Safety switch test equipment

Abstract

The utility model discloses a safety switch test device. The safety switch test device comprises a first frame body and a second frame body which are fixedly connected to a bottom plate; the clamping unit is fixedly connected to the first frame body, two driving ends of the clamping unit are respectively connected with clamping blocks, and the clamping unit is used for driving the two clamping blocks to clamp the safety switch; the detection probe assembly is mounted on the probe mounting seat, and detection probes on the detection probe assembly are in one-to-one correspondence with contacts on the safety switch clamped by the clamping unit front and back; the first driving unit is fixedly connected to the second frame body, is in driving connection with the probe mounting seat, and is used for driving the probe mounting seat to drive the detection probe assembly to move back and forth, so that a detection probe on the detection probe assembly is in contact with or separated from a contact on the safety switch; the control device is electrically connected with the clamping unit, the detection probe assembly and the first driving unit; by adopting the above technical scheme, compared with manual detection by using a universal meter, the detection efficiency of the safety switch is greatly improved, and the detection is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of safety switch testing, and particularly relates to a safety switch testing device. Background Art

[0002] A safety switch is a switch that can prevent personnel from entering a dangerous area before all safety conditions are met. There are various types, including plug-in switches, safety magnetic switches, safety door lock switches, safety pull cord switches, emergency stop buttons, hinge interlock switches, safety enable switches, safety limit switches, explosion-proof switches, etc. During the production process of safety switches, it is necessary to detect the contact conditions to determine whether they are qualified. The existing safety switch detection method is as follows: manually use a multimeter to judge the on-off conditions of each contact. The detection method is inefficient, and the detection depends on manual evaluation, which has certain deviations. In addition, it is also necessary to manually insert and remove the key insert piece cooperating with the safety switch to judge the locking situation, and the detection efficiency is also relatively low. Content of the Utility Model

[0003] In order to overcome the existing technical defects and solve at least one of the above technical problems, the purpose of the utility model is to provide a safety switch testing device to solve the above technical problems.

[0004] The technical solution adopted by the utility model to solve the technical problems is as follows:

[0005] According to one aspect of the utility model, a safety switch testing device is designed, including:

[0006] A bottom plate, fixedly connected with a first frame body and a second frame body;

[0007] A clamping unit, fixedly connected to the first frame body. Two driving ends of the clamping unit are respectively connected with clamping blocks, and the clamping unit is used to drive the two clamping blocks to clamp the safety switch;

[0008] A detection probe assembly, installed on a probe mounting seat. The detection probes on the detection probe assembly correspond to the contacts on the safety switch clamped by the clamping unit one by one in the front and back;

[0009] A first driving unit, fixedly connected to the second frame body and drivingly connected with the probe mounting seat, is used to drive the probe mounting seat to drive the detection probe assembly to move back and forth, so that the detection probes on the detection probe assembly contact and separate from the contacts on the safety switch;

[0010] A control device, electrically connected with the clamping unit, the detection probe assembly and the first driving unit.

[0011] With the above technical solution, when the contacts on the safety switch need to be detected, the safety switch is clamped by the clamping unit, and the control device controls the first driving unit to drive the probe mounting seat to move, driving a plurality of detection probes to move towards the safety switch, so that the plurality of detection probes are in one-to-one contact with the plurality of contacts on the safety switch. Since the plurality of detection probes are electrically connected to the control device, the control device can determine the on-off status of each contact on the safety switch, and then energize the safety switch. The control device determines the power-on status of each contact on the safety switch, thereby realizing the detection of the contacts on the safety switch. After the detection is completed, the control device controls the first driving unit to drive the detection probes to reset. Then, the clamped safety switch is removed and released, and the next switch is continued to be detected. The detection process is automated. Compared with manually using a multimeter for detection, the detection efficiency of the safety switch is greatly improved, and the detection is more accurate.

[0012] In order to better solve the above technical defects, the present utility model also has a better technical solution:

[0013] In some embodiments, it further includes:

[0014] A key insert, installed on the insert seat, and the key insert corresponds to the jack on the safety switch clamped by the clamping unit;

[0015] A second driving unit, fixedly connected to the bottom plate and drivingly connected to the insert seat, for driving the insert seat to drive the key insert to move back and forth, so that the insertion end of the key insert is inserted into the jack and separated from the jack. The second driving unit is electrically connected to the control device.

[0016] Through the second driving unit, automatic plugging and unplugging detection can be performed between the key insert and the safety switch. Compared with manually performing plugging and unplugging detection, the detection efficiency is higher.

[0017] In some embodiments, a switch support plate fixedly connected to the first frame is arranged below the clamping unit. A positioning groove for the lower end of the safety switch to be placed therein for positioning is arranged on the switch support plate, and a notch communicating with the positioning groove is arranged on the front side of the right end of the switch support plate. Thus, the safety switch can be positioned, facilitating detection.

