Screw hoist with stroke limiting function

Abstract

The utility model belongs to the technical field of screw type hoists, and particularly relates to a screw type hoist with a stroke limiting function, which comprises a base, a supporting part, an opening and closing gear box, a threaded pull rod and a driving motor, the opening and closing gear box is fixed above the base through the supporting part, and the threaded pull rod is vertically mounted on the opening and closing gear box. The driving motor is connected with the opening and closing gear box to drive the opening and closing gear box to work, a vertical limiting rod is arranged on the base through a vertical sliding sleeve, a trigger switch is arranged on the supporting part and located over the vertical limiting rod, and a conductive elastic piece is arranged at the top of the vertical limiting rod. The conductive elastic piece is located in the trigger switch and controls the trigger switch to be turned on or turned off through vertical movement of the conductive elastic piece, the power line is connected with a power plug through the trigger switch and the wire, the defects in the prior art are overcome, and the defects that an existing sensor type stroke limiting device is not energy-saving and prone to damage are overcome. Power on and off of the driving motor are controlled through the mechanical trigger switch, so that limiting is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw-type gate hoists, and in particular relates to a screw-type gate hoist with a stroke limiting function. Background Art

[0002] The screw gate hoist, also known as the screw-type gate hoist, is a machine that uses a threaded rod to connect the gate leaf directly or through a guide slider and a connecting rod, and the screw moves up and down to open and close the gate. With the widespread development of water conservancy and hydropower projects, gate hoists and gates used in projects such as river dams in reservoir irrigation areas and hydropower stations are widely used. The installation and debugging technology and the knowledge of use and maintenance should also be vigorously promoted. For construction installation units and use management departments, this technology and knowledge should be popularized to ensure the quality of the project and give full play to the project benefits.

[0003] With the rapid development of science and technology, there are restrictions on the height of gate opening and closing in water conservancy. The simplest method is to use sensor detection to control the drive motor to control the height. However, on the one hand, the sensor needs to be powered on all the time to work, which does not meet the energy-saving effect. On the other hand, the sensor often fails in the harsh environment of water conservancy. Therefore, it is necessary to develop a low-cost, non-failure and energy-saving screw-type gate opening and closing machine with travel limit function to meet actual needs. Utility Model Content

[0004] The purpose of the utility model is to provide a screw-type gate opener with a stroke limit function, which overcomes the shortcomings of the prior art and solves the drawbacks of the existing sensor-type stroke limit, such as being energy-inefficient and easily damaged. The power on and off of the drive motor is controlled by a mechanical trigger switch, thereby completing the limit.

[0005] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A screw-type gate opening and closing machine with a stroke limit function comprises a base, a support part, a gate opening and closing gear box, a threaded pull rod and a driving motor. The gate opening and closing gear box is fixed above the base through the support part, and the threaded pull rod is vertically installed on the gate opening and closing gear box. The driving motor is connected to the gate opening and closing gear box to drive it to work. A power cord is provided on the driving motor, and the power cord comprises a live wire and a neutral wire. A vertical limit rod is provided on the base through a vertical sliding sleeve, and a trigger switch is provided on the support part directly above the vertical limit rod. A conductive spring is provided on the top of the vertical limit rod. The conductive spring is located in the trigger switch and controls the trigger switch to be opened or closed by moving up and down through the conductive spring. The power cord is connected to a power plug through the trigger switch and a wire.

[0007] Furthermore, the trigger switch includes a shell, a conductive column one, a conductive column two and a conductive column three, the conductive column two and the conductive column three are located at the same horizontal position, the conductive column one is located above the conductive column two and the conductive column three and fixed in a triangular position, the conductive spring is located above the conductive column two and the conductive column three, the middle of the lower surface of the conductive spring is connected to the top of the vertical limit rod through a spring, and under the action of the vertical limit, the two ends of the conductive spring are respectively in contact with the conductive column two and the conductive column three, thereby connecting the conductive column two and the conductive column three.

[0008] Furthermore, the neutral line is connected to the power plug through the conductive post 1 and the wire connection, the live line is connected to the conductive post 2, and the conductive post 3 is connected to the power plug through the wire connection.

[0009] Furthermore, the portion of the vertical limiting rod located below the base is a telescopic rod mechanism, and the lowermost end of the telescopic rod mechanism is a spherical structure.

[0010] Furthermore, a locking structure is provided on the telescopic rod mechanism.

[0011] Furthermore, a length scale is provided on the telescopic rod mechanism.

