Transmission worm shaft

Abstract

The utility model relates to a transmission worm shaft, which comprises a transmission shaft and an extension shaft, the transmission shaft and the extension shaft are welded and fixed, the outer side of the transmission shaft is provided with a thread strip meshed with a worm gear, the extension shaft comprises a fixed section and a connecting section, the connecting section is used for fixing with a driving shaft, and the connecting section is provided with a thread strip. The distance between the fixing section and the connecting section is adjustable, so that the length of the worm can be freely changed, and the fixing section and the connecting section are slidably connected. According to the transmission worm shaft, the extension shaft extends on the outer side of the transmission shaft, so that the length of the whole worm gear rod can be freely adjusted, the length-adjustable worm shaft provides higher flexibility and adaptability, the transmission worm shaft can be suitable for equipment and mechanical transmission systems with different sizes and layouts, a user can adjust the length of the worm shaft according to specific requirements, and the user experience is improved. The special mounting space and transmission ratio requirements are met, and due to the design of the length-adjustable worm shaft, a user can freely adjust the length, so that the mounting and maintenance processes are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft products, in particular to a transmission worm shaft. Background Art

[0002] A worm shaft usually refers to a component that works with a worm wheel in a worm drive system. Worm drive is a common transmission method, particularly suitable for situations with a large transmission ratio, compact structure, smooth transmission and low noise. The design and manufacturing of worm shafts have high requirements, and it is necessary to ensure that the spiral shape, precision and surface smoothness of the worm meet the use requirements. In terms of material selection, worm shafts usually use high-strength, wear-resistant alloy steel, and their performance is enhanced through processes such as heat treatment. In terms of lubrication, due to the particularity of worm drive, it is necessary to select suitable lubricating oil or grease to reduce friction and wear and improve transmission efficiency.

[0003] A Chinese patent (publication number CN220082071 U) discloses a transmission worm shaft, including a worm main body, a fixing device and a disassembly assembly, and by pressing the movable pull rods on both sides, the movable pull rods squeeze the limit ring to cause the limit ring to shrink. After shrinking, the limit ring pushes the disassembly movable ring, and the spring inside the disassembly movable ring is deformed after being subjected to pressure, so that after the outer diameters of the disassembly movable ring and the limit ring are reduced, the disassembly assembly can be pulled out from the fixed base, so that the maintenance worker can disassemble the worm and inspect or repair the worm separately when inspecting the worm, thereby improving the work efficiency of the maintenance worker and reducing the difficulty of inspecting the worm. In the prior art, the connection method between the worm shaft and the motor main body is relatively simple, and the purpose of easy disassembly is achieved. However, in different application scenarios, the length of the worm gear is taken into consideration. By quickly adjusting the length of the worm gear shaft, specific installation space and transmission ratio requirements can be met. Therefore, the present application proposes a transmission worm shaft to provide users with greater convenience and adaptability. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a transmission worm shaft having the advantages of adjustable length, etc., which solves the problem of not meeting specific installation space and transmission ratio requirements.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a transmission worm shaft, comprising a transmission shaft and an extension shaft, the transmission shaft and the extension shaft are welded and fixed, the outer side of the transmission shaft is provided with a threaded strip meshingly connected with a worm wheel, the extension shaft comprises a fixed section and a connecting section, the connecting section is used for fixing with the driving shaft, the distance between the fixed section and the connecting section is adjustable so that the length of the worm can be freely changed and the two are slidably connected;

[0006] The fixed section includes a fixed rod fixed to the left end of the transmission shaft, and the fixed rod is linearly opened with a cylindrical groove to the right on its left side surface, and two sleeve rods symmetrically distributed up and down are fixed to the right inner wall of the groove, and the inner sliding connection of the sleeve rods is linearly connected to the sliding rod that moves linearly and the two do not separate from each other, and two pressure plates are fixed inside the groove, and the same vertical movable plate is fixed to the outer sides of the two sliding rods, and a rectangular cavity is formed inside the movable plate, and springs are fixed to the inner walls of the upper and lower sides of the cavity, and trapezoidal plates are fixed on the opposite sides of the two springs, and two insertion rods are fixed on the opposite sides of the two trapezoidal plates, and one end of the insertion rod passes through the movable plate and extends to the inner wall of the groove.

