A contact holding force testing device

Abstract

The present invention provides a contact piece holding force testing device, and relates to the technical field of contact piece testing devices. The contact piece holding force testing device comprises: a positioning identification module obtains the position coordinates of the contact piece; a control module controls a mechanical arm to drive a holding force providing module to be directly above the contact piece according to the position coordinates; when the lifting end of the holding force providing module is pressed down, a test head test piece is driven to contact the contact piece; a displacement sensor is connected to the lifting end of the holding force providing module, the displacement sensor is used to obtain the pressing distance value of the lifting end of the holding force providing module, and the obtained distance value is sent to the control module, the control module compares the distance value with a preset distance value, and if the distance value is equal to the preset distance value, the control module controls the holding force providing module to stop pressing down; the present invention provides a test force through a first spring and a displacement sensor, the magnitude of the force is more accurate, and the consistency of the test force is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of contact piece testing devices, and in particular to a contact piece retention force testing device. Background Art

[0002] At present, the retention force test of the contacts (pins / sockets) in the connector is done manually, which has low test efficiency and cannot guarantee the consistency of the test force. Although there are some auxiliary test tools, such tools can only provide the test force but cannot guarantee the consistency of the force, and the use of such tools is labor-intensive.

[0003] In view of this, the inventor of the present application invented a contact retention force testing device. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention designs a new structural device, which is a contact retention force testing device capable of automatically positioning a contact in a connector and automatically completing a contact retention force test.

[0005] The present invention solves the above technical problems through the following technical means: a contact holding force testing device, comprising: a mechanical arm, a positioning identification module, a holding force providing module, a test head conversion mechanism, a displacement sensor, and a control module;

[0006] The connecting shaft of the mechanical arm is fixedly connected to a mounting frame, the positioning identification module is fixed on one side of the mounting frame, the holding force providing module is fixed on the other side of the mounting frame, and the test head conversion mechanism is fixed in the mounting frame; the mechanical arm can drive the positioning identification module, the holding force providing module, and the test head conversion mechanism to move in the horizontal direction and the vertical direction;

[0007] The positioning and identification module obtains the position coordinates of the contact element;

[0008] The control module controls the robot arm to drive the holding force providing module to the top of the contact piece according to the position coordinates;

[0009] The rotating end of the test head conversion mechanism is fixed with a mounting plate, on which at least one test head test piece is arranged, and the test piece is located directly below the lifting end of the holding force providing module;

[0010] The holding force is provided to drive the test piece of the test head to contact with the contact piece when the module lifting end is pressed down;

[0011] The displacement sensor is connected to the lifting end of the holding force providing module. The displacement sensor is used to obtain the downward pressure distance value of the lifting end of the holding force providing module, and send the obtained distance value to the control module. The control module compares the distance value with the preset distance value. If the distance value is equal to the preset distance value, the control module controls the holding force providing module to stop pressing down.

[0012] Furthermore, the mounting frame is fixed to the connecting shaft of the robot arm through a flange connecting plate and the flange locking plate, the flange connecting plate is fixed to the top of the mounting frame, the flange locking plate is fixed to the top of the flange connecting plate, and the flange locking plate is fixed to the connecting shaft of the robot arm.

[0013] Furthermore, the positioning and identification module is an industrial camera, which includes a lens and a light source. The lens is installed at the bottom of the image input end of the industrial camera. A camera mounting plate is arranged between the industrial camera and the mounting frame. The camera mounting plate is respectively fixed to the industrial camera and the mounting frame. The camera mounting plate is fixed to the top of one side of the mounting frame. A light source fixing plate is arranged at the bottom of the lens. One side of the light source fixing plate is fixed to one side of the mounting frame. The light source is fixed at the bottom of the light source fixing plate. The light source fixing plate has a circular hole in the middle.

[0014] Furthermore, light source stiffening ribs are fixed on both sides of the connection between the light source fixing plate and the mounting frame.

