A device for measuring linearly moving load

Abstract

The utility model provides a kind of device for measuring linear motion load, including pedestal, linear drive mechanism, force sensor and quick docking assembly, linear drive mechanism is installed on pedestal, force sensor is installed in the output end of linear drive mechanism, quick docking assembly is located in the end of force sensor away in linear drive mechanism, and force sensor and quick docking assembly are moved along the length direction of pedestal and are positioned by linear drive mechanism activity;Quick docking assembly includes the first docking block and the second docking block being connected with each other, the first docking block is fixedly connected on linear drive mechanism, lock slot is provided on the first docking block along first direction, lock tongue is provided on the second docking block along first direction, and the second docking block is arranged by being inserted into the lock slot on the first docking block along first direction by lock tongue.This application makes the lock tongue on the second docking block insert into lock slot during installation, i.e., the connection of force sensor and measured piece can be completed, connection is quick, and installation time is greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of load measuring device technology, specifically to a device for measuring linear motion loads. Background Technology

[0002] Pin-type locking mechanisms are widely used in existing locking mechanisms because they have extremely high reliability requirements. If the locking is unreliable, safety accidents can easily occur. Therefore, pin-type locking mechanisms need to undergo rigorous testing before leaving the factory, including the locking force during locking and the push-pull force during operation.

[0003] Existing testing devices for linear mechanisms (pin-type locking mechanisms) generally employ linear drive mechanisms and connect to the test piece via a connecting structure. During testing, these devices use bolts for butt-and-fitting connections. This requires tightening multiple bolts sequentially, aligning them with corresponding holes. However, this process is time-consuming and labor-intensive, impacting testing efficiency.

[0004] In summary, there is an urgent need for a device for measuring linear motion loads to solve, or at least partially solve, the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a device for measuring linear motion loads, aiming to solve the technical problems of existing structures being difficult to connect and time-consuming and labor-intensive. The specific technical solution is as follows:

[0006] A device for measuring linear motion loads includes a base, a linear drive mechanism, a force sensor, and a quick-connect assembly. The base has an operating mounting end and a measuring component mounting end. The linear drive mechanism is mounted on the operating mounting end of the base, and the force sensor is mounted on the output end of the linear drive mechanism. The quick-connect assembly is located at the end of the force sensor away from the linear drive mechanism. The linear drive mechanism moves the force sensor and the quick-connect assembly along the length of the base and positions them. The quick-connect assembly includes a first docking block and a second docking block connected to each other. The first docking block is fixedly connected to the end of the force sensor away from the linear drive mechanism. The first docking block has a locking groove along a first direction, and the second docking block has a locking tongue along the first direction. The second docking block is inserted into the locking groove on the first docking block along the first direction via the locking tongue. The first direction is perpendicular to the moving direction of the linear drive mechanism.

[0007] Furthermore, the first direction is along the height direction of the quick-connect assembly.

[0008] Preferably, the linear drive mechanism includes a motor, a gear, and a rack. The motor is fixedly connected to the base, the gear is coaxially fixedly connected to the output shaft of the motor, and the rack is slidably connected to the base along its own length. The gear and rack are meshed together, and one end of the rack is fixedly connected to a force sensor.

[0009] Preferably, the linear drive mechanism further includes a slider and a slide rail, the slide rail being fixedly connected to the base; a rack being fixedly connected to the slider, the slider being slidably connected to the slide rail, and the rack being slidably connected to the base via the slider and the slide rail.

[0010] Preferably, the lock groove is a square groove arranged along the height direction, the lock tongue is arranged as a square post arranged along the height direction, and the thickness of the lock tongue along the moving direction of the linear drive mechanism is equal to the width of the square groove along the moving direction of the linear drive mechanism.

[0011] Preferably, a guide surface is provided on the first docking block, and the guide surface is located at the opening of the square groove.