[0007] Furthermore, the connecting section includes a sliding sleeve that slides on the outside of the fixing rod, a ring-shaped locking sleeve is fixed to the outside of the sliding sleeve, four screw holes are opened at the connection between the locking sleeve and the sliding sleeve, and the outer side of the locking sleeve is threadedly connected with a fixing bolt that passes through the screw holes and fits with the fixing rod.

[0008] Furthermore, the inner wall of the sliding sleeve is fixed to the two sliding rods respectively, and the inner diameter of the sliding sleeve is matched with the outer diameter of the fixing rod.

[0009] Furthermore, positioning rods distributed on the left and right are fixed to the cavity of the movable plate, and the two trapezoidal plates are slidably connected to the two positioning rods.

[0010] Furthermore, the pressing plate includes a mounting plate, a bracket and a pressing wheel, wherein the pressing wheel is rotatably connected to one end of the bracket, and the other end of the bracket is fixed to the mounting plate, and the pressing wheel faces the direction of the trapezoidal plate.

[0011] Furthermore, the two insertion rods on the trapezoidal plate are respectively located at the front and rear sides of the spring, the two springs and the two sliding rods are located on the same vertical line, and the ends of the insertion rods on the upper and lower sides that are away from each other are fixed with anti-slip rubber heads.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The transmission worm shaft adopts an extension shaft extending outside the transmission shaft so that the length of the entire worm gear can be freely adjusted. The length-adjustable worm shaft provides greater flexibility and adaptability and can be applied to equipment and mechanical transmission systems of different sizes and layouts. Users can adjust the length of the worm shaft according to specific needs to meet specific installation space and transmission ratio requirements. Since the design of the length-adjustable worm shaft allows users to freely adjust the length, it is more convenient during installation and maintenance. Users can adjust the length of the worm shaft according to actual needs without complicated processing or replacement of parts. The length-adjustable worm shaft is suitable for various mechanical equipment and systems that require transmission functions, such as conveying machinery, lifting equipment, industrial machine tools, etc. Its flexible design and adjustment function enable it to meet the needs of different industries and application fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the fixed section structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the connecting section of the utility model.

[0017] In the figure: 1 transmission shaft, 2 extension shaft, 21 fixed section, 211 fixed rod, 212 groove, 213 sleeve rod, 214 slide rod, 215 pressure plate, 216 movable plate, 217 trapezoidal plate, 218 plug rod, 219 spring, 22 connecting section, 221 sliding sleeve, 222 locking sleeve, 223 fixing bolt. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-3 In this embodiment, a transmission worm shaft includes a transmission shaft 1 and an extension shaft 2. The transmission shaft 1 and the extension shaft 2 are welded and fixed. The outer side of the transmission shaft 1 is provided with a threaded strip meshing with the worm gear. The extension shaft 2 includes a fixed section 21 and a connecting section 22. The connecting section 22 is used for fixing with the driving shaft. The distance between the fixed section 21 and the connecting section 22 is adjustable so that the length of the worm can be freely changed and the two are slidably connected.

[0020] The fixed section 21 includes a fixed rod 211 fixed to the left end of the transmission shaft 1, and the fixed rod 211 has a cylindrical groove 212 linearly opened to the right on its left side surface, and two sleeve rods 213 symmetrically distributed up and down are fixed to the right inner wall of the groove 212, and the inner sliding connection of the sleeve rod 213 is linearly connected to the sliding rod 214 that moves linearly and the two do not separate from each other, and two pressing plates 215 are fixed inside the groove 212, and the outer sides of the two sliding rods 214 are fixed with the same vertical movable plate 216, and a rectangular cavity is formed inside the movable plate 216, and springs 219 are fixed to the inner walls of the upper and lower sides of the cavity, and trapezoidal plates 217 are fixed to the opposite sides of the two springs 219, and two insertion rods 218 are fixed to the opposite sides of the two trapezoidal plates 217, and one end of the insertion rod 218 passes through the movable plate 216 and extends to the inner wall of the groove 212.

