and the first embodiment provides a shaft pressing device including a base 20, a workpiece mounting seat 30, a driving mechanism 40, a fixed support member 50, a floating support member 60, an elastic connection assembly 70 and a pressure sensor 80; the base 20 is used for supporting a workpiece mounting seat 30; the workpiece mounting seat 30 is used for supporting the workpiece 10 to be pressed; the driving mechanism 40 is in transmission connection with the fixed support 50; the fixed support 50 is spaced apart from the floating support 60; the elastic connection assembly 70 is connected with the fixed support 50 and the floating support 60, respectively; the elastic connection assembly 70 comprises a floating connection piece 71 and an elastic support piece 72 arranged on one side of the fixed support piece 50 away from the floating support piece 60, wherein the floating connection piece 71 elastically hangs the floating support piece 60 on the fixed support piece 50 through the elastic support piece 72 in a compressed state; the pressure sensor 80 is disposed between the fixed support 50 and the floating support 60; one of the fixed support 50 and the floating support 60 is fixedly connected with the pressure sensor 80, and the other is disposed in contact with the pressure sensor 80 without applying pressure to the pressure sensor 80; the driving mechanism 40 can drive the fixed support 50 to move towards the workpiece mounting seat 30, so as to drive the pressure sensor 80 and the floating support 60 to press the workpiece 10 to be pressed.

The workpiece mount 30 is fixedly connected to the base 20.

The drive mechanism 40 is fixedly connected with the base 20.

The floating support 60 is elastically hung on the fixed support 50 by an elastic connection assembly 70.

The fixed supporting member 50 is disposed above the floating supporting member 60, and the elastic supporting member 72 is disposed above the fixed supporting member 50, i.e., the elastic supporting member 72, the fixed supporting member 50 and the floating supporting member 60 are sequentially disposed from top to bottom along the axial direction.

The floating link 71 is connected to the elastic support 72, the fixed support 50 and the floating support 60, respectively; the floating support 60 is elastically hung on the fixed support 50 by the floating link 71 and the elastic support 72.

The elastic support 72 is in a compressed state when the floating link 71 and the elastic support 72 elastically hoist the floating support 60.

The shaft pressing device comprises two groups of elastic connecting assemblies 70, and the two groups of elastic connecting assemblies 70 are symmetrically arranged.

The fixed support 50 and the floating support 60 are arranged at intervals along the axial direction; a receiving space for receiving the pressure sensor 80 is formed between the fixed support 50 and the floating support 60, and the pressure sensor 80 is received in the receiving space.

The pressure sensor 80 is fixedly connected with the floating support 60, the pressure sensor 80 is in contact with the fixed support 50, the pressure sensor 80 is not applied with pressure by the fixed support 50 due to elastic hoisting of the elastic connecting assembly 70, and the pressure value of the pressure sensor 80 is smaller than or equal to a preset pressure value before the pressing shaft device presses the workpiece 10 to be pressed.

The elastic supporting piece 72 is sleeved on the floating connecting piece 71; the floating link 71 has oppositely disposed first and second ends; the floating connecting piece 71 is slidably connected with the fixed supporting piece 50 along the axial direction, and the second end of the floating connecting piece 71 penetrates through the fixed supporting piece 50 and is fixedly connected with the floating supporting piece 60; the elastic support 72 has a first abutting end and a second abutting end which are oppositely disposed, the first abutting end of the elastic support 72 abuts against the first end of the floating connection 71, and the second abutting end of the elastic support 72 abuts against the fixed support 50.

The first end and the second end are respectively disposed at two sides of the fixed support 50 along the axial direction, and the first end is disposed at one side of the fixed support 50 far away from the floating support 60.

The fixing support 50 is provided with a connector passing hole, and the second end of the floating connector 71 is fixedly coupled to the floating support 60 after passing through the fixing support 50 from the connector passing hole.

The resilient support 72 may be a spring.

The floating connecting piece 71 comprises a hoisting connecting piece 711 and a hoisting limiting piece 712, the hoisting limiting piece 712 is arranged on one side of the elastic supporting piece 72 far away from the fixed supporting piece 50, and the hoisting connecting piece 711 is connected with the hoisting limiting piece 712; the elastic supporting piece 72 is sleeved on the hoisting connecting piece 711; the first abutting end of the elastic supporting piece 72 abuts against the hoisting limiting piece 712; the hoisting connecting piece 711 is slidingly connected with the fixed supporting piece 50 along the axial direction; one end of the lifting connecting piece 711, which is far away from the lifting limiting piece 712, is fixedly connected with the floating supporting piece 60; the elastic support 72 is compressively disposed between the hanging limiter 712 and the fixed support 50.

The relative positions of the hoisting limiting piece 712 and the hoisting connecting piece 711 along the pressing axis direction are adjustable, so that the interval distance between the fixed support piece 50 and the floating support piece 60 along the pressing axis direction is adjustable, and further, the fixed support piece 50 and the floating support piece 60 do not apply pressure to the pressure sensor 80.