[0012] Furthermore, a plurality of reinforced guide sleeves are provided outside the support portion or outside the drive motor, and the plurality of reinforced guide sleeves cooperate with the upper portion of the vertical limit rod.

[0013] Furthermore, a limit block is provided on the vertical limit rod below the reinforced guide sleeve or the vertical sliding sleeve. When the vertical limit rod is pushed upward, the limit block contacts the reinforced guide sleeve or the vertical sliding sleeve to prevent the vertical limit rod from moving upward indefinitely and damaging the trigger switch.

[0014] Furthermore, a baffle is provided outside the support part or the drive motor, and a clearance hole is provided on the baffle, and a vertical limit rod passes through the clearance hole. A retaining ring is provided on the vertical limit rod below the baffle, and a spring structure is provided on the vertical limit rod between the retaining ring and the baffle. Under the action of the spring, the vertical limit rod is subjected to a downward force, thereby ensuring that the conductive spring sheet maintains contact with the conductive column two and the conductive column three when there is no external force.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a screw-type gate hoist with a stroke limiting function, and is designed with a vertical limiting rod, which is a telescopic rod mechanism. When the screw-type gate hoist is working, the telescopic rod mechanism is fixed toward the gate direction and can be extended to a required length. When the driving motor drives the gate to open, the gate moves upward. When it hits the lower end of the vertical limiting rod, the vertical limiting rod is pushed upward by it, and the conductive spring moves upward and is disengaged from the second and third conductive columns. The driving motor is powered off, that is, the gate stops moving. The entire stroke limiting function is controlled by a mechanical structure, does not require additional electricity or other energy sources to work, and has good stability, and the external environment has little effect on its function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a screw-type gate hoist with a travel limit function Figure 1 .

[0018] Figure 2 A schematic diagram of the structure of a screw-type gate hoist with a travel limit function Figure 2 .

[0019] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure.

[0020] Figure 4 Schematic diagram of the internal structure of a trigger switch. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the screw-type gate opening and closing machine with a stroke limiting function described in the utility model comprises a base 1, a support part 2, a gate opening and closing gear box 3, a threaded pull rod 4 and a driving motor 5. The gate opening and closing gear box 3 is fixed above the base 1 through the support part 2, and the threaded pull rod 4 is vertically installed on the gate opening and closing gear box 3. The driving motor 5 is connected to the gate opening and closing gear box 3 to drive it to work. A power line 51 is provided on the driving motor 5, and the power line 51 includes a live wire and a neutral wire. A vertical limiting rod 6 is provided on the base 1 through a vertical sliding sleeve 11, and a trigger switch 7 is provided on the support part 2 directly above the vertical limiting rod 6. A conductive spring piece 67 is provided on the top of the vertical limiting rod 6, and the conductive spring piece 67 is located in the trigger switch 7. The trigger switch is controlled to open or close by moving up and down through the conductive spring piece. The power cord is connected to a power plug 81 through a trigger switch and a wire 8; the trigger switch 7 includes a shell, a conductive column 1 71, a conductive column 2 72 and a conductive column 3 73, the conductive column 2 72 and the conductive column 3 73 are located at the same horizontal position, the conductive column 1 71 is located above the conductive column 2 72 and the conductive column 3 73 and is fixed in a triangular position, the conductive spring is located above the conductive column 2 and the conductive column 3, the middle of the lower surface of the conductive spring is connected to the top of the vertical limit rod through a spring, and the two ends of the conductive spring are respectively in contact with the conductive column 2 and the conductive column 3 under the action of the vertical limit, so that the conductive column 2 and the conductive column 3 are turned on; the live wire is connected to the power plug through the conductive column 1 and the wire, the live wire is connected to the conductive column 2, and the conductive column 3 is connected to the power plug through the wire. A vertical limit rod is designed, which is a telescopic rod mechanism. When the screw-type gate hoist is working, the telescopic rod mechanism is fixed toward the direction of the gate and can be extended to the required length. When the driving motor drives the gate to open, the gate moves upward. When it hits the lower end of the vertical limit rod, the vertical limit rod is pushed upward by it, and the conductive spring moves upward and is disengaged from the second and third conductive columns. The driving motor is powered off, and the gate stops moving.

[0024] Embodiment 2

[0025] like Figure 1 , Figure 2 and Figure 3 The vertical limit rod 6 is a telescopic rod mechanism, and a locking structure is provided on each telescopic joint of the telescopic rod, that is, after being telescoped to a predetermined length, it is fixed by the locking structure, and the lower end of the telescopic rod mechanism is designed as a spherical structure 61. Preferably, a length scale 62 is provided on the telescopic rod mechanism.

