CN213043580U

CN213043580U - Gap correction device

Info

Publication number: CN213043580U
Application number: CN202021776739.9U
Authority: CN
Inventors: 宋军; 夏理志; 黄红华; 王宗朝
Original assignee: Changzhou Delai Motor Co ltd
Current assignee: Changzhou Delai Motor Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-04-23
Anticipated expiration: 2030-08-21

Abstract

The application relates to a clearance orthotic devices, it relates to motor apparatus for producing technical field, and it includes the pressfitting piece, and the pressfitting piece is the part that makes the inner wall of boss towards the outer wall laminating of bearing. This application has the clearance between the outer wall through correcting the inner wall of boss and bearing for the inner wall of boss tightly wraps up on the outer lane of bearing, thereby when leading to the motor to take place the abnormal sound because end cover tolerance problem, can reduce the frequency of the mode of adopting the direct change end cover, reduce the disability rate of end cover, reduce the operating procedure of artifical rework, and then can reduce the manufacturing cost's of motor effect.

Description

Gap correction device

Technical Field

The application relates to the field of motor production devices, in particular to a gap correction device.

Background

At present, the motor is an electromagnetic device which realizes electric energy conversion or transmission according to an electromagnetic induction law. The motor in the related art comprises a motor body and an end cover, wherein the motor body comprises a main shaft, a bearing and a commutator, the bearing is sleeved on the circumferential direction of the main shaft, the commutator is sleeved on the circumferential direction of the main shaft, the main shaft penetrates through the axis of the motor body and penetrates through the axis of the end cover, and the bearing is located at one end, facing the end cover, of the main shaft. The boss is integrally formed on one side of the end cover, which is far away from the motor body, and the boss is sleeved on the circumference of the main shaft. One side of the boss facing the bearing is provided with an installation cavity, and when the end cover is assembled into the motor body, the bearing is installed in the installation cavity.

In order to adjust the gap between the bearing and the commutator when the end cover is assembled into the motor body, pre-load the bearing in the axial direction, improve the rigidity of the bearing, and reduce the resonance of the motor, a wave washer is generally sleeved on the circumference of the main shaft and is positioned between the bearing and the commutator. The boss with the mounting cavity can provide mounting space for the wave washer, and the thickness of the end cover can be reduced, so that materials are reduced.

When the motor is used, the inner ring of the bearing rotates along with the main shaft, and the outer ring of the bearing is wrapped by the inner wall of the boss at the end cover. However, the end caps can have partial defective products during batch manufacturing, and the dimensional tolerance and the design tolerance deviation of the defective products are large, but the defective products cannot be effectively discriminated by naked eyes.

When these end covers that the tolerance is unqualified are assembled to motor body, the inhomogeneous or too big circumstances in clearance can appear in the clearance of parcel between the boss inner wall of bearing circumference and the bearing perisporium to make the inner wall of the boss of end cover can not effectively wrap up the outer lane of bearing, and make the outer lane of bearing along with the rotation of main shaft and with the inner circle corotation of bearing, and then make the phenomenon that abnormal sound can appear when the motor uses.

When the motor is detected to be qualified, an inspector can rotate the main shaft to listen whether the inside of the motor emits abnormal sound, and when the motor generates abnormal sound, the motor is unqualified.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: when the motor is abnormal in sound caused by the tolerance problem of the end cover boss, the end cover can be directly scrapped by reworking the motor and replacing a new end cover, so that the production cost of the motor is easily increased.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the manufacturing cost who leads to is directly scrapped to the motor end cover improves, this application provides a clearance orthotic devices.

The application provides a clearance orthotic devices adopts following technical scheme:

a gap correction device comprises a pressing piece, wherein the pressing piece is a part for enabling the inner wall of a boss to be attached towards the outer wall of a bearing.