[0012] Preferably, the locking groove is arranged as a T-shaped groove that runs through the height direction. The second docking block includes a screw and a disk arranged in the direction of movement of the linear drive mechanism. The disk is coaxially fixedly connected to the screw. The screw extends in a direction away from the second docking block. The disk can be inserted into or pulled out of the T-shaped groove along the height direction.

[0013] Preferably, it also includes a handle, which is disposed on the base. The first end of the handle is fixedly connected to one side of the base, and the second end of the handle passes around the top of the linear drive mechanism and is fixedly connected to the other side of the base. Two handles are provided, which are respectively arranged at both ends of the base and are arranged on the outside of the linear drive mechanism.

[0014] Preferably, it also includes rubber supports, which are disposed at the bottom of the base. Four rubber supports are disposed at the four corners of the base.

[0015] Preferably, the bottom of the base is provided with weight-reducing grooves, and multiple weight-reducing grooves are provided at intervals.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] During testing, the first and second mating blocks need to be connected. When connecting them, the first mating block is fixedly connected to the end of the force sensor furthest from the linear drive mechanism. The second mating block moves along a first direction, causing the locking tongue on the second mating block to insert into the locking groove on the first mating block along the first direction. The outer wall of the locking tongue abuts against the inner wall of the locking groove, thus locking the first and second mating blocks. To unlock them, the second mating block is simply moved in the opposite direction of the first direction, causing the locking tongue to be pulled out of the locking groove, thereby unlocking the first and second mating blocks. This quick assembly and disassembly significantly reduces installation and disassembly time during testing, improving production efficiency.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-9 The present invention will be described in further detail below. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for measuring linear motion load according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of a device for measuring linear motion load according to Embodiment 1 of this utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is an exploded view of a device for measuring linear motion load according to Embodiment 1 of this utility model;

[0024] Figure 5 yes Figure 4 Enlarged view at point B;

[0025] Figure 6 This is a schematic diagram of the bottom of the base in a device for measuring linear motion load according to Embodiment 1 of this utility model;

[0026] Figure 7 This is a schematic diagram of the overall structure of a device for measuring linear motion load according to Embodiment 2 of this utility model;

[0027] Figure 8 yes Figure 7A magnified view at point C;

[0028] Figure 9 This is an exploded view of the rapid docking component in a device for measuring linear motion load according to Embodiment 2 of this utility model.

[0029] The components include: 1. Base; 11. Weight reduction groove; 2. Linear drive mechanism; 21. Motor; 22. Gear; 23. Rack; 24. Slider; 25. Slide rail; 3. Force sensor; 4. Quick docking assembly; 41. First docking block; 411. Locking groove; 412. Guide surface; 42. Second docking block; 421. Locking tongue; 5. Test piece; 6. Handle; 7. Rubber support. Detailed Implementation

[0030] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] Example 1:

[0033] See Figures 1-6 This embodiment provides a device for measuring linear motion loads, including a base 1, a linear drive mechanism 2, a force sensor 3, and a quick-connect assembly 4. The base 1 has an operating mounting end and a measuring element mounting end. The linear drive mechanism 2 is mounted on the operating mounting end of the base 1, the force sensor 3 is mounted on the output end of the linear drive mechanism 2, and the quick-connect assembly 4 is located at the end of the force sensor 3 away from the linear drive mechanism 2. The linear drive mechanism 2 moves the force sensor 3 and the quick-connect assembly 4 along the length direction of the base 1 and positions them. The measuring element 5 is fixedly connected to the base 1 and is... The measuring component 5 is connected to the force sensor 3 and the linear drive mechanism 2 via the quick docking assembly 4. The quick docking assembly 4 includes a first docking block 41 and a second docking block 42 connected to each other. The first docking block 41 is fixedly connected to the end of the force sensor 3 away from the linear drive mechanism 2. A locking groove 411 is provided on the first docking block 41 along the first direction. A locking tongue 421 is provided on the second docking block 42 along the first direction. The second docking block 42 is inserted into the locking groove 411 on the first docking block 41 along the first direction via the locking tongue 421. The first direction is perpendicular to the moving direction of the linear drive mechanism 2.

