CN218350449U - Stator leakage detection equipment - Google Patents

Abstract

The utility model relates to a stator leakage detection device, which comprises a stator component, wherein two ends of a mandrel which axially penetrates through the stator component are horizontally hung and supported on a tool, a thimble component is arranged on the tool which is positioned at the lateral outside of the stator component, and the end part of a cable which is led out from one mandrel is electrically connected on a thimble in the thimble component; the positive electrode touch plate is driven by the positive electrode lifting assembly to touch silicon steel sheets on the circumferential wall surface of the stator assembly, and the negative electrode touch plate is driven by the negative electrode lifting assembly to touch the thimble; during the test, through anodal touch panel, negative pole touch panel respectively with stator module's silicon steel sheet, cable conductor electric connection to anodal, negative pole, when stator module itself has the electric leakage condition, will form the route between positive negative pole and report to the police and remind to realized the automated inspection to stator module before the in-wheel motor assembly, effectively reduced the cost of maintenance and consuming time to the unusual in-wheel motor of parameter.

Description

Stator leakage detection equipment

Technical Field

The utility model belongs to the technical field of the stator detects technique and specifically relates to a stator leakage detection equipment.

Background

In the prior art, before the hub motor is assembled, whether the stator has the electric leakage phenomenon caused by the winding problems such as contact of a copper wire and an iron core and the like cannot be judged in advance, and the defects of the stator can be found only when relevant parameters of the whole hub motor are detected after the subsequent hub motor is assembled; although the existing related handheld withstand voltage tester can detect the stator in advance, the batch online test of the stator before the hub motor is assembled cannot be met due to the complex and time-consuming operation.

SUMMERY OF THE UTILITY MODEL

The applicant provides a stator leakage detection equipment with a reasonable structure aiming at the defects in the prior art, so that the stator assembly can be rapidly and automatically detected before assembly, and unnecessary assembly rework and follow-up maintenance on the hub motor are effectively reduced through embedding detection.

The utility model discloses the technical scheme who adopts as follows:

a kind of stator leakage detection equipment, including the stator module, the horizontal hanging of both ends of dabber axially run through the stator module is supported on frock, locate at stator module side direction frock of outside and install the thimble assembly, the cable conductor end electrical behavior that is drawn from one of them dabber links up on the thimble in the thimble assembly; still include with test power electric connection's anodal touch panel and negative pole touch panel, anodal touch panel touches with the silicon steel sheet of stator module circumference wall under anodal lifting unit drives, and the negative pole touch panel touches with the thimble under negative pole lifting unit drives.

As a further improvement of the above technical solution:

the testing power supply further comprises an alarm unit, and after the positive contact plate and the negative contact plate are respectively contacted with the silicon steel sheet and the thimble, if a passage is formed between the positive electrode and the negative electrode of the testing power supply, the alarm unit gives an alarm.

The positive electrode touch panel is electrically connected with the positive electrode of the test power supply through a positive electrode lead, and the negative electrode touch panel is electrically connected with the negative electrode of the test power supply through a negative electrode lead; and nylon parts for electric isolation are arranged between the driving power of the anode touch panel and the anode lifting assembly and between the driving power of the cathode touch panel and the cathode lifting assembly.

The structure of the positive lifting assembly is as follows: the lifting plate is made of nylon materials, a first air cylinder for pushing the lifting plate to move up and down is connected and mounted above the lifting plate, and positive contact plates are arranged at the bottom of the lifting plate in parallel at intervals; and a buffer shaft is vertically arranged between the positive contact plate and the lifting plate, and an elastic part is sleeved on the buffer shaft between the positive contact plate and the lifting plate.

The structure of the negative lifting assembly is as follows: the device comprises a second air cylinder, wherein a nylon plate is arranged at the end part of the downward output end of the second air cylinder, and a negative electrode touch plate is fixed on the bottom surface of the nylon plate.

During testing, the stator assembly on the tool is positioned right below the anode touch plate at the bottom end of the anode lifting assembly, and the middle part of the bottom surface of the descending anode touch plate is in tangential contact with the silicon steel sheet at the top end of the stator assembly; and the top needle assembly on the tool is positioned right below the negative contact plate at the bottom end of the negative lifting assembly, and the center of the bottom surface of the descending negative contact plate is contacted with the top end of the thimble.

