High-torque self-locking worm gear case

Abstract

The utility model relates to the technical field of worm gear cases, in particular to a high-torque self-locking type worm gear case which comprises a shell mechanism serving as a device body, the shell mechanism comprises two connecting shells and a base, a self-locking mechanism used for adjusting and self-locking a worm is arranged on one side of the shell mechanism, and the base is connected with the shell mechanism. The shell mechanism is provided with a dismounting and mounting mechanism used for simply and conveniently dismounting and mounting the shell mechanism, and the self-locking mechanism comprises two cross-shaped clamping blocks. By arranging the self-locking mechanism, the device can adjust and self-lock the worm, when the worm gear case does not work, the two round rods on the connecting plate a are clamped with the two round grooves in the base by installing the pressing plate, the connecting plate b is installed on the pressing plate through the two round grooves and the through groove, the adjusting plate moves through the sliding groove, and therefore the worm gear case can be adjusted and self-locked. And the two locking blocks are meshed and fixed with the two locking wheels, so that the worm is locked, and the situation that the worm is touched by external force, and consequently the valve rotates is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of worm gear boxes, in particular to a large-torque self-locking worm gear box. Background Art

[0002] A worm gearbox utilizes the principle of worm and worm wheel transmission to reduce a high-speed rotating input shaft to the required output speed. Existing worm gearboxes only offer one-way self-locking. This self-locking behavior depends primarily on the worm's helix angle and the friction coefficient between the worm and the gear. When the helix angle is smaller than the friction angle between the worm and the gear, the worm wheel becomes self-locking, allowing the worm to easily rotate the wheel but preventing the wheel from rotating the worm. Consequently, the worm's self-locking mechanism fails. When not in operation, even the slightest external force on the worm can cause the valve to rotate. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a high-torque self-locking worm gear box, which has the advantage of being able to self-lock the worm to prevent it from rotating due to external force. It solves the problem in the existing technology that the worm cannot be self-locked, and the valve is easily rotated when the worm is touched by a slight external force.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A high-torque self-locking worm gear box includes a housing mechanism as the main body of the device, the housing mechanism includes two connecting housings and a base, one side of the housing mechanism is provided with a self-locking mechanism for adjusting the self-locking of the worm, and the housing mechanism is provided with a disassembly mechanism for simply disassembling and assembling the housing mechanism, the self-locking mechanism includes two cross blocks, the other sides of the two cross blocks are fixedly connected to a locking wheel, the other sides of the two locking wheels are fixedly connected to a rotating rod, the bottom of the base is provided with a square groove, the base is symmetrically provided with two slide grooves in the square groove, an adjustment plate is slidably connected in the square groove, one side of the adjustment plate is fixedly connected to two locking blocks, two sides of the base are provided with two circular grooves, two round rods are clamped in the multiple circular grooves on one side of the base, a connecting plate a is fixedly connected between the two round rods on one side, and a connecting plate b is fixedly connected between the two round rods on the other side, one side of the connecting plate a is fixedly connected to a pressure plate, one side of the pressure plate is provided with a through groove, and a support rod is clamped in the through groove.

[0006] Preferably, two sliders are fixedly connected to both sides of the adjustment plate, and the multiple sliders slide in multiple sliding grooves respectively, and one end of the support rod is fixedly connected to one side of the connecting plate b.

[0007] Preferably, the disassembly and assembly mechanism includes a fixing belt, and multiple semicircular blocks a and multiple semicircular blocks b are fixedly connected to the outer sides of the two connecting shells respectively. Circular holes a are symmetrically opened on the fixing belt, and multiple circular holes b are opened on the fixing belt.

[0008] Preferably, the diameter of the combination of the multiple semicircular blocks a and the multiple semicircular blocks b is the same as the diameter of the multiple circular holes b, and the diameter of the two circular holes a is the same as the diameter of the two ends of the worm.

[0009] Preferably, both ends of the worm are provided with cross slots engaged with cross blocks, one side of the base is provided with two square slots, and one side of the two connecting shells is fixedly connected with square blocks engaged with the square slots.

[0010] Preferably, the two locking blocks are respectively engaged and fixed with the two locking wheels.

[0011] By means of the above technical solution, the present invention provides a high-torque self-locking worm gear box, which has at least the following beneficial effects:

[0012] 1. The utility model provides a self-locking mechanism so that the device can adjust and self-lock the worm. When the worm gear box is not working, the two round rods on the connecting plate a are engaged with the two circular grooves on the base by installing the pressure plate, and the connecting plate b is installed on the pressure plate through the two circular grooves and the through groove, so that the adjusting plate moves through the slide groove, so that the two locking blocks engage and fix the two locking wheels, thereby locking the worm and preventing the valve from rotating due to the worm being touched by external force.