[0034] It is understood that the linear drive mechanism 2 drives the force sensor 3 and the docking assembly to move, thereby moving the workpiece 5 under test. The force sensor 3 measures the pushing and pulling forces of the linear drive mechanism 2, thus measuring the locking force and the pushing and pulling forces of the workpiece 5 during operation. It is important to note that when measuring the pushing and pulling forces of the workpiece 5, it is necessary to ensure that the workpiece 5 moves at a constant speed under the drive of the linear drive mechanism 2. This is because the output force of the linear drive mechanism 2 is equal to the pushing and pulling force of the workpiece 5 during uniform motion. If the speed is uneven, acceleration will occur, affecting the accuracy of the measurement.

[0035] The test piece 5 is detachably connected to the base 1 by screws. Before installing the test piece 5, the second mating block 42 needs to be installed on the test piece 5 first, and then the second mating block 42 and the test piece 5 are installed on the base 1. During installation, the locking tongue 421 on the second mating block 42 is inserted into the locking groove 411 to complete the connection between the force sensor 3 and the test piece 5. The connection is quick and saves a lot of installation time. After that, the test piece 5 is fixedly connected to the base 1. It should be noted that multiple second mating blocks 42 are prepared. When one second mating block 42 is installed on one of the test pieces 5 to test the test piece 5, the operator can first install the other second mating blocks 42 on the test pieces 5 to be tested. Since no manual intervention is required during the testing process of the testing device, the operator can use the testing time to prepare the test piece in advance, saving installation time and improving efficiency. After the test is completed, another test piece 5 is installed on the test device, and then the second mating block 42 on the test piece 5 that has passed the test is removed so that the second mating block 42 can be used for the installation and testing of the test piece.

[0036] Preferably, in some embodiments, a controller is also included. The first end of the controller is connected to the force sensor 3 via a wire, the second end of the controller is connected to a power source via a wire, and the third end of the controller is connected to the linear drive mechanism 2 via a wire. It is understood that the controller controls the linear drive mechanism 2 to perform uniform linear motion. The controller has a display screen. The force sensor 3 transmits electrical signals to the controller, which processes the electrical signals and displays the curve formed by the force signal and time on the display screen. This allows the operator to visually observe the locking force of the measured part 5 and the pushing and pulling force during operation through the display screen. It should be noted that the controller is not shown in the figure.

[0037] The test piece 5 has a through hole along the height direction, and the base 1 has a threaded hole along the height direction. When installing the test piece 5, the test piece 5 is installed from top to bottom and abuts against the upper surface of the base 1. During installation, the through hole and the threaded hole are aligned and arranged. The bolt passes through the through hole and is threadedly connected to the threaded hole to lock the test piece 5 onto the base 1.

[0038] Furthermore, the first direction is along the height direction of the quick-connect assembly 4. By setting the first direction to the height direction, the locking tongue 421 can be smoothly inserted into the locking groove 411 from top to bottom for locking when the test piece 5 is installed.

[0039] Preferably, the linear drive mechanism 2 includes a motor 21, a gear 22, and a rack 23. The motor 21 is fixedly connected to the base 1, the gear 22 is coaxially fixedly connected to the output shaft of the motor 21, and the rack 23 is slidably connected to the base 1 along its own length. The gear 22 and rack 23 are meshed together, and one end of the rack 23 is fixedly connected to the force sensor 3. The force sensor 3 is an S-shaped metal component with a strain gauge attached to it. When the S-shaped metal component is subjected to force, it deforms. The strain gauge deforms accordingly, and the deformation of the strain gauge generates a voltage change. The magnitude of the force on the force sensor 3 is then detected by measuring this voltage change.

[0040] Specifically, the first end of the force sensor 3 is detachably connected to the rack 23 by a screw, and the second end of the force sensor 3 is detachably connected to the first mating block 41 by a screw.