[0015] Furthermore, the holding force providing module is an ejection cylinder, which is fixed on a side of the mounting frame away from the positioning identification module, and the displacement sensor is fixed on the lifting end of the ejection cylinder. The displacement sensor is fixed to the lifting end of the holding force providing module through a displacement sensor fixing plate. A bushing is also fixed on the telescopic end of the ejection cylinder, and the bushing is located on the top of the displacement sensor fixing plate. A spring guide shaft is inserted into the bushing, and the bottom end of the spring guide shaft extends downward to penetrate the displacement sensor, and the spring guide shaft is located directly above the test piece.

[0016] Furthermore, a first spring is provided on the surface of the spring guide shaft, and the first spring is located between the bushing and the displacement sensor. The bushing and the spring guide shaft limit and guide the first spring. When the spring guide shaft moves upward, it can compress the first spring. When compressed, the first spring provides a retaining force for the contact piece through the spring guide shaft.

[0017] Furthermore, the test head conversion mechanism includes a servo motor and a reducer, the servo motor is fixed in the mounting frame, the reducer is fixed at the bottom of the servo motor, the servo motor rotation end is connected to the reducer rotation input end, and the mounting plate is fixed at the reducer rotation output end.

[0018] Furthermore, a reducer fixing plate is fixed to the outside of the reducer, and the reducer fixing plate is fixed to the mounting frame. The mounting plate includes a turntable and a limit block. The turntable is fixed to the rotation output end of the reducer, and the turntable is located below the reducer fixing plate. The number of the limit block is at least one, and the limit block is fixed to the outer circumferential surface of the turntable.

[0019] Furthermore, the test piece includes a test head, a spring limiting ring, a test head mounting column, and a second spring. The test head mounting column passes through the limiting block, the spring limiting ring fixes the top of the test head mounting column, a second spring is passed through the surface of the test head mounting column, the second spring is limited between the spring limiting ring and the limiting block, and the test head mounting column guides the second spring; the second spring can lift and reset the test head mounting column and the spring limiting ring, and the test head is fixed to the bottom of the spring limiting ring.

[0020] Furthermore, the positioning and identification module is also used to identify the model of the contact piece; the control module drives the test head conversion mechanism to rotate, and moves the test piece corresponding to the model of the contact piece to the position directly below the telescopic end of the holding force providing module.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention first calculates the position coordinates of the contact piece by the positioning and identification module, and sends the position coordinate information to the control module. The control module controls the mechanical arm to move the holding force providing module and the test piece to just above the contact piece, and then starts the holding force providing module. The lifting end of the holding force providing module drives the displacement sensor and the spring guide shaft to move downward at the same time. The bottom of the spring guide shaft presses down the test head mounting column, and the test head mounting column presses down the test head. When the test head contacts the contact piece, a rebound force is generated, so that the spring guide shaft moves upward to compress the first spring. When the first spring is compressed, it provides pressure for the holding force of the test contact piece through the spring guide shaft. The downward movement distance value obtained by the displacement sensor is sent to the control module, and the control module compares and analyzes the distance value with the preset distance value. When the distance value is equal to the preset distance value, the control module controls the holding force providing module to stop pressing down, and matches the test force through the downward movement distance value of the displacement sensor. The test efficiency is high, the test force size is more accurate, the consistency of the test force is guaranteed, and it is avoided that the test force is too large or too small to meet the test requirements, or the contact piece is damaged by excessive test force.

[0023] 2. The present invention provides the test force through the first spring and the displacement sensor, and the magnitude of the force is more accurate; and it has a certain buffering effect. When the test force is abnormal, there is a certain buffer space, which can protect the contact piece.

[0024] 3. The present invention automatically identifies the specifications and models of the contact pieces through the positioning and identification module, and the control module matches and calls the matching test pieces to achieve automatic switching of the matching test pieces, and tests the contact pieces of different models, thereby further improving the testing efficiency of the contact piece retention force testing device and reducing the labor intensity of the testers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the contact retention force testing device of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the robotic arm of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the positioning and identification module of the present invention;

[0028] Figure 4 Provides a schematic diagram of the overall structure of the module for the retention force of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the test head conversion mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the control flow of the control module of the present invention.

