A device for detecting the fixing force of a lock

Abstract

The utility model provides a kind of lock fixing force detection device, including turntable positioning mechanism, operation platform and the support frame connecting both, lifting cylinder mechanism is installed on support frame, and detection reset mechanism is connected under lifting cylinder mechanism, and there are evenly distributed detection station on turntable positioning mechanism, significantly improve detection efficiency by the detection device, adopt weight gravity as standard force source, pass through the guide system of fixed pulley and fine line, vertical gravity is converted into horizontal pull, force value error is controllable, satisfy high-precision detection demand.

Description

Technical Field

[0001] This utility model proposes a device for detecting the fixing force of locks, which belongs to the field of lock production and testing technology. Background Technology

[0002] After production, locks need to be tested for their holding force to ensure their quality and safety. With the increasing prevalence of high-precision locks, traditional testing methods suffer from low accuracy, complex operation, low efficiency, and even damage to the locks during the testing process. Therefore, a more efficient and accurate lock holding force testing device is needed. Utility Model Content

[0003] To address the technical problems existing in the prior art, this utility model proposes a lock fixing force detection device to improve the detection accuracy and efficiency of lock fixing force. The technical features adopted are as follows:

[0004] A lock fixing force detection device includes a turntable positioning mechanism, an operating table, and a support frame connecting the two. A lifting cylinder mechanism is installed on the support frame, and a detection and reset mechanism is connected below the lifting cylinder mechanism. The turntable positioning mechanism has 5-10 detection stations evenly distributed. The top of the detection and reset mechanism is a horizontal carrier plate. Below the horizontal carrier plate are a sliding groove and a matching slide rail. Below the slide rail is a fixing block, and a terminal block is provided on the outside of the fixing block. At both ends of the fixing block are a first extension block and a second extension block. A push head is provided on the outside of the first extension block, and a limiting hole is provided at the lower end of the second extension block. At both ends of the horizontal carrier plate are a first vertical carrier plate and a second vertical carrier plate. A pulley is provided at the bottom of the first vertical carrier plate, and a weight is provided below the pulley. The weight is fixed to the terminal block by passing a thin thread through the pulley. A reset cylinder is provided on the second vertical carrier plate. The piston rod of the reset cylinder passes through the limiting hole, and the end of the piston rod is limited by the limiting hole.

[0005] Furthermore, the turntable positioning mechanism includes a turntable and a turntable drive mechanism. The turntable consists of a fixed plate and a movable plate, and the inspection station is set on the movable plate.

[0006] Furthermore, the turntable drive mechanism includes a motor, coupling, and reducer assembled and connected below the turntable. A bearing fixture is set at the inspection station above the turntable. Stops are set in front of and behind the bearing fixture, and fixture clamps are set on the left and right sides. The power signal terminal of the motor is connected to a PLC control device.

[0007] Furthermore, the lifting cylinder mechanism includes a lifting cylinder, a guide rod, and a floating joint. The lifting cylinder is mounted on a cylinder platform connected to the support frame, and the cylinder platform and the support frame are fixedly connected by a first connecting plate.

[0008] Furthermore, the end of the lifting cylinder is a threaded joint, which is fixedly connected to the first connecting block by bolts, and the first connecting block is fixedly connected to the second connecting plate in the vertical direction.

[0009] Furthermore, the cylinder platform is provided with an extended guide plate, and the guide plate is provided with a guide rod parallel to the lifting cylinder. The end of the guide rod is connected to a floating joint, and the end of the floating joint is fixed with a second connecting block connected to the second connecting plate. The second connecting block is connected to the second connecting plate by bolts.

[0010] Furthermore, the horizontal carrier plate is fixedly connected to the second connecting plate via a right-angle connector.

[0011] Furthermore, the terminal block extends in the direction of the top of the pulley recess.

[0012] Furthermore, a fixed pressure column is provided on the outer side of the horizontal carrier plate, and the fixed pressure column is located above the testing station.

[0013] The beneficial effects of this utility model are as follows:

[0014] By employing a collaborative working mode of a turntable positioning mechanism, a lifting cylinder mechanism, and a detection and reset mechanism, the lock fixing force detection process is fully automated, reducing manual intervention and significantly improving detection efficiency. Using weights as the standard force source, the vertical gravity is converted into horizontal tension through a guide system composed of fixed pulleys and thin lines. The force error is controllable, meeting the requirements of high-precision detection. A single device can replace 2-3 inspection workers, reducing the company's labor costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structural layout of this utility model.