[0021] Among them, the length of the entire worm shaft can be adjusted to the longest and shortest states, and the trapezoidal plate 217 contacts the pressure plates 215 on the left and right sides respectively. At this time, the trapezoidal plate 217 will be subjected to the pressure of the pressure wheel on the pressure plate 215 and move away from each other, further causing the insertion rods 218 on both sides to move away from each other and be in a tight contact with the inner wall of the groove 212. At the same time, the spring 219 is in a contracted state, which is convenient for the resetting of the insertion rod 218 and subsequent adjustment. Therefore, under the action of the fixing bolt 223 and the four insertion rods 218, the sliding sleeve 221 and the fixing rod 211 are effectively fixed.

[0022] Among them, the connecting section 22 includes a sliding sleeve 221 that slides on the outside of the fixing rod 211, and a ring-shaped locking sleeve 222 is fixed to the outside of the sliding sleeve 221. Four screw holes are opened at the connection between the locking sleeve 222 and the sliding sleeve 221, and the outer side of the locking sleeve 222 is threadedly connected with a fixing bolt 223 that passes through the screw holes and fits with the fixing rod 211.

[0023] When the length of the entire worm shaft needs to be adjusted, the fixing bolt 223 is loosened, and the sliding sleeve 221 can slide on the outside of the fixing rod 211. When it slides to the specified position, the four fixing bolts 223 are fixed. At this time, the four fixing bolts 223 are fitted with the fixing rod 211 through the locking sleeve 222 to complete the fixation of the connecting section 22.

[0024] The inner walls of the sliding sleeve 221 are fixed to the two sliding rods 214 respectively, and the inner diameter of the sliding sleeve 221 is adapted to the outer diameter of the fixed rod 211. The positioning rods distributed on the left and right are fixed in the cavity of the movable plate 216. The two trapezoidal plates 217 are slidably connected to the two positioning rods. The pressure plate 215 includes a mounting plate, a bracket and a pressure wheel. The pressure wheel is rotatably connected to one end of the bracket, and the other end of the bracket is fixed to the mounting plate. The pressure wheel faces the direction of the trapezoidal plate 217. The two insertion rods 218 on the trapezoidal plate 217 are respectively located on the front and rear sides of the spring 219. The two springs 219 and the two sliding rods 214 are located on the same vertical line. The ends of the upper and lower insertion rods 218 that are away from each other are fixed with anti-slip rubber heads.

[0025] In the present application, when the pressing wheel contacts the trapezoidal plate 217, the trapezoidal plate 217 is limited by the positioning rod so that it can only move up and down.

[0026] The beneficial effect of the present application is that the extension shaft 2 is extended outside the transmission shaft 1 so that the length of the entire worm gear can be freely adjusted. The length-adjustable worm shaft provides greater flexibility and adaptability and can be suitable for equipment and mechanical transmission systems of different sizes and layouts. The user can adjust the length of the worm shaft according to specific needs to meet specific installation space and transmission ratio requirements. Since the design of the length-adjustable worm shaft allows the user to freely adjust the length, it is more convenient during installation and maintenance. The user can adjust the length of the worm shaft according to actual needs without complicated processing or replacement of parts. The length-adjustable worm shaft is suitable for various mechanical equipment and systems that require transmission functions, such as conveying machinery, lifting equipment, industrial machine tools, etc. Its flexible design and adjustment function enable it to meet the needs of different industries and application fields.