The device also comprises a rack, wherein a conveying line is distributed on the left side and the right side of the rack in a penetrating manner, and a positive lifting assembly and a negative lifting assembly are arranged in the rack above the conveying line through a top plate; the tool is transferred into the rack along with the conveying line, and the tool is stopped and limited by a stop limiting mechanism fixed on the conveying line frame.

The structure of the tool is as follows: the device comprises a bottom plate supported on a conveying line, side plates are arranged on the top surface of the bottom plate at intervals, the middle parts of the top surfaces of the side plates are provided with inwards concave arc structures which are consistent in axial direction, and a mandrel of a stator assembly is erected through the inwards concave arc structures on the side plates; and lug plates are symmetrically arranged on the bottom plate positioned outside the side plates and positioned outside the axial direction of the corresponding core shaft.

The cable wire end fixing device is characterized in that a terminal is fixedly mounted at the end of the cable wire and sleeved on the ejector pin from top to bottom.

The thimble is upwards inserted on the support, and the support is fixedly arranged on a bottom plate of the tool; the outer wall surface of the thimble is set to be a conical surface, and the small end of the thimble is arranged upwards; the diameter of the terminal upper hole is located between the diameter of the small end and the diameter of the large end of the ejector pin.

The utility model has the advantages as follows:

the utility model has the advantages of compact and reasonable structure, convenient and fast use, during testing, through the positive electrode touch panel, the negative electrode touch panel respectively with stator module's silicon steel sheet, cable conductor electric connection to the positive pole, the negative pole, when stator module itself has the electric leakage condition, will form the route and report to the police and remind between the positive and negative poles, thereby realized the automated inspection to stator module before in-wheel motor assembly, through embedding the detection effectively reduce the cost of maintenance and consuming time to the unusual in-wheel motor of parameter, reduced follow-up unnecessary assembly rework, and detection efficiency is high, effectual;

the utility model discloses still include following advantage:

the utility model discloses a leakage detection equipment can establish ties on in-wheel motor assembly line, can carry out automated inspection to it before carrying out the stator module assembly, reliably replaces the not enough of artifical handheld detection among the prior art, effective helping hand in the probability of reprocessing that reduces in-wheel motor when promoting efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention (omitting the frame and the conveying line).

Fig. 3 is a schematic structural view of the anode lifting assembly of the present invention.

Fig. 4 is a schematic diagram of the arrangement of the stator assembly and the thimble assembly in the tool of the present invention.

Fig. 5 is a schematic structural diagram of the stator assembly of the present invention.

Wherein: 1. testing the power supply; 2. a conveying line; 3. assembling; 4. a stator assembly; 5. a positive electrode touch panel; 6. a positive lifting assembly; 7. a negative lifting assembly; 8. a negative electrode touch plate; 9. a thimble assembly;

11. a positive electrode lead; 12. a negative electrode lead;

21. a blocking and limiting mechanism; 22. a frame; 23. a top plate;

31. a base plate; 32. a side plate; 33. an ear plate;

41. a cable wire; 42. a mandrel; 43. a terminal;

61. a first cylinder; 62. a guide shaft; 63. a lifting plate; 64. a buffer shaft; 65. an elastic member;

71. a second air cylinder; 72. a nylon plate;

91. a support; 92. and (4) a thimble.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and fig. 2, the stator leakage detecting apparatus of this embodiment includes a stator assembly 4, two ends of a mandrel 42 axially penetrating through the stator assembly 4 are horizontally hung and supported on a fixture 3, a thimble assembly 9 is installed on the fixture 3 located laterally outside the stator assembly 4, and an end of a cable 41 led out from one of the mandrels 42 is electrically connected to a thimble 92 in the thimble assembly 9; still include with test power 1 electric connection's anodal touch panel 5 and negative pole touch panel 8, anodal touch panel 5 touches with the silicon steel sheet of stator module 4 circumference wall under anodal lifting unit 6 drives, and negative pole touch panel 8 touches with thimble 92 under negative pole lifting unit 7 drives.

In this embodiment, during testing, the silicon steel sheet of the stator assembly 4 and the cable 41 are electrically connected to the positive electrode and the negative electrode through the positive electrode contact plate 5 and the negative electrode contact plate 8, respectively, and when the stator assembly 4 itself has an electric leakage condition, a path is formed between the positive electrode and the negative electrode.