[0018] In some embodiments, vertical through grooves are respectively arranged on one side of the two clamping blocks facing each other, and the width of the through groove is greater than the thickness of the safety switch. Thus, when the safety switch is subjected to plugging and unplugging tests, the safety switch can be prevented from detaching from the clamping blocks.

[0019] In some embodiments, the second driving unit is a linear module. The insert seat is fixedly connected to the driving seat of the second driving unit. A first induction sheet is fixedly connected to the left side of the driving seat. A first groove-type photoelectric switch electrically connected to the control device is arranged on the left side of the second driving unit. When the second driving unit drives the driving seat to drive the first induction sheet to move, when the first induction sheet is placed in the groove of the first groove-type photoelectric switch, the end of the key insert is inserted into the jack, and the second driving unit stops driving. Thus, the key insert can be positioned to ensure the accuracy of its insertion.

[0020] In some embodiments, a second induction sheet is fixedly connected to the left side of the driving seat. A second groove-type photoelectric switch electrically connected to the control device is arranged on the left side of the second driving unit. When the second driving unit drives the driving seat to drive the second induction sheet to move, when the second induction sheet is placed in the groove of the second groove-type photoelectric switch, the second driving unit stops driving.

[0021] In some embodiments, the first driving unit is a slide cylinder. The probe mounting seat is fixedly connected to the U-shaped seat. The U-shaped seat is fixedly connected to the driving end of the first driving unit. A cover shell covering the U-shaped seat is arranged on the outside of the U-shaped seat.

[0022] In some embodiments, the clamping unit is a pneumatic finger or an electric gripper.

[0023] In some embodiments, the insert seat is fixedly connected to the driving seat by screws. A strip-shaped through hole for adjusting its fixed position is arranged on the insert seat.

[0024] In some embodiments, the control device is a PLC controller. The PLC controller is installed in the control box. A display screen, a signal lamp and a control button electrically connected to the PLC controller are arranged on the control box. Description of the Drawings

[0025] Figure 1 Structural schematic diagram of a safety switch testing device provided by an embodiment of the present invention;

[0026] Figure 2 Side view structural schematic diagram of the safety switch testing device;

[0027] Figure 3 Structural schematic diagram of the clamping unit and the first frame body on the safety switch testing device;

[0028] Figure 4 Schematic diagram of the state where the clamping unit clamps the safety switch;

[0029] Figure 5 Structural schematic diagram of the detection probe assembly and the probe mounting seat;

[0030] Figure 6 Schematic structural diagram of the second driving unit on the safety switch testing device;

[0031] Reference numerals:

[0032] 1. Base plate; 11. First frame; 12. Second frame; 2. Clamping unit; 21. Clamping block; 211. Through groove; 3. Detection probe assembly; 31. Probe mounting seat; 32. U-shaped seat; 33. Cover; 4. First driving unit; 5. Key insert; 51. Insert seat; 511. Strip-shaped through hole; 6. Second driving unit; 60. Driving seat; 61. First induction sheet; 62. Second induction sheet; 63. First groove-shaped photoelectric switch; 64. Second groove-shaped photoelectric switch; 7. Switch support plate; 71. Positioning groove; 72. Notch; 8. Control box; 81. Display screen; 82. Signal lamp; 83. Control button; 9. Safety switch; 91. Contact; 92. Jack. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the detailed implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present utility model. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0034] In the description of the present utility model, it should be understood that for the orientation descriptions, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0035] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, fixed connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0036] Refer to Figures 1 to 6 As shown, a safety switch testing device provided by the present utility model includes: a base plate 1, a clamping unit 2, a detection probe assembly 3, a first driving unit 4, a key insert 5, a second driving unit 6, and a control device.

[0037] A first frame 11 and a second frame 12 are fixedly connected to the base plate 1. The first frame 11 and the second frame 12 correspond to each other front and back and both have a U-shaped structure.

[0038] The clamping unit 2 is fixedly connected to the first frame 11. The clamping unit 2 is a pneumatic finger or an electric gripper. The two driving ends of the clamping unit 2 are respectively connected with clamping blocks 21. The clamping unit 2 is used to drive the two clamping blocks 21 to clamp the safety switch 9. Among them, vertical through slots 211 are respectively arranged on the opposite sides of the two clamping blocks 21, and the width of the through slots 211 is greater than the thickness of the safety switch 9. The clamping unit 2 is electrically connected to the control device and is controlled by the control device to act.

[0039] A switch support plate 7 fixedly connected to the first frame 11 is arranged below the clamping unit 2. A positioning groove 71 for the lower end of the safety switch 9 to be inserted and positioned is arranged on the switch support plate 7. A notch 72 communicating with the positioning groove 71 is arranged on the front side of the right end of the switch support plate 7. The notch 72 is for exposing the jack 93 on the safety switch 9.

