Safety stroke control box capable of preventing stroke switch from being damaged

Abstract

The invention provides a safety stroke control box capable of preventing a stroke switch from being damaged, which comprises a control box base, two sets of control assemblies which are symmetrically arranged front and back are arranged on the control box base, the two sets of control assemblies are divided into a first control assembly and a second control assembly, and a first spring pressing sheet and a second spring pressing sheet are arranged between the two sets of control assemblies. A lead screw of a speed reducer is inserted between the first spring pressing sheet and the second spring pressing sheet; the lead screw is provided with a left rotating assembly and a right rotating assembly which are the same in structure and comprise the first rotating assembly on the left side and the second rotating assembly on the right side, the first rotating assembly and the second rotating assembly are used for controlling the two stroke positions respectively, the first rotating assembly is matched with the first control assembly, and the second rotating assembly and the second control assembly are matched. When a greenhouse and animal husbandry speed reducer has the phenomena of wrong wire sequence connection, vehicle sliding or working switch failure and the like during installation and debugging, the travel switch can be prevented from being damaged, and high accuracy and high reliability of triggering the safety travel switch are ensured.

Description

Technical Field

[0001] The invention relates to a safety travel control box, in particular to a safety travel control box that prevents a travel switch from being damaged. Background Art

[0002] Existing large greenhouses and livestock and poultry houses usually use reducers with safety travel control to operate the skylight mechanism. When a phase sequence error occurs, causing the travel switch to fail to work properly, the safety switch will be triggered to stop the reducer, thereby preventing the reducer from over-traveling and damaging the greenhouse or livestock and poultry house.

[0003] The existing patent CN219262108U mentions a safety travel control box. When an over-travel occurs, the swing arm of the travel switch in the safety travel control box is easily deformed and causes the travel setting to change, and even damages the greenhouse and livestock and poultry house. The existing product RIDDER brand has a safety travel control box. The manufacturing process and quality of the spring sheet in its structure are difficult to control, resulting in poor accuracy of the safety travel, which may cause damage to the greenhouse and livestock and poultry house. Summary of the invention

[0004] The present invention provides a safety travel control box for preventing damage to a travel switch, which is used to solve the problem of a travel switch failure of the safety travel control box, thereby causing losses. The technical solution is as follows: A safety travel control box to prevent damage to a travel switch comprises a control box base, on which are mounted two sets of control components arranged front and back and symmetrically arranged, which are divided into a first control component and a second control component, between which a first spring pressing sheet and a second spring pressing sheet are arranged, and between which a lead screw of a reducer is inserted; the lead screw is provided with two left and right sets of rotating components with the same structure, which are divided into a first rotating component on the left and a second rotating component on the right, which are respectively used to control two travel positions, the first rotating component cooperates with the first control component, and the second rotating component cooperates with the second control component.

[0005] The control assembly includes a working switch assembly and a safety switch assembly arranged up and down, the working switch assembly is installed on the control box base through a working switch assembly mounting plate, one end of the working switch assembly is connected to the working switch assembly mounting plate through a first pin shaft, and the other end is connected to a first elastomer, and the first elastomer is installed on a second pin shaft of the working switch assembly mounting plate; the safety switch assembly is installed on the control box base, one end of the safety switch assembly is connected to the control box base through a third pin shaft, and the other end is connected to a second elastomer, and the second elastomer is installed on a fourth pin shaft of the control box base; the first pin shaft and the third pin shaft are located on the same side, and the second pin shaft and the fourth pin shaft are located on the same side.

[0006] The working switch assembly includes a first travel switch, a first elastic pressure arm, and a first screw. The first travel switch is fixedly connected to the first elastic pressure arm via the first screw.

[0007] The first elastic body adopts a first torsion spring, one end of which is in contact with the first elastic body pressure arm of the working switch assembly, and the other end of which is in contact with the side wall of the working switch assembly mounting plate.

[0008] The safety switch assembly includes a second travel switch, a second elastic body pressure arm, and a second screw. The second travel switch is fixedly connected to the second elastic body pressure arm via the second screw.

[0009] One end of the second torsion spring contacts the second elastic pressure arm of the safety switch assembly, and the other end contacts the side wall of the control box base.