[0031] In the figure: 1. Robotic arm; 2. Flange connecting plate; 3. Flange locking plate; 4. Positioning identification module; 5. Retention force providing module; 6. Test head conversion mechanism; 7. Test piece; 8. Displacement sensor; 9. Mounting frame;

[0032] 401, lens; 402, light source fixing plate; 403, light source; 404, light source stiffening rib; 405, camera mounting plate;

[0033] 501, top stiffening rib; 502, bushing; 503, first spring; 504, spring guide shaft; 505, displacement sensor fixing plate; 507, bottom stiffening rib;

[0034] 601, servo motor; 602, reducer; 603, limit block; 604, reducer fixing plate; 605, photoelectric switch; 606, photoelectric switch fixing sheet metal; 607, turntable;

[0035] 700, test head; 701, spring limiting ring; 702, test head mounting column; 703, second spring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0038] Embodiment 1

[0039] See also Figure 1 , 2 As shown, a contact piece retention force testing device described in this embodiment includes a robotic arm 1, a positioning identification module 4, a retention force providing module 5, a test head conversion mechanism 6, a test piece 7, a displacement sensor 8, and a control module. The connecting shaft of the robotic arm 1 is fixedly connected to a mounting frame 9, the positioning identification module 4 is fixed on one side of the mounting frame 9, the retention force providing module 5 is fixed on the other side of the mounting frame 9, and the test head conversion mechanism 6 is fixed in the mounting frame 9.

[0040] The robot arm 1 can drive the positioning identification module 4, the holding force providing module 5, and the test head conversion mechanism 6 to move in the horizontal direction and the vertical direction. The horizontal direction includes horizontal lateral movement and horizontal longitudinal movement. Figure 1 As shown in , the Y-axis is longitudinal, the X-axis is horizontal, and the Z-axis is vertical. The positioning identification module 4, the holding force providing module 5, the test head conversion mechanism 6, and the displacement sensor 8 are all connected to the control module signal or wire connection. The positioning identification module 4 obtains the position coordinates of the contact piece and sends the coordinates to the control module. The control module controls the robot arm 1 to drive the holding force providing module 5 to the top of the contact piece according to the position coordinates. A mounting disk is fixed at the rotating end of the test head conversion mechanism 6, and at least one test head test piece 7 is arranged on the mounting disk. The test piece 7 is located directly below the lifting end of the holding force providing module 5; when the lifting end of the holding force providing module 5 is pressed down, the test head test piece 7 is driven to contact the contact piece.

[0041] The displacement sensor 8 is connected to the lifting end of the holding force providing module 5. The displacement sensor 8 is used to obtain the downward pressure distance value of the lifting end of the holding force providing module 5, and send the obtained distance value to the control module. The control module compares the distance value with the preset distance value. If the distance value is equal to the preset distance value, the control module controls the holding force providing module 5 to stop pressing down; the preset distance value setting should correspond to the test force corresponding to the contact piece, and can be specifically set by the staff on-site debugging, and no specific limitation is made here.

[0042] The distance value obtained by the displacement sensor 8 is used to determine whether the test force has been reached. When the distance value is equal to the preset distance value, the control module controls the holding force providing module 5 to stop pressing down. The test force size is more accurate, ensuring the consistency of the test force, avoiding the test force being too large or too small to meet the test requirements, or the test force being too large to cause damage to the contact parts.

[0043] See also Figure 1 , 2 As shown, the mounting frame 9 is fixed to the connecting shaft of the robot arm 1 through the flange connecting plate 2 and the flange locking plate 3. The flange connecting plate 2 is fixed to the top of the mounting frame 9, the flange locking plate 3 is fixed to the top of the flange connecting plate 2, and the flange locking plate 3 is fixed to the connecting shaft of the robot arm 1.

