A driver self-locking force testing device and testing method

Abstract

The present invention discloses a driver self-locking force testing device and testing method, which includes: a frame, on which a bracket is provided; an adjustment component for adjusting the installation position of the driver; a simulation component connected to the driving push rod of the driver for simulating the load; a rotatable support rod provided on the bracket to provide support for the simulation component; a weight block inserted into the fixed rod of the simulation component; and a pressure gauge connected to the simulation component; the simulation component includes a pressure sensor, a holder, and a rotatable rotating bracket, the mounting seat on one end of the pressure sensor is connected to the driver driving push rod, and the other end is installed on the holder, and the holder is fixed to one end of the rotating bracket by a pin. The present invention simulates the load condition of the intelligent bed driver in real conditions through the simulation component, tests the self-locking performance of the driver, and the test result is more real and reliable.

Description

Technical Field

[0001] The present invention relates to a testing device, in particular to a testing device for testing the self-locking force of a driver. In particular, the present invention also provides a method for testing using the device. Background Art

[0002] With the improvement of people's living standards, electric beds are widely used. The general structure of an electric bed includes a reversible bed board, a bed frame and a driving motor, especially a push rod motor, which pushes the bed board by extending or contracting the motor driving rod to make the bed board rise or fall, and can realize the lifting and lowering of the head, hip or foot bed board by setting multiple motors respectively, meeting the needs of changing the posture of the human body in bed.

[0003] The performance of the driver directly affects the performance of the electric bed. Therefore, the self-locking performance of the driver needs to be tested before the driver is assembled. The existing technology usually uses a vertical load for testing, which cannot simulate the actual situation of the driver on the smart bed. The test results will be biased and the accuracy of the test needs to be improved. Summary of the invention

[0004] In order to solve the problems and shortcomings in the prior art, the present invention provides a driver self-locking force testing device and a testing method, which can more realistically simulate the actual force of the driver on the bed, thereby making the test more accurate.

[0005] In one aspect, the present invention provides a driver self-locking force testing device, which comprises:

[0006] A frame, on which a plurality of brackets for providing support are arranged;

[0007] An adjustment assembly for adjusting the mounting position of the driver;

[0008] a simulation component connected to a driving push rod of the actuator for simulating a load;

[0009] A rotatable support frame disposed on the bracket to provide support for the simulation component;

[0010] A weight block is placed on the simulated component; and

[0011] Force display connected to the pressure sensor of the analog component.

[0012] Furthermore, the simulation component is used to simulate the stress condition of the smart bed driver, and includes a pressure sensor, a socket, and a rotatable rotating bracket. The mounting socket on one end of the pressure sensor is connected to the driver driving push rod, and the other end is installed on the socket. The socket is fixed to one end of the rotating bracket by a pin. The rotating bracket provides support for the weight block, and the weight block is inserted into the fixed rod of the rotating bracket.

[0013] Among them, the rotating bracket is a right-angled triangle structure, a support frame is fixed at the intersection of the two sides of the right angle, the two ends of the support frame are connected to the support bearings on the middle bracket of the frame, and a reinforcement plate is arranged between any two sides.

[0014] Furthermore, the adjustment assembly includes a fixed tailstock with a mounting hole and an adjustable slide rail that can adjust the mounting position of the fixed tailstock. The adjustable slide rail is arranged at the bottom of the frame, and a fixing hole is opened on the adjustable slide rail. The fixed tailstock is fixed to the adjustable slide rail by a pin.

[0015] Furthermore, fixing holes are provided at the top end of the driving push rod of the driver and the tail end of the driver. The driving push rod is inserted into the mounting seat of the pressure sensor and fixed by a pin. The mounting hole at the tail end of the driver corresponds to the fixing hole on the fixed tail seat and is fixed by inserting a pin.

[0016] According to the installation size of the driver to be tested, adjust the position of the fixed tailstock on the adjustable slide rail, insert pins at both ends of the driver to connect so that the driver can be installed on the equipment with the smallest size.

[0017] Preferably, the rotating bracket is allowed to rotate within an angle range of 5 to 10 degrees during testing.