In this embodiment, through the setting of thimble assembly 9, regard it as the intermediate medium, realized stator module 4's cable conductor 41 and test power supply 1's negative pole between electric connection, be convenient for especially under the condition is constantly changed to stator module 4, quick electric property between cable conductor 41 and the negative pole links up, convenient to use, helping hand in detection efficiency's promotion.

In one embodiment, in order to facilitate reminding an operator of timely handling when an abnormality is detected, the testing device further comprises an alarm unit, and after the positive contact plate 5 and the negative contact plate 8 are respectively contacted with the silicon steel sheet and the thimble 92, if a passage is formed between the positive electrode and the negative electrode of the testing power supply 1, the alarm unit gives an alarm.

The alarm unit of the embodiment includes but is not limited to one or two of a warning light, a buzzer, voice broadcast, large screen display and the like, and can be connected in series in a positive and negative electrode path, and an alarm prompt is sent out when the path is formed; or the alarm unit and the paths of the anode and the cathode are connected to the master controller, and the master controller controls the alarm unit to work when the paths are formed.

In one embodiment, the positive electrode contact plate 5 is electrically connected with the positive electrode of the test power supply 1 through a positive electrode lead 11, and the negative electrode contact plate 8 is electrically connected with the negative electrode of the test power supply 1 through a negative electrode lead 12; nylon parts for electrical isolation are arranged between the driving power of the anode touch plate 5 and the anode lifting assembly 6 and between the driving power of the cathode touch plate 8 and the cathode lifting assembly 7.

In this embodiment, through the arrangement of the nylon member, the positive contact plate 5 and the negative contact plate 8 are prevented from being electrically connected to corresponding portions of the stator assembly 4, and are not electrically connected to other components to cause errors or interference, so as to effectively ensure the reliability of the detection of the stator assembly 4.

In this embodiment, the positive electrode contact plate 5 and the negative electrode contact plate 8 are made of conductive materials.

In the embodiment shown in fig. 3, the structure of the positive lifting assembly 6 is: the device comprises a lifting plate 63 made of nylon, wherein a first cylinder 61 for pushing the lifting plate 63 to move up and down is connected and mounted above the lifting plate 63, and positive touch plates 5 are arranged at the bottom of the lifting plate 63 at intervals in parallel; a buffer shaft 64 is vertically arranged between the positive contact plate 5 and the lifting plate 63, and an elastic member 65 is sleeved on the buffer shaft 64 between the positive contact plate 5 and the lifting plate 63.

The positive contact plate 5 descends under the pushing of the cylinder I61 along with the lifting plate 63, when the bottom surface of the positive contact plate 5 contacts the circumferential surface formed by the silicon steel sheets of the stator assembly 4, the positive contact plate 5 can move relative to the lifting plate 63 under the action of the buffer shaft 64 and the elastic piece 65, and the compression elasticity of the elastic piece 65 enables the bottom surface of the positive contact plate 5 to be attached to the circumferential surface of the silicon steel sheets, so that the positive contact plate 5 can have certain buffer performance when contacting downwards, hard contact can be avoided, the contact effectiveness of the positive contact plate can be reliably guaranteed under the action of the elastic force, and the silicon steel sheets are electrically connected with the positive electrode of the test power supply 1 through the positive contact plate 5 and the positive lead 11.

In this embodiment, the first cylinder 61 may have an output end facing downward and be mounted on the top plate 23, and the top plate 23 is fixedly mounted on the upper portion of the frame 22; the bottom end of the output end of the first cylinder 61 is fixedly mounted with the center of the lifting plate 63, guide shafts 62 are symmetrically mounted between the two ends of the lifting plate 63 and the top plate 23, the guide shafts 62 penetrate the top plate 23 upwards, and the bottom ends of the guide shafts 62 are fixed with the lifting plate 63; when the cylinder I61 drives the lifting plate 63 to move up and down, the guide shaft 62 synchronously moves up and down relative to the top plate 23, and plays a role in guiding the lifting plate 63 to lift.

In this embodiment, the positive electrode contact plate 5 is located in the middle position below the lifting plate 63, and the buffer shafts 64 are symmetrically arranged relative to the axial direction of the output end of the first cylinder 61, so as to ensure the stability of the lifting plate 63 driving the positive electrode contact plate 5 to move up and down and the reliability of the contact between the bottom surface of the positive electrode contact plate 5 and the stator assembly 4.