[0044] In this embodiment, the positioning and identification module 4 is an industrial camera, which includes a lens 401 and a light source 403. The lens 401 is installed at the bottom of the image input end of the industrial camera. A camera mounting plate 405 is arranged between the industrial camera and the mounting frame 9. The camera mounting plate 405 is respectively fixed to the industrial camera and the mounting frame 9. The camera mounting plate 405 is fixed to the top of one side of the mounting frame 9. A light source fixing plate 402 is arranged at the bottom of the lens 401. One side of the light source fixing plate 402 is fixed to one side of the mounting frame 9. The light source 403 is fixed to the bottom of the light source fixing plate 402. The light source fixing plate 402 has a circular hole in the middle. The lens 401 takes a picture of the target object through the circular hole, and the light source 403 provides fill light for the target object.

[0045] To prevent the light source 403 from shaking during movement, light source stiffening ribs 404 are fixed on both sides of the connection between the light source fixing plate 402 and the mounting frame 9. The light source stiffening ribs 404 are used to improve the connection stability between the light source fixing plate 402 and the mounting frame 9, making the connection between the light source fixing plate 402 and the mounting frame 9 more stable, so that the industrial camera can obtain clearer images.

[0046] See also Figure 4As shown, the holding force providing module 5 is an ejection cylinder, which is fixed on the side of the mounting frame 9 away from the positioning identification module 4, and the displacement sensor 8 is fixed on the lifting end of the ejection cylinder. The displacement sensor 8 is fixed to the lifting end of the holding force providing module 5 through a displacement sensor fixing plate 505, and the displacement sensor fixing plate 505 is arranged between the displacement sensor 8 and the lifting end of the ejection cylinder. The displacement sensor fixing plate 505 is respectively fixed to the displacement sensor 8 and the lifting end of the ejection cylinder. A bushing 502 is also fixed to the telescopic end of the ejection cylinder. The bushing 502 is located at the top of the displacement sensor fixing plate 505, and a spring guide shaft 504 is inserted in the bushing 502. The bottom end of the spring guide shaft 504 extends downward to penetrate the displacement sensor 8, and the spring guide shaft 504 is located directly above the test piece 7.

[0047] A first spring 503 is inserted through the surface of the spring guide shaft 504. The first spring 503 is located between the bushing 502 and the displacement sensor 8. The bushing 502 and the spring guide shaft 504 limit and guide the first spring 503. When the spring guide shaft 504 moves upward, it can compress the first spring 503. When compressed, the first spring 503 provides a holding force for the contact piece through the spring guide shaft 504.

[0048] In order to improve the structural stability of the side where the mounting frame 9 is connected to the retaining force providing module 5, a top stiffening rib 501 is fixed to the upper end of the side where the mounting frame 9 is connected to the retaining force providing module 5, and a bottom stiffening rib 507 is fixed to the lower end. The other end of the top stiffening rib 501 and the other end of the bottom stiffening rib 507 are both fixed to the side where the mounting frame 9 is connected to the positioning identification module 4, thereby achieving the stability of the overall test structure.

[0049] See also Figure 5 As shown, the test head conversion mechanism 6 includes a servo motor 601 and a reducer 602. The servo motor 601 is fixed in the mounting frame 9, the reducer 602 is fixed at the bottom of the servo motor 601, the rotating end of the servo motor 601 is connected to the rotating input end of the reducer 602, and the mounting plate is fixed at the rotating output end of the reducer 602. The servo motor 601 drives the reducer 602 to rotate, and the reducer 602 drives the mounting plate to rotate, and the mounting plate drives the test piece 7 to move to just below the lifting end of the holding force providing module 5.

[0050] A photoelectric switch 605 is provided on one side of the reducer fixing plate 604, and a photoelectric switch fixing sheet metal 606 is provided between the photoelectric switch 605 and the reducer fixing plate 604. The photoelectric switch 605 is fixed to the reducer fixing plate 604 through the photoelectric switch fixing sheet metal 606, and the photoelectric switch 605 locates the origin of the reducer fixing plate 604.

[0051] See also Figure 5 As shown, a reducer fixing plate 604 is fixed to the outside of the reducer 602, and the reducer fixing plate 604 is fixed to the mounting frame 9, as shown in FIG. Figure 2 As shown, the mounting plate includes a turntable 607 and a limit block 603 . The turntable 607 is fixed to the rotation output end of the reducer 602 . The turntable 607 is located below the reducer fixing plate 604 . There is at least one limit block 603 , which is fixed to the outer circumference of the turntable 607 .

