A lifting control module for a lifting table

Abstract

The utility model discloses a lifting control module for a lifting table, including a first power supply end, a second power supply end, and a first switch module, a second switch module, and a connection terminal of a forward and reverse motor connected in series between the first power supply end and the second power supply end, the first power supply end and the second power supply end serve as interchangeable input and output ends, a sound averaging module is connected in series between the first switch module and the second switch module, the sound averaging module includes a unidirectional circuit module and a voltage dividing circuit module, the unidirectional circuit module and the voltage dividing circuit module are connected in parallel, during the rising process, the current between the first switch module and the second switch module flows through the unidirectional circuit module, and during the falling process, the current between the first switch module and the second switch module flows through the voltage dividing circuit module. The sound averaging module of the utility model allows the current to pass through the unidirectional circuit module during the rising process and the voltage dividing circuit module during the falling process, and the voltage of the forward and reverse motors decreases, thereby making the running sound of the motors tend to be consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tables, and in particular to a lifting control module for lifting tables. Background Art

[0002] At present, most lifting tables on the market use a motor-driven lifting mechanism to drive the desktop panel to rise and fall. During the process of the motor-driven lifting mechanism rising, the motor load is heavy (especially when a rock plate is used as the desktop panel), the motor speed is low, and the motor running sound is low. However, during the process of the motor-driven lifting mechanism descending, the motor load is light, the motor speed is high, and the motor running sound is high, resulting in obvious inconsistency in the motor running sound during the rising and descending processes of the lifting table. Consumers usually think that the sound of the motor during the rising process is louder than the sound during the descending process, but in fact, the sound during the descending process is louder than the sound during the rising process, which can easily make consumers think that the motor is faulty. Utility Model Content

[0003] The utility model aims to provide a lifting control module for a lifting table, in which the motor sounds of the lifting table tend to be consistent during the lifting and lowering processes.

[0004] The purpose of the utility model is achieved in this way.

[0005] A lifting control module for a lifting table comprises a first power supply end, a second power supply end, and a first switch module, a second switch module, and a connection terminal of a forward and reverse motor connected in series between the first power supply end and the second power supply end, wherein the first power supply end and the second power supply end serve as an interchangeable input end and an output end, a sound averaging module is connected in series between the first switch module and the second switch module, the sound averaging module comprises a unidirectional circuit module and a voltage dividing circuit module, the unidirectional circuit module and the voltage dividing circuit module are connected in parallel,

[0006] During the rising process, the current between the first switch module and the second switch module flows through the unidirectional circuit module.

[0007] During the falling process, the current between the first switch module and the second switch module flows through the voltage divider circuit module.

[0008] The utility model uses a sound averaging module to make the current pass through a unidirectional circuit module during the rising process and pass through a voltage dividing circuit module during the falling process, so that the voltage of the forward and reverse motors decreases, thereby making the running sounds of the motors tend to be consistent, preventing consumers from mistaking the forward and reverse motors for faults.

[0009] The above technical solution can be further improved as follows.

[0010] Furthermore, the unidirectional circuit module includes at least one unidirectional diode. The unidirectional circuit module is simple and easy to implement, and the unidirectional circuit module prevents the rising current from passing through the voltage divider circuit module.

[0011] The unidirectional circuit module includes a reversing switch, a forward diode, and a reverse diode. The forward diode and the reverse diode are connected in parallel, and the forward diode and the reverse diode are in opposite directions. The reversing switch is connected in series with the forward diode or the reverse diode to conduct electricity. The reversing switch enables the lifting control module to adapt to motors installed in forward and reverse directions, and has a wider range of applications.

[0012] Furthermore, the voltage divider circuit module includes a voltage divider resistor or a voltage divider inductor. The voltage divider circuit module is simple and easy to implement.

[0013] Furthermore, the first switch module includes a first limit switch and a first switch diode, the first limit switch and the first switch diode are connected in parallel, the second switch module includes a second limit switch and a second switch diode, the second limit switch and the second switch diode are connected in parallel, and the first switch diode and the second switch diode are in opposite directions. The first switch module and the second switch module cooperate to realize the upper and lower limit stops of the motor operation.

[0014] Furthermore, it also includes a third power supply terminal and a third switch module, the third power supply terminal and the first power supply terminal are connected in series with a forward and reverse motor, a sound averaging module, a second switch module and a third switch module, and the third power supply terminal and the third switch module are connected in parallel with the first switch module and the second power supply terminal.