Through adopting above-mentioned technical scheme, the pressfitting spare can be with the outer wall of boss towards the outer wall department pressfitting of bearing to reduce the clearance between the inner wall of boss and the outer wall of bearing, and then can make the inner wall of boss tightly wrap up on the outer lane of bearing. When the motor is abnormal in sound caused by the tolerance problem of the end cover, the frequency of a mode of directly replacing the end cover can be reduced, so that the rejection rate of the end cover can be reduced, the operation steps of manual reworking can be reduced, and the production cost of the motor can be reduced.

Preferably, a pressing groove is formed in the pressing piece, and a group of symmetrically arranged side edges of the pressing groove penetrate through the pressing piece;

the pressing groove divides the pressing piece into a first pressing block and a second pressing block, auxiliary pressing holes are formed in the wall thickness of the first pressing block and the wall thickness of the second pressing block penetrating through the pressing piece, and the two auxiliary pressing holes are encircled to form a pressing hole capable of being coated on the circumferential direction of the boss;

and pressing the first pressing block or the second pressing block, wherein the side walls of the first pressing block and the second pressing block, which are positioned at the notch of the pressing groove, tend to be arranged in a fitting manner.

Through adopting above-mentioned technical scheme, the pressfitting piece also makes first pressfitting piece and second pressfitting piece be in the state that links to each other in the one side that the notch was kept away from to the pressfitting groove when the pressfitting piece is divided into first pressfitting piece and second pressfitting piece in the pressfitting groove. The circumference of boss stretches into in the pressfitting hole, first pressfitting piece or second pressfitting piece is moved in the pressure, can make first pressfitting piece and second pressfitting piece laminate gradually in the pressfitting groove towards one side of notch and close the notch in pressfitting groove gradually promptly, and make the pressfitting hole close gradually towards one side of pressfitting groove notch, thereby reduce the diameter in pressfitting hole and reach the effect of better even pressfitting boss perisporium, and then correct the clearance between the inner wall of boss and the outer wall of bearing, until the tight parcel of the inner wall of boss is on the outer lane of bearing, finally can reduce the disability rate of end cover and utilize less cost to reduce the defective product rate of motor.

The motor can also be rotated without limitation, so that the outer wall of the boss is pressed for several times, the gap between the inner wall of the boss and the outer wall of the bearing can be corrected more uniformly, and finally the inner wall of the boss is tightly coated on the outer ring of the bearing.

Preferably, when a pair of terminals is arranged at the end cover, at least one first limiting hole is arranged on the first pressing block, at least one second limiting hole is arranged on the second pressing block, and the first limiting hole and the second limiting hole are symmetrically arranged along the axis of the pressing hole;

the terminals are respectively positioned in the first limiting hole and the second limiting hole.

By adopting the technical scheme, according to the different specifications and models of the motors, the end covers of the motors can be provided with a pair of terminals, the first limit hole and the second limit hole are used for avoiding the interference of the terminals and the pressing piece, and the rotation of the motors can be limited when the outer walls of the bosses are pressed, so that the correction of the gap between the inner walls of the bosses and the outer walls of the bearings is more stable.

Preferably, the first limiting hole and the second limiting hole are waist-shaped holes bent into arcs, and the first limiting hole and the second limiting hole are symmetrically arranged along the pressing groove.

Through adopting above-mentioned technical scheme, adopt and bend into curved waist type hole, when the terminal correspondence stretches into two waist type downtheholes, make the terminal that is located first spacing downthehole support to lean on the one end of first spacing hole towards the pressfitting groove notch, the terminal that is located the spacing downthehole of second supports and leans on the one end that the spacing hole of second kept away from the pressfitting groove notch, carries out pressfitting for the first time, reaches the effect of positioning motor when pressfitting boss outer wall. After the first pressing is completed, the motor is rotated to enable the terminal in the first limiting hole to abut against one end, away from the notch of the pressing groove, of the first limiting hole, and the terminal in the second limiting hole abuts against one end, facing the notch of the pressing groove, of the second limiting hole, so that the second pressing is performed.