[0041] The linear drive mechanism 2 drives the gear 22 to rotate via the motor 21, which in turn drives the rack 23 to slide relative to the base 1. The rack 23 drives the first docking block 41 to move via the force sensor 3, which in turn drives the moving end of the test piece 5 to move via the first docking block 41 and the second docking block 42. Specifically, the second docking block 42 drives the pin of the test piece 5 to move.

[0042] It should be noted that in some other embodiments of this application, the linear drive mechanism 2 may also consist of a motor 21, a lead screw, and a lead screw sleeve. The lead screw is sleeved inside the lead screw sleeve, the motor 21 is mounted on the base 1, and the output shaft of the motor 21 is coaxially sleeved with the end of the lead screw sleeve away from the lead screw. The end of the lead screw extending out of the sleeve is fixedly connected to the force sensor 3. The motor 21 drives the lead screw sleeve to rotate relative to the lead screw, thereby causing the lead screw to extend or retract into the lead screw sleeve, and then the lead screw drives the moving end of the force sensor 3, the quick docking assembly 4, and the measured part 5 to move.

[0043] Preferably, the linear drive mechanism 2 further includes a slider 24 and a slide rail 25, with the slide rail 25 fixedly connected to the base 1; a rack 23 is fixedly connected to the slider 24, and the slider 24 is slidably connected to the slide rail 25. The rack 23 is slidably connected to the base 1 via the slider 24 and the slide rail 25. Specifically, the slide rail 25 is detachably connected to the base 1 by screws and is arranged along the length of the base 1.

[0044] It can be seen that the slider 24 is slidably connected along the length of the slide rail 25. When the slider 24 slides on the slide rail 25, the rack 23 slides together with the slide rail 25 under the drive of the gear 22. It can be seen that by setting the slide rail 25 and the slider 24, the slider 24 slides along the slide rail 25, thereby guiding the rack 23 to slide along the slide rail 25, reducing the resistance to the movement of the rack 23, and improving the stability of the movement of the rack 23.

[0045] Preferably, the locking groove 411 is a square groove arranged along the height direction, and the locking tongue 421 is arranged as a square post arranged along the height direction. The thickness of the locking tongue 421 along the moving direction of the linear drive mechanism 2 is equal to the width of the square groove along the moving direction of the linear drive mechanism 2. The width of the square groove perpendicular to the moving direction of the linear drive mechanism 2 is greater than the width of the locking tongue 421. A screw is provided at the end of the second guide block away from the locking tongue 421, and the screw is threadedly connected to the measured part 5.

[0046] It is understood that when docking the first docking block 41 and the second docking block 42, the locking tongue 421 is inserted into the locking groove 411 from top to bottom, and the first docking block 41 and the second docking block 42 are docked and connected. At this time, the two sides of the locking tongue 421 along the moving direction of the linear drive mechanism 2 are tightly abutted against the inner wall of the locking groove 411, so that the linear drive mechanism can immediately transmit force to the tested part 5 whether it extends or retracts, preventing the occurrence of gaps between the locking tongue 421 and the locking groove 411, which would lead to unstable force transmission. By setting the groove width to be greater than the width of the locking tongue 421, even if the locking tongue 421 is not completely aligned with the locking groove 411 in the width direction, the locking tongue 421 can still be smoothly inserted into the locking groove 411 for locking.

[0047] Preferably, a guide surface 412 is provided on the first docking block 41, and the guide surface 412 is located at the opening of the square groove.

[0048] The guide surface 412 can be a guide slope or a circular guide surface. By setting the guide surface 412, the bolt 421 is guided so that the bolt 421 can be inserted into the lock groove 411 more smoothly for locking connection.

[0049] Preferably, it also includes a handle 6, which is disposed on the base 1. The first end of the handle 6 is fixedly connected to one side of the base 1, and the second end of the handle 6 passes around the top of the linear drive mechanism 2 and is fixedly connected to the other side of the base 1. Two handles 6 are provided, which are respectively arranged at both ends of the base 1 and are arranged on the outside of the linear drive mechanism 2.

