Worm gear and worm anti-rotation type linear elevator device

Abstract

The utility model discloses a worm gear and worm anti-rotation type linear lifting machine device which comprises a transmission module, a lifting module, a supporting and fixing module and an anti-rotation module. The lifting module comprises a worm gear and a circular lead screw, and the worm gear is meshed with a worm; the supporting and fixing module comprises a shell, a worm gear end cover, a worm end cover, a bearing and a fixing screw. The anti-rotation module comprises a worm gear end cover, an anti-rotation protruding block, an inner hexagon screw, a square-head lead screw and a sleeve. Wherein for a round head screw rod type device, the anti-rotation module is designed to be of a detachable structure. The anti-rotation device can be applied to the scene where the lead screw needs to be prevented from rotating in the lifting process. The anti-rotation protruding block capable of being conveniently disassembled is arranged in the worm gear end cover, and the anti-rotation function of the lead screw is added. Rotation of the square-head lead screw is restrained through the external sleeve.

Description

Technical Field

[0001] This utility model relates to the field of anti-rotation mechanical technology, specifically to a worm gear anti-rotation linear lifting device. Background Technology

[0002] A worm gear jack is a power transmission mechanism commonly used for rotations where the worm gear and worm shaft are offset by 90°. It mainly consists of a worm gear, worm, lead screw, housing, bearings, and guide sleeves. It primarily utilizes the design of the helix angle and tooth ratio of the worm and worm gear to drive the worm wheel. The worm gear acts as the nut for the lead screw; the internal thread of the worm gear matches the external thread of the lifting lead screw to form the lifting component, converting rotational motion into linear motion. Under certain conditions, worm gear jacks can achieve a self-locking function and are characterized by their small size and low noise.

[0003] Worm gear jacks can achieve a self-locking function under certain conditions and are characterized by their small size and low noise. When the jack is working, a motor typically drives the worm to rotate, and the rotational motion is transmitted to the worm wheel through the meshing of the worm's helical teeth and the outer gear of the worm wheel. As the worm wheel rotates, the internal thread of the lead screw rotates linearly along the internal thread of the worm wheel, causing the jack to move vertically.

[0004] In the use of the above-mentioned lifting device, for some application scenarios, it is required that the screw does not rotate during the lifting process, and the traditional worm gear jack does not have this function. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a mechanical device for a worm gear anti-rotation linear jack.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a worm gear anti-rotation linear lifting device, comprising a transmission module, a lifting module, a support and fixing module, and an anti-rotation module.

[0007] The transmission module includes a worm gear;

[0008] The lifting module includes a worm gear and a circular lead screw, wherein the worm gear and the worm are meshed together.

[0009] The support and fixing module includes a housing, a worm gear end cap, a worm end cap, a bearing, and fixing screws;

[0010] The anti-rotation module includes a worm gear end cap, an anti-rotation protrusion, an internal hex screw, a square head screw, and a sleeve;

[0011] For the round-head lead screw type device, the anti-rotation module is designed as a detachable structure.

[0012] In a preferred embodiment of this invention, in the transmission module, the helical teeth of the worm are located inside the housing, and the shafts at both ends extend to the outside of the housing and are supported by bearings; the center distance of the worm wheel is equal to the axial distance of the worm, and it is placed inside the housing, driving the worm wheel to rotate through the worm gear of the worm.

[0013] In a preferred embodiment of this invention, the circular lead screw in the lifting module is placed vertically, and its external thread meshes with the inner worm gear of the worm wheel. When the worm wheel is driven to rotate, the circular lead screw rises or falls along the inner thread of the worm wheel.

[0014] In a preferred embodiment of this invention, the housing of the support and fixing module has openings in both the vertical and horizontal directions, allowing the shafts of the worm and the lead screw to pass through the openings for fixing the worm wheel end cap and the worm end cap; the worm and the worm wheel end cap are fixed to the housing by the fixing screws to restrict the axial movement of the worm and the worm wheel; the bearings are installed at the shaft ends of the worm and the lead screw.

[0015] In a preferred embodiment of this invention, when the anti-rotation module is used for a round-headed lead screw type device, the worm gear end cover has ten threaded holes. Six of these threaded holes are screwed into hexagonal socket head caps to fix the worm gear end cover to the top of the housing. The other four threaded holes are located on the top of the worm gear end cover for fastening the worm gear end cover and the anti-rotation protrusion. The anti-rotation protrusion has four threaded holes and an inner protrusion. Further, the anti-rotation protrusion is placed inside the worm gear end cover, with the threaded holes on the anti-rotation protrusion aligned with the threaded holes on the top of the worm gear end cover. The hexagonal socket head cap is used to fix the anti-rotation protrusion inside the worm gear end cover. The hexagonal socket head cap is used to fasten the anti-rotation protrusion in the worm gear end cover, preventing the anti-rotation protrusion from falling off or rotating. Furthermore, a vertical groove is formed at the external thread of the round lead screw. The round lead screw passes through the central hole of the anti-rotation protrusion, and the outer groove of the round lead screw engages with the inner protrusion of the anti-rotation protrusion. Because the anti-rotation protrusion is fixed in position, it prevents the round lead screw from rotating during lifting and lowering.