In conclusion, the gap between the inner wall of the boss and the outer wall of the bearing can be corrected more uniformly through at least two times of pressing. And only need rotate the motor and can carry out the pressfitting operation, and need not repeat the operation of taking out the boss of motor, inserting in the pressfitting hole, be favorable to promoting the efficiency of the clearance between the outer wall of the inner wall of correction boss and bearing to promote the efficiency of doing over again of motor.

Preferably, the pressing device further comprises a driving component, wherein the driving component drives the first pressing block to automatically face the second pressing block for pressing, or the driving component drives the second pressing block to automatically face the first pressing block for pressing.

Through adopting above-mentioned technical scheme, drive assembly is used for the pressfitting piece pressfitting of automatic drive, helps promoting the efficiency in the clearance between the inner wall of correcting the boss and the outer wall of bearing to promote the efficiency of doing over again of motor, and reduce the cost of artifical work.

Preferably, one side of the first pressing block, which faces the notch of the pressing groove, is connected with an extension block;

the driving assembly comprises a workbench, a group of supporting columns, a supporting plate and a driving cylinder, and the pressing piece is arranged on the workbench through the second pressing block;

the supporting columns are arranged on the workbench and positioned on two sides of the pressing piece, and the supporting plates are arranged at one ends of the supporting columns far away from the workbench;

the driving cylinder is installed on the supporting plate, an output shaft of the driving cylinder presses the extending block to face one side of the workbench in an inclined mode.

Through adopting above-mentioned technical scheme, the workstation is used for installation and fixed support post and pressfitting spare, and the support column is used for the erection bracing board, and the backup pad is used for the installation to drive actuating cylinder and is convenient for drive actuating cylinder's output shaft towards extension piece one side drive to the extension piece inclines towards workstation one side is moved in the pressure. Because the extension block is connected with the first pressing block, the arrangement of the extension block prolongs the force arm of the first pressing block, and the extension block can be conveniently pressed in a labor-saving manner to enable the first pressing block to incline towards one side of the second pressing block and close the notch of the pressing groove. The pressing piece is used for pressing the boss in a labor-saving manner, so that the inner wall of the boss is tightly wrapped on the outer ring of the bearing.

Preferably, the driving assembly further comprises a first pressing plate and a second pressing plate which are mounted on an output shaft of the driving cylinder, and one end, far away from the first pressing block, of the extension block is clamped between the first pressing plate and the second pressing plate.

Through adopting above-mentioned technical scheme, first clamp plate is used for pushing down when the output shaft of driving actuating cylinder drives workstation one side extension piece, and the second clamp plate is used for driving when the output shaft of driving actuating cylinder resets and extends the piece and reset. The combined action of the first pressing plate and the second pressing plate has the advantages that in the process that the driving cylinder drives the driving cylinder to reset, the extension block can be synchronously pressed down and reset with the output shaft of the driving cylinder, and the hidden danger that the first pressing block cannot be effectively reset due to rigid deformation of the pressing piece caused by long-term repeated use is reduced.

Preferably, a limiting part is arranged on the workbench, and the limiting part is located below the driving cylinder and limits the movement stroke of the output shaft of the driving cylinder.

By adopting the technical scheme, the limiting part is used for limiting the movement stroke of the output shaft of the driving cylinder, and the situation that the extension block is excessively pressed due to unstable air pressure input by the driving cylinder is reduced, so that the hidden danger that the extension block and the first pressing block are rigidly deformed or the extension block is broken is reduced.

Drawings

Fig. 1 is a schematic view of a motor structure of the related art 1.

Fig. 2 is a schematic view of a motor structure of the related art 2.

Fig. 3 is a schematic view of the overall structure of the gap correcting device according to embodiment 1 of the present application.

Fig. 4 is a schematic view of the overall structure of the gap correcting device according to embodiment 2 of the present application.

Fig. 5 is a schematic view of the entire structure of the gap correcting device according to embodiment 3 of the present application.