[0050] It is known that the handle 6 facilitates the movement of the testing device. In addition, the handle 6 passes around the top of the linear drive mechanism 2 to protect the linear drive mechanism 2, force sensor 3 and quick docking assembly 4 from impacts by external objects.

[0051] Preferably, the base also includes rubber supports 7, which are disposed at the bottom of the base 1. Four rubber supports 7 are provided, and the four rubber supports 7 are respectively arranged at the four corners of the base 1. Specifically, the rubber supports 7 are detachably connected to the bottom of the base 1 by screws. The rubber supports 7 support the base 1, which on the one hand allows the base 1 to be stably supported on the ground, and on the other hand increases the friction with the ground, thereby improving the stability of the base 1 and preventing the base 1 from sliding.

[0052] The device needs to be moved when in use, so it cannot be too bulky.

[0053] Preferably, the base 1 has weight-reducing grooves 11 at its bottom, and multiple weight-reducing grooves 11 are spaced apart. By setting the weight-reducing grooves 11, the overall weight of the base 1 is reduced, making it easier to move the entire device.

[0054] Example 2:

[0055] See Figures 7-9 The difference between this embodiment and embodiment 1 is that in this embodiment, the locking groove 411 is arranged as a T-shaped groove that runs through the height direction, and the second docking block 42 includes a screw and a disk arranged in the direction of movement of the linear drive mechanism 2. The disk is coaxially fixedly connected to the screw. The screw extends in a direction away from the second docking block 42 and is used to be threaded to the test piece 5. The disk can be inserted into or pulled out of the T-shaped groove along the height direction.

[0056] It can be seen that with this configuration, when the second mating block 42 is threadedly connected to the test piece 5, the disc can be easily engaged in the T-slot for a fixed connection regardless of the angle to which the screw on the second mating block 42 is rotated, thus improving the docking speed of the first mating block 41 and the second mating block 42. It should be noted that multiple second mating blocks 42 are prepared. When one set of test pieces 5 is being tested, a spare second mating block 42 is installed on the test piece 5 to improve the speed of installation and testing.

[0057] The remaining aspects are basically the same as in Example 1, and will not be repeated here.

[0058] Example 3:

[0059] This embodiment discloses a method for measuring linear motion loads, using the aforementioned apparatus for measuring linear motion loads, and includes the following operating steps:

[0060] S1. Start the linear drive mechanism 2 and the workpiece 5 under test;

[0061] S2. Motor 21 starts to output torque, gear 22 drives rack 23 to move, converting torque into linear load. At the same time, the tested part 5 (pin-type locking mechanism) starts to work, and the moving end starts to generate thrust.

[0062] S3. When the linear drive mechanism 2 is just started, the torque output by the linear drive mechanism 2 is the largest, and the thrust of the rack 23 driven by it is greater than the thrust of the moving end of the test piece 5. The moving end of the test piece 5 cannot extend and is in a stationary state.

[0063] S4. Gradually reduce the output torque of the motor 21 in the linear drive mechanism 2. As the output torque of the motor 21 decreases, when the thrust generated by the rack 23 is less than the thrust of the moving end of the measured part 5, the rack 23 begins to be pushed by the moving end of the measured part 5. At this time, the controller adjusts the output torque of the motor 21 in real time through the motion state of the rack 23 to keep the rack 23 in a uniform motion state.

[0064] S5. When the moving end of the tested component 5 reaches the set position and locks, the measurement of the pushed-out working state of the tested component 5 is completed.

[0065] S6. When the moving end of the test piece 5 reaches the set position and locks, the linear drive mechanism 2 gradually increases the output torque of the motor 21 until the moving end of the test piece 5 in the locked state is pushed; thus completing the measurement of the locked state of the test piece 5.

[0066] S7, force sensor 3 outputs load data during the measurement process, and the measurement is completed.