[0017] Figure 3 This is a schematic diagram of the horizontal cross-section of this utility model.

[0018] Figure 4 This is a schematic diagram of the detection and reset mechanism of this utility model. Figure 1 .

[0019] Figure 5 This is a schematic diagram of the detection and reset mechanism of this utility model. Figure 2 .

[0020] Figure 6 This is a schematic diagram of the detection and reset mechanism of this utility model. Figure 3 .

[0021] Figure 7 This is a schematic diagram of the lifting cylinder mechanism of this utility model.

[0022] 1. Turntable positioning mechanism; 2. Operating table; 3. Support frame; 4. Lifting cylinder mechanism; 5. Detection and reset mechanism;

[0023] 11. Turntable; 12. Turntable drive mechanism; 13. Fixed plate; 14. Movable plate; 15. Inspection station; 16. Bearing fixture; 161. Stop block; 162. Fixture jig; 41. Lifting cylinder; 42. Threaded joint; 43. Guide rod; 44. Floating joint; 45. First connecting block; 46. Second connecting plate; 47. Second connecting block; 48. Cylinder platform; 481. Guide plate;

[0024] 49, First connecting plate; 471, Fixing block; 472, First extension block; 473, Second extension block; 474, First vertical carrier plate; 475, Second vertical carrier plate; 51, Horizontal carrier plate; 511, Right-angle connector; 52, Reset cylinder; 53, Weight;

[0025] 54, push head; 55, slide groove; 56, slide rail; 60, pulley; 62, terminal block; 63, fixing pressure post. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the embodiments.

[0027] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and "vertical" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, in the description of this utility model, unless otherwise stated, "multiple", "multiple groups", and "multiple roots" mean two or more.

[0030] Unless otherwise specified, the materials, instruments and methods used in the following embodiments are all conventional materials, instruments and methods in the art and can be obtained through commercial channels.

[0031] This lock fixing force testing device adopts a modular design, mainly consisting of a turntable positioning mechanism 1, an operating table 2, a support frame 3, a lifting cylinder mechanism 4, and a testing and reset mechanism 5. During operation, the turntable positioning mechanism transports the lock to be tested to the testing station. The lifting cylinder mechanism drives the testing and reset mechanism to descend to the testing position, and the gravity of the weights is used to apply a tensile force to test the lock's fixing force, thus achieving precise testing of the lock's fixing force.

[0032] The turntable positioning mechanism 1 includes a turntable drive mechanism 12 and a turntable 11. The turntable 11 consists of a fixed plate 13 and a movable plate 14. The inspection station 15 is set on the movable plate 14. The turntable drive mechanism includes a motor, coupling, and reducer assembled and connected below the turntable. Specifically, it consists of a servo motor, a precision planetary reducer, and a flexible coupling to ensure the turntable positioning accuracy is ±0.05°. 5-10 bearing fixtures 16 are set at the inspection station 15 above the turntable 11, with 6-8 being common. The bearing fixtures 16 are aluminum alloy bases with hard anodized surfaces. Adjustable stops 161 are set at the front and rear of the bearing fixtures for axial positioning of the lock. The bearing fixtures are located on the left and right sides... The device is equipped with a tooling fixture 162, whose grippers are cylindrical. The turntable is also equipped with a turntable positioning device, which is directly connected to the central axis of the turntable to monitor the absolute position of the turntable in real time. The turntable positioning device is a photoelectric sensor. In this embodiment, a high-precision photoelectric encoder (SICK SFM60-HZZ0-S03) is used. The operation process is as follows: the operator places the lock on the supporting tooling, the bottom surface of the lock contacts the stop block, and the two sides are automatically clamped by pneumatic clamps. The positioning accuracy is confirmed by the photoelectric encoder. The servo motor drives the turntable to rotate the detection station to the position to be detected. The power signal terminal of the motor is connected to the PLC control device. The dwell time of each detection station is 23 seconds.