[0018] Furthermore, the pressure sensor is connected to a force display, which can display the real-time output force of the driver to determine whether the output force of the driver reaches the rated value.

[0019] Another aspect of the present invention further provides a method for testing the self-locking force of a driver according to the testing device, comprising:

[0020] S1: Connect and fix the driver and power it on. The driver push rod keeps the angle between the rotating bracket and the horizontal direction at 5°;

[0021] S2: Load a weight block on the rotating bracket, fine-tune the driver and make the angle of the rotating bracket rise and remain at 5-10 degrees, and record the current angle of the rotating bracket;

[0022] S3: Maintain static pressure for 1-2 hours and measure whether the angle change of the rotating bracket exceeds 3°;

[0023] S4: loop through steps S2 and S3, loading the weight block step by step. If the current angle measured by the rotating bracket changes by more than 3°, it is determined that the driver cannot self-lock under this force value and the test is terminated. If the added weight block force reaches the maximum allowable load value, the test is terminated.

[0024] Furthermore, if it is determined in step S3 that the current angle of the rotating bracket changes by more than 3°, the self-locking force test of the driver fails, the driver cannot self-lock within the allowable load range, and the test ends.

[0025] Preferably, the number of cyclic tests in step S4 is 3-5 times, which can be specifically determined according to the allowable load range value of the driver.

[0026] Preferably, the weight block is a 250N weight block, and at least one weight block is added each time. The specifications of the weight blocks can be replaced as needed.

[0027] Preferably, the force value of the weight block loaded for the first time in step S2 is the rated thrust value of the driver. For example, if the rated thrust of the driver is 3000N and the maximum allowable load value is 10000N, the weight block is loaded starting from 3000N, and the weight is increased step by step for 1-2 hours each time until the driver cannot self-lock, or reaches the upper limit of the device 10000N, then the test is terminated.

[0028] If the driver cannot self-lock under the rated thrust, the driver is judged to be unqualified. If the driver cannot self-lock within the maximum allowable load range, the self-locking force is unqualified, otherwise it is qualified.

[0029] The angle test method of the rotating bracket in the present method can be an automatic test or a manual test.

[0030] The present invention can more realistically simulate the actual stress conditions of the driver on the bed, simulate the bed frame by simulating components and simulate the load body weight by using weight blocks, thereby making the test more accurate, and the test method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The following drawings describe the preferred embodiments in an exemplary manner, and other features of the present invention will be apparent.

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a rotating bracket in an ascending state according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the process of the self-locking force testing method of the present invention;

[0035] Figure 4 The figure is a flow chart of another embodiment of the self-locking force testing method of the present invention.

[0036] In the figure: 1-frame, 2-adjustable slide rail, 3-fixed tailstock, 4-pressure sensor, 5-cage, 6-rotating bracket, 7-support frame, 8-weight block, 9-force display, 10-driver, 11-bracket, 60-fixed rod, 61-reinforcement plate, 62-fixed hole, 71-support bearing, 100-driver push rod. DETAILED DESCRIPTION

[0037] The following embodiments are preferred embodiments of the present invention. Those skilled in the art can easily make various combinations or modifications based on the embodiments. Therefore, the following embodiments are not used to limit the present invention, but are only used to further describe the present invention.

[0038] like Figure 1 The embodiment shown is a device for testing the self-locking force of a driver, comprising:

[0039] A frame 1, on which a plurality of brackets 11 for providing support are arranged; an adjustment component for adjusting the installation position of the driver 10;

[0040] A simulation component of a simulated smart bed connected to a driving push rod of the driver 10;

[0041] A rotatable support frame 7 provided on the support 11 to provide support for the simulation component;

[0042] A weight block 8 is placed on the simulation component; and

[0043] A force display 9 is connected to the pressure sensor 4 of the analog component.

[0044] Furthermore, the simulation component is used to simulate the stress condition of the smart bed driver, which includes a pressure sensor 4, a holder 5, and a rotating bracket 6. The mounting seat on one end of the pressure sensor 4 is connected to the driver push rod, and the other end is installed on the holder 5. The holder 5 is connected to the rotating bracket 6 through a pin. The rotating bracket 6 provides support for the weight block 8, and the weight block 8 is inserted into the fixed rod 60 at one end of the rotating bracket 6.