[0015] Furthermore, the third switch module includes a third limit switch and a third switch diode, the third limit switch and the third switch diode are connected in parallel, and the direction of the third switch diode is opposite to that of the second switch diode. The first switch module, the second switch module and the third switch module cooperate to realize the three-limit stop of the motor operation.

[0016] The utility model uses a sound-averaging module to make the current pass through a unidirectional circuit module during the rising process and through a voltage-dividing circuit module during the falling process, so that the voltage of the forward and reverse motors decreases, thereby making the running sounds of the motors more consistent, thereby preventing consumers from mistaking the forward and reverse motors for faults. The unidirectional circuit module and the voltage-dividing circuit module are simple and easy to implement. The reversing switch makes the lifting control module adapt to motors installed in forward and reverse directions, and has a wider range of applications. The utility model can be used for existing lifting tables. By adding a lifting control module, the functions of the existing lifting tables can be upgraded, reducing the cost of modifying the lifting table production line, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of Embodiment 1.

[0018] Figure 2 This is a circuit diagram of Embodiment 2.

[0019] Figure 3 This is a circuit diagram of Embodiment 3.

[0020] Figure 4 This is a circuit diagram of Embodiment 4. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Example 1, see Figure 1 As shown, a lifting control module for a lifting table includes a first power supply terminal 1, a second power supply terminal 2, and a first switch module 5, a second switch module 6 and a connection terminal of a forward and reverse motor 4 connected in series between the first power supply terminal 1 and the second power supply terminal 2. The first power supply terminal 1 and the second power supply terminal 2 serve as interchangeable input terminals and output terminals. A sound averaging module 7 is connected in series between the first switch module 5 and the second switch module 6. The sound averaging module 7 includes a unidirectional circuit module 8 and a voltage divider circuit module 9. The unidirectional circuit module 8 and the voltage divider circuit module 9 are connected in parallel.

[0023] The unidirectional circuit module 8 includes at least one unidirectional diode 81. The voltage-dividing circuit module 9 includes a voltage-dividing resistor 91. Of course, the voltage-dividing circuit module 9 can also be a voltage-dividing inductor.

[0024] The first switch module 5 includes a first limit switch 51 and a first switch diode 52, which are connected in parallel. The second switch module 6 includes a second limit switch 61 and a second switch diode 62, which are connected in parallel. The first switch diode 52 and the second switch diode 62 are in opposite directions.

[0025] In this embodiment, the first limit switch 51 is a lower limit switch, and the second limit switch 61 is an upper limit switch. The first limit switch 51 and the second limit switch 61 are normally closed.

[0026] Working principle: The lifting mechanism of the lifting table starts to rise from the first limit switch 51, the power is input from the first power terminal 1 and output from the second power terminal 2, and the current flows through the first limit switch 51, the one-way diode 81 and the second limit switch 61 in sequence. Until the lifting mechanism rises to the second limit switch 61, the lifting mechanism touches the second limit switch 61, the second limit switch 61 is disconnected, and the circuit is disconnected due to the restriction of the second switch diode 62, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops rising.

[0027] In this process, the current only flows through the unidirectional circuit module 8 and does not pass through the voltage-dividing circuit module 9. During the ascending process of the lifting mechanism, the voltage of the forward and reverse motor 4 is not affected by the voltage-dividing circuit module 9 and the operation is stable.

[0028] The control module of the lifting table controls the change of the current direction, that is, the power is input from the second power supply terminal 2 and output from the first power supply terminal 1, the forward and reverse motor 4 reverses, and the lifting mechanism of the lifting table starts to descend from the second limit switch 61, and the current flows through the second limit switch 61 or the second switch diode 62, the voltage divider resistor 91 and the first limit switch 51 in sequence. Until the lifting mechanism descends to the first limit switch 51, the lifting mechanism touches the first limit switch 51, the first limit switch 51 is disconnected, and the circuit is disconnected due to the restriction of the first switch diode 52, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops descending.

[0029] During this process, the current cannot pass through the unidirectional circuit module 8 and only flows through the voltage divider circuit module 9. During the descent of the lifting mechanism, the voltage of the forward and reverse motor 4 is reduced due to the influence of the voltage divider circuit module 9, the descent speed of the lifting mechanism slows down, and the sound of the forward and reverse motor 4 decreases.