[0026] Embodiment 3

[0027] like Figure 1 , Figure 2 and Figure 3As shown, several reinforced guide sleeves 601 are provided outside the support part or the drive motor, and the several reinforced guide sleeves are matched with the upper part of the vertical limit rod; a limit block 63 is provided on the rod body of the vertical limit rod below the reinforced guide sleeve or the vertical sliding sleeve. When the vertical limit rod is pushed upward, the limit block contacts with the reinforced guide sleeve or the vertical sliding sleeve to prevent the vertical limit rod from moving upward infinitely and damaging the trigger switch.

[0028] Embodiment 4

[0029] like Figure 3 A baffle 65 is also provided outside the support part or the drive motor as shown, and a clearance hole is provided on the baffle. The vertical limit rod passes through the clearance hole. A retaining ring 64 is provided on the vertical limit rod below the baffle. A spring structure 66 is provided on the vertical limit rod between the retaining ring and the baffle. Under the action of the spring, the vertical limit rod is subjected to a downward force, thereby ensuring that the conductive spring sheet maintains contact with the conductive column two and the conductive column three when there is no external force.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A screw-type gate hoist with a stroke limit function, comprising a base, a support, a gate gear box, a threaded pull rod and a drive motor, wherein the gate gear box is fixed above the base through the support, the threaded pull rod is vertically mounted on the gate gear box, the drive motor is connected to the gate gear box to drive it to work, the drive motor is provided with a power line, the power line includes a live line and a neutral line, and is characterized in that: A vertical limit rod is arranged on the base through a vertical sliding sleeve, a trigger switch is arranged on the support part directly above the vertical limit rod, a conductive spring is arranged on the top of the vertical limit rod, the conductive spring is located in the trigger switch and the trigger switch is controlled to be opened or closed by moving the conductive spring up and down, and the power cord is connected to a power plug through the trigger switch and a wire.

2. The screw-type gate hoist with travel limit function according to claim 1, characterized in that: The trigger switch includes a shell, a conductive column one, a conductive column two and a conductive column three, wherein the conductive column two and the conductive column three are located at the same horizontal position, the conductive column one is located above the conductive column two and the conductive column three and fixed in a triangular position, the conductive spring is located above the conductive column two and the conductive column three, the middle of the lower surface of the conductive spring is connected to the top of the vertical limit rod through a spring, and under the action of the vertical limit, the two ends of the conductive spring are respectively in contact with the conductive column two and the conductive column three, so that the conductive column two and the conductive column three are turned on.

3. The screw-type gate hoist with travel limit function according to claim 2, characterized in that: The neutral line is connected to the power plug through the conductive post 1 and the wire connection, the live line is connected to the conductive post 2, and the conductive post 3 is connected to the power plug through the wire connection.

4. The screw-type gate hoist with travel limit function according to claim 1, characterized in that: The part of the vertical limiting rod located under the base is a telescopic rod mechanism, and the lowermost end of the telescopic rod mechanism is a spherical structure.

5. The screw-type gate hoist with travel limit function according to claim 4 is characterized in that: The telescopic rod mechanism is provided with a locking structure when being extended.

6. The screw-type gate hoist with travel limit function according to claim 5, characterized in that: The telescopic rod mechanism is provided with a length scale.

7. The screw-type gate hoist with travel limit function according to claim 1, characterized in that: A plurality of reinforced guide sleeves are arranged outside the support part or outside the drive motor, and the plurality of reinforced guide sleeves are matched with the upper part of the vertical limiting rod.

8. The screw-type gate hoist with travel limit function according to claim 7, characterized in that: A limit block is provided on the vertical limit rod below the reinforced guide sleeve or the vertical sliding sleeve. When the vertical limit rod is pushed upward, the limit block contacts the reinforced guide sleeve or the vertical sliding sleeve to prevent the vertical limit rod from infinitely moving upward to damage the trigger switch.

9. The screw-type gate hoist with travel limit function according to claim 1, characterized in that: A baffle is also provided outside the support part or the drive motor, and a clearance hole is provided on the baffle. The vertical limit rod passes through the clearance hole, and a retaining ring is provided on the vertical limit rod below the baffle. A spring structure is provided on the vertical limit rod between the retaining ring and the baffle. Under the action of the spring, the vertical limit rod is subjected to a downward force, thereby ensuring that the conductive spring sheet maintains contact with the conductive column two and the conductive column three when there is no external force.

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