[0045] The rotating bracket is a right triangle structure, with a support frame 7 fixed at the intersection of the two sides of the right angle. Both ends of the support frame 7 are connected to the support bearing 71 on the middle bracket 11 of the frame, and a reinforcing plate 61 can be set between any two sides.

[0046] Furthermore, the rotating bracket is provided with a plurality of fixing holes 62 cooperating with the fixed socket on one side, and the pin passes through the socket 5 to be connected with the rotating bracket 6. The socket 5 can be connected to different fixing holes 62 as needed, and the testing requirements of the drivers at different positions on the smart bed can be realized by changing the torque of the driver push rod 100.

[0047] like Figure 2 In the illustrated embodiment, the rotating bracket 6 is fixedly connected to the supporting frame 7 , and the rotation of the rotating bracket is achieved by the rotation of the supporting frame 7 in the supporting bearing 71 .

[0048] Optionally, the rotating bracket 6 and the supporting frame 7 are rotatably connected, and a shaft sleeve for the supporting frame to pass through is provided on the supporting frame or the rotating bracket. In this case, the supporting frame can be directly fixed on the bracket, eliminating the two supporting bearings on the bracket.

[0049] Furthermore, the adjustment component includes a fixed tailstock 3 with a mounting hole and an adjustable slide rail 2 whose mounting position can be adjusted. The adjustable slide rail 2 is arranged at the bottom of the frame 1. A fixing hole is opened on the adjustable slide rail 2. The fixed tailstock 3 is fixed to the adjustable slide rail 2 by a pin.

[0050] Optionally, the driver push rod is engraved with scales or has a scale bar attached thereon to facilitate recording of marking position information.

[0051] Furthermore, the top and tail ends of the driver 10 are provided with fixing holes, the top end of the driver push rod 100 is inserted into the mounting seat of the pressure sensor 4 and fixed by a pin, and the mounting hole at the tail end of the driver 10 corresponds to the fixing hole on the fixed tail seat 3 and is fixed by inserting a pin.

[0052] According to the installation size of the driver to be tested, the position of the fixed tailstock 3 on the adjustable slide rail 2 is adjusted, and pins are inserted at both ends of the driver so that the driver can be installed on the equipment with the minimum size to meet the installation requirements of drivers of different specifications.

[0053] Furthermore, the pressure sensor measures the output force of the driver in real time and displays the output force on the force display in real time, so as to adjust the weight block or fine-tune the output force of the driver and determine whether the driver has reached the rated output force.

[0054] Furthermore, the pressure sensor can be selected into different types as needed, as long as it can meet the pressure test requirements.

[0055] Preferably, during testing, the rotating bracket preferably rotates at an angle of 5 to 10 degrees.

[0056] Preferably, the specification of the load block is 250N, and each time a load block is added, the angle of the rotating bracket is maintained at 5-10 degrees, and the total of the loaded load blocks is not greater than the maximum allowable load of the driver.

[0057] The rotation angle of the rotating bracket is measured manually by an instrument, and can be measured by an angle tester.

[0058] During the test, the driver 10 is adjusted and fixed on the fixed tailstock 3, the driver push rod of the driver 10 is inserted into the mounting seat of the pressure sensor 4, the holder 5 connected to the pressure sensor is connected to the rotating bracket 6, and the weight blocks 8 are placed step by step on the fixed rod 81 at one end of the rotating bracket 6 according to the specifications of the driver. Each time the weight block 8 is added, the current angle of the rotating bracket 6 is measured and the angle of the rotating bracket 6 with the horizontal direction is maintained within the range of 5-10 degrees. If the current angle of the rotating bracket changes by more than 3 degrees compared with the last time during the test, it means that the self-locking ability of the driver is poor and it cannot self-lock when a certain pressure is reached.

[0059] Increase the load step by step, such as adding 1000N load blocks each time, that is, adding 4 250N load blocks, and statically press for 1 hour each time. Observe whether the scribe mark changes. At the same time, measure whether the angle change exceeds 3°, so as to determine the self-locking ability of the driver.

