Large-torque high-precision worm gear box

Abstract

This utility model relates to the field of worm gearboxes and discloses a high-torque, high-precision worm gearbox. It includes a housing, a worm gear assembly, a worm shaft assembly, and an input assembly. The worm gear assembly, worm shaft assembly, and input assembly are all rotatably connected to the housing. Two sets of worm shaft assemblies are provided, located on opposite sides of the worm gear assembly, and both sets mesh with the worm gear assembly. Each set of worm shaft assemblies can be moved, adjusted, and fixed along its own axis on the housing to ensure close contact with the worm gear assembly. Both sets of worm shaft assemblies are connected to the input assembly, which is adapted to be connected to a drive source to drive the two sets of worm shaft assemblies to rotate. This utility model features two worm shaft assemblies located on opposite sides of the worm gear body. After the two worm shaft assemblies move and adjust in opposite directions and contact the worm gear body, the worm gearbox maintains high transmission accuracy in both forward and reverse rotation, ensuring the stability of the transmission after adjustment.

Description

Technical Field

[0001] This utility model relates to the field of worm gear box technology, and more specifically, to a high-torque, high-precision worm gear box. Background Technology

[0002] Worm gearboxes are widely used in high-torque transmission applications due to their advantages such as high output torque and low noise. A worm gearbox includes a housing, a worm wheel, a worm, and an output shaft. The output shaft is rotatably located inside the housing. The worm wheel is fitted onto the output shaft and keyed to achieve synchronous rotation. The worm and worm wheel are arranged at 90° angles, meshing with each other. The worm is rotatably mounted inside the housing, with one end protruding as an input shaft. The rotation of the worm drives the output shaft. In some high-torque transmission scenarios requiring reciprocating forward and reverse rotation, the worm and worm wheel experience significant wear, leading to increased clearance between their meshing teeth, affecting transmission accuracy and resulting in reduced transmission precision. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model provides a high-torque, high-precision worm gear box, comprising a box body, a worm gear assembly, a worm assembly, and an input assembly. The worm gear assembly, the worm assembly, and the input assembly are all rotatably connected to the box body. Two sets of worm assemblies are provided, each located on one side of the worm gear assembly, and both sets mesh with the worm gear assembly. Each set of worm assemblies is movable, adjustable, and fixed along its own axis on the box body to ensure close contact with the worm gear assembly. Both sets of worm assemblies are connected to the input assembly, which is adapted to be connected to a drive source to drive the two sets of worm assemblies to rotate.

[0004] Optionally, the worm gear assembly includes a worm gear body and an adjustment group. The adjustment group is provided in two sets, which are respectively located on both sides of the housing. The worm gear body is located inside the housing, and both ends of the worm gear body are respectively connected to the two adjustment groups. The adjustment group is adapted to drive the worm gear body to move and adjust along its own axis.

[0005] Optionally, the adjustment assembly includes a flange and an adjustment end cover. The outer wall of the housing has a mounting hole that penetrates the housing. The flange is inserted into the mounting hole and fixedly connected to the housing. The worm gear body is rotatably inserted into the flange. The adjustment end cover is located at the end of the worm gear body. The adjustment end cover is inserted into the flange and threadedly connected to the flange. After the adjustment end cover rotates, it is suitable for pushing the worm gear body to move.

[0006] Optionally, the worm gear body is provided with a bearing, which is inserted into the flange and abuts against the adjusting end cover. After the adjusting end cover is rotated, it drives the bearing to move the worm gear body.

[0007] Optionally, one side of the flange protrudes from the mounting hole and is located outside the housing.

[0008] Optionally, the adjusting end cover is provided with a driving hole, which is adapted to cooperate with a tool to drive the adjusting end cover to rotate.

[0009] Optionally, the input assembly includes an input shaft and a drive gear. One end of the input shaft is located inside the housing, and the other end extends out of the housing. The drive gear is located inside the housing and is connected to the input shaft for synchronous rotation. The worm gear assembly also includes a driven gear, which is sleeved on the worm body and rotates synchronously with the worm body. The drive gear is located between the two driven gears, and both driven gears mesh with the drive gear.