[0030] As shown in the test data, the working voltage of the forward and reverse motor 4 is DC26V.

[0031] The control module working mode of the existing lifting table is: the lifting mechanism rises for 34.5s, the current of the forward and reverse motor 4 is 0.7~0.8A, and the sound of the forward and reverse motor 4 rising is 54.5~55.5 decibels; the lifting mechanism descends for 27.5s, the current of the forward and reverse motor 4 is 0.23~0.25A, and the sound of the forward and reverse motor 4 descending is 58~59 decibels.

[0032] The control module working mode of the utility model lifting table: the voltage divider circuit module 9 is a 33 ohm resistor, the lifting mechanism rises for 34.3S, the voltage of the forward and reverse motor 4 is 26V, the current of the forward and reverse motor 4 is 0.7-0.8A, and the sound of the forward and reverse motor 4 rising is 54.5-55.5 decibels; the lifting mechanism descends for 44.5S, the current of the forward and reverse motor 4 is 0.25-0.28A, (when the current is 0.25A, the voltage divided by the voltage divider resistor 91 is 8.25V, and the voltage on the forward and reverse motor 4 is 17.75V) The sound of the forward and reverse motor 4 descending is 53.5-55 decibels. The voltage drop of the diode is 0.7 V (ignored when calculating the voltage of the forward and reverse motor 4).

[0033] It can be seen from the above experimental test data that after the lifting table adopts the control module of the lifting table of the present application, the sound of the forward and reverse motor 4 during the rising or falling process tends to be consistent, which is not easy to cause misunderstanding to consumers.

[0034] Example 2, see Figure 2As shown, the difference from the first embodiment is that the unidirectional circuit module 8 can adjust the current direction. In this embodiment, the unidirectional circuit module 8 includes a reversing switch 82, a forward diode 83, and a reverse diode 84. The forward diode 83 and the reverse diode 84 are connected in parallel, and the forward diode 83 and the reverse diode 84 are in opposite directions. The reversing switch 82 is selected to be connected in series with the forward diode 83 or the reverse diode 84 for conduction.

[0035] Due to different structural designs of the lifting table, the forward and reverse motor 4 may be installed forward or reversely.

[0036] If the forward and reverse motor 4 of the lifting table is installed in the forward direction, the reversing switch 82 is selected to be connected in series with the forward diode 83 for conduction, and the working process is the same as that of the first embodiment.

[0037] If the forward and reverse motor 4 of the lifting table is reversely installed, that is, the first limit switch 51 is an upper limit switch, and the second limit switch 61 is a lower limit switch, the reversing switch 82 is selected to be connected in series with the reverse diode 84 for conduction.

[0038] The lifting mechanism of the lifting table starts to rise from the second limit switch 61, that is, the power is input from the second power supply terminal 2 and output from the first power supply terminal 1, the forward and reverse motor 4 rotates forward, and the lifting mechanism of the lifting table starts to rise from the second limit switch 61, and the current flows through the second limit switch 61 or the second switch diode 62, the reverse diode 84 and the first limit switch 51 in sequence. Until the lifting mechanism rises to the first limit switch 51, the lifting mechanism touches the first limit switch 51, the first limit switch 51 is disconnected, and the circuit is disconnected by the first switch diode 52, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops rising. In this process, the current only flows through the unidirectional circuit module 8, not through the voltage divider circuit module 9. During the rising process of the lifting mechanism, the voltage of the forward and reverse motor 4 is not affected by the voltage divider circuit module 9, and the operation is stable.

[0039] The control module of the lifting table controls the change of the current direction, that is, the power is input from the first power supply terminal 1 and output from the second power supply terminal 2. The current flows through the first switch diode 52 or the second switch diode 62, the voltage divider resistor 91 and the second limit switch 61 in sequence. The forward and reverse motor 4 reverses until the lifting mechanism descends to the second limit switch 61, the lifting mechanism touches the second limit switch 61, the second limit switch 61 is disconnected, and the circuit is disconnected due to the restriction of the second switch diode 62, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops descending.

[0040] During this process, the current cannot pass through the unidirectional circuit module 8 and only flows through the voltage divider circuit module 9. During the descent of the lifting mechanism, the voltage of the forward and reverse motor 4 is reduced due to the influence of the voltage divider circuit module 9, the descent speed of the lifting mechanism slows down, and the sound of the forward and reverse motor 4 decreases.