[0027] The working principle of the above embodiment is as follows: when it is necessary to adjust the length of the entire worm shaft, loosen the fixing bolt 223, and the sleeve 221 can slide on the outside of the fixing rod 211. When it slides to the specified position, the four fixing bolts 223 are fixed. At this time, the four fixing bolts 223 are fitted with the fixing rod 211 through the locking sleeve 222 to complete the fixation of the connecting section 22. The length of the entire worm shaft can be adjusted to the longest and shortest states, and the trapezoidal plate 217 is in contact with the pressure plates 215 on the left and right sides respectively. At this time, the trapezoidal plate 217 will be subjected to the pressure of the pressure wheel on the pressure plate 215 and move away from each other, further causing the insertion rods 218 on both sides to move away from each other, and be in a tight state with the inner wall of the groove 212. At the same time, the spring 219 is in a contracted state, which is convenient for the resetting of the insertion rod 218 and subsequent adjustment. Therefore, under the action of the fixing bolts 223 and the four insertion rods 218, the sleeve 221 and the fixing rod 211 are effectively fixed.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A transmission worm shaft, comprising a transmission shaft (1) and an extension shaft (2), characterized in that: The transmission shaft (1) and the extension shaft (2) are welded and fixed to each other. The outer side of the transmission shaft (1) is provided with a threaded strip meshing with the worm gear. The extension shaft (2) comprises a fixed section (21) and a connecting section (22). The connecting section (22) is used for fixing to the driving shaft. The distance between the fixed section (21) and the connecting section (22) is adjustable so that the length of the worm gear can be freely changed. The two are slidably connected. The fixed section (21) comprises a fixed rod (211) fixed to the left end of the transmission shaft (1); the fixed rod (211) has a cylindrical groove (212) linearly opened to the right on its left side surface; two sleeve rods (213) symmetrically distributed up and down are fixed to the right inner wall of the groove (212); the sleeve rods (213) are internally slidably connected to a linearly movable slide rod (214) and the two do not separate from each other; two pressing plates (215) are fixed inside the groove (212); the two sleeve rods (213) are internally slidably connected to a linearly movable slide rod (214) and the two sleeve rods (213) are internally slidably connected to the ... A vertical movable plate (216) is fixed to the outside of the slide bar (214), and a rectangular cavity is formed inside the movable plate (216). Springs (219) are fixed to the inner walls of the upper and lower sides of the cavity, and trapezoidal plates (217) are fixed to the opposite sides of the two springs (219). Two insertion rods (218) are fixed to the opposite sides of the two trapezoidal plates (217), and one end of the insertion rod (218) passes through the movable plate (216) and extends to the inner wall of the groove (212).

2. A transmission worm shaft according to claim 1, characterized in that: The connecting section (22) comprises a sliding sleeve (221) sliding on the outside of the fixing rod (211), a ring-shaped locking sleeve (222) is fixed on the outside of the sliding sleeve (221), four screw holes are provided at the connection between the locking sleeve (222) and the sliding sleeve (221), and a fixing bolt (223) penetrating the screw holes and fitting the fixing rod (211) is threadedly connected to the outside of the locking sleeve (222).

3. A transmission worm shaft according to claim 2, characterized in that: The inner wall of the sliding sleeve (221) is respectively fixed to the two sliding rods (214), and the inner diameter of the sliding sleeve (221) is matched to the outer diameter of the fixing rod (211).

4. The transmission worm shaft according to claim 1, characterized in that: Positioning rods distributed on the left and right are fixed to the cavity of the movable plate (216), and the two trapezoidal plates (217) are both slidably connected to the two positioning rods.

5. The transmission worm shaft according to claim 1, characterized in that: The pressing plate (215) comprises a mounting plate, a bracket and a pressing wheel, wherein the pressing wheel is rotatably connected to one end of the bracket, and the other end of the bracket is fixed to the mounting plate, and the pressing wheel faces the direction of the trapezoidal plate (217).

6. The transmission worm shaft according to claim 1, characterized in that: The two insertion rods (218) on the trapezoidal plate (217) are respectively located at the front and rear sides of the spring (219), the two springs (219) and the two slide rods (214) are located on the same vertical line, and the ends of the insertion rods (218) on the upper and lower sides that are away from each other are fixed with anti-slip rubber heads.

Images