A detection method of a cabinet door closer

Abstract

The application discloses a detection method of a cabinet door closer, and is based on the following detection device, which comprises a table top (1), wherein the table top (1) comprises a door closer clamping assembly, a door closer adjusting assembly and a test load assembly; and comprises the following steps: 1) firstly fixing a door closer to be detected on the door closer clamping assembly; 2) adjusting a torque adjusting screw of the door closer to be detected through the door closer adjusting assembly, so that the torque output end of the door closer to be detected drives the test load assembly to output torque, and whether the door closer to be detected reaches the torque requirement is judged according to the potential energy increase and maintenance time of the test load assembly; and the application can efficiently detect the qualified rate of the cabinet door closer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of product detection method, in particular to a detection method of a box shell door closer. BACKGROUND

[0002] The working principle of the door closer used in the box shell such as the freezer and the refrigerator is that when the door opening process is completed, the accumulated elastic potential energy is released to drive the transmission gear to rotate and output torque to the door shaft, so that the door is accurately and timely closed to the initial position. Figures 1-2 As shown in the figure, a type of small box shell door closer in the prior art often includes a torque output end and a torque adjusting screw, the torque adjusting screw is used to preset the maximum torque value of the torque output end of the door closer, and the size of the restoring force when the door body is automatically closed can be indirectly preset. When the torque adjusting screw is rotated in the direction of increasing the preset torque, the transmission gear of the torque output end will rotate to output the preset torque, so that the resistance when the door is opened increases, and the restoring force when the door is automatically closed increases. In the production process, it is often necessary to detect whether the torque adjusting function of the above-mentioned door closer meets the requirements. If each door closer is installed on a specific door for detection, it will inevitably cause the detection steps to be complicated, the detection efficiency to be low, and the detection cost to be high. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the above-mentioned shortcomings of the prior art: to provide a detection method for effectively improving the torque detection efficiency of the box shell door closer.

[0004] The technical solution of the present application is as follows: a detection method of a box shell door closer, the door closer includes a torque adjusting screw and a torque output end, the detection method is based on a detection device with the following structure, the detection device includes a table top, the table top includes a door closer clamping assembly, a door closer adjusting assembly and a test load assembly; the detection method specifically includes the following steps:

[0005] 1) First, fix the door closer to be detected on the door closer clamping assembly;

[0006] 2) Adjust the torque adjusting screw of the door closer to be tested through the door closer adjusting assembly, so that the torque output end of the door closer to be tested outputs torque to drive the test load assembly, and whether the door closer to be tested meets the torque requirement is judged according to the increase of the potential energy of the test load assembly and the maintenance time.

[0007] As optimization, the door closer adjusting assembly comprises a slide rail arranged on the table top, a stepping motor in slidable cooperation with the slide rail, an output shaft end of the stepping motor being provided with a driving structure in cooperation with an end of a torque adjusting screw rod of the door closer, the stepping motor being driven to slide along the slide rail by a pneumatic cylinder fixed at a bottom of the table top, the test load assembly comprising a bearing arranged on the table top, a horizontally arranged load rotating shaft in cooperation with the bearing, one end of the load rotating shaft being hingedly connected with a weight, the other end of the load rotating shaft being provided with a circumferential limiting structure in cooperation with a torque output end of the door closer, the load rotating shaft being provided with a radially arranged supporting rod, an end of the supporting rod being provided with a proximity switch, in an initial state, the supporting rod is vertically upward, the connecting rod hingedly connected with the weight is vertically downward, the pneumatic cylinder is controlled to extend or retract by controlling opening and closing of a gas passage by an electromagnetic valve, the stepping motor, the electromagnetic valve of the pneumatic cylinder and the proximity switch are electrically connected with a main controller, the main controller is provided with a start detection button and a buzzer electrically connected therewith.

[0008] The detection method specifically comprises the following steps:

[0009] 1) first, the door closer to be detected is fixed on the door closer clamping assembly;

[0010] 2) after the start detection button on the main controller is pressed, the main controller first starts the stepping motor to rotate the output shaft end thereof, then the main controller controls the electromagnetic valve of the pneumatic cylinder to drive the pneumatic cylinder to drive the stepping motor to slide along the slide rail until the driving structure of the output shaft end of the stepping motor cooperates with the end of the torque adjusting screw rod, the stepping motor continuously rotates the torque adjusting screw rod to increase the torque output by the torque output end of the door closer to be detected, the torque output end drives the load rotating shaft to rotate, the weight is lifted to a horizontal state of the connecting rod, at this time, the supporting rod rotates to make the proximity switch contact the table top and then close, the main controller judges that the proximity switch is closed, starts timing and closes the stepping motor, when the proximity switch remains closed for a predetermined time, the buzzer emits a sound signal indicating that the detection is passed, when the proximity switch is opened when the predetermined time is not reached, the buzzer emits a sound signal indicating that the detection is failed.