[0016] As a preferred embodiment of this utility model, the detachable structure of the anti-rotation module will gradually wear down as the anti-rotation protrusion wears down over time. When the anti-rotation protrusion is severely worn, the worm gear end cover can be removed from the housing, the screws connecting the worm gear end cover and the anti-rotation protrusion can be removed, the anti-rotation protrusion inside the worm gear end cover can be removed, and a new anti-rotation protrusion can be installed and then re-fixed with screws.

[0017] As a preferred embodiment of this utility model, when the anti-rotation module is used for a square-headed lead screw type device, the four threaded holes on the top of the worm gear end cap are used to fasten the worm gear end cap and the sleeve; the upper part of the sleeve has a square hole and the lower part has a round hole, which can be used to fit the square-headed lead screw; the base has four threaded holes, which can be aligned with the threaded holes on the worm gear end cap to fix its position; the upper part of the square-headed lead screw is square and the lower part is round and has threads; when the square-headed lead screw is put into the sleeve, the head of the square-headed lead screw is located in the square hole of the sleeve; when the square-headed lead screw rotates, it is restricted by the square hole, thereby constraining the rotation of the square-headed lead screw.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model can be applied to scenarios where it is necessary to prevent the lead screw from rotating during lifting. An easily removable anti-rotation protrusion is built into the worm gear end cap to enhance the anti-rotation function of the lead screw. An external sleeve constrains the rotation of the square-headed lead screw.

[0020] 2. In this utility model, the anti-rotation protrusion in the device using a round lead screw will wear during use. When the wear is severe, the worn anti-rotation protrusion inside the worm gear end cover can be replaced with a new part by removing the screws, thereby reducing the maintenance cost of the device during use. Attached Figure Description

[0021] Figure 1 This is the overall structural diagram of the round-headed lead screw type device of this utility model;

[0022] Figure 2 This is an external view of the round-headed lead screw type device of this utility model;

[0023] Figure 3 This is the overall structural diagram of the square-headed lead screw type device of this utility model;

[0024] Figure 4 This is an appearance drawing of the square-headed lead screw type device of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal transmission module of this utility model;

[0026] Figure 6 This is a diagram illustrating the internal lifting module of this utility model;

[0027] Figure 7 This is a diagram illustrating the internal anti-rotation protrusion and screw combination structure of the round-headed lead screw type device of this utility model;

[0028] Figure 8 This is a diagram showing the anti-rotation protrusion inside the round-headed lead screw type device of this utility model;

[0029] Figure 9This is a diagram showing the interior of the worm gear end cap of the round-headed lead screw type device of this utility model;

[0030] Figure 10 This is a structural diagram of the anti-rotation module of the round-headed lead screw type device of this utility model;

[0031] Figure 11 This is a schematic diagram of the combined structure of the sleeve and the square-headed lead screw of the present invention.

[0032] Figure 12 This is a diagram showing the internal structure of the sleeve opening of the square-headed lead screw type device of this utility model.

[0033] In the diagram: 1. Round lead screw; 2. Groove; 3. Socket head screw; 4. Worm; 5. Worm end cap; 6. Worm wheel end cap; 7. Housing; 8. Anti-rotation protrusion; 9. Bearing; 10. Worm wheel; 11. Sleeve; 12. Square head lead screw. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 1 to 12 As shown, the present invention provides a worm gear anti-rotation linear lifting device, including a transmission module, a lifting module, a support and fixing module, and an anti-rotation module.

[0036] The transmission module includes the worm gear 4;

[0037] The lifting module includes a worm gear 10 and a circular lead screw 1, wherein the worm gear 10 and the worm 4 are meshed together;

[0038] The support and fixing module includes a housing 7, a worm gear end cover 6, a worm end cover 5, a bearing 9, and fixing screws;

[0039] The anti-rotation module includes a worm gear end cap 6, an anti-rotation protrusion 8, an internal hex screw 3, a square head screw 12, and a sleeve 11;

[0040] For round-head lead screw type devices, the anti-rotation module is designed as a detachable structure for replacing worn parts.