In the embodiment shown in fig. 4, the structure of the negative lifting assembly 7 is: the device comprises a second cylinder 71, a nylon plate 72 is installed at the downward output end part of the second cylinder 71, and a negative electrode touch plate 8 is fixed on the bottom surface of the nylon plate 72.

In this embodiment, the second cylinder 71 is also mounted on the top plate 23 with its output end facing downward.

In this embodiment, the nylon lifting plate 63 forms an electrical isolation protection for the positive electrode contact plate 5, and the nylon plate 72 forms an electrical isolation protection for the negative electrode contact plate 8.

In one embodiment, during testing, the stator assembly 4 on the tool 3 is positioned right below the positive contact plate 5 at the bottom end of the positive lifting assembly 6, and the middle part of the bottom surface of the descending positive contact plate 5 is in tangential contact with the silicon steel sheet at the top end of the stator assembly 4; the upper thimble assembly 9 of the tooling 3 is positioned right below the negative contact plate 8 at the bottom end of the negative lifting assembly 7, and the center of the bottom surface of the negative contact plate 8 after descending is contacted with the top end of the thimble 92.

Under other use operating mode, positive touch panel 5, negative pole touch panel 8 also can lay in for other position of stator module 4 on, correspond under corresponding drive, can make positive touch panel 5, negative pole touch panel 8 accurate quick with stator module 4's corresponding position electric connection, can realize the detection to stator module 4.

In another embodiment, in order to realize reasonable layout of the detection equipment relative to the existing production line, the detection equipment further comprises a rack 22, the conveyor line 2 is distributed through the rack 22 from left to right, and a positive lifting assembly 6 and a negative lifting assembly 7 are installed in the rack 22 above the conveyor line 2 through a top plate 23; the tool 3 is moved to the rack 22 along with the conveying line 2, and the tool 3 is stopped and limited by the stop limiting mechanism 21 fixed on the frame of the conveying line 2.

The leakage detection equipment of this embodiment can establish ties on in-wheel motor assembly line, realizes the string line, can carry out automated inspection to it before carrying out the assembly of stator module 4, reliably replaces the not enough of artifical handheld detection among the prior art, and effective helping hand is in the probability of reprocessing that reduces in-wheel motor when raising efficiency.

The stop limit mechanism 21 in this embodiment may be a stop block which is driven by a power mechanism and moves up and down, and is limited in the moving direction of the tool 3, so as to detect the stator assembly 4 on the tool 3, and after the detection is finished and qualified, the tool 3 can continue to be conveyed to the next station along with the conveying line 2 through the downward movement of the stop block.

The test power supply 1 in this embodiment may be placed below the conveyor line 2 and on a support plate of the rack 22, so as to ensure the reliability of the electrical connection between the test power supply 1 and the positive contact plate 5 and the negative contact plate 8.

In the embodiment shown in fig. 4, the structure of the tool 3 is: the fixture comprises a bottom plate 31 supported on a conveying line 2, side plates 32 are mounted on the top surface of the bottom plate 31 at intervals, inner concave arc structures with the same axial direction are arranged in the middle of the top surface of each side plate 32, a mandrel 42 of a subassembly 4 is set through the inner concave arc structure frames on the side plates 32, and the support and the limitation of the fixture 3 on the stator assembly 4 are realized; the bottom plate 31 positioned outside the side plate 32 is also symmetrically provided with lug plates 33, and the lug plates 33 are positioned outside the axial direction of the corresponding spindle 42; by the arrangement of the ear plate 33, after the stator assembly 4 is placed on the tool 3, the stator assembly 4 is limited in the axial direction of the mandrel 42, so that the stator assembly 4 is prevented from moving or shifting in the direction.

In this embodiment, the distance between the two ear plates 33 is slightly greater than the distance between the two ends of the core shaft 42, so as to facilitate the loading and unloading operations of the stator assembly 4 on the tool 3; or, the two ear plates 33 may be configured to move relative to the bottom plate 31, and after the stator assembly 4 is loaded, the ear plates 33 are moved to the outside of the end of the mandrel 42 from a remote location for limiting, so as to further facilitate loading and unloading operations.