Description of reference numerals: 1. a motor body; 11. an end cap; 12. a main shaft; 13. a bearing; 14. a boss; 2. a terminal; 21. a first terminal; 22. a second terminal; 3. a pressing part; 31. a pressing groove; 32. a press-fit hole; 4. a first pressing block; 41. a first limit hole; 42. a first kidney-shaped hole; 43. an extension block; 5. a second pressing block; 51. a second limiting hole; 52. a second kidney-shaped hole; 6. a drive assembly; 61. a work table; 62. a support pillar; 63. a support plate; 64. a driving cylinder; 65. a first platen; 66. a second platen; 7. and a limiting member.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

As shown in fig. 1, a motor in related art 1 includes a motor body 1 and an end cover 11, where the motor body 1 includes a main shaft 12 and a bearing 13 sleeved on a circumference of the main shaft 12, the main shaft 12 penetrates through an axis of the motor body 1 and penetrates through an axis of the end cover 11, and the bearing 13 is located at one end of the main shaft 12 facing the end cover 11. The end cover 11 is provided with a boss 14 at one side away from the motor body 1, the boss 14 is sleeved on the circumference of the main shaft 12, an installation cavity is arranged at one side of the boss 14 facing the bearing 13, and when the motor body 1 is assembled into the end cover 11, the bearing 13 is installed in the installation cavity.

As shown in fig. 2, the motor of the related art 2 is mainly different from the motor of the related art 1 in that two terminals 2 are connected to a motor body 1, the terminals 2 are disposed through the wall thickness of an end cover 11 and extend out of the end cover 11, and the terminals 2 are symmetrically disposed along the axis of a boss 14.

The embodiment of the application discloses clearance orthotic devices.

Example 1

Referring to fig. 1 and 3, the gap correction device includes drive assembly 6, pressfitting piece 3 and locating part 7, and drive assembly 6 drive pressfitting piece 3 for the automatic pressfitting of pressfitting piece 3 is 14 the outer wall, and is made the inner wall of boss 14 towards the laminating of the outer wall of bearing 13, thereby corrects the gap between the inner wall of boss 14 and the outer wall of bearing 13, makes the inner wall of boss 14 can tightly the cladding on the outer lane of bearing 13, and then reduces the disability rate of end cover 11. The limiting part 7 is used for limiting the stroke of the driving component 6 for pressing the pressing part 3, reducing the hidden danger that the pressing part 3 is rigidly deformed, and prolonging the service life of the pressing part 3. The technical scheme of the embodiment is suitable for pressing the boss 14 of the motor in the related art 1.

Referring to fig. 3, the driving assembly 6 includes a working table 61, a set of supporting columns 62, a supporting plate 63, a driving cylinder 64, a first pressing plate 65 and a second pressing plate 66, the supporting columns 62 are vertically disposed and installed on the working table 61, the supporting plate 63 is disposed parallel to the working table 61 and is installed at one end of the supporting columns 62 far away from the working table 61 through screws, the driving cylinder 64 is installed at one side of the supporting plate 63 facing the working table 61, and an output shaft of the driving cylinder 64 is arranged in a driving manner facing one side of the working table 61. The first pressure plate 65 and the second pressure plate 66 are fixedly sleeved on the circumference of the output shaft of the driving cylinder 64, and a mounting gap is reserved between the first pressure plate 65 and the second pressure plate 66.

Referring to fig. 3, the pressing member 3 is mounted on the worktable 61, a pressing groove 31 is formed in the pressing member 3, a notch of the pressing groove 31 is located at a side edge of the pressing member 3, and two side edges of the pressing groove 31 located in the thickness direction of the pressing member 3 penetrate through the pressing member 3, and the pressing member 3 is divided into a first pressing block 4 and a second pressing block 5. The first pressing block 4 or the second pressing block 5 is integrally connected with an extension block 43 at one side of the notch of the pressing groove 31, and one end of the extension block 43 far away from the first pressing block 4 is clamped between the first pressing plate 65 and the second pressing plate 66. The driving cylinder 64 starts to press the first pressing block 4 or the second pressing block 5, so that the side walls of the first pressing block 4 and the second pressing block 5 at the notch of the pressing groove 31 tend to be arranged in a fitting manner. The extension block 43 is located at the first press-fit block 4 in this embodiment.