[0060] If the actuator push rod cannot maintain a certain position under the specified pressure, has obvious displacement and the angle changes by more than 3°, it is considered that the actuator cannot self-lock above this force value.

[0061] It should be noted that the shape of the rotating bracket described in the present invention can be changed as needed, as long as it can satisfy the force conversion and simulate the lifting of the bed board, and no further detailed description will be given here.

[0062] like Figure 3 As shown, the present invention also provides a method for testing the self-locking force of a driver according to the above device, comprising:

[0063] S1: Connect and fix the driver and power it on. The driver push rod keeps the angle of the rotating bracket at 5 degrees.

[0064] S2: Load the weight block on the rotating bracket, fine-tune the drive and make the angle of the rotating bracket rise and remain at 5-10 degrees, and mark the position of the drive push rod;

[0065] S3: Maintain static pressure for 1-2 hours, observe whether the position mark changes, and measure whether the angle change exceeds 3°. If the angle change of the rotating bracket does not exceed 3°, proceed to step S2;

[0066] S4: loop through steps S2 and S3, load the weight block step by step, observe whether the position mark changes, and measure whether the angle change exceeds 3°, so as to determine the self-locking ability of the driver.

[0067] Furthermore, the angle of rotating the bracket in step S1 is an angle with respect to the horizontal direction.

[0068] Preferably, the force value of the weight block loaded for the first time in step S2 is the rated thrust value of the driver.

[0069] Furthermore, in step S3, if the current angle of the rotating bracket changes by more than 3° from the angle in step S2, the self-locking force test of the driver fails, the driver cannot self-lock under the maximum allowable load, and the test ends.

[0070] Furthermore, the angle of the rotating bracket is an angle formed with the horizontal direction.

[0071] Furthermore, the position mark of the driver push rod can be directly drawn on the driver push rod or on a driver push rod with a scale. The scale sticker with a scale mark can also be directly attached to the driver push rod for easy recording. If the position mark changes in step S3, the current angle of the rotating bracket is measured to calculate the angle change. If the position mark does not change, the driver can self-lock under the current force value.

[0072] By adopting the position marking method, it is possible to quickly determine whether the self-locking force of the driver is qualified at the current pressure value.

[0073] Preferably, the number of cycle tests in step S4 is determined according to the rated thrust of the driver, such as the number of cycle tests in step S4 of the driver is 3-5 times.

[0074] Preferably, the weight block is a 250N weight block, and at least one weight block is added each time. Each time a weight block is added, the current angle of the rotating bracket must be remeasured to ensure that the current angle is within the range of 5-10 degrees.

[0075] In an application example, the self-locking force of a push rod type driver applied to an intelligent bed is tested. The rated load is 5000N and the maximum allowable load is 10000N. The test process is as follows:

[0076] S1: Connect and fix the driver and power it on. The driver push rod keeps the angle of the rotating bracket at 6 degrees.

[0077] S2: Load a 5000N weight block on the rotating bracket, fine-tune the driver and keep the angle of the rotating bracket at 5-10 degrees, record the current angle of the rotating bracket and mark the position of the driver push rod;

[0078] S3: Maintain static pressure for 1 hour, observe whether the position mark changes, and measure whether the angle change of the rotating bracket exceeds 3°. If the angle change of the rotating bracket does not exceed 3°, proceed to step S4;

[0079] S4: loop through steps S2 and S3. based on the load block loaded in step S2, load the load block step by step and record the current angle of the rotating bracket. add 1000N of load block each time. if the current angle measured by the rotating bracket changes by more than 3°, determine that the drive cannot self-lock under this force value and end the test. end the test if the added load block force reaches the maximum allowable load value of 10000N.

[0080] If during the test, the angle of the rotating bracket changes by more than 3 degrees, it is considered that the driver's self-locking force cannot self-lock under this force value. For example, when the load is 5000N, the initial measured angle between the rotating bracket and the horizontal direction is 9 degrees. If it is measured again after 1 hour, if the angle of the rotating bracket changes to 8 degrees, the driver's self-locking ability is qualified at the force value of 5000N. If the angle is measured to be 5 degrees after 1 hour, the driver cannot self-lock under this force value.