[0033] The lifting cylinder mechanism 4 includes a lifting cylinder 41, a guide rod 43, and a floating joint 44. The lifting cylinder 41 is mounted on a cylinder platform 48 connected to the support frame 3. The cylinder platform 48 and the support frame 3 are fixedly connected by a first connecting plate 49. The top of the first connecting plate 49 is connected to the cylinder platform 48, and the bottom of the first connecting plate 49 is connected to the support frame 3. The end of the lifting cylinder 41 is a threaded joint 42, which is fixedly connected to a first connecting block 45 by bolts. The first connecting block 45 is fixedly connected to a second connecting plate 46 in the vertical direction.

[0034] The cylinder platform 48 is provided with an extended guide plate 481. The guide plate 481 has a guide rod 43 arranged parallel to the lifting cylinder 41. A floating joint 44 is connected to the end of the guide rod 43. A second connecting block 47, which is connected to the second connecting plate 46, is fixed to the end of the floating joint 44. The second connecting block 47 and the second connecting plate 46 are connected by bolts. The piston rod of the lifting cylinder is connected to the floating joint through the second connecting plate and the second connecting block. The floating joint eliminates installation errors, ensures uniform force distribution, and ensures the linkage between the lifting cylinder and the guide rod, thus promoting the smooth operation of the lifting cylinder mechanism. In addition, the lifting cylinder 41 is equipped with a magnetic induction switch with a response time of <5ms. The signal terminal of the magnetic induction switch is connected to a PLC control device. The PLC controls a proportional solenoid valve through a PWM signal to achieve adjustable cylinder speed. In this embodiment, the PLC control device is a Siemens PLC.

[0035] The detection reset mechanism 5 includes a horizontal carrier plate 51, a reset cylinder 52, a weight 53, and a pusher 54. The horizontal carrier plate 51 is located at the top of the detection reset mechanism. The horizontal carrier plate 51 is fixedly connected to the second connecting plate 46 through a right-angle connector 511. The horizontal carrier plate 51 has a first vertical carrier plate 474 and a second vertical carrier plate 475 at both ends. The horizontal carrier plate 51, the first vertical carrier plate 474, and the second vertical carrier plate 475 are high-strength aluminum alloy carrier plates. A fixing column 63 is provided on the outside of the horizontal carrier plate 51. The fixing column is above the detection station 15. The fixing column is used to press the lock to be tested after the lifting cylinder mechanism descends, to prevent the lock from moving during the test.

[0036] A sliding groove 55 and a sliding rail 56 matching the sliding groove 55 are provided below the horizontal carrier plate 51. A fixing block 471 is provided below the sliding rail 56. A terminal post 62 is provided on the outside of the fixing block 471. A first extension block 472 and a second extension block 473 are provided at both ends of the fixing block 471. A push head 54 is provided on the outside of the first extension block 472. A limiting hole is provided at the lower end of the second extension block 473.

[0037] A pulley 60 is installed at the bottom of the first vertical carrier plate 474. Below the pulley 60, a weight 53 is installed. The weights are selectable from 0.5 to 20 kg. The weight 53 is fixed to a terminal block 62 via a thin thread passing through the pulley 60. The terminal block 62 extends from the top of the recess of the pulley 60. The pulley 60 is a precision bearing pulley with a friction coefficient of less than 0.01. The thin thread is made of high-strength nylon. A reset cylinder 52 is installed on the second vertical carrier plate 475. The piston rod of the reset cylinder 52 passes through a limiting hole, and the end of the piston rod is positioned relative to the limiting hole.

[0038] The control panel is surrounded by a closed transparent protective cover. A safety light curtain is installed at the opening of the loading area. An emergency stop button is also installed on the outside of the protective cover. In addition, the same fixing force detection device can be installed above the idle turntable detection station to realize multi-station detection, speed up the detection efficiency and reduce the detection space.

[0039] The working process of the lifting cylinder mechanism and the detection reset mechanism is as follows: the lifting cylinder descends to the detection position, aligning the pusher head with the lock detection position; the reset cylinder pushes the piston rod forward, and the test weight moves the terminal block through a thin wire, applying a pulling force of the weight to the pusher head. In this embodiment, a 1KG weight is used to accurately control the fixing force of the lock under test. The selection of the weight set can meet different fixing force testing environments. The locking force is judged by observing whether the lock plate can be pressed down completely. After the test is completed, the PLC controls the reset cylinder to pull back the piston rod, resetting the weight and pusher head, and the lifting cylinder returns to the initial position. After using this lock fixing force testing device, the testing efficiency is increased by 400%, the stable weight pulling force significantly improves the testing accuracy, and the labor cost is reduced by 60%.