[0052] The test piece 7 includes a test head 700, a spring limiting ring 701, a test head mounting column 702, and a second spring 703. The test head mounting column 702 passes through the limiting block 603. The spring limiting ring 701 fixes the top of the test head mounting column 702. The second spring 703 is penetrated on the surface of the test head mounting column 702. The second spring 703 is limited between the spring limiting ring 701 and the limiting block 603. The test head mounting column 702 guides the second spring 703. The test head mounting column 702 also precisely matches the limiting block 603. The limiting block 603 guides the test head mounting column 702, and It can prevent the test head mounting column 702 from rotating. For example, the test head mounting column 702 is a hexagonal prism, and a hexagonal cavity matched with the hexagonal prism is opened in the limit block 603, and the hexagonal prism runs through the hexagonal cavity; the second spring 703 is a pagoda spring, and the second spring 703 can lift the test head mounting column 702 and the spring limit ring 701, so that the test head 700 is reset. The test head 700 is fixed to the bottom end of the spring limit ring 701. The test head 700 is in direct contact with the contact piece during operation. In order to facilitate the replacement of the test head 700, the test head 700 is screwed on the bottom end of the spring limit ring 701 through a thread.

[0053] The contact holding force testing device described in this embodiment has a working principle as follows: the positioning identification module 4 first calculates the position coordinates of the contact and sends the position coordinate information to the control module. The control module controls the mechanical arm 1 to move the holding force providing module 5 and the test piece 7 to the top of the contact, and then starts the holding force providing module 5. The lifting end of the holding force providing module 5 simultaneously drives the displacement sensor 8 and the spring guide shaft 504 to move downward. The bottom of the spring guide shaft 504 presses down the test head mounting column 702. The test head mounting column 702 presses down the test head 700. When the test head 700 contacts the contact, a rebound force is generated, so that the spring guide shaft 504 moves downward. The shaft 504 moves upward to compress the first spring 503. When compressed, the first spring 503 provides pressure for the holding force of the test contact piece through the spring guide shaft 504. The downward distance value obtained by the displacement sensor 8 is sent to the control module, and the control module compares and analyzes the distance value with the preset distance value. When the distance value is equal to the preset distance value, the control module controls the holding force providing module 5 to stop pressing down, and matches the test force through the downward distance value of the displacement sensor 8. The test efficiency is high, the test force size is more accurate, and the consistency of the test force is guaranteed to avoid the test force being too large or too small to meet the test requirements, or the test force being too large to damage the contact piece.

[0054] Secondly, the test force is provided by the first spring 503 and the displacement sensor 8, and the magnitude of the force is more accurate; and it has a certain buffering effect. When the test force is abnormal, there is a certain buffering space, which can protect the contact piece.

[0055] In this embodiment, the positioning and identification module 4 locates the contact piece, which can be achieved by using a commonly used industrial component positioning algorithm.

[0056] Embodiment 2

[0057] This embodiment is further improved on the basis of the first embodiment. When there are multiple models of contacts, the positioning and identification module 4 is also used to identify the model of the contact and send the model to the control module. The control module drives the test head conversion mechanism 6 to rotate and moves the test piece 7 corresponding to the model of the contact to the position directly below the telescopic end of the holding force providing module 5. In this embodiment, the positioning and identification module 4 can identify different models of contacts through image recognition algorithms, such as Dijkstra; Bellman-Ford; Floyd-Warshall; Prim; Kruskal, etc. This is a prior art, so it will not be described again.

[0058] Specifically, see Figure 1 , 5 As shown, a plurality of limit blocks 603 are fixed on the outer circumference of the turntable 607, and a plurality of test pieces 7 corresponding to the models of the contact pieces are arranged in different limit blocks 603 in a one-to-one correspondence. The number of the test pieces 7 is consistent with the number of the limit blocks 603. The servo motor 601 rotates to drive the reducer 602 to rotate, and the reducer 602 drives the turntable 607 to rotate. The turntable 607 moves the corresponding test piece 7 to be directly below the spring guide shaft 504.