[0041] Example 3, see Figure 3 As shown, it is different from the first embodiment in that it also includes a third power supply terminal 3 and a third switch module 10, and the third power supply terminal 3 and the first power supply terminal 1 are connected in series with the forward and reverse motor 4, the sound averaging module 7, the second switch module 6 and the third switch module 10, and the third power supply terminal 3 and the third switch module 10 are connected in parallel with the first switch module 5 and the second power supply terminal 2. The third switch module 10 includes a third limit switch 11 and a third switch diode 12, and the third limit switch 11 and the third switch diode 12 are connected in parallel, and the direction of the third switch diode 12 is opposite to that of the second switch diode 62.

[0042] In this embodiment, the first limit switch 51 is a lower limit switch, the second limit switch 61 is an upper limit switch, the third limit switch 11 is a middle limit switch close to the first limit switch 51, and the first limit switch 51, the second limit switch 61 and the third limit switch 11 are normally closed. The second power supply terminal 2 is used as a common power supply terminal, the first power supply terminal 1 is used as a reset power supply terminal, and the third power supply terminal 3 is used as a safe position power supply terminal.

[0043] Working principle: The lifting mechanism of the lifting table starts to rise from the first limit switch 51, the power is input from the first power terminal 1 or the third power terminal 3, and the second power terminal 2 is output, and the current flows through the first limit switch 51 or the third limit switch 11, the one-way diode 81 and the second limit switch 61 in sequence. Until the lifting mechanism rises to the second limit switch 61, the lifting mechanism touches the second limit switch 61, the second limit switch 61 is disconnected, and the circuit is disconnected due to the restriction of the second switch diode 62, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops rising.

[0044] In this process, the current only flows through the unidirectional circuit module 8 and does not pass through the voltage-dividing circuit module 9. During the ascending process of the lifting mechanism, the voltage of the forward and reverse motor 4 is not affected by the voltage-dividing circuit module 9 and the operation is stable.

[0045] The control module of the lifting table controls the change of the current direction, that is, the power is input from the second power supply terminal 2, the first power supply terminal 1 or the third power supply terminal 3 is output, the forward and reverse motor 4 is reversed, and the lifting mechanism of the lifting table starts to descend from the second limit switch 61, and the current flows through the second limit switch 61 or the second switch diode 62, the voltage divider resistor 91 and the first limit switch 51 or the third limit switch 11 in sequence. Until the lifting mechanism descends to the first limit switch 51 or the third limit switch 11, the lifting mechanism touches the first limit switch 51 or the third limit switch 11, the first limit switch 51 or the third limit switch 11 is disconnected, and is restricted by the first switch diode 52 or the third switch diode 12, the circuit is disconnected, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops descending. In this process, the current cannot pass through the unidirectional circuit module 8, and only flows through the voltage divider circuit module 9. During the descent of the lifting mechanism, the voltage of the forward and reverse motor 4 is reduced by the voltage divider circuit module 9, the descent speed of the lifting mechanism slows down, and the sound of the forward and reverse motor 4 decreases.

[0046] Example 4, see Figure 4 As shown, the difference from the third embodiment is that the unidirectional circuit module 8 can adjust the current direction. In this embodiment, the unidirectional circuit module 8 includes a reversing switch 82, a forward diode 83, and a reverse diode 84. The forward diode 83 and the reverse diode 84 are connected in parallel, and the forward diode 83 and the reverse diode 84 are in opposite directions. The reversing switch 82 is selected to be connected in series with the forward diode 83 or the reverse diode 84 for conduction.

[0047] Due to the structural design of the lifting table, the forward and reverse motor 4 of different models of lifting tables may be installed forward or reversely.

[0048] If the forward and reverse motor 4 of the lifting table is installed in the forward direction, the reversing switch 82 is selected to be connected in series with the forward diode 83 for conduction, and the working process is the same as that of the third embodiment.

[0049] If the forward and reverse motor 4 of the lifting table is reversely installed, that is, the first limit switch 51 is an upper limit switch, and the second limit switch 61 is a lower limit switch, the reversing switch 82 is selected to be connected in series with the reverse diode 84 for conduction.