[0010] Optionally, the worm gear assembly includes a worm gear body and an output shaft. The worm gear body is located inside the housing, and the output shaft is rotatably disposed inside the housing, with one end of the output shaft extending out of the housing. The worm gear body is sleeved on the output shaft and rotates synchronously with the output shaft. Two worm bodies are located on both sides of the worm gear body, and both worm bodies mesh with the worm gear body.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] 1. When there is a gap between the worm wheel body and the worm body, the entire worm assembly is driven to move along its own axis to contact the worm wheel body, thereby canceling the gap and ensuring transmission accuracy. The two worm assemblies are located on both sides of the worm wheel body, and after the two worm assemblies move in opposite directions to adjust and contact the worm wheel body, the worm gear box has high transmission accuracy in both forward and reverse rotation.

[0013] 2. When it is necessary to move and adjust one of the worm gear bodies, simply drive the two adjustment end covers corresponding to the worm gear body to move. The operation is simple and convenient. After the adjustment end covers are adjusted, they maintain a stable threaded connection with the flange, so that the worm gear body remains relatively stable after movement and adjustment, ensuring the stability of the transmission after adjustment.

[0014] 3. The flange can increase the wall thickness of the housing, giving the adjustment end cover a longer adjustment range, so as to ensure that the worm gear body can maintain a good contact relationship with the worm wheel body after adjustment.

[0015] 4. Because two worm gear bodies are set, after the drive source drives the input shaft to rotate, the setting of the driving gear and two driven gears enables the two worm gear bodies to rotate in the same direction, so that the worm wheel body can rotate smoothly under the drive of the two worm gear bodies. Attached Figure Description

[0016] Figure 1 The structure of the worm gear box in this embodiment of the utility model Figure 1 ;

[0017] Figure 2 This is a cross-sectional view of the worm gear box in an embodiment of this utility model;

[0018] Figure 3 The structure of the worm gear box in this embodiment of the utility model Figure 2 ;

[0019] Figure 4 This is an exploded view of the housing and worm gear assembly in an embodiment of this utility model;

[0020] Figure 5 This is a structural diagram of the worm gear body, worm assembly, and input assembly in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Worm gear assembly; 21. Worm gear body; 22. Output shaft; 3. Worm gear assembly; 31. Worm gear body; 32. Adjustment group; 321. Flange; 322. Adjustment end cover; 33. Bearing; 34. Driven gear; 4. Input assembly; 41. Input shaft; 42. Drive gear. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-5 This application will be described in further detail.

[0023] The accompanying drawings of this utility model embodiment provide a coordinate system XYZ, where the positive direction of the X-axis represents the right, the negative direction of the X-axis represents the left, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0024] This utility model embodiment provides a high-torque, high-precision worm gear box, see reference. Figure 1 and Figure 2The high-torque, high-precision worm gearbox includes a housing 1, a worm gear assembly 2, a worm assembly 3, and an input assembly 4. The worm gear assembly 2, worm assembly 3, and input assembly 4 are all rotatably connected to the housing 1. Two sets of worm assemblies 3 are provided, located on the upper and lower sides of the worm gear assembly 2 respectively, and both sets mesh with the worm gear assembly 2. Each set of worm assemblies 3 can be moved and adjusted along its own axis on the housing 1, and after adjustment, each set of worm assemblies 3 can be fixed and limited to ensure close contact with the worm gear assembly 2, improving the transmission accuracy of the worm gearbox. Both sets of worm assemblies 3 are connected to the input assembly 4, which is adapted to be connected to a drive source to drive the two sets of worm assemblies 3 to rotate.

[0025] The axial direction of the worm gear assembly 3 is perpendicular to the axial direction of the worm wheel assembly 2. That is, the axial direction of the worm wheel assembly 2 is the front-to-back direction of the housing 1, and the axial direction of the worm gear assembly 3 is the left-to-right direction of the housing 1.

[0026] Reference Figure 2 and Figure 3 The top of housing 1 is open. After the worm gear assembly 2, worm gear assembly 3, and input assembly 4 are assembled with housing 1, a cover plate is bolted to the top of housing 1 to cover the opening. Worm gear assembly 2 includes a worm gear body 21 and an output shaft 22. The worm gear body 21 is completely located inside housing 1, while the output shaft 22 is rotatably located inside housing 1, but one end of the output shaft 22 extends out from the front end of housing 1 to facilitate cooperation with other transmission devices to drive their rotation. The worm gear body 21 is fitted onto the output shaft 22 and keyed to achieve synchronous rotation.

[0027] The two sets of worm gear assemblies 3 have the same structure. The following explanation will take one set of worm gear assembly 3 as an example.