[0081] like Figure 4 As shown, for a driver whose maximum allowable load value cannot be determined, the present invention can measure the maximum allowable load value of the driver by continuously adding load blocks step by step and measuring whether the angle change of the rotating bracket exceeds 3°, that is, the test is not limited to the maximum allowable load value cycle.

[0082] Optionally, in step S2, it is only necessary to keep the angle of the rotating bracket to the horizontal direction at 5-10 degrees, and it is not necessary to increase the angle of the rotating bracket. That is, the rotating bracket can be kept at a certain angle and the load blocks can be gradually increased for testing.

[0083] The invention is suitable for testing a push rod type driver, especially a driver used in an electric bed.

[0084] It should be noted that the specifications of the weight block can be designed according to needs to be suitable for drivers of different specifications.

[0085] The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention in any way. All modifications and combinations based on the present invention are within the protection scope of the present invention.

Claims

1. A driver self-locking force testing device, characterized in that: include: A frame, on which a plurality of brackets for providing support are arranged; An adjustment assembly for adjusting the mounting position of the driver; a simulation component connected to the actuator push rod of the actuator for simulating a load; A rotatable support frame disposed on the bracket to provide support for the simulation component; A weight block is placed on the simulation component; as well as a force display connected to a pressure sensor of the analog component; The simulation component is used to simulate the force of the intelligent bed driver, which includes a pressure sensor, a card seat, and a rotatable rotating bracket. One end of the pressure sensor is connected to the driver driving push rod, and the other end is installed on the card seat. The load block is plugged into the fixed rod of the rotating bracket; The rotating bracket is a right-angled triangle structure, one side of which is provided with a plurality of fixing holes that cooperate with the fixed socket. The pin passes through the socket and is connected to the rotating bracket. The socket is connected to the fixing hole. A rotatable support frame is fixed at the intersection of the two sides of the right angle. The two ends of the rotatable support frame are connected to the support bearings on the middle bracket of the frame. The rotating bracket is provided with a shaft sleeve for the rotatable support frame to pass through. The rotating bracket and the rotatable support frame are fixedly connected, and the rotation of the rotating bracket is realized by the rotation of the rotatable support frame in the support bearing.

2. A driver self-locking force testing device according to claim 1, characterized in that: The rotating bracket has a reinforcing plate disposed between any two sides thereof.

3. A driver self-locking force testing device according to claim 2, characterized in that: The rotating bracket has a plurality of fixing holes on one side thereof for fixing the clamping seat, and a fixing rod for inserting the weight block is also provided on the rotating bracket.

4. A driver self-locking force testing device according to claim 1, characterized in that: The rotating bracket is allowed to rotate within an angle range of 5 to 10 degrees during testing.

5. The driver self-locking force testing device according to claim 1, characterized in that: The adjustment assembly comprises a fixed tailstock with a mounting hole and an adjustable slide rail which can adjust the mounting position of the fixed tailstock. The adjustable slide rail is arranged at the bottom of the frame, has a fixing hole, and the fixed tailstock is fixed to the adjustable slide rail by a pin.

6. A driver self-locking force testing device according to any one of claims 1 to 5, characterized in that: The driver has a hole structure at its top and end. The top of the driver is inserted into the mounting seat of the sensor and connected by pins. The hole position at the end of the driver is aligned with the hole position on the fixed tailstock and connected by interlaced pins.

7. A method for testing the self-locking force of a driver according to the testing device according to any one of claims 1 to 6, comprising: S1: Connect and fix the driver and power it on. The driver push rod makes the angle of the rotating bracket rise 5° from the horizontal direction. S2: Load a weight block on the rotating bracket, fine-tune the driver and keep the angle of the rotating bracket at 5-10 degrees, and record the current angle of the rotating bracket; S3: Maintain static pressure for 1-2 hours and measure whether the angle change of the rotating bracket exceeds 3°; S4: loop through steps S2 and S3, loading the weight block step by step. If the current angle measured by the rotating bracket changes by more than 3°, it is determined that the driver cannot self-lock under this force value and the test is terminated. If the added force value of the weight block reaches the maximum allowable load value, the test is terminated.

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