Combined worm

Abstract

The utility model discloses a combined worm which comprises a worm gear shaft sleeve, a worm shaft center and a fixed sleeve joint piece, an extension part is arranged at one end of the worm gear shaft sleeve, a first through channel is reserved in the worm gear shaft sleeve, the first through channel simultaneously penetrates through the extension part, and the worm shaft center is sleeved into the first through channel. A first through channel is reserved in the fixed sleeving piece, a first chamfer is arranged at an opening in one end of the first through channel, a second through channel is reserved in the fixed sleeving piece, a second chamfer is arranged at the edge of the top of the fixed sleeving piece, the worm center is sleeved with the second through channel, the first chamfer and the second chamfer abut against each other and are attached to each other, and a first mounting hole is formed in the side end of the fixed sleeving piece. The worm shaft center is sleeved into the first penetrating channel to perform primary concentric alignment positioning, and the second chamfer angle on the fixed sleeving piece is matched with the first chamfer angle in an abutting manner to perform secondary concentric alignment positioning, so that the worm shaft center and the worm gear shaft sleeve are mounted in a precise matching manner, and the equipment running process and the production quality are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of worm gear structures, specifically a combined worm gear. Background Technology

[0002] A worm gear is a gear with one or more helical teeth that meshes with a worm wheel to form an interlocking gear pair. In general worm gear drives, the worm is the driving element. During operation, the worm wheel teeth slide and roll along the helical surface of the worm. Existing worm gears use a one-piece fixed structure. When the helical teeth of the worm are damaged or need to be replaced with helical teeth of different tooth profiles, the entire worm needs to be disassembled for replacement, which is inconvenient, time-consuming, and labor-intensive. There are also modular worm gear structures in existing technology, which at least include a worm shaft and a gear sleeve, installed by fitting together. However, this combination method requires extremely high precision. If there is a precision deviation, high-frequency vibration will occur when the worm shaft and the gear sleeve rotate out of alignment, affecting the operation of the equipment and the quality of production. Utility Model Content

[0003] The purpose of this invention is to provide a combined worm gear that solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a combined worm gear, comprising a worm gear bushing, a worm shaft, and a fixing sleeve that are fitted together.

[0005] The worm gear bushing has an extension at one end, and a first through channel adapted to the shape of the worm shaft is provided on the worm gear bushing. The first through channel also passes through the extension. The worm shaft is fitted into the first through channel, and the opening of the first through channel near the extension is provided with a first chamfer.

[0006] The fixed sleeve has a second through channel that matches the shape of the worm shaft. The top edge of the fixed sleeve has a second chamfer that matches the shape of the first chamfer. The worm shaft is inserted into the second through channel, and the first chamfer and the second chamfer abut against each other.

[0007] The fixed sleeve has a mounting hole on its side.

[0008] Preferably, the fixing sleeve is further provided with an annular stop portion, and an annular groove is formed between the annular stop portion and the fixing sleeve, and the annular groove is adapted to the shape of the extension portion, and the annular groove is sleeved with the extension portion.

[0009] Preferably, a baffle is provided on the worm shaft, and the end of the worm gear sleeve away from the extension is in contact with the baffle.

[0010] Preferably, the baffle is provided with two symmetrically arranged U-shaped notches, and the end of the worm gear bushing that abuts against the baffle is provided with two mounting holes, and the two mounting holes correspond to the positions of the two U-shaped notches.

[0011] Preferably, the axis of the fixed sleeve forms an angle with the first chamfer, and the angle range of the angle is 30° to 60°.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model features a fixed sleeve and a first chamfer at the end of the first through channel. The worm shaft is fitted into the first through channel for initial concentric alignment and positioning. A second concentric alignment and positioning is achieved by the second chamfer on the fixed sleeve engaging with the first chamfer. This ensures precise fit between the worm shaft and the worm gear sleeve, improving the smoothness of equipment operation and enhancing production quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0015] Figure 2 This is an exploded view of the structure of the first embodiment of the present invention;

[0016] Figure 3 This is a partial structural schematic diagram of the first embodiment of the present utility model;

[0017] Figure 4 This is a cross-sectional view of the first embodiment of the present invention. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 4 The first embodiment provided by this utility model is a combined worm gear, which includes a worm gear sleeve 1, a worm shaft 2 and a fixed sleeve 3 that are fitted together. The worm shaft 2 serves as the rotation center axis of the worm. After being fixedly combined with the worm gear sleeve 1, it forms a complete worm gear structure that can mesh with an external worm wheel.