The second pressing block 5 is mounted on the workbench 61 through a screw, and the screw is in threaded connection with the second pressing block 5 from one side of the workbench 61 facing the ground facing the second pressing block 5.

The first pressing block 4 and the second pressing block 5 penetrate through the thickness of the pressing piece 3 and are provided with auxiliary pressing holes, and the side wall of one side, opposite to the two auxiliary pressing holes, extends to the pressing groove 31 and is communicated with the pressing groove 31, so that the two auxiliary pressing holes are encircled to form a circular pressing hole 32 capable of being wrapped on the circumference of the boss 14.

Referring to fig. 3, a limiting member 7 is disposed on the workbench, the limiting member 7 is a limiting screw vertically mounted on the workbench 61, and the limiting member 7 is located below the driving cylinder. The output shaft pressing extension block 43 of the driving cylinder 64 inclines towards one side of the workbench 61 until the side walls of the first pressing block 4 and the second pressing block 5 at the groove opening of the pressing groove 31 are jointed, one side of the second pressing plate 66 facing the workbench 61 is abutted against one side of the limiting piece 7 away from the workbench 61, and the effect of limiting the motion stroke of the output shaft of the driving cylinder 64 is achieved. It is possible to reduce the occurrence of the situation in which the extension block 43 is excessively pressed by the driving cylinder 64 due to the instability of the air pressure input by the driving cylinder 64.

The implementation principle of the gap correction device in the embodiment of the application is as follows: put into the pressfitting hole 32 with the boss 14 of the motor among the correlation technique 1, start and drive actuating cylinder 64, the output shaft that drives actuating cylinder 64 drives extension piece 43 slope towards workstation 61 one side, and extension piece 43 can prolong the arm of force of first pressfitting piece 4 for thereby the cylinder can be comparatively laborsaving the pressure move first pressfitting piece 4 make pressfitting hole 32 towards pressfitting groove 31 notch one side closed. The pressfitting hole 32 is closed towards the pressfitting groove 31 notch one side so that the diameter of pressfitting hole 32 diminishes and thereby plays the effect of comparatively even pressfitting boss 14 to make the clearance between the inner wall of boss 14 and the outer wall of bearing 13 can be corrected by comparatively even, finally make the inner wall of boss 14 can comparatively even cladding on the outer lane of bearing 13. When the driving cylinder 64 is reset, the second pressing plate 66 pushes the extension block 43 to be reset passively, so that the pressing piece 3 can be reset well even if the pressing piece is used repeatedly for a long time.

After the boss 14 of the motor in the related art 1 is pressed for the first time, the motor in the related art 1 is rotated by an angle of 4-180 degrees without being too accurate, and then the second pressing is performed, so that the gap between the inner wall of the boss 14 and the outer wall of the bearing 13 can be corrected more uniformly. The pressing times of the bosses 14 of the same motor are better when 2 times or 3 times, the main shaft 12 of the motor is rotated after the gap is corrected, and if no obvious abnormal sound exists, the motor becomes a good product.

Through the research and use of the inventor, the material cost and the cost of labor that an end cover 11 was directly changed to a motor need 5-6 yuan, and adopt the utility model discloses technical scheme's clearance orthotic devices, the cost that a motor becomes the yields only needs 0.2-0.3 yuan, the cost of doing over again of the unqualified motor of saving that can be great.