[0041] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6In the transmission module, the helical teeth of the worm 4 are located inside the housing 7, and the shafts at both ends extend to the outside of the housing 7 and are supported by bearings 9. The center distance of the worm wheel 10 is equal to the center distance of the worm 4 and is placed inside the housing 7. The worm wheel 10 is driven to rotate by the worm gear of the worm 4. The housing 7 has two pairs of small holes symmetrically opened vertically and horizontally. The bearings 9 are placed at the openings to support the worm 4 and the circular lead screw 1. The worm wheel end cover 6 and the worm end cover 5 cooperate with the bearings 9 to fix the circular lead screw 1 and the worm 4 inside the housing 7 to ensure working stability. The fixing screws are used to fix the worm wheel end cover 6 and the worm end cover 5.

[0042] refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 In the lifting module, the circular lead screw 1 is placed vertically, and its external thread meshes with the internal worm gear of the worm wheel 10. The two shafts of the worm 4 and the worm wheel 10 are intersected at 90°, and their concave and convex tooth profiles mesh. When the worm wheel 10 is driven to rotate, its teeth slide along the helical surface of the worm 4 and make a circular motion around the central axis, thereby causing the circular lead screw 1 to rise or fall along the internal thread of the worm wheel 10. The external helix of the circular lead screw 1 cooperates with the internal helix of the worm wheel 10. When the worm wheel 10 rotates, the thread of the circular lead screw 1 and the internal helical groove of the worm wheel 10 generate friction, causing the circular lead screw 1 to move along the axial direction.

[0043] refer to Figure 7 and Figure 8 In the support and fixing module, the housing 7 has openings in the vertical and horizontal directions to facilitate the passage of the worm 4 and the circular lead screw 1 shafts. The worm wheel end cover 6 and the worm end cover 5 are fixed to the housing 7 by fixing screws to restrict the axial movement of the worm 4 and the worm wheel 10. The bearing 9 is installed on the shaft ends of the worm 4 and the circular lead screw 1 to reduce rotational friction.

[0044] refer to Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 10 When the anti-rotation module is used for a round-headed lead screw type device, the worm gear end cover 6 has ten threaded holes. Six of them are screwed into the hexagon socket head cap screws 3 to fix the worm gear end cover 6 to the top of the housing 7. The other four are used to fasten the worm gear end cover 6 and the anti-rotation protrusion 8. The anti-rotation protrusion 8 is placed inside the worm gear end cover 6 and has four threaded holes. The inner protrusion part is engaged with the groove 2 on the round lead screw 1. The anti-rotation protrusion 8 is fixed inside the worm gear end cover 6 with the hexagon socket head cap screws 3 to prevent it from falling off and rotating. The vertical groove 2 at the external thread of the round lead screw 1 is engaged with the inner protrusion of the anti-rotation protrusion 8 to prevent the round lead screw 1 from rotating during the lifting and lowering process.

[0045] refer to Figure 2 , Figure 9 and Figure 10Regarding the detachable structure of the anti-rotation module, as the usage time increases, the anti-rotation protrusion 8 wears more severely. The threaded hole on the top of the worm gear end cover 6 is aligned with the threaded hole of the anti-rotation protrusion 8 and fixed with an internal hex screw 3. Because of the convex-concave fit between the anti-rotation protrusion 8 and the groove 2, the circular lead screw 1 is prevented from rotating, so that it can only move in a straight line along the shaft. When the wear is severe, remove the internal hex screw 3 on the top of the worm gear end cover 6, take out the worn anti-rotation protrusion 8, replace it with a new one and re-fix it, and the device can be restored to normal operation.

[0046] refer to Figure 11 When the anti-rotation module is used for square-headed lead screw type devices, the four threaded holes on the top of the worm gear end cap 6 are used to fasten the worm gear end cap 6 and the sleeve 11. The upper part of the sleeve 11 is a square hole, and the lower part is a round hole, which is used to fit the square-headed lead screw 12. The four threaded holes on its base are aligned with and fixed to the threaded holes on the worm gear end cap 6. The upper part of the square-headed lead screw 12 is square, and the lower part is round and threaded. After being put into the sleeve 11, the head is located in the square hole of the sleeve 11. When rotating, it is restricted by the square hole, thus constraining the rotation. The difference between the rod-type device and the round-head screw-type device is that the anti-rotation module removes the anti-rotation protrusion 8, adds a sleeve 11, and replaces the round-head screw 1 with a square-head screw 12. When in use, first assemble the square-head screw 12 into the device, then insert the sleeve 11 into the base, and use fixing screws to fix the base of the sleeve 11 to the worm gear end cap 6. When the square-head screw 12 moves, the square head of the screw 12 is fitted into the square hole of the sleeve 11, preventing rotation during the movement, and the top of the square-head screw 12 is always in the square hole of the sleeve 11.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A worm gear anti-rotation linear lifting device, comprising a transmission module, a lifting module, a support and fixing module, and an anti-rotation module, characterized in that: The transmission module includes a worm gear (4). The lifting module includes a worm gear (10) and a circular lead screw (1), wherein the worm gear (10) and the worm (4) are meshed together; The support and fixing module includes a housing (7), a worm gear end cap (6), a worm end cap (5), a bearing (9), and fixing screws; The anti-rotation module includes a worm gear end cap (6), an anti-rotation protrusion (8), an internal hex screw (3), a square head screw (12), and a sleeve (11). For the round-head lead screw type device, the anti-rotation module is designed as a detachable structure.