[0020] The worm gear sleeve 1 has an extension 4 at one end. The worm gear sleeve 1 has a first through channel 5 that matches the shape of the worm shaft 2. The first through channel 5 also passes through the extension 4. The worm shaft 2 is fitted into the first through channel 5 for one concentric alignment and positioning. The first through channel 5 has a first chamfer 6 at the end near the extension 4.

[0021] The fixed sleeve 3 has a second through channel 7 that matches the shape of the worm shaft 2. The top edge of the fixed sleeve 3 has a second chamfer 6 that matches the shape of the first chamfer 8. The worm shaft 2 is fitted into the second through channel 7, and the first chamfer 6 and the second chamfer 8 abut against each other and are aligned and positioned concentrically for a second time. This ensures that the worm shaft and the worm gear sleeve are precisely fitted and installed, improving the smoothness of equipment operation and enhancing production quality.

[0022] The fixed sleeve 3 has a mounting hole 9 on its side end. A fastener can be installed in the mounting hole 9 to fix the worm shaft 2 and the fixed sleeve 3.

[0023] The fixed sleeve 3 is also provided with a ring stop 10, and an annular groove is formed between the ring stop 10 and the fixed sleeve 3. The annular groove is adapted to the shape of the extension 4. The annular groove and the extension 4 are sleeved together, which further improves the concentric alignment effect of the worm gear sleeve 1 and the worm shaft 2.

[0024] In this embodiment, a baffle 11 is provided on the worm shaft 2, and the end of the worm gear sleeve 1 away from the extension is in contact with the baffle 11. The worm gear sleeve 1 is pressed against the baffle 1 by a fixed sleeve 3, so that the worm gear sleeve 1 and the baffle 11 are pressed and fixed, thus achieving the effect of fixed connection between the worm gear sleeve 1 and the worm shaft 2.

[0025] The baffle 11 has two symmetrically arranged U-shaped notches 12. The end of the worm gear sleeve 1 that abuts against the baffle 11 has two mounting holes 13, and the two mounting holes 13 correspond to the two U-shaped notches 12. The mounting holes 13 can be inserted into the mounting pins, and the pins can press against the baffle 11, which further improves the fixed connection effect between the worm gear sleeve 1 and the worm shaft 2.

[0026] The above structure facilitates the disassembly or installation of the worm gear sleeve 1 and the worm shaft 2, reducing the difficulty of operation for operators.

[0027] The axis of the fixed sleeve 3 forms an angle with the first chamfer 6, and the angle range is 30° to 60°; in this embodiment, the angle is 45°.

[0028] In other embodiments, the worm shaft 2 is not provided with a baffle 11, and both ends of the worm gear sleeve 1 are provided with extensions 4. The worm shaft 2 and the worm gear sleeve 1 are installed by two fixed sleeves 3.

[0029] In other embodiments, the worm shaft 2 is not provided with a baffle 11, and both ends of the worm gear sleeve 1 are provided with extensions 4. A fixed sleeve 3 that is integrally connected with the worm shaft 2 is fixedly provided on the worm gear sleeve 1. This structure can add a movable fixed sleeve 3 for matching and installation.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A combined worm, comprising a worm gear sleeve, a worm shaft and a fixed sleeve connector which are fitted and installed, characterized in that: an extension is arranged at one end of the worm gear sleeve, a first through channel which is matched with the shape of the worm shaft is arranged on the worm gear sleeve, and the first through channel simultaneously penetrates the extension, the worm shaft is sleeved into the first through channel, and a first reverse bevel is arranged at the opening of the end of the first through channel close to the extension; a second through channel which is matched with the shape of the worm shaft is arranged on the fixed sleeve connector, a second reverse bevel which is matched with the shape of the first reverse bevel is arranged at the top edge of the fixed sleeve connector, the worm shaft is sleeved into the second through channel, and the first reverse bevel and the second reverse bevel are matched with each other; an installation hole one is arranged at the side end of the fixed sleeve connector.

2. A combined worm according to claim 1, characterized in that: a ring stopper is further arranged on the fixed sleeve connector, a ring groove is formed between the ring stopper and the fixed sleeve connector, the shape of the ring groove is matched with that of the extension, and the ring groove is sleeved with the extension.

3. A combined worm according to claim 1, characterized in that: a baffle is arranged on the worm shaft, and the end of the worm gear sleeve away from the extension is matched with the baffle.

4. A combined worm according to claim 3, characterized in that: two symmetrically arranged U-shaped notches are arranged on the baffle, two installation holes two are arranged at the end of the worm gear sleeve which is matched with the baffle, and the two installation holes two correspond to the positions of the two U-shaped notches.

5. A combined worm according to claim 1, characterized in that: an included angle is formed between the axis of the fixed sleeve connector and the first reverse bevel, and the angle of the included angle ranges from 30° to 60°.

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