[0040] The detection probe assembly 3 is installed on the probe mounting seat 31. The probe mounting seat 31 is an electric wood block or an insulating plastic block. In this embodiment, the probe mounting seat 31 is preferably an electric wood block. The detection probe assembly 3 includes a plurality of detection probes. Among them, the number of detection probes is three or four or five or six or more. In this embodiment, the number of detection probes is preferably sixteen and is arranged in four columns. The number of contacts 91 on the safety switch 9 is the same as the number of detection probes. When the clamping unit 2 clamps the safety switch 9, the sixteen detection probes correspond to the sixteen contacts 91 on the safety switch 9 one by one before and after. The detection probe assembly 3 is electrically connected to the control device.

[0041] The first driving unit 4 is fixedly connected to the second frame 12. The first driving unit 4 is drivingly connected to the probe mounting seat 31 and is used to drive the probe mounting seat 31 to drive the detection probe assembly 3 to move back and forth, so that the detection probes on the detection probe assembly 3 contact and separate from the contacts 91 on the safety switch 9. Among them, the first driving unit 4 is a slide cylinder or an electric cylinder. The probe mounting seat 31 is fixedly connected to the U-shaped seat 32. The U-shaped seat 32 is fixedly connected to the driving end of the first driving unit 4. A cover 33 covering the U-shaped seat 32 is arranged on the outside of the U-shaped seat 32. The first driving unit 4 is electrically connected to the control device and is controlled by the control device to act.

[0042] The key insert 5 is installed on the insert seat 51. The key insert 5 corresponds to the jack 92 on the safety switch 9 clamped by the clamping unit 2.

[0043] The second driving unit 6 is fixedly connected to the bottom plate 1. The second driving unit 6 is drivingly connected to the insert seat 51. Further, the second driving unit 6 is a linear module. The insert seat 51 is fixedly connected to the driving seat 60 of the linear module by screws. A strip-shaped through hole 511 for adjusting its longitudinal fixed position is provided on the insert seat 51. The second driving unit 6 is used to drive the insert seat 51 to drive the key insert 5 to move back and forth, so that the insertion end of the key insert 5 is inserted into the jack 92 on the safety switch 9 and separated from the jack 92. The second driving unit 6 is electrically connected to the control device and is controlled by the control device to act.

[0044] A first induction sheet 61 and a second induction sheet 62 are fixedly connected to the left side of the driving seat 60. A first groove-type photoelectric switch 63 and a second groove-type photoelectric switch 64 electrically connected to the control device are arranged on the left side of the second driving unit 6. When the control device controls the second driving unit 6 to drive the driving seat 60 to drive the first induction sheet 61 to move backward, when the first induction sheet 61 is placed in the groove of the first groove-type photoelectric switch 63, the end of the key insert 5 is inserted into the jack 92 on the safety switch 9, and the control device controls the second driving unit 6 to stop driving; when the control device controls the second driving unit 6 to drive the driving seat 60 to drive the second induction sheet 62 to move forward, when the second induction sheet 62 is placed in the groove of the second groove-type photoelectric switch 64, the control device controls the second driving unit 6 to stop driving.

[0045] The control device is a PLC controller. The PLC controller is installed in the control box 8. The control box 8 is fixedly connected to the rear side of the bottom plate 1. A display screen 81, a signal lamp 82 and control buttons 83 are arranged on the front side of the control box 8. The display screen 81, the signal lamp 82 and the control buttons 83 are all electrically connected to the PLC controller. The control buttons 83 include a switch button, an emergency stop button, a start button and a pause button. The signal lamp 82 is a three-color lamp, and the three colors respectively represent three states of OK, NG and alarm.