Example 2

Referring to fig. 2 and 4, the difference between this embodiment and embodiment 1 is that at least one first limiting hole 41 is disposed on the first pressing block 4, at least one second limiting hole 51 is disposed on the second pressing block 5, and the first limiting hole 41 and the second limiting hole 51 are symmetrically disposed along the axis of the pressing hole 32. The technical solution of this embodiment is suitable for the press-fitting of the boss 14 of the motor in the related art 2. When the boss 14 is inserted into the press-fit hole 32, the terminal 2 disposed at the end cover 11 of the motor in the related art 2 may be inserted into the first limit hole 41 and the second limit hole 51, respectively, so as to avoid interference between the terminal 2 and the press-fit member 3 and limit rotation of the motor, so that the correction of the gap between the inner wall of the boss 14 and the outer wall of the bearing 13 is more stable.

Referring to fig. 2 and 4, in this embodiment, two first limiting holes 41 are disposed on the first pressing block 4, two second limiting holes 51 are disposed on the second pressing block 5, and the first limiting holes 41 and the second limiting holes 51 are symmetrically disposed along the pressing groove 31.

The implementation principle of the gap correction device in the embodiment of the application is as follows: when the boss 14 of the motor in the related art 2 is inserted into the press-fit hole 32, the terminals 2 are inserted into one of the first and second position-limiting holes 41 and 51, respectively. Two terminals 2 are respectively a first terminal 21 and a second terminal 22, when the first pressing is performed, the first terminal 21 is located in the first limiting hole 41 facing one side of the notch of the pressing groove 31, the second terminal 22 is located in the second limiting hole 51 far away from one side of the notch of the pressing groove 31, the driving cylinder 64 is started to perform the first pressing, and the effect of positioning the motor when the outer wall of the boss 14 is pressed is achieved. After the one-time pressing is completed, the motor in the related art 2 is taken out. Then, the first terminal 21 is inserted into the first position-limiting hole 41 on the side far from the notch of the press-fit groove 31, while the second terminal 22 is inserted into the second position-limiting hole 51 on the side facing the notch of the press-fit groove 31, and the boss 14 is located in the press-fit hole 32, so that the second press-fit is performed. In conclusion, through the two pressing processes, the gap between the inner wall of the boss 14 and the outer wall of the bearing 13 can be corrected more uniformly, and the inner wall of the boss 14 can tightly cover the outer ring of the bearing 13.

Example 3

Referring to fig. 2 and 5, the difference between the present embodiment and embodiment 2 is that one first limiting hole 41 and one second limiting hole 51 are provided, and the first limiting hole 41 and the second limiting hole 51 are waist-shaped holes bent into arcs, wherein the first limiting hole 41 is a first waist-shaped hole 42, and the second limiting hole 51 is a second waist-shaped hole 52. The first kidney-shaped hole 42 and the second kidney-shaped hole 52 are located at the outer periphery of the stitching hole 32 and are symmetrically arranged along the stitching groove 31. The first terminal 21 is located in the first kidney-shaped hole 42 and the second terminal 22 is located in the second kidney-shaped hole 52.

The implementation principle of the gap correction device in the embodiment of the application is as follows: when the boss 14 of the motor in the related art 2 extends into the press-fit hole 32, the first terminal 21 located in the first kidney-shaped hole 42 abuts against one end of the first kidney-shaped hole 42 facing the notch of the press-fit groove 31, and the second terminal 22 located in the second kidney-shaped hole 52 abuts against one end of the second kidney-shaped hole 52 far away from the notch of the press-fit groove 31, the driving cylinder 64 is started to perform the first press-fit, and the effect of positioning the motor when the outer wall of the boss 14 is pressed is achieved. After the first pressing, the motor is rotated to make the first terminal 21 in the first kidney-shaped hole 42 abut against one end of the first kidney-shaped hole 42 away from the notch of the pressing groove 31, and the second terminal 22 in the second kidney-shaped hole 52 abuts against one end of the second kidney-shaped hole 52 facing the notch of the pressing groove 31, and the driving cylinder 64 is started to press for the second time.

In summary, after at least two times of pressing, the gap between the inner wall of the boss 14 and the outer wall of the bearing 13 can be corrected more uniformly. And the pressing operation can be carried out only by rotating the motor, and the operation of taking out the boss 14 of the motor and inserting the boss into the pressing hole 32 is not required to be repeated, so that the efficiency of correcting the gap between the inner wall of the boss 14 and the outer wall of the bearing 13 is improved, and the rework efficiency of the motor is improved.