[0059] This embodiment is a contact retention force testing device, the working principle is as follows:

[0060] The control module is used to sequentially number several limit blocks 603 and associate different types of test pieces 7 set in the limit blocks 603 with the sequential numbers, such as the sequential numbers are 1, 2, 3, 4... etc., and the sequential numbers are consistent with the number of limit blocks 603.

[0061] The control module is also used to record the spacing value s between adjacent limit blocks 603. In this embodiment, the limit blocks 603 are fixed on the outer circumference of the turntable 607 at an equal distance from the center of the turntable 607, and the spacing value s between adjacent limit blocks 603 is consistent.

[0062] The control module sets the test piece 7 corresponding to the sequence number n to the initial position, which is located directly below the telescopic end of the holding force providing module 5 , that is, the test head mounting column 702 is located directly below the spring guide shaft 504 .

[0063] The positioning and identification module 4 is used to identify the model of the contact piece and send the model to the control module. The control module matches the contact piece model with the test piece 7 of different models, and uses the test piece 7 of the same model as the contact piece model for this use, and retrieves the sequence number of the limit block 603 corresponding to the model, and uses the retrieved sequence number of the limit block 603 as the initial position to facilitate the subsequent selection of test pieces 7 of different models and calculate the stroke s of the servo motor 601.

[0064] The control module calculates the stroke y of the servo motor 601 according to the retrieved sequence number. The calculation logic is as follows:

[0065] If the retrieved sequence number is n+3, y=n+3-n*s, the control module controls the running time of the servo motor 601 according to the stroke y and the speed of the servo motor 601, and drives the test piece 7 used this time to just below the telescopic end of the holding force providing module 5.

[0066] The specifications and models of the contact pieces are automatically identified through the positioning and identification module 4, and the matching test piece 7 is matched and called by the control module to realize automatic switching of the matching test piece 7, so as to test the contact pieces of different models, thereby further improving the testing efficiency of the contact piece retention force testing device and reducing the labor intensity of the testers.

[0067] It should be noted that, in this article, if there are first and second, etc., relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A contact retention force testing device, characterized in that: include: A mechanical arm (1), a positioning identification module (4), a holding force providing module (5), a test head conversion mechanism (6), a displacement sensor (8), and a control module; The connecting shaft of the mechanical arm (1) is fixedly connected to a mounting frame (9), the positioning identification module (4) is fixed on one side of the mounting frame (9), the retaining force providing module (5) is fixed on the other side of the mounting frame (9), and the test head conversion mechanism (6) is fixed in the mounting frame (9); the mechanical arm (1) can drive the positioning identification module (4), the retaining force providing module (5), and the test head conversion mechanism (6) to move in the horizontal direction and the vertical direction; The positioning and identification module (4) obtains the position coordinates of the contact element; The control module controls the mechanical arm (1) to drive the holding force providing module (5) to the position directly above the contact piece according to the position coordinates; A mounting plate is fixed to the rotating end of the test head conversion mechanism (6), and at least one test head test piece (7) is arranged on the mounting plate. The test piece (7) is located directly below the lifting end of the holding force providing module (5); When the lifting end of the holding force providing module (5) is pressed downward, the test head test piece (7) is driven to contact with the contact piece; The displacement sensor (8) is connected to the lifting end of the holding force providing module (5), and the displacement sensor (8) is used to obtain the downward pressing distance value of the lifting end of the holding force providing module (5), and send the obtained distance value to the control module. The control module compares the distance value with the preset distance value, and if the distance value is equal to the preset distance value, the control module controls the holding force providing module (5) to stop pressing downward.

2. A contact retention force testing device according to claim 1, characterized in that: The mounting frame (9) is fixed to the connecting shaft of the mechanical arm (1) via a flange connecting plate (2) and a flange locking plate (3); the flange connecting plate (2) is fixed to the top of the mounting frame (9); the flange locking plate (3) is fixed to the top of the flange connecting plate (2); and the flange locking plate (3) is fixed to the connecting shaft of the mechanical arm (1).