[0013] 2. The utility model provides a disassembly and assembly mechanism so that the device as a whole can be easily disassembled and assembled. The two connecting shells are fixed by the two directional slots on the base, and are connected to the two ends of the worm through the two circular holes a on the fixing belt. The multiple circular holes b on the fixing belt are combined and fixed with the semicircular blocks a and b, so that the two connecting shells and the base can be easily disassembled and assembled, so that the staff can easily repair and replace the internal components, thereby improving the maintenance efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the self-locking mechanism of the utility model;

[0017] Figure 3 This is an exploded view of the self-locking mechanism of the utility model;

[0018] Figure 4 It is an exploded view of the disassembly and assembly mechanism of the utility model.

[0019] Reference numerals:

[0020] 1. Shell mechanism; 101. Connecting shell; 102. Base; 2. Self-locking mechanism; 201. Rotating rod; 202. Locking wheel; 203. Square groove; 204. Adjusting plate; 205. Slide groove; 206. Locking block; 207. Circular groove; 208. Pressing plate; 209. Connecting plate a; 210. Through groove; 211. Connecting plate b; 212. Support rod; 3. Disassembly and assembly mechanism; 301. Semicircular block a; 302. Semicircular block b; 303. Fixing belt; 304. Circular hole a; 305. Circular hole b. DETAILED DESCRIPTION

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

[0022] The worm gear box in the prior art can only achieve one-way self-locking. The realization of worm gear self-locking mainly depends on the helix angle of the worm and the friction coefficient between the worm wheel and the worm. When the helix angle of the worm is smaller than the friction angle between the worm wheel and the worm, the spiral surface of the worm will generate normal pressure on the worm wheel during the transmission process, thereby generating friction. When the helix angle of the worm is smaller than the friction angle, the friction will prevent the worm wheel from reversing, thereby achieving self-locking. The worm can easily rotate the worm wheel, but the worm wheel cannot rotate the worm, and the worm self-locking cannot be achieved. When not working, when the worm is touched by a slight external force, it is easy to cause the valve to rotate. The following describes a high-torque self-locking worm gear box provided by some embodiments of the utility model in conjunction with the accompanying drawings.

[0023] Example 1:

[0024] In order to ensure the self-locking effect of the worm gear box, combined with Figure 1 、 Figure 2 and Figure 3 As shown, a large torque self-locking worm gear box is proposed. A shell mechanism 1 is set as the main body of the device. A self-locking mechanism 2 is set on one side of the shell mechanism 1. The worm is adjusted and self-locked by the self-locking mechanism 2. A disassembly and assembly mechanism 3 is set on the shell mechanism 1. The disassembly and assembly mechanism 3 is used to easily disassemble and assemble the shell mechanism 1, which is convenient for staff to easily maintain.

[0025] In order to prevent the worm from rotating due to external force, a self-locking mechanism 2 is proposed. Two cross blocks are provided, and the other sides of the two cross blocks are fixedly connected to a locking wheel 202. The other sides of the two locking wheels 202 are fixedly connected to a rotating rod 201. A square groove 203 is provided at the bottom of the base 102. Two sliding grooves 205 are symmetrically provided in the square groove 203 at the base 102. An adjusting plate 204 is slidably connected in the square groove 203. One side of the adjusting plate 204 is fixedly connected to two locking blocks 206. Two circular grooves 207 are provided on both sides of the base 102. Two round rods are clamped in the multiple circular grooves 207 on one side of the base 102. A connecting plate a209 is fixedly connected between the two round rods on one side, and a connecting plate b211 is fixedly connected between the two round rods on the other side. A pressure plate is fixedly connected to one side of the connecting plate a209. 208. A through slot 210 is provided on one side of the pressure plate 208, and a support rod 212 is clamped in the through slot 210. Two sliders are fixedly connected to both sides of the adjustment plate 204, and multiple sliders slide in multiple slide slots 205 respectively. One end of the support rod 212 is fixedly connected to one side of the connecting plate b211, and the two locking blocks 206 are respectively engaged and fixed with the two locking wheels 202. By installing the pressure plate 208, the two round rods on the connecting plate a209 are clamped with the two circular grooves 207 on the base 102, and are connected with the two round rods and the support rod 212 through the two circular grooves 207 and the through slot 210, so that the connecting plate b211 is installed on the pressure plate 208, so that the adjustment plate 204 moves in the square slot 203 through the two sliders and the two slide slots 205, so that the two locking blocks 206 engage and fix the two locking wheels 202, thereby locking the worm and ensuring the self-locking effect of the worm gear box.