[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for measuring linear motion loads, characterized in that: The system includes a base (1), a linear drive mechanism (2), a force sensor (3), and a quick docking assembly (4). The base (1) has an operating mounting end and a measuring component mounting end. The linear drive mechanism (2) is mounted on the operating mounting end of the base (1). The force sensor (3) is mounted on the output end of the linear drive mechanism (2). The quick docking assembly (4) is located at the end of the force sensor (3) away from the linear drive mechanism (2). The linear drive mechanism (2) moves the force sensor (3) and the quick docking assembly (4) along the length direction of the base (1) and positions them. The quick docking assembly (4) includes a first docking block (41) and a second docking block (42) connected to each other. The first docking block (41) is fixedly connected to the end of the force sensor (3) away from the linear drive mechanism (2). A locking groove (411) is provided on the first docking block (41) along a first direction. A locking tongue (421) is provided on the second docking block (42) along the first direction. The second docking block (42) is inserted into the locking groove (411) on the first docking block (41) along the first direction through the locking tongue (421). The first direction is perpendicular to the moving direction of the linear drive mechanism (2).

2. The device for measuring linear motion load according to claim 1, characterized in that: The first direction is along the height direction of the quick docking assembly (4).

3. The device for measuring linear motion load according to claim 1, characterized in that: The linear drive mechanism (2) includes a motor (21), a gear (22) and a rack (23). The motor (21) is fixedly connected to the base (1). The gear (22) is coaxially fixedly connected to the output shaft of the motor (21). The rack (23) is slidably connected to the base (1) along its own length direction. The gear (22) and the rack (23) are meshed together. One end of the rack (23) is fixedly connected to the force sensor (3).

4. The device for measuring linear motion load according to claim 3, characterized in that: The linear drive mechanism (2) further includes a slider (24) and a slide rail (25), the slide rail (25) being fixedly connected to the base (1); The rack (23) is fixedly connected to the slider (24), the slider (24) is slidably connected to the slide rail (25), and the rack (23) is slidably connected to the base (1) through the slider (24) and the slide rail (25).

5. A device for measuring linear motion load according to any one of claims 1-4, characterized in that: The lock groove (411) is a square groove arranged along the height direction, and the lock tongue (421) is arranged as a square post arranged along the height direction. The thickness of the lock tongue (421) along the moving direction of the linear drive mechanism (2) is equal to the width of the square groove along the moving direction of the linear drive mechanism (2).

6. The device for measuring linear motion load according to claim 5, characterized in that: A guide surface (412) is provided on the first docking block (41), and the guide surface (412) is located at the opening of the square groove.

7. A device for measuring linear motion load according to any one of claims 1-4, characterized in that: The locking groove (411) is arranged as a T-shaped groove that runs through the height direction. The second docking block (42) includes a screw and a disk arranged in the direction of movement of the linear drive mechanism (2). The disk is coaxially fixedly connected to the screw. The screw is arranged to extend away from the second docking block (42), and the disc is arranged to be inserted into or pulled out of the T-slot along the height direction.

8. A device for measuring linear motion load according to any one of claims 1-4, characterized in that: It also includes a handle (6), which is disposed on the base (1). The first end of the handle (6) is fixedly connected to one side of the base (1), and the second end of the handle (6) passes around the top of the linear drive mechanism (2) and is fixedly connected to the other side of the base (1). Two handles (6) are provided, and the two handles (6) are respectively arranged at both ends of the base (1), and the handles (6) are arranged on the outside of the linear drive mechanism (2).

9. A device for measuring linear motion load according to any one of claims 1-4, characterized in that: It also includes rubber supports (7), which are disposed at the bottom of the base (1). Four rubber supports (7) are disposed at the four corners of the base (1).

10. A device for measuring linear motion load according to any one of claims 1-4, characterized in that: The base (1) is provided with a weight reduction groove (11) at its bottom, and multiple weight reduction grooves (11) are provided at intervals.

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