2. The worm gear anti-rotation linear jacking device according to claim 1, characterized in that: In the transmission module, the helical teeth of the worm (4) are located inside the housing (7), and the shafts at both ends extend to the outside of the housing (7) and are supported by bearings (9); the center distance of the worm wheel (10) is equal to the center distance of the worm (4), and it is placed inside the housing (7), and the worm wheel (10) is driven to rotate by the worm gear of the worm (4).

3. The worm gear anti-rotation linear lifting device according to claim 1, characterized in that: In the lifting module, the circular lead screw (1) is placed vertically, and its external thread meshes with the internal worm wheel of the worm wheel (10). When the worm wheel (10) is driven to rotate, the circular lead screw (1) rises or falls along the internal thread of the worm wheel (10).

4. The worm gear anti-rotation linear jacking device according to claim 1, characterized in that: In the support and fixing module, the housing (7) has openings in both the vertical and horizontal directions, which allow the shafts of the worm (4) and the circular lead screw (1) to pass through the openings for fixing the worm wheel end cap (6) and the worm end cap (5); the worm (4) and the worm wheel end cap (6) are fixed to the housing (7) by the fixing screws to restrict the axial movement of the worm (4) and the worm wheel (10); the bearing (9) is installed on the shaft ends of the worm (4) and the circular lead screw (1).

5. The worm gear anti-rotation linear jack device according to claim 1, characterized in that: When the anti-rotation module is used for a round-head screw type device, the worm gear end cover (6) has ten threaded holes. Six of these threaded holes are screwed into hexagon socket screws (3) to fix the worm gear end cover (6) to the top of the housing (7). The other four threaded holes are located on the top of the worm gear end cover (6) to fasten the worm gear end cover (6) and the anti-rotation protrusion (8). The anti-rotation protrusion (8) has four threaded holes and a protrusion on its inner side. Furthermore, the anti-rotation protrusion (8) is placed inside the worm gear end cover (6), and the threaded holes on the anti-rotation protrusion (8) are aligned with the threaded holes on the top of the worm gear end cover (6). Align and fix the anti-rotation protrusion (8) inside the worm gear end cover (6) with an internal hex screw (3); the internal hex screw (3) is used to fasten the anti-rotation protrusion (8) in the worm gear end cover (6) to prevent the anti-rotation protrusion (8) from falling off and rotating; furthermore, the external thread of the circular lead screw (1) has a vertical groove (2), the circular lead screw (1) passes through the center hole of the anti-rotation protrusion (8), the outer groove of the circular lead screw (1) is combined with the inner protrusion of the anti-rotation protrusion (8), and the anti-rotation protrusion (8) is fixed in position, thereby preventing the circular lead screw (1) from rotating during the lifting process.

6. The worm gear anti-rotation linear jack device according to claim 1, characterized in that: During use, the wear of the anti-rotation protrusion (8) gradually increases with the increase of the usage time. When the anti-rotation protrusion (8) is severely worn, the worm gear end cover (6) can be removed from the housing (7), the screw (3) connecting the worm gear end cover (6) and the anti-rotation protrusion (8) can be removed, the anti-rotation protrusion (8) inside the worm gear end cover (6) can be removed, and a new anti-rotation protrusion (8) can be installed and then re-fixed with screws (3).

7. The worm gear anti-rotation linear jack device according to claim 1, characterized in that: When the anti-rotation module is used for a square-headed screw type device, the four threaded holes on the top of the worm gear end cap (6) are used to fasten the worm gear end cap (6) and the sleeve (11); the upper part of the sleeve (11) has a square hole and the lower part has a round hole, which can fit the square-headed screw (12). The base has four threaded holes, which can be aligned with the threaded holes on the worm gear end cap (6) to fix its position. The upper part of the square-headed screw (12) is square and the lower part is round and has threads. When the square-headed screw (12) is put into the sleeve (11), the head of the square-headed screw (12) is located in the square hole of the sleeve (11). When the square-headed screw (12) rotates, it is restricted by the square hole, thereby constraining the rotation of the square-headed screw (12).

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