[0011] 3) after the detection is completed, the main controller controls the electromagnetic valve of the pneumatic cylinder to drive the stepping motor to slide in the reverse direction along the slide rail until the driving structure of the output shaft end of the stepping motor is separated from the end of the torque adjusting screw rod, the main controller waits for the next detection cycle.

[0012] As optimization, the door closer clamping assembly comprises a clamping block arranged on the table top and a telescopic pressing rod.

[0013] As optimization, the clamping block is provided with a limiting groove in cooperation with the door closer to be clamped.

[0014] As optimization, a through hole is arranged in the limiting groove of the clamping block, and the through hole is opposite to the torque output end of the door closer.

[0015] One end of the load rotating shaft penetrates through the through hole on the clamping block, and the end is provided with a circumferential limiting structure matched with the torque output end of the door closer.

[0016] The bottom of the table top is fixed with a gas cylinder, and the bottom of the stepping motor is fixed with the telescopic gas rod end of the gas cylinder.

[0017] The door closer clamping assembly is used for clamping and fixing the door closer shell, the door closer adjusting assembly is used for rotating and adjusting the torque adjusting screw of the door closer, and the test load assembly is used for detecting the preset torque of the torque output end of the door closer.

[0018] The present application has the beneficial effect that the qualified rate of the box shell door closer is efficiently detected. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the prior art box shell door closer in the embodiment.

[0020] Figure 2 It is a three-dimensional structure schematic diagram of the prior art box shell door closer in the embodiment.

[0021] Figure 3 It is a three-dimensional structure schematic diagram of the detection device in the embodiment.

[0022] Figure 4 It is a three-dimensional structure schematic diagram of the detection device in the embodiment.

[0023] Figure 5 It is a top view structure schematic diagram of the detection device in the embodiment.

[0024] Figure 6 It is a partial structure schematic diagram of the detection device in the embodiment. DETAILED DESCRIPTION

[0025] The present application will be further described in detail with specific embodiments, but the present application is not limited to the following specific embodiments.

[0026] EMBODIMENT

[0027] In this embodiment, Figures 1-2As shown in one of the small box shell door closer for example provides a kind of efficient detection device, the door closer includes torque output end 101 and torque adjusting screw 102, torque adjusting screw 102 is used to preset the maximum torque value of door closer torque output end 101, when torque adjusting screw 102 is rotated in the direction of increasing preset torque, the transmission gear with internal hexagon hole of torque output end 101 will rotate and increase output torque.

[0028] As shown in Figures 3-6 A torque detection device of box shell door closer, including table top 1, the table top 1 includes:

[0029] Door closer clamping assembly for clamping and fixing door closer shell;

[0030] Door closer adjusting assembly for rotating and adjusting torque adjusting screw 102 of door closer;

[0031] Test load assembly for detecting whether the preset torque of torque output end 101 of door closer meets the requirements.

[0032] The door closer clamping assembly includes clamping block 2 provided on the table top 1, telescopic pressure rod 3.

[0033] The clamping block 2 is provided with limiting groove 4 matched with the door closer to be clamped.

[0034] The limiting groove 4 of the clamping block 2 is provided with through hole 21 opposite to the torque output end 101 of the door closer.

[0035] The telescopic pressure rod 3 is threadedly connected with the fixed block provided on the table top 1, and the tail end of the telescopic pressure rod 3 is provided with a hand wheel for driving the telescopic pressure rod 3 to extend and retract.

[0036] The door closer adjusting assembly includes slide rail 5 provided on the table top 1 and step motor 6 slidably connected with the slide rail 5.

[0037] The output shaft end of the step motor 6 is provided with driving structure matched with the end of the torque adjusting screw 102 of the door closer. In the embodiment, the end of the torque adjusting screw 102 is a character-shaped groove, and the driving structure is a character-shaped protrusion.

[0038] The step motor 6 is driven to slide along the slide rail 5 by a pneumatic mechanism, the bottom of the table top 1 is fixed with air cylinder 7, and the bottom of the step motor 6 is fixed with the telescopic rod end of the air cylinder 7.

[0039] The test load assembly includes bearing 8 provided on the table top 1 and load shaft 9 horizontally arranged and matched with the bearing 8.