The motor can also be freely rotated within the radian range of the first kidney-shaped hole 42 and the second kidney-shaped hole 52, and then the motor is stopped from rotating to press the outer wall of the boss 14 through the pressing block. The pressing times of the bosses 14 of the same motor are optimal when the pressing times are 3 times, so that the gaps between the inner walls of the bosses 14 and the outer walls of the bearings 13 can be corrected more uniformly, the inner walls of the bosses 14 can be tightly coated on the outer rings of the bearings 13, and the hidden danger of abnormal sound when the motor is used is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A gap-straightening device characterized by: the bearing comprises a pressing part (3), wherein the pressing part (3) is a part for enabling the inner wall of a boss (14) to be attached to the outer wall of a bearing (13);

a pressing groove (31) is formed in the pressing piece (3), and a group of symmetrically arranged side edges of the pressing groove (31) penetrate through the pressing piece (3);

the pressing piece (3) is split into a first pressing block (4) and a second pressing block (5) by the pressing groove (31), auxiliary pressing holes are formed in the wall thickness of the first pressing block (4) and the wall thickness of the second pressing block (5) penetrating through the pressing piece (3), and the two auxiliary pressing holes are encircled to form a pressing hole (32) capable of being coated on the circumferential direction of the boss (14);

and pressing the first pressing block (4) or the second pressing block (5), wherein the side walls of the first pressing block (4) and the second pressing block (5) at the groove opening of the pressing groove (31) tend to be attached.

2. A gap-rectifying device according to claim 1, characterized in that: when the end cover (11) is provided with the pair of terminals (2), the first pressing block (4) is provided with at least one first limiting hole (41), the second pressing block (5) is provided with at least one second limiting hole (51), and the first limiting hole (41) and the second limiting hole (51) are symmetrically arranged along the axis of the pressing hole (32);

the terminals (2) are respectively positioned in the first limiting hole (41) and the second limiting hole (51).

3. A gap-rectifying device according to claim 2, characterized in that: the first limiting hole (41) and the second limiting hole (51) are waist-shaped holes bent into arcs, and the first limiting hole (41) and the second limiting hole (51) are symmetrically arranged along the pressing groove (31).

4. A gap-rectifying device according to claim 3, characterized in that: the pressing device is characterized by further comprising a driving assembly (6), wherein the driving assembly (6) drives the first pressing block (4) to automatically face the second pressing block (5) for pressing, or the driving assembly (6) drives the second pressing block (5) to automatically face the first pressing block (4) for pressing.

5. A gap-rectifying device according to claim 4, characterized in that: one side of the first pressing block (4) facing the notch of the pressing groove (31) is connected with an extension block (43);

the driving assembly (6) comprises a workbench (61), a group of supporting columns (62), a supporting plate (63) and a driving air cylinder (64), and the pressing piece (3) is installed on the workbench (61) through the second pressing block (5);

the supporting columns (62) are arranged on the workbench (61) and located on two sides of the pressing piece (3), and the supporting plates (63) are arranged at one ends, far away from the workbench (61), of the supporting columns (62);

the driving cylinder (64) is installed on the supporting plate (63), and an output shaft of the driving cylinder (64) presses the extension block (43) to incline towards one side of the workbench (61).

6. A gap-rectifying device according to claim 5, characterized in that: the driving assembly (6) further comprises a first pressing plate (65) and a second pressing plate (66) which are installed on an output shaft of the driving air cylinder (64), and one end, far away from the first pressing block (4), of the extending block (43) is clamped between the first pressing plate (65) and the second pressing plate (66).

7. A gap-rectifying device according to claim 6, characterized in that: the workbench (61) is provided with a limiting piece (7), and the limiting piece (7) is located below the driving cylinder (64) and limits the motion stroke of an output shaft of the driving cylinder (64).