The hoisting limiting piece 712 is in threaded connection with the hoisting connecting piece 711; the lifting limiter 712 may be a limiting nut, and the lifting connector 711 may be a lifting screw.

The end of the hoist link 711 remote from the floating support 60 is the free end of the suspension.

The pressing shaft device further comprises a pressing piece 90, wherein the pressing piece 90 is fixedly arranged on one side of the floating support 60, which faces the workpiece mounting seat 30; the press-fitting member 90 is provided with a rotation shaft guide 91; the rotating shaft 11 can extend into the rotating shaft guiding portion 91, and the rotating shaft guiding portion 91 is used for guiding the rotating shaft 11 in a press-fitting manner.

The rotation shaft guide 91 may be a rotation shaft guide hole arranged along the pressing shaft direction.

The shaft device further comprises two press-fit guide members 100 and two first sleeves 110, wherein the press-fit guide members 100 and the first sleeves 110 are arranged in a one-to-one correspondence; the press-fit guide 100 is fixedly connected with the base 20, and the first sleeve 110 is fixedly connected with the floating support 60; the first sleeve 110 is slidably sleeved on the press-fit guiding member 100 along the press-axis direction, and the press-fit guiding member 100 guides the movement of the floating supporting member 60 through the first sleeve 110.

The first sleeve 110 is disposed between the floating support 60 and the press-fit guide 100; the press-fit guide 100 is slidably coupled to the first sleeve 110 in the press-shaft direction, and the floating support 60 is slidably coupled to the press-fit guide 100 through the first sleeve 110 in the press-shaft direction.

The shaft pressing device further comprises two second sleeves 120, and the second sleeves 120 are fixedly connected with the fixed supporting piece 50; the second sleeve 120 is slidably sleeved on the floating connection member 71 along the press-fitting direction.

Further, the second sleeve 120 is disposed between the fixed support 50 and the hoist link 711; the second sleeve 120 is slidably connected to the hoist link 711 in the axial direction, and the fixed support 50 is slidably connected to the hoist link 711 in the axial direction through the second sleeve 120.

The workpiece mounting seat 30 is provided with a rotating shaft avoiding part 31, and the rotating shaft avoiding part 31 is used for accommodating the rotating shaft 11 and guiding the rotating shaft 11 in a press-fitting manner.

The sleeving piece 12 is provided with a first limiting part 121, the first limiting part 121 is made of a hard metal material, and one end of the workpiece mounting seat 30, which faces the floating support 60, is provided with a second limiting part 32 matched with the first limiting part 121; when the rotating shaft 11 is pressed against the sleeve 12 in the axial direction, the first limiting portion 121 and the second limiting portion 32 can abut against each other, and the second limiting portion 32 limits the movement stroke of the sleeve 12 toward the workpiece mounting seat 30.

The sleeving piece 12 is provided with a first guide part 122, the first guide part 122 is made of plastic materials, one end of the workpiece mounting seat 30 facing the floating support 60 is provided with a second guide part 33 matched with the first guide part 122, and the first guide part 122 is in clearance fit with the second guide part 33; the workpiece mount 30 guides the movement of the sheathing member 12 by the first guide portion 122 and the second guide portion 33.

The gap distance between the first guide portion 122 and the second guide portion 33 in the axial direction is a preset value, and the preset value is 0.1-0.2mm.

Example two

The difference between the second embodiment and the first embodiment is that the connection arrangement of the pressure sensor 80 is the same as that of the first embodiment, and the details thereof will not be repeated here, and the differences between the second embodiment and the first embodiment will now be described as follows:

The pressure sensor 80 is fixedly connected with the fixed support 50, the pressure sensor 80 is in contact with the floating support 60, the floating support 60 does not apply pressure to the pressure sensor 80 due to the elastic hoisting of the elastic connecting assembly 70, and the pressure value of the pressure sensor 80 is smaller than or equal to a preset pressure value before the press shaft device presses the workpiece 10 to be pressed.

The foregoing is only illustrative of the present application and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present application.

Claims

1. The shaft pressing device is used for performing shaft pressing on a shaft workpiece (10) to be pressed, the shaft workpiece (10) to be pressed comprises a rotating shaft (11) and a sleeve part (12) sleeved on the rotating shaft (11), and the rotating shaft (11) and the sleeve part (12) are fixedly connected through pre-pressing, and is characterized by comprising a base (20), a workpiece mounting seat (30), a driving mechanism (40), a fixed supporting part (50), a floating supporting part (60), an elastic connecting component (70) and a pressure sensor (80);

the base (20) is used for supporting the workpiece mounting seat (30); the workpiece mounting seat (30) is used for supporting the workpiece (10) to be pressed; the driving mechanism (40) is in transmission connection with the fixed support (50);

the fixed support (50) is arranged at intervals from the floating support (60); the elastic connection assembly (70) is respectively connected with the fixed support (50) and the floating support (60); the elastic connecting assembly (70) comprises a floating connecting piece (71) and an elastic supporting piece (72) arranged on one side, away from the floating supporting piece (60), of the fixed supporting piece (50), wherein the floating connecting piece (71) elastically hangs the floating supporting piece (60) on the fixed supporting piece (50) through the elastic supporting piece (72) in a compressed state;

The pressure sensor (80) is arranged between the fixed support (50) and the floating support (60); one of the fixed support (50) and the floating support (60) is fixedly connected with the pressure sensor (80), and the other is in contact with the pressure sensor (80) and does not apply pressure to the pressure sensor (80);

the driving mechanism (40) can drive the fixed supporting piece (50) to move towards the workpiece mounting seat (30), and then the pressure sensor (80) and the floating supporting piece (60) are driven to press the shaft workpiece (10) to be pressed.