[0010] The lead screw is provided with a thread, and the rotating assembly includes a locking block, an annular block, and a knurled nut. The annular block is provided with a lever, the locking block is fixed on the lead screw, the knurled nut is sleeved on the lead screw, and the lever is fixed to the knurled nut through the annular block. When the lead screw rotates, the knurled nut and the lever move in a straight line on the lead screw together. When the knurled nut drives the annular block to contact the locking block on the same side, the annular block clamps the locking block, and the rotation of the lever will press down the spring sheet.

[0011] The left side of the first spring pressing piece is fixed to the control box base through the first slot, and the right side can swing to approach the first control component; the right side of the second spring pressing piece is fixed to the control box base through the second slot, and the left side can swing to approach the second control component.

[0012] A wiring terminal is also provided, and the wiring terminal is fixedly connected to the control box base.

[0013] It also includes a control box cover that matches the control box base, and the control box cover is fixedly connected to the control box base by screws.

[0014] The safety travel control box that prevents damage to the travel switch can prevent damage to the travel switch when the greenhouse and animal husbandry reducers are installed and debugged with the wrong line sequence, slipping, or the working switch fails, and ensures high accuracy and reliability in triggering the safety travel switch. This reduces the probability of reducer travel failure, reduces unnecessary losses caused by safety travel control box failure, and improves safety and stability in greenhouse and animal husbandry industries under operating conditions such as curtains and windows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : is a schematic diagram of the application of the safety travel control box for preventing damage to the travel switch; Figure 2 is an external schematic diagram of the safety travel control box for preventing damage to the travel switch; Figure 3 is an internal schematic diagram of the safety travel control box for preventing damage to the travel switch; Figure 4 is a three-dimensional schematic diagram of the safety travel control box for preventing damage to the travel switch; Figure 5 is a structural schematic diagram of the working switch assembly; Figure 6 is a schematic diagram of the structure of the safety switch assembly; Figure 7 It is a schematic diagram of the lead screw driving the locking block to squeeze the first control component. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, the safety travel control box 101 for preventing damage to the travel switch is fixed on the reducer 100 by bolts 10, and the reducer 100 is connected to the motor, such as Figure 7 As shown, the first gear 28 and the second gear 29 are both used to connect the potentiometer. The first gear 28 cooperates with the second gear 29. The second gear 29 is installed at the left end of the screw 30. A transmission belt and a pulley for driving the screw 30 to rotate are arranged on the right side of the screw 30. Both ends of the screw 30 are fixed to the reducer housing below the safety stroke control box 101 through bearings.

[0017] like Figure 2 As shown, the safety travel control box 101 for preventing damage to the travel switch includes a control box base 1, a control box cover 2 and a wiring terminal 6. The control box base 1 and the control box cover 2 cooperate with each other and are fixedly connected by screws 4 at the periphery. The control box base 1 and the control box cover 2 form a shell of the safety travel control box 101. A wiring terminal 6 is arranged at the rear side of the shell, and the wiring terminal 6 is fixedly connected to the control box base 1. A first spring pressing piece 3 and a second spring pressing piece 5 arranged front and back are arranged inside the shell. The left side of the first spring pressing piece 3 is fixed to the control box base 1 through a first card slot, and the right side can swing; the right side of the second spring pressing piece 5 is fixed to the control box base 1 through a second card slot, and the left side can swing. The first spring pressing piece 3 and the second spring pressing piece 5 are in the middle of the lead screw 30 driven by the reducer 100.

[0018] Combination Figure 3 and Figure 4As shown, the safety travel control box 101 is provided with two sets of control components arranged front and back, namely the first control component and the second control component, each set of control components includes a safety switch component, a working switch component mounting plate and a working switch component, the working switch component is located above the safety switch component, the working switch component is mounted on the working switch mounting plate fixedly mounted with the control box base 1, and the safety switch component is directly mounted on the control box base 1. In this way, the safety travel control box 101 is provided with two sets of safety switch components, two sets of working switch component mounting plates and two sets of working switch components. There is a lead screw 30 between the first control component and the second control component, a first spring pressing sheet 3 is provided between the first control component and the lead screw, and a second spring pressing sheet 5 is provided between the second control component and the lead screw. The wiring terminal 6 is located on the outside of the second control component.