[0028] Reference Figure 2 and Figure 4 The worm gear assembly 3 includes a worm body 31 and an adjusting assembly 32. The worm body 31 is rotatably disposed inside the housing 1 and meshes with the worm wheel body 21, so that the rotation of the worm body 31 can drive the worm wheel body 21 to rotate. Two adjusting assemblies 32 are provided, located on the left and right sides of the housing 1 respectively, and at opposite ends of the corresponding worm body 31 in the axial direction, and connected to the worm body 31. The adjusting assembly 32 is adapted to drive the corresponding worm body 31 to move and adjust along its own axial direction, so that the worm body 31 can fit against the worm wheel body 21 to eliminate gaps.

[0029] Since the worm gear assembly 3 has two identical sets, the two worm bodies 31 are located on both sides of the worm wheel body 21, and both worm bodies 31 mesh with the worm wheel body 21. When the two worm bodies 31 are moved away from or closer to each other, and both worm bodies 31 are in contact with the worm wheel body 21, the worm gear box can have high transmission accuracy regardless of whether it rotates forward or backward.

[0030] Reference Figure 2 and Figure 4 The adjusting assembly 32 includes a flange 321 and an adjusting end cover 322. A mounting hole is provided on the outer wall of the left side of the housing 1, extending through the housing 1 in a left-right direction. Two flanges 321 are inserted into the corresponding mounting holes from the left and right sides of the housing 1, respectively. The side of the flange 321 facing away from the housing 1 protrudes from the mounting hole and is located outside the housing 1, thus increasing the wall thickness of the housing 1. The flanges 321 are welded to the housing 1. Both ends of the worm gear body 31 are inserted into the two flanges 321, and the worm gear body 31 can rotate relative to the flanges 321. The adjusting end cover 322 is inserted into the corresponding flange 321 and threadedly connected to the flange 321. The two adjusting end covers 322 are located at the two ends of the worm body 31 respectively. Therefore, when the two adjusting end covers 322 are rotated to move in the same direction, the corresponding worm body 31 can be pushed to move and adjust along its own axial direction, thereby making the worm body 31 and the worm wheel body 21 fit tightly together.

[0031] Both ends of the worm body 31 form a stepped shaft with the middle part of the worm body 31, meaning the outer diameter of the middle part of the worm body 31 is larger than the outer diameters of both ends. Bearings 33 are fitted at both ends of the worm body 31 and are inserted into the flange 321, allowing the worm body 31 to rotate smoothly relative to the flange 321. The adjusting end cover 322 contacts the corresponding bearing 33; rotation of the adjusting end cover 322 pushes the bearing 33 to move, and the bearing 33, under the stepped action, drives the entire worm body 31 to move.

[0032] Two drive holes are spaced apart on the outer wall of the adjusting end cover 322. When the adjusting end cover 322 is driven to rotate, a suitable tool can be inserted into the two drive holes to drive the adjusting end cover 322 to rotate.

[0033] Combination Figure 2 Reference Figure 4 and Figure 5The input component 4 is located on the right side of the housing 1, and includes an input shaft 41 and a drive gear 42. The input shaft 41 is rotatably connected to the housing 1, with one end located inside the housing 1 and the other end extending through the housing 1 and cantilevered on the right side of the housing 1 to cooperate with the drive source. The drive gear 42 is located inside the housing 1 and is keyed to the input shaft 41 to achieve synchronous rotation.

[0034] Combination Figure 2 Reference Figure 4 and Figure 5 The worm gear assembly 3 also includes a driven gear 34, which is located inside the housing 1 and sleeved on the end of the worm body 31. The driven gear 34 is located on the side of the worm body 31 where the bearing 33 is away from the corresponding adjusting end cover 322. The driven gear 34 is keyed to the worm body 31 to achieve synchronous movement. When the adjusting end cover 322 pushes the bearing 33 to move the worm body 31, the driven gear 34 will also move synchronously with the worm body 31 under the step-like action of the worm body 31.

[0035] Two driven gears 34 are located on the upper and lower sides of the driving gear 42, respectively, and both driven gears 34 mesh with the driving gear 42. When the input shaft 41 rotates, the driving gear 42 drives the two driven gears 34 to rotate, which in turn drives the two worm gear bodies 31 to rotate, thereby driving the worm wheel body 21 and the output shaft 22 to rotate.