2. The shaft pressing device according to claim 1, characterized in that the elastic support (72) is sleeved on the floating connection piece (71);

the floating connection (71) has oppositely disposed first and second ends; the floating connecting piece (71) is in sliding connection with the fixed supporting piece (50) along the axial pressing direction, and the second end of the floating connecting piece (71) penetrates through the fixed supporting piece (50) and is fixedly connected with the floating supporting piece (60);

the elastic support piece (72) is provided with a first abutting end and a second abutting end which are oppositely arranged, the first abutting end of the elastic support piece (72) abuts against the first end of the floating connecting piece (71), and the second abutting end of the elastic support piece (72) abuts against the fixed support piece (50).

3. The shaft pressing device according to claim 2, characterized in that the floating connection (71) comprises a hoisting connection (711) and a hoisting limiter (712), the hoisting limiter (712) being arranged at a side of the elastic support (72) remote from the fixed support (50), the hoisting connection (711) being connected with the hoisting limiter (712);

the elastic supporting piece (72) is sleeved on the hoisting connecting piece (711); the first abutting end of the elastic supporting piece (72) is abutted with the hoisting limiting piece (712);

the hoisting connecting piece (711) is connected with the fixed supporting piece (50) in a sliding way along the pressing shaft direction; one end of the hoisting connecting piece (711) far away from the hoisting limiting piece (712) is fixedly connected with the floating supporting piece (60);

the elastic support (72) is arranged between the hoisting limiting piece (712) and the fixed support (50) in a compressed mode, the floating connecting piece (71) and the elastic support (72) can pull the floating support (60) to move towards the fixed support (50), so that the fixed support (50) and the floating support (60) are respectively in contact with the pressure sensor (80), and pressure is not applied to the pressure sensor (80).

4. A press shaft device according to claim 3, characterized in that the end of the hoisting connection (711) remote from the floating support (60) is the free end of the suspension.

5. The press spindle device according to claim 1, further comprising a press-fitting member (90), the press-fitting member (90) being fixedly provided to a side of the floating support (60) facing the workpiece mount (30);

a rotating shaft guide part (91) is arranged on the press fitting piece (90); the rotating shaft (11) can extend into the rotating shaft guide part (91), and the rotating shaft guide part (91) is used for guiding the rotating shaft (11) in a press-fit manner;

the shaft pressing device further comprises a press-fit guide piece (100) and a first sleeve (110), wherein the press-fit guide piece (100) is fixedly connected with the base (20), and the first sleeve (110) is fixedly connected with the floating support piece (60);

the first sleeve (110) is sleeved on the press-fit guide (100) in a sliding mode along the press shaft direction, and the press-fit guide (100) guides the floating support (60) in a moving mode through the first sleeve (110).

6. The shaft pressing device according to claim 1, further comprising a second sleeve (120), the second sleeve (120) being fixedly connected with the fixed support (50); the second sleeve (120) is sleeved on the floating connecting piece (71) in a sliding mode along the axial pressing direction.

7. The press spindle device according to any one of claims 1 to 6, characterized in that a spindle clearance portion (31) is provided on the workpiece mounting base (30), the spindle clearance portion (31) being for accommodating the spindle (11) and press-fitting guiding the spindle (11).

8. The shaft pressing device according to any one of claims 1 to 6, wherein a first limiting portion (121) is provided on the sleeve member (12), the first limiting portion (121) is made of a hard metal material, and the workpiece mounting seat (30) is provided with a second limiting portion (32) matched with the first limiting portion (121) at one end facing the floating support (60);

when the rotating shaft (11) is stamped along the pressing shaft direction relative to the sleeving part (12), the first limiting part (121) can be abutted with the second limiting part (32), and the second limiting part (32) limits the movement stroke of the sleeving part (12) towards the workpiece mounting seat (30).

9. The press shaft device according to any one of claims 1 to 6, wherein a first guide portion (122) is provided on the sleeve member (12), the first guide portion (122) being made of a plastic material, and wherein a second guide portion (33) that matches the first guide portion (122) is provided at an end of the workpiece mounting base (30) facing the floating support (60), the first guide portion (122) being in clearance fit with the second guide portion (33);

The workpiece mounting seat (30) guides the movement of the sleeving piece (12) through the first guide part (122) and the second guide part (33).

10. The shaft pressing device according to claim 9, characterized in that the gap distance between the first guide part (122) and the second guide part (33) in the shaft pressing direction is a preset value, and the preset value is 0.1-0.2mm.