[0040] One end of the load shaft 9 passes through the through hole 21 on the clamping block 2, and this end is provided with a circumferential limiting structure 91 that cooperates with the torque output end 101 of the door closer. In this embodiment, the circumferential limiting structure 91 is specifically an external hexagonal protrusion structure.

[0041] The other end of the load shaft 9 is hinged to a weight 10 via a connecting rod.

[0042] The load shaft 9 is provided with a radially arranged support rod, and a proximity switch 11 is provided at the end of the support rod. The proximity switch 11 can be a mechanical contact switch, or a switch based on ultrasonic, laser, or other principles, as long as it can trigger an action when approaching or contacting the upper surface of the platform 1.

[0043] When the support rod is perpendicular to the platform 1 and facing upwards, the connecting rod that hinges the weight 10 is perpendicular to downwards.

[0044] The cylinder 7 controls the extension and retraction of the telescopic rod by controlling the opening and closing of the air circuit through the solenoid valve. The stepper motor 6, the solenoid valve of the cylinder 7, and the proximity switch 11 are all electrically connected to the main controller. The main controller is equipped with a start detection button and a buzzer that are electrically connected to it.

[0045] The detection method specifically includes the following steps:

[0046] 1) First, Figures 1-2 The door closer shown is embedded in the limiting groove 4 of the clamping block 2, so that the transmission gear with the internal hexagonal hole at its torque output end 101 engages with the circumferential limiting structure 91, i.e., the external hexagonal protrusion structure, at the end of the load shaft 9; then the handwheel is rotated so that the telescopic pressure rod 3 presses and fixes the outer shell of the door closer; at this time, the support rod on the load shaft 9 is perpendicular to the table surface 1 and faces upward, and the connecting rod that hinges the weight 10 is perpendicular to downward.

[0047] 2) After pressing the start detection button on the main controller, the main controller first starts the stepper motor 6, causing its output shaft end to rotate. Then, the main controller controls the solenoid valve of the cylinder 7, causing the cylinder 7 to drive the stepper motor 6 to slide along the slide rail 5 until the drive structure at the output shaft end of the stepper motor 6 engages with the torque adjusting screw end. The I-shaped protrusion at the output shaft end of the stepper motor 6 presses against the torque adjusting screw 102 on the side wall of the door closer and then embeds into the I-shaped groove to achieve a limiting engagement, as shown in the figure. Figure 6As shown, the stepper motor 6 continuously rotates the torque adjusting screw 102 to increase the preset torque of the torque output end 101, at this time the torque output end 101 outputs torque to rotate the load rotating shaft 9, the load rotating shaft 9 will slowly swing the weight 10 through the connecting rod to the horizontal state, at this time the support rod rotates to make the proximity switch 11 contact the table 1 and then close; the main controller starts timing and closes the stepper motor 6 after the proximity switch 11 is closed; when the proximity switch 11 still remains closed when reaching the predetermined time, a sound signal of passing the test is sent through the buzzer; when the proximity switch 11 is in the open state when not reaching the predetermined time, it means that the tested door closer cannot stably output torque, and a sound signal of failing the test is sent through the buzzer.

[0048] 3) At the end of the test, the main controller controls the electromagnetic valve of the cylinder 7 to drive the stepper motor 6 to slide in the opposite direction of the slide rail 5, so that the driving structure at the end of the output shaft of the stepper motor 6 is separated from the end of the torque adjusting screw, and the main controller waits for the next detection cycle.

[0049] As a further optimization, after pressing the start detection button on the main controller in step 2), the main controller starts to calculate the timeout time T out , when T out is 1.5-2 times the normal detection cycle time of one detection cycle, the current test is ended, so that the main controller waits for the signal of the proximity switch 11 when the tested door closer cannot output torque.

[0050] Since whether the above door closer meets the requirements is tested by rotating the torque adjusting screw 102 for a certain number of turns, the transmission gear with an internal hexagonal hole at the torque output end 101 will always correspond to a certain proportion of torque output, and the torque adjusting screw 102 will slip and idle when it rotates to the maximum torque of the torque output end 101, and the output torque will no longer increase. Therefore, by adjusting the weight of the weight and the length of the connecting rod, the set torque value required for the load rotating shaft 9 to rotate 90 degrees can be adjusted, and through the detection device, it can be efficiently detected whether the torque output end 101 of the door closer can reach the required preset torque under the adjustment of the torque adjusting screw 102.

[0051] The above is only an embodiment of the features of the present application, and does not constitute any limitation on the protection scope of the present application. Any technical solution formed by equivalent exchange or equivalent replacement falls within the protection scope of the present application.