[0046] The detection principle of the safety switch 9 test device is as follows: When it is necessary to detect the contacts 91 (the contacts 91 include normally open contacts 91 and normally closed contacts 91) on the safety switch 9, place the lower end of the safety switch 9 in the positioning groove 71 and place it vertically. Then press the start button to start the device. The control device controls the clamping unit 2 to clamp the safety switch 9. After that, the control device controls the first driving unit 4 to drive the probe mounting seat 31 to drive the sixteen detection probes to move towards the safety switch 9, and make the sixteen detection probes contact the sixteen contacts 91 on the safety switch 9 one by one. Since the detection probes are electrically connected to the control device, the control device detects and determines the electrical signal conditions of the contacts 91 on the safety switch 9, determines the on-off conditions, and then connects the safety switch 9 to electricity. After that, the control device detects and determines the electrical signals of the contacts 91 on the safety switch 9, determines the on-off power conditions, and the on-off conditions of each contact 91 will be displayed by the signal lamp 82, so as to realize the detection of the contacts 91 on the safety switch 9. Then, the second driving unit 6 drives the insert seat 51 to drive the key insert 5 to move towards the safety switch 9, so that the insertion end of the key insert 5 is inserted into the jack 92 on the safety switch 9. After insertion, the signal of the contact 91 on the safety switch 9 will change. Then, the second driving unit 6 drives the insert mounting seat to move backward to pull out the key insert 5. If it is set on the PLC controller that it can be pulled out, it can be detected whether the pulling-out function is normal. If it can be pulled out, it is normal; if it cannot be pulled out, it is abnormal. If it is set on the PLC controller that it is locked, then in the set locked situation, the key insert 5 cannot be pulled out. When the locking time expires, the second driving unit 6 drives the insert seat 51 to move to pull out the key insert 5. If the key insert 5 can be pulled out, it is determined that the switch locking function is normal; if it cannot be pulled out, it is determined that the switch locking function is abnormal. After the detection is completed, the control device controls the first driving unit 4 to drive the detection probe assembly 3 to reset, the second driving unit 6 to drive the key insert 5 to reset, and the clamping unit 2 to release the safety switch 9. Then, take away the released and clamped safety switch 9 and continue to detect the next safety switch 9.

[0047] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the creative concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A safety switch testing device, characterized in that: include: A bottom plate, fixedly connected to the first frame and the second frame; A clamping unit, fixedly connected to the first frame, wherein two driving ends of the clamping unit are respectively connected to clamping blocks, and the clamping unit is used to drive the two clamping blocks to clamp the safety switch; A detection probe assembly is mounted on the probe mounting seat, and the detection probes on the detection probe assembly correspond to the contacts on the safety switch clamped by the clamping unit in a front-to-back manner; A first driving unit is fixedly connected to the second frame and is drivingly connected to the probe mounting seat, and is used to drive the probe mounting seat to drive the detection probe assembly to move forward and backward, so that the detection probe on the detection probe assembly contacts and separates from the contact on the safety switch; The control device is electrically connected to the clamping unit, the detection probe assembly and the first driving unit.

2. A safety switch testing device according to claim 1, characterized in that: Also includes: A key insert is installed on the insert seat, and the key insert corresponds to the socket on the safety switch clamped by the clamping unit; The second driving unit is fixedly connected to the base plate and is drivingly connected to the insert seat, and is used to drive the insert seat to drive the key insert to move forward and backward, so that the insertion end of the key insert is inserted into the socket and separated from the socket. The second driving unit is electrically connected to the control device.

3. A safety switch testing device according to claim 1 or 2, characterized in that: A switch support plate fixedly connected to the first frame is arranged below the clamping unit, a positioning groove for positioning the lower end of the safety switch is arranged on the switch support plate, and a notch communicating with the positioning groove is arranged on the front side of the right end of the switch support plate.

4. A safety switch testing device according to claim 1, characterized in that: One side opposite to the two clamping blocks is respectively provided with a vertically penetrating through groove, and the width of the through groove is greater than the thickness of the safety switch.

5. A safety switch testing device according to claim 2, characterized in that: The second driving unit is a linear module, the insert seat is fixedly connected to the driving seat of the second driving unit, a first sensing sheet is fixedly connected to the left side of the driving seat, and a first slot-type photoelectric switch electrically connected to the control device is arranged on the left side of the second driving unit. When the second driving unit drives the driving seat to drive the first sensing sheet to move, when the first sensing sheet is placed in the slot of the first slot-type photoelectric switch, the end of the key insert sheet is inserted into the jack, and the second driving unit stops driving.

6. A safety switch testing device according to claim 5, characterized in that: A second sensing sheet is fixedly connected to the left side of the driving seat, and a second slot-type photoelectric switch electrically connected to the control device is arranged on the left side of the second driving unit. When the second driving unit drives the driving seat to drive the second sensing sheet to move, when the second sensing sheet is placed in the slot of the second slot-type photoelectric switch, the second driving unit stops driving.

7. A safety switch testing device according to claim 1, characterized in that: The first driving unit is a slide cylinder, the probe mounting seat is fixedly connected to the C-shaped seat, the C-shaped seat is fixedly connected to the driving end of the first driving unit, and a cover shell is arranged outside the C-shaped seat to cover it.

8. A safety switch testing device according to claim 1, characterized in that: The clamping unit is a pneumatic finger or an electric clamp.

9. A safety switch testing device according to claim 5, characterized in that: The insert seat is fixedly connected to the driving seat by screws, and a strip-shaped through hole for adjusting the fixing position thereof is arranged on the insert seat.

10. A safety switch testing device according to claim 1, characterized in that: The control device is a PLC controller, which is installed in a control box. The control box is provided with a display screen, a signal light and a control button which are electrically connected to the PLC controller.

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