[0040] This invention does not improve any software programs or methods. This invention only designs the structure of the detection device. The methods or software programs involved in the debugging and control of the PLC control device and sensors are all based on existing methods or software program design books, manuals or product manuals by those skilled in the art, combined with the functions involved in the principles and effects of this invention, and can be implemented by writing their own programs.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A device for detecting the fixing force of a lock, comprising a turntable positioning mechanism (1), an operating table (2), and a support frame (3) connecting the two, characterized in that, A lifting cylinder mechanism (4) is installed on the support frame (3). A detection and reset mechanism (5) is connected below the lifting cylinder mechanism (4). Five to ten detection stations (15) are evenly distributed on the turntable positioning mechanism (1). The top of the detection and reset mechanism (5) is a horizontal carrier plate (51). A slide groove (55) and a slide rail (56) matching the slide groove (55) are provided below the horizontal carrier plate (51). A fixing block (471) is provided below the slide rail (56). A terminal block (62) is provided on the outside of the fixing block (471). A first extension block (472) and a second extension block (473) are provided at both ends of the fixing block (471). The first extension block (472) has a pusher (54) on its outer side, and the second extension block (473) has a limiting hole at its lower end. The horizontal carrier plate (51) has a first vertical carrier plate (474) and a second vertical carrier plate (475) at both ends. The first vertical carrier plate (474) has a pulley (60) at its bottom end, and a weight (53) is provided below the pulley (60). The weight (53) is fixed to the terminal block (62) by passing a thin wire through the pulley (60). The second vertical carrier plate (475) has a reset cylinder (52). The piston rod of the reset cylinder (52) passes through the limiting hole, and the end of the piston rod is limited by the limiting hole.

2. The lock fixing force detection device according to claim 1, characterized in that, The turntable positioning mechanism (1) includes a turntable (11) and a turntable driving mechanism (12). The turntable (11) consists of a fixed plate (13) and a movable plate (14). The detection station (15) is set on the movable plate (14).

3. The lock fixing force detection device according to claim 2, characterized in that, The turntable drive mechanism (12) includes a motor, coupling, and reducer assembled and connected below the turntable. A bearing fixture (16) is provided at the inspection station (15) above the turntable (11). Stops (161) are provided in front and behind the bearing fixture, and fixtures (162) are provided on the left and right sides. The power signal terminal of the motor is connected to a PLC control device.

4. The lock fixing force detection device according to claim 1, characterized in that, The lifting cylinder mechanism (4) includes a lifting cylinder (41), a guide rod (43), and a floating joint (44). The lifting cylinder (41) is installed on a cylinder platform (48) connected to the support frame (3). The cylinder platform (48) and the support frame (3) are fixedly connected by a first connecting plate (49).

5. The lock fixing force detection device according to claim 4, characterized in that, The end of the lifting cylinder (41) is a threaded joint (42), which is fixedly connected to the first connecting block (45) by bolts. The first connecting block (45) is fixedly connected to the second connecting plate (46) in the vertical direction.

6. The lock fixing force detection device according to claim 5, characterized in that, The cylinder platform (48) is provided with an extended guide plate (481), and the guide plate (481) is provided with a guide rod (43) parallel to the lifting cylinder (41). The end of the guide rod (43) is connected to a floating joint (44), and the end of the floating joint (44) is fixed with a second connecting block (47) connected to the second connecting plate (46). The second connecting block (47) and the second connecting plate (46) are connected by bolts.

7. The lock fixing force detection device according to claim 5, characterized in that, The horizontal carrier plate (51) is fixedly connected to the second connecting plate (46) by a right-angle connector (511).

8. The lock fixing force detection device according to claim 1, characterized in that, The terminal (62) extends in the direction of the top of the recess of the pulley (60).

9. The lock fixing force detection device according to claim 1, characterized in that, The horizontal carrier plate (51) is provided with a fixed pressure column (63) on the outside, which is located above the testing station (15).

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