[0050] Working principle: The lifting mechanism of the lifting table starts to rise from the first limit switch 51, the power is input from the second power terminal 2, and the first power terminal 1 or the third power terminal 3 is output, and the current flows through the second limit switch 61, the reverse diode 84, the first limit switch 51 or the third limit switch 11 in sequence. Until the lifting mechanism rises to the first limit switch 51 or the third limit switch 11, the lifting mechanism touches the first limit switch 51 or the third limit switch 11, the first limit switch 51 or the third limit switch 11 is disconnected, and is limited by the first switch diode 52 or the third switch diode 12, the circuit is disconnected, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops rising.

[0051] In this process, the current only flows through the unidirectional circuit module 8 and does not pass through the voltage-dividing circuit module 9. During the ascending process of the lifting mechanism, the voltage of the forward and reverse motor 4 is not affected by the voltage-dividing circuit module 9 and the operation is stable.

[0052] The control module of the lifting table controls the change of the current direction, that is, the power is input from the first power terminal 1 or the third power terminal 3 and output from the second power terminal 2, the forward and reverse motor 4 reverses, and the lifting mechanism of the lifting table starts to descend from the second limit switch 61. The current flows through the first limit switch 51 or the third limit switch 11, the voltage divider resistor 91 and the second limit switch in sequence. Until the lifting mechanism descends to the second limit switch 61, the lifting mechanism touches the second limit switch 61, the second limit switch 61 is disconnected, and is restricted by the second switch diode 62, the circuit is disconnected, that is, the forward and reverse motor 4 stops running, and the lifting mechanism stops descending. In this process, the current cannot pass through the unidirectional circuit module 8, and only flows through the voltage divider circuit module 9. During the descent of the lifting mechanism, the voltage of the forward and reverse motor 4 is reduced by the voltage divider circuit module 9, the descent speed of the lifting mechanism slows down, and the sound of the forward and reverse motor 4 decreases.

Claims

1. A lifting control module for a lifting table, comprising a first power supply terminal (1), a second power supply terminal (2), and a first switch module (5), a second switch module (6), and a connection terminal of a forward and reverse motor (4) connected in series between the first power supply terminal (1) and the second power supply terminal (2), wherein the first power supply terminal (1) and the second power supply terminal (2) serve as an interchangeable input terminal and an output terminal, and wherein: A sound averaging module (7) is connected in series between the first switch module (5) and the second switch module (6); the sound averaging module (7) comprises a unidirectional circuit module (8) and a voltage dividing circuit module (9); the unidirectional circuit module (8) and the voltage dividing circuit module (9) are connected in parallel. During the rising process, the current between the first switch module (5) and the second switch module (6) flows through the unidirectional circuit module (8). During the descending process, the current between the first switch module (5) and the second switch module (6) flows through the voltage dividing circuit module (9).

2. The lifting control module for a lifting table according to claim 1, characterized in that: The unidirectional circuit module (8) comprises at least one unidirectional diode (81).

3. The lifting control module for a lifting table according to claim 1, characterized in that: The unidirectional circuit module (8) comprises a reversing switch (82), a forward diode (83), and a reverse diode (84); the forward diode (83) and the reverse diode (84) are connected in parallel, the forward diode (83) and the reverse diode (84) have opposite directions, and the reversing switch (82) selects to be connected in series with the forward diode (83) or the reverse diode (84) to conduct electricity.

4. The lifting control module for a lifting table according to claim 1, characterized in that: The voltage dividing circuit module (9) comprises a voltage dividing resistor (91) or a voltage dividing inductor.

5. The lifting control module for a lifting table according to claim 1, characterized in that: The first switch module (5) comprises a first limit switch (51) and a first switch diode (52), the first limit switch (51) and the first switch diode (52) being connected in parallel, and the second switch module (6) comprises a second limit switch (61) and a second switch diode (62), the second limit switch (61) and the second switch diode (62) being connected in parallel, and the first switch diode (52) and the second switch diode (62) being in opposite directions.

6. The lifting control module for a lifting table according to claim 5, characterized in that: The device further comprises a third power supply terminal (3) and a third switch module (10); a forward and reverse motor (4), a sound averaging module (7), a second switch module (6) and a third switch module (10) are connected in series between the third power supply terminal (3) and the first power supply terminal (1); and the third power supply terminal (3) and the third switch module (10) are connected in parallel with the first switch module (5) and the second power supply terminal (2).

7. The lifting control module for a lifting table according to claim 6, characterized in that: The third switch module (10) comprises a third limit switch and a third switch diode (12); the third limit switch and the third switch diode (12) are connected in parallel; the direction of the third switch diode (12) is opposite to that of the second switch diode (62).

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