In the embodiment shown in fig. 5, the terminal 43 is fixedly mounted at the end of the cable 41, and the terminal 43 is sleeved on the thimble 92 from top to bottom, so as to achieve quick and reliable electrical connection between the cable 41 and the thimble 92.

Further, the thimble 92 is inserted upwards onto the support 91, and the support 91 is fixedly mounted on the bottom plate 31 of the tool 3; the outer wall surface of the thimble 92 is a conical surface, and the small end of the thimble 92 is arranged upwards so that the terminal 43 can be sleeved towards the thimble 92 from top to bottom; the diameter of the hole in the terminal 43 is between the diameter of the small end and the diameter of the large end of the thimble 92, which facilitates the quick and reliable sheathing of the terminal 43 on the thimble 92.

The support 91 in this embodiment may be a part made of an insulating material to reduce or even avoid the influence on the electrical connection between the thimble 92 and the terminal 43.

In this embodiment, the diameter of the small end of the upper portion of the thimble 92 is smaller than the hole diameter of the terminal 43, so as to facilitate the quick sleeving of the terminal 43; on the other hand, the diameter of the large end of the lower portion of the thimble 92 is larger than the hole diameter of the terminal 43, so that the terminal 43 is sleeved on the thimble 92 far away from the support 91, thereby ensuring the reliability of the electrical connection between the sleeved terminal 43 and the thimble 92.

The utility model discloses a use-way does:

the stator assembly 4 is supported and placed on the tool 3, and the end part of the cable 41 led out from the core shaft 42 of the stator assembly 4 is sleeved on the thimble 92 of the thimble assembly 9 through the terminal 43, which can be completed before the stator assembly 4 enters the conveying line 2;

when the tool 3 moves to the testing equipment along with the conveying line 2, the stopping and limiting mechanism 21 is used for limiting the movement of the tool 3;

the positive electrode lifting assembly 6 and the negative electrode lifting assembly 7 respectively work to drive the corresponding positive electrode contact plate 5 and the corresponding negative electrode contact plate 8 to descend until the bottom surface of the positive electrode contact plate 5 is in contact with and abuts against the circumferential wall surface of the stator assembly 4, which is formed by silicon steel sheets, and the bottom surface of the negative electrode contact plate 8 is in contact with and abuts against the top of a thimble 92 in the thimble assembly 9;

the test power supply 1 starts to work and is electrically connected with the anode touch panel 5 and the cathode touch panel 8 through the anode lead 11 and the cathode lead 12 respectively;

the positive contact plate 5 is abutted against the circumferential surface of the stator assembly 4 formed by silicon steel sheets, and the negative contact plate 8 is electrically connected with the cable 41 of the stator assembly 4 through the thimble 92 and the terminal 43; when the stator assembly 4 is abnormal, the silicon steel sheet of the stator assembly is communicated with the cable 41, so that a passage is formed between the anode and the cathode of the test power supply 1, and an alarm unit can be used for alarming and reminding, so that an operator can deal with the abnormality as soon as possible; when stator subassembly 4 itself is unusual, be electrical property disconnection between its silicon steel sheet and the cable conductor 41, then can not constitute the route between the anodal of test power supply 1 and the negative pole, detect qualified this moment to need not personnel's intervention, after anodal lifting unit 6, negative pole lifting unit 7 and blockking stop gear 21 reverse work in proper order, frock 3 will carry stator subassembly 4 and continue to go forward along with transfer chain 2.

The utility model discloses realized before the assembly of in-wheel motor the automatic detection to stator module, through set up the cost of maintenance that detects the in-wheel motor that effectively reduces the parameter anomaly with consuming time, reduced follow-up unnecessary assembly and reworked to detection efficiency is high, effectual.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims (10)

1. A stator leakage detecting device comprising a stator assembly (4), characterized in that: two ends of a mandrel (42) which axially penetrates through the stator assembly (4) are horizontally hung and supported on the tool (3), the tool (3) which is positioned on the lateral outside of the stator assembly (4) is provided with a thimble assembly (9), and the end part of a cable (41) led out from one mandrel (42) is electrically connected with a thimble (92) in the thimble assembly (9); still include with test power supply (1) electric connection's anodal touch panel (5) and negative pole touch panel (8), anodal touch panel (5) are touched with the silicon steel sheet of stator module (4) circumference wall under anodal lifting unit (6) drive, and negative pole touch panel (8) are touched with thimble (92) under negative pole lifting unit (7) drive.