[0026] Example 2:

[0027] On the basis of Example 1, the technical solution proposed in Example 1 is used to solve the technical problem in the prior art that the worm cannot self-lock when not working, and easily causes the valve to rotate when the worm is touched by a slight external force. However, the connection of the existing worm gear box housing is mainly through bolts. If the internal components of the worm gear box are damaged, the staff will have to disassemble it in a cumbersome process, which is not conducive to the simple maintenance and replacement of the worm gear box components.

[0028] In order to easily disassemble and assemble the entire device, Figure 1 and Figure 3 as well as Figure 4As shown, a disassembly and assembly mechanism 3 is proposed. By installing a fixing belt 303, multiple semicircular blocks a301 and multiple semicircular blocks b302 are fixedly connected to the outer sides of the two connecting shells 101 respectively. Circular holes a304 are symmetrically opened on the fixing belt 303. Multiple circular holes b305 are opened on the fixing belt 303. The diameter of the combination of the multiple semicircular blocks a301 and the multiple semicircular blocks b302 is the same as the diameter of the multiple circular holes b305. The diameter of the two circular holes a304 is the same as the diameter of the two ends of the worm. The two ends of the worm are connected through the two circular holes a304 on the fixing belt 303, and the multiple circular holes b305 on the fixing belt 303 are combined and fixed with the semicircular blocks a301 and b302, so that the two connecting shells 101 and the base 102 can be easily disassembled and assembled, so that the staff can easily repair and replace the internal components, thereby improving the maintenance efficiency of the device.

[0029] In order to fix and protect the internal worm and worm wheel, a shell mechanism 1 is proposed. By installing two connecting shells 101 and a base 102, both ends of the worm are provided with a cross slot that is engaged with the cross block, and one side of the base 102 is provided with two square slots. One side of the two connecting shells 101 is fixedly connected with a square block that is engaged with the square slot. The cross blocks on the two locking wheels 202 are connected to the cross slots at both ends of the worm, and the base 102 and the two connecting shells 101 are combined and connected through the two square slots and the two square blocks.

[0030] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high torque self-locking worm gear box, comprising a housing mechanism (1) as a device body, wherein the housing mechanism (1) comprises two connecting housings (101) and a base (102), characterized in that: A self-locking mechanism (2) for adjusting and self-locking the worm is provided on one side of the housing mechanism (1), and a disassembly mechanism (3) for easily disassembling and assembling the housing mechanism (1) is provided on the housing mechanism (1); The self-locking mechanism (2) comprises two cross blocks, the other sides of the two cross blocks are fixedly connected to a locking wheel (202), the other sides of the two locking wheels (202) are fixedly connected to a rotating rod (201), a square groove (203) is provided at the bottom of the base (102), two sliding grooves (205) are symmetrically provided in the square groove (203) at the base (102), an adjusting plate (204) is slidably connected in the square groove (203), and one side of the adjusting plate (204) is fixedly connected to two locking blocks (20 6), two circular grooves (207) are provided on both sides of the base (102), two round rods are clamped in the multiple circular grooves (207) on one side of the base (102), a connecting plate a (209) is fixedly connected between the two round rods on one side, and a connecting plate b (211) is fixedly connected between the two round rods on the other side, one side of the connecting plate a (209) is fixedly connected to a pressure plate (208), one side of the pressure plate (208) is provided with a through groove (210), and a support rod (212) is clamped in the through groove (210).

2. A high torque self-locking worm gear box according to claim 1, characterized in that: Two sliders are fixedly connected to both sides of the adjustment plate (204), and the sliders slide in the plurality of slide grooves (205) respectively. One end of the support rod (212) is fixedly connected to one side of the connecting plate b (211).

3. A high torque self-locking worm gear box according to claim 2, characterized in that: The disassembly and assembly mechanism (3) comprises a fixing belt (303), and the outer sides of the two connection shells (101) are respectively fixedly connected with a plurality of semicircular blocks a (301) and a plurality of semicircular blocks b (302). The fixing belt (303) is symmetrically provided with circular holes a (304), and the fixing belt (303) is provided with a plurality of circular holes b (305).

4. A high torque self-locking worm gear box according to claim 3, characterized in that: The combined diameter of the multiple semicircular blocks a (301) and the multiple semicircular blocks b (302) is the same as the diameter of the multiple circular holes b (305), and the diameter of the two circular holes a (304) is the same as the diameter of the two ends of the worm.

5. The high torque self-locking worm gear box according to claim 1, characterized in that: Both ends of the worm are provided with cross slots engaged with cross blocks, one side of the base (102) is provided with two square slots, and one side of the two connecting shells (101) is fixedly connected with square blocks engaged with the square slots.

6. The high torque self-locking worm gear box according to claim 1, characterized in that: The two locking blocks (206) are respectively engaged and fixed with the two locking wheels (202).

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