[0036] The implementation principle of a high-torque, high-precision worm gearbox according to an embodiment of this application is as follows: Adjusting the adjusting end caps 322 at corresponding ends of the two worm bodies 31 respectively drives the two worm bodies 31 to move towards or away from each other, so that the two worm bodies 31 can contact the worm wheel body 21, canceling the gap and ensuring transmission accuracy. The two worm assemblies 3 are located on both sides of the worm wheel body 21, and after the two worm assemblies 3 move and adjust in opposite directions and contact the worm wheel body 21, the worm gearbox has high transmission accuracy in both forward and reverse rotation. After adjustment, the adjusting end caps 322 maintain a stable threaded connection with the flange 321, ensuring that the worm bodies 31 remain relatively stable after movement and adjustment. The setting of the driving gear 42 and the two driven gears 34 enables the two worm bodies 31 to rotate in the same direction, allowing the worm wheel body 21 to rotate smoothly under the drive of the two worm bodies 31.

[0037] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0038] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0039] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0041] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A high-torque, high-precision worm gearbox, characterized in that: The assembly includes a housing (1), a worm gear assembly (2), a worm shaft assembly (3), and an input assembly (4). The worm gear assembly (2), the worm shaft assembly (3), and the input assembly (4) are all rotatably connected to the housing (1). There are two sets of worm shaft assemblies (3), which are located on both sides of the worm gear assembly (2) and mesh with the worm gear assembly (2). Each set of worm shaft assemblies (3) can be moved, adjusted, and fixed along its own axis on the housing (1) to be in close contact with the worm gear assembly (2). Both sets of worm shaft assemblies (3) are connected to the input assembly (4), which is adapted to be connected to a drive source to drive the two sets of worm shaft assemblies (3) to rotate.

2. The high-torque, high-precision worm gearbox according to claim 1, characterized in that: The worm gear assembly (3) includes a worm body (31) and an adjustment group (32). The adjustment group (32) is provided in two sets, which are located on both sides of the housing (1). The worm body (31) is located inside the housing (1), and both ends of the worm body (31) are connected to the two adjustment groups (32). The adjustment group (32) is adapted to drive the worm body (31) to move and adjust along its own axis.

3. The high-torque, high-precision worm gearbox according to claim 2, characterized in that: The adjustment assembly (32) includes a flange (321) and an adjustment end cover (322). The outer side wall of the housing (1) is provided with a mounting hole, which penetrates the housing (1). The flange (321) is inserted into the mounting hole and fixedly connected to the housing (1). The worm gear body (31) is rotatably inserted into the flange (321). The adjustment end cover (322) is located at the end of the worm gear body (31). The adjustment end cover (322) is inserted into the flange (321) and threadedly connected to the flange (321). After the adjustment end cover (322) rotates, it is suitable for pushing the worm gear body (31) to move.

4. The high-torque, high-precision worm gearbox according to claim 3, characterized in that: The worm gear body (31) is provided with a bearing (33), which is inserted into the flange (321). The bearing (33) abuts against the adjusting end cover (322). After the adjusting end cover (322) rotates, it drives the bearing (33) to move the worm gear body (31).

5. The high-torque, high-precision worm gearbox according to claim 3, characterized in that: The flange (321) protrudes from the mounting hole on one side and is located outside the housing (1).

6. The high-torque, high-precision worm gearbox according to claim 3, characterized in that: The adjusting end cap (322) is provided with a driving hole, which is adapted to cooperate with a tool to drive the adjusting end cap (322) to rotate.

7. The high-torque, high-precision worm gearbox according to any one of claims 2-6, characterized in that: The input component (4) includes an input shaft (41) and a drive gear (42). One end of the input shaft (41) is located inside the housing (1), and the other end extends out of the housing (1) and is suspended. The drive gear (42) is located inside the housing (1) and is connected to the input shaft (41) and rotates synchronously. The worm gear assembly (3) also includes a driven gear (34). The driven gear (34) is sleeved on the worm body (31) and rotates synchronously with the worm body (31). The drive gear (42) is located between the two driven gears (34), and both driven gears (34) mesh with the drive gear (42).

8. The high-torque, high-precision worm gearbox according to claim 7, characterized in that: The worm gear assembly (2) includes a worm gear body (21) and an output shaft (22). The worm gear body (21) is located inside the housing (1). The output shaft (22) is rotatably disposed inside the housing (1), and one end of the output shaft (22) extends out of the housing (1). The worm gear body (21) is sleeved on the output shaft (22) and rotates synchronously with the output shaft (22). Two worm bodies (31) are located on both sides of the worm gear body (21), and both worm bodies (31) mesh with the worm gear body (21).

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