[0019] The first control assembly is located at the front end of the safety travel control box 101, and includes a first working switch assembly 7, a first working switch assembly mounting plate 8 and a first safety switch assembly 20. The first working switch assembly mounting plate 8 is fixed to the control box base 1 by a first self-tapping screw 9, the left side of the first working switch assembly 7 is connected to the first working switch assembly mounting plate 8 by a first pin shaft, a second pin shaft is provided on the right side of the first working switch assembly mounting plate 8, a first torsion spring 11 is installed on the second pin shaft, one end of the first torsion spring 11 is in contact with the first elastic body pressure arm 12 of the first working switch assembly 7, and the other end is in contact with the side wall of the first working switch assembly mounting plate 8.

[0020] Combination Figure 5 As shown, the first working switch assembly 7 includes a first travel switch 13, a first elastic body pressure arm 12, and a first screw 26. One end of the first travel switch 13 is fixedly connected to the first elastic body pressure arm 12 through the first screw 26, and the first travel switch 13 is located between the first elastic body pressure arm 12 and the first spring pressure sheet 3. Through the action of the first torsion spring 11, the first elastic body pressure arm 12 of the first working switch assembly 7 tends to the direction of the first spring pressure sheet 3, and is limited by the first pin shaft, so that the first working switch assembly 7 can remain stable on the first working switch assembly mounting plate 8; when the first spring pressure sheet 3 applies force to the first travel switch 13 to a certain position, the first elastic body pressure arm 12 can further squeeze the first torsion spring 11 and make the first elastic body pressure arm 12 rotate around the first pin shaft to prevent the swing arm of the first travel switch 13 from being damaged.

[0021] The left side of the first safety switch assembly 20 is connected to the control box base 1 through a third pin shaft, and a fourth pin shaft is provided on the right side of the control box base 1. A second torsion spring 21 is installed on the fourth pin shaft. One end of the second torsion spring 21 contacts the second elastic body pressure arm 22 of the first safety switch assembly 20, and the other end contacts the side wall of the control box base 1. Figure 6 As shown, the first safety switch assembly 20 includes a second travel switch 23, a second elastic body pressure arm 22, and a second screw 27. One end of the second travel switch 23 is fixedly connected to the second elastic body pressure arm 22 through the second screw 27, and the second travel switch 23 is located between the second elastic body pressure arm 22 and the first spring pressure sheet 3. Through the action of the second torsion spring 21, the second elastic body pressure arm 22 of the first safety switch assembly 20 tends to the direction of the first spring pressure sheet 3, and is limited by the third pin shaft, so that the first safety switch assembly 20 can remain stable on the control box base 1. When the first spring pressure sheet 3 applies force to the second travel switch 23 to a certain position, the second elastic body pressure arm 22 can further squeeze the second torsion spring 21 and make the second elastic body pressure arm 22 rotate around the third pin shaft to prevent the swing arm of the second travel switch 23 from being damaged.

[0022] The first pin and the third pin are located on the same side, and the first pin is located above the third pin, and the two can also use the same pin. The second pin and the fourth pin are located on the same side, and the second pin is located above the fourth pin, and the two can also use the same pin.

[0023] Similarly, the second control assembly is located at the rear end of the safety travel control box 101, and its working principle is the same as that of the first control assembly, including a second working switch assembly 14, a second working switch assembly mounting plate 15 and a second safety switch assembly 24. The second working switch assembly mounting plate 15 is fixed to the control box base 1 by a second self-tapping screw 16. The right side of the second working switch assembly 14 is connected to the second working switch assembly mounting plate 15 by a fifth pin, and the left side of the second working switch assembly mounting plate 15 is installed with a sixth pin, and a third torsion spring 17 is installed on the sixth pin of the second working switch assembly mounting plate 15, one end of the third torsion spring 17 is in contact with the third elastic body pressure arm 18 of the second working switch assembly 14, and the other end is in contact with the side wall of the second working switch assembly mounting plate 15. The second working switch assembly 14 includes a third travel switch 19, a third elastic body pressure arm 18, and a third screw, and one end of the third travel switch 19 is fixedly connected to the third elastic body pressure arm 18 by a third screw.