2. A stator leakage detecting device according to claim 1, wherein: the testing power supply further comprises an alarm unit, and after the positive contact plate (5) and the negative contact plate (8) are respectively contacted with the silicon steel sheet and the ejector pin (92), if a passage is formed between the positive electrode and the negative electrode of the testing power supply (1), the alarm unit gives an alarm.

3. A stator leakage detecting device according to claim 1, wherein: the positive electrode touch plate (5) is electrically connected with the positive electrode of the testing power supply (1) through a positive electrode lead (11), and the negative electrode touch plate (8) is electrically connected with the negative electrode of the testing power supply (1) through a negative electrode lead (12); and nylon parts for electric isolation are arranged between the driving power of the anode touch plate (5) and the anode lifting assembly (6) and between the driving power of the cathode touch plate (8) and the cathode lifting assembly (7).

4. A stator leakage detecting device according to claim 1, wherein: the structure of the positive electrode lifting assembly (6) is as follows: the device comprises a lifting plate (63) made of nylon materials, wherein a first cylinder (61) for pushing the lifting plate to move up and down is connected and installed above the lifting plate (63), and positive touch plates (5) are arranged at the bottom of the lifting plate (63) at intervals in parallel; buffering shafts (64) are vertically arranged between the positive contact plate (5) and the lifting plate (63), and elastic pieces (65) are sleeved on the buffering shafts (64) between the positive contact plate (5) and the lifting plate (63).

5. A stator leakage detecting device according to claim 1, wherein: the structure of the negative electrode lifting assembly (7) is as follows: the device comprises a second cylinder (71), a nylon plate (72) is installed at the end part of the downward output end of the second cylinder (71), and a negative electrode contact plate (8) is fixed on the bottom surface of the nylon plate (72).

6. A stator leakage detecting device according to claim 1, wherein: during testing, the stator assembly (4) on the tool (3) is positioned under the anode touch plate (5) at the bottom end of the anode lifting assembly (6), and the middle part of the bottom surface of the descending anode touch plate (5) is in tangential contact with the silicon steel sheet at the top end of the stator assembly (4); and the upper thimble assembly (9) of the tool (3) is positioned right below the cathode touch plate (8) at the bottom end of the cathode lifting assembly (7), and the center of the bottom surface of the cathode touch plate (8) after descending is contacted with the top end of the thimble (92).

7. A stator leakage detecting device according to claim 1, wherein: the device is characterized by further comprising a rack (22), wherein the conveying lines (2) are distributed on the left and right sides of the rack (22) in a penetrating mode, and a positive lifting assembly (6) and a negative lifting assembly (7) are installed in the rack (22) above the conveying lines (2) through a top plate (23); the fixture (3) is moved to the rack (22) along with the conveying line (2), and the fixture (3) is stopped and limited by a stop limiting mechanism (21) fixed on a frame of the conveying line (2).

8. A stator leakage detecting device according to claim 7, wherein: the structure of the tool (3) is as follows: the device comprises a bottom plate (31) supported on a conveying line (2), side plates (32) are mounted on the top surface of the bottom plate (31) at intervals, inner concave arc-shaped structures with the same axial direction are formed in the middle of the top surfaces of the side plates (32), and a mandrel (42) of a stator assembly (4) is erected through the inner concave arc-shaped structures on the side plates (32); the bottom plate (31) positioned outside the side plate (32) is also symmetrically provided with lug plates (33), and the lug plates (33) are positioned outside the axial direction of the corresponding mandrel (42).

9. A stator leakage detecting device according to claim 1, wherein: one end of the cable (41) is led out from the inside of the mandrel (42), the other end of the cable (41) is fixedly provided with a terminal (43), and the terminal (43) is sleeved on the thimble (92) from top to bottom.

10. A stator leakage detecting device according to claim 9, wherein: the ejector pin (92) is upwards inserted into the support (91), and the support (91) is fixedly installed on a bottom plate (31) of the tool (3); the outer wall surface of the thimble (92) is a conical surface, and the small end of the thimble (92) is arranged upwards; the diameter of the upper hole of the terminal (43) is positioned between the diameter of the small end and the diameter of the large end of the thimble (92).

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