3. A contact retention force testing device according to claim 1, characterized in that: The positioning and identification module (4) is an industrial camera, the industrial camera comprising a lens (401) and a light source (403), the lens (401) being mounted at the bottom of an image input terminal of the industrial camera, a camera mounting plate (405) being arranged between the industrial camera and a mounting frame (9), the camera mounting plate (405) being respectively fixed to the industrial camera and the mounting frame (9), the camera mounting plate (405) being fixed to the top of one side of the mounting frame (9), a light source fixing plate (402) being arranged at the bottom of the lens (401), one side of the light source fixing plate (402) being fixed to one side of the mounting frame (9), the light source (403) being fixed to the bottom of the light source fixing plate (402), and a circular hole being provided in the middle of the light source fixing plate (402).

4. A contact retention force testing device according to claim 3, characterized in that: Light source stiffening ribs (404) are fixed on both sides of the connection between the light source fixing plate (402) and the mounting frame (9).

5. A contact retention force testing device according to claim 4, characterized in that: The holding force providing module (5) is an ejection cylinder, which is fixed on a side of the mounting frame (9) away from the positioning identification module (4). The displacement sensor (8) is fixed on the lifting end of the ejection cylinder. The displacement sensor (8) is fixed to the lifting end of the holding force providing module (5) through a displacement sensor fixing plate (505). A bushing (502) is also fixed on the telescopic end of the ejection cylinder. The bushing (502) is located on the top of the displacement sensor fixing plate (505). A spring guide shaft (504) is inserted into the bushing (502). The bottom end of the spring guide shaft (504) extends downward to penetrate the displacement sensor (8), and the spring guide shaft (504) is located directly above the test piece (7).

6. A contact retention force testing device according to claim 5, characterized in that: A first spring (503) is inserted through the surface of the spring guide shaft (504). The first spring (503) is located between the bushing (502) and the displacement sensor (8). The bushing (502) and the spring guide shaft (504) realize the limiting and guiding of the first spring (503). When the spring guide shaft (504) moves upward, it can compress the first spring (503). When compressed, the first spring (503) provides a holding force for the contact member through the spring guide shaft (504).

7. A contact retention force testing device according to claim 6, characterized in that: The test head conversion mechanism (6) comprises a servo motor (601) and a reducer (602); the servo motor (601) is fixed in a mounting frame (9); the reducer (602) is fixed at the bottom of the servo motor (601); the rotating end of the servo motor (601) is connected to the rotating input end of the reducer (602); and the mounting plate is fixed to the rotating output end of the reducer (602).

8. A contact retention force testing device according to claim 7, characterized in that: A reducer fixing plate (604) is fixed on the outside of the reducer (602), and the reducer fixing plate (604) is fixed to the mounting frame (9). The mounting plate comprises a turntable (607) and a limit block (603). The turntable (607) is fixed to the rotation output end of the reducer (602), and the turntable (607) is located below the reducer fixing plate (604). The number of the limit block (603) is at least one, and the limit block (603) is fixed to the outer peripheral surface of the turntable (607).

9. A contact retention force testing device according to claim 8, characterized in that: The test piece (7) comprises a test head (700), a spring limiting ring (701), a test head mounting column (702), and a second spring (703); the test head mounting column (702) passes through a limiting block (603); the spring limiting ring (701) fixes the top of the test head mounting column (702); a second spring (703) is passed through the surface of the test head mounting column (702); the second spring (703) is limited between the spring limiting ring (701) and the limiting block (603); the test head mounting column (702) guides the second spring (703); the second spring (703) can lift and reset the test head mounting column (702) and the spring limiting ring (701); and the test head (700) is fixed at the bottom of the spring limiting ring (701).

10. A contact retention force testing device according to claim 9, characterized in that: The positioning identification module (4) is also used to identify the model of the contact piece; the control module drives the test head conversion mechanism (6) to rotate, and moves the test piece (7) corresponding to the model of the contact piece to the position directly below the telescopic end of the holding force providing module (5).

Images