[0024] The right side of the second safety switch assembly 24 is connected to the control box base 1 through a seventh pin shaft, and an eighth pin shaft is provided on the left side of the control box base 1. A fourth torsion spring 25 is installed on the eighth pin shaft of the control box base 1. One end of the fourth torsion spring 25 contacts the fourth elastic body pressure arm of the second safety switch assembly 24, and the other end contacts the side wall of the control box base 1. The second safety switch assembly 24 includes a fourth travel switch, a fourth elastic body pressure arm, and a fourth screw. One end of the fourth travel switch is fixedly connected to the fourth elastic body pressure arm through the fourth screw.

[0025] Furthermore, the torsion spring used above can also utilize other forms of elastic bodies, such as pressure springs, tension springs and rubber. When a torsion spring is used, no additional connector is required to connect the elastic body pressure arm with the torsion spring. If other elastic bodies are used, additional connectors may be required to connect the elastic body pressure arm with the torsion spring.

[0026] like Figure 7 As shown, a thread 31 is provided on the lead screw 30, and two groups of rotating components with the same structure are provided on the lead screw 30, which are divided into a first rotating component on the left and a second rotating component on the right. The two groups of rotating components are respectively used to control two travel positions, one corresponding to opening (pulling) and the other corresponding to closing (retracting). The first rotating component cooperates with the first control component, and the second rotating component cooperates with the second control component. The rotating component includes a locking block, an annular block, and a knurled nut. The annular block is provided with a lever, the locking block is fixed on the lead screw, the knurled nut is sleeved on the lead screw, and the lever is fixed on the knurled nut through the annular block. When the lead screw rotates (there are two rotation directions), the knurled nut and the lever move linearly on the lead screw together. When the knurled nut drives the annular block to contact the locking block on the same side, the annular block clamps the locking block, and the lever rotates to press down the spring sheet.

[0027] The first rotating assembly includes a first locking block 32, a first annular block 33, and a first knurled nut 34. The first annular block 33 is provided with a first lever 35, and the first lever 35 is fixed to the first knurled nut 34 through the first annular block 33. Similarly, the second rotating assembly includes a second locking block 36, a second annular block 37, and a second knurled nut 38. The second annular block 37 is provided with a second lever 39, and the second lever 39 is fixed to the second knurled nut 38 through the second annular block 37. The first locking block 32 and the second locking block 36 are fixed at both ends of the lead screw 30. After the first knurled nut 34 contacts the first locking block 32, it can be driven to rotate by the first locking block 32. After the second knurled nut 38 contacts the second locking block 36, it can be driven to rotate by the second locking block 36.

[0028] When the present invention is used, taking the first control component as an example, the motor of the reducer 100 drives the internal gear to rotate, and transmits power to the lead screw 30 connected to the reducer, so that the lead screw 30 rotates, and the rotation of the lead screw drives the locking block to rotate synchronously. When the set stroke is reached, the knurled nut drives the annular block to contact the locking block on the same side and starts to rotate synchronously with the locking block, and the lever starts to press down. There are the following three situations when pressing down: (1) When the first spring pressing piece 3 is pressed down by the first lever 39, the switch contact on the first working switch assembly 7 is triggered. At this time, the force triggering the switch contact is less than the compression force of the first torsion spring 11, and the first working switch assembly 7 will not rotate around the first pin shaft, so that the motor of the reducer cuts off the power supply and stops rotating.

[0029] (2) When the reducer 100 has the wrong wiring sequence during installation and debugging, or the working switch fails, the first spring pressing piece 3 will continue to be pressed down. At this time, the force triggering the switch is greater than the compression force of the first torsion spring 11. The first working switch assembly 7 will rotate around the first pin shaft to avoid the first spring pressing piece 3 until the switch contacts on the first safety switch assembly 20 are triggered, causing the reducer motor to cut off the power supply and stop rotating.

[0030] (3) When the reducer 100 slips, the first spring pressure piece 3 will continue to be pressed down. At this time, the force pressing down the first working switch contact continues to increase. When the first working switch assembly 7 continues to rotate around the first pin shaft, the first safety switch assembly 20 begins to rotate around the third pin shaft to avoid the first spring pressure piece 3, thereby preventing the swing arm of the first travel switch 13 of the first working switch assembly 7 from being deformed and damaged.