Claims

1. A method for detecting a box-type door closer, the door closer comprising a torque adjusting screw and a torque output end, characterized in that, The detection method is based on a detection device with the following structure, which comprises a table top (1) including a door closer clamping assembly, a door closer adjusting assembly and a test load assembly; The detection method specifically comprises the following steps: 1) First, fix the door closer to be detected on the door closer clamping assembly; 2) Adjust the torque adjusting screw of the door closer to be tested through the door closer adjusting assembly, so that the torque output end of the door closer to be tested drives the test load assembly to output torque, and judge whether the torque requirement of the door closer to be tested is reached according to the increase and maintenance time of the potential energy of the test load assembly; The door closer adjusting assembly comprises a slide rail (5) arranged on the table top (1), and a stepping motor (6) which is slidably matched with the slide rail (5); The output shaft end of the stepping motor (6) is provided with a driving structure matched with the end of the torque adjusting screw of the door closer; The stepping motor (6) is driven to slide along the slide rail (5) by the air cylinder (7) fixed on the bottom of the table top (1); The test load assembly comprises a bearing (8) arranged on the table top (1) and a horizontally arranged load shaft (9) matched with the bearing (8); One end of the load shaft (9) is hinged to a weight (10) through a connecting rod, and the other end is provided with a circumferential limiting structure (91) matched with the torque output end of the door closer; The load shaft (9) is provided with a radially arranged support rod, and the end of the support rod is provided with a proximity switch (11); In the initial state, the support rod is perpendicular to the table top (1) and upward, and the connecting rod hinged to the weight (10) is perpendicular to the table top (1) and downward; The air cylinder (7) controls the extension and retraction of its extension rod by controlling the opening and closing of the electromagnetic valve control gas path, and the stepping motor (6), the electromagnetic valve of the air cylinder (7) and the proximity switch (11) are electrically connected with the main controller, and the main controller is provided with a start detection button and a buzzer which are electrically connected with the main controller.

2. The method of claim 1, wherein the door closer is a cabinet door closer. The detection method specifically comprises the following steps: 1) First, fix the door closer to be detected on the door closer clamping assembly; 2) After pressing the start detection button on the main controller, the main controller first starts the stepper motor (6) to rotate the output shaft end, and then controls the electromagnetic valve of the cylinder (7) to drive the cylinder (7) to drive the stepper motor (6) to slide along the slide rail (5) to the driving structure at the output shaft end of the stepper motor (6) to cooperate with the end of the torque adjusting screw, the stepper motor (6) continuously rotates the torque adjusting screw to increase the torque output of the torque output end of the door closer to be detected; the torque output end drives the load rotating shaft (9) to rotate, so that the weight (10) is lifted to the horizontal state of the connecting rod, at this time the support rod rotates to make the proximity switch (11) contact the table top (1) and close; the main controller judges that the proximity switch (11) is closed, starts timing and closes the stepper motor (6) after the proximity switch (11) is closed; when the proximity switch (11) still remains closed state when reaching the predetermined time, the detection passes sound signal is sent through the buzzer; when the proximity switch (11) is separated from the table top (1) and is in the open state when the predetermined time is not reached, the test fails sound signal is sent through the buzzer; 3) After the detection is completed, the main controller controls the electromagnetic valve of the cylinder (7) to drive the stepper motor (6) to slide in the opposite direction along the slide rail (5) to make the driving structure at the output shaft end of the stepper motor (6) to be separated from the end of the torque adjusting screw, and the main controller waits for the next detection cycle.

3. The method for detecting a box-type door closer according to claim 2, characterized in that, The door closer clamping assembly comprises a clamping block (2) arranged on the table top (1) and a telescopic pressing rod (3).

4. The method of claim 3, wherein the door closer is a box shell door closer. The clamping block (2) is provided with a limiting groove (4) matched with the door closer to be clamped.

5. The method of claim 4, wherein the door closer is a cabinet door closer. The limiting groove (4) of the clamping block (2) is provided with a through hole (21) opposite to the torque output end of the door closer.

6. The method of claim 5, wherein the door closer is a box shell door closer. One end of the load rotating shaft (9) penetrates through the through hole (21) on the clamping block (2), and the end is provided with a circumferential limiting structure (91) matched with the torque output end of the door closer.

7. The method of claim 1, wherein the door closer is a cabinet closer. The bottom of the table top (1) is fixed with a cylinder (7), and the bottom of the stepper motor (6) is fixed with the telescopic rod end of the cylinder (7).

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