[0031] The safety travel control box that prevents damage to the travel switch can prevent damage to the travel switch when the greenhouse and animal husbandry reducers are installed and debugged with the wrong line sequence, slipping, or the working switch fails, and ensures high accuracy and reliability in triggering the safety travel switch. This reduces the probability of reducer travel failure, reduces unnecessary losses caused by safety travel control box failure, and improves safety and stability in greenhouse and animal husbandry industries under operating conditions such as curtains and windows.

Claims

1. A safety travel control box for preventing damage to a travel switch, characterized in that: It includes a control box base, on which are mounted two sets of control components arranged front and back and symmetrically arranged, which are divided into a first control component and a second control component, between which a first spring pressure plate and a second spring pressure plate are arranged, and between which a lead screw of a reducer is inserted; the lead screw is provided with two left and right sets of rotating components with the same structure, which are divided into a first rotating component on the left and a second rotating component on the right, which are respectively used to control two travel positions, the first rotating component cooperates with the first control component, and the second rotating component cooperates with the second control component.

2. The safety travel control box for preventing damage to the travel switch according to claim 1, characterized in that: The control assembly includes a working switch assembly and a safety switch assembly arranged up and down, the working switch assembly is installed on the control box base through a working switch assembly mounting plate, one end of the working switch assembly is connected to the working switch assembly mounting plate through a first pin shaft, and the other end is connected to a first elastomer, and the first elastomer is installed on a second pin shaft of the working switch assembly mounting plate; the safety switch assembly is installed on the control box base, one end of the safety switch assembly is connected to the control box base through a third pin shaft, and the other end is connected to a second elastomer, and the second elastomer is installed on a fourth pin shaft of the control box base; the first pin shaft and the third pin shaft are located on the same side, and the second pin shaft and the fourth pin shaft are located on the same side.

3. The safety travel control box for preventing damage to the travel switch according to claim 2, characterized in that: The working switch assembly includes a first travel switch, a first elastic pressure arm, and a first screw. The first travel switch is fixedly connected to the first elastic pressure arm via the first screw.

4. The safety travel control box for preventing damage to the travel switch according to claim 3, characterized in that: The first elastic body adopts a first torsion spring, one end of which is in contact with the first elastic body pressure arm of the working switch assembly, and the other end of which is in contact with the side wall of the working switch assembly mounting plate.

5. The safety travel control box for preventing damage to the travel switch according to claim 2, characterized in that: The safety switch assembly includes a second travel switch, a second elastic body pressure arm, and a second screw. The second travel switch is fixedly connected to the second elastic body pressure arm via the second screw.

6. The safety travel control box for preventing damage to the travel switch according to claim 5, characterized in that: One end of the second torsion spring contacts the second elastic pressure arm of the safety switch assembly, and the other end contacts the side wall of the control box base.

7. The safety travel control box for preventing damage to the travel switch according to claim 1, characterized in that: The lead screw is provided with a thread, and the rotating assembly includes a locking block, an annular block, and a knurled nut. The annular block is provided with a lever, the locking block is fixed on the lead screw, the knurled nut is sleeved on the lead screw, and the lever is fixed to the knurled nut through the annular block. When the lead screw rotates, the knurled nut and the lever move in a straight line on the lead screw together. When the knurled nut drives the annular block to contact the locking block on the same side, the annular block clamps the locking block, and the rotation of the lever will press down the spring sheet.

8. The safety travel control box for preventing damage to the travel switch according to claim 1, characterized in that: The left side of the first spring pressing piece is fixed to the control box base through the first slot, and the right side can swing to approach the first control component; the right side of the second spring pressing piece is fixed to the control box base through the second slot, and the left side can swing to approach the second control component.

9. The safety travel control box for preventing damage to the travel switch according to claim 1, characterized in that: A wiring terminal is also provided, and the wiring terminal is fixedly connected to the control box base.

10. The safety travel control box for preventing damage to the travel switch according to claim 1, characterized in that: It also includes a control box cover that matches the control box base, and the control box cover is fixedly connected to the control box base by screws.

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