Compact direct-connection ring surface enveloping speed reducer

Abstract

The utility model provides a compact direct-connection ring enveloping speed reducer which comprises a fixing box, a cavity of the fixing box is at least communicated with two through grooves, the two through grooves comprise the first through groove and the second through groove, a ring enveloping worm is arranged in the first through groove, a bevel gear is arranged in the second through groove, and the ring enveloping worm is meshed with the bevel gear. A first notch is formed in one side of the first through groove and connected with an input assembly, one end of the input assembly is used for being connected with a motor, the other end of the input assembly is directly and axially connected with the annular enveloping worm, a spiral tooth of the annular enveloping worm is of a first arc-shaped structure with the middle low and the two sides high, and the two sides of the spiral tooth are provided with second arc-shaped structures which are reduced. Third arc structures are arranged on the two sides of the bevel gear. Through the design of the multi-arc-shaped annular enveloping worm and the bevel gear, the meshing precision between the annular enveloping worm and the bevel gear is ensured, the more compact structure of the speed reducer is ensured, and meanwhile interference of parts in the compact structure can be further avoided through the arc-shaped design.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a compact direct-connected annular surface enveloping reducer. Background Art

[0002] The transmission mechanism refers to a device or system that transfers power from one component to another. It plays a key role in various mechanical equipment and industrial applications. Worm drive is a commonly used transmission method, which uses the meshing of the worm and the worm wheel to transmit power and motion. Worm drive has the characteristics of large transmission ratio, compact structure and smooth operation.

[0003] In the prior art, the joint transmission components of small and medium-sized robots are usually required to have a compact structure. However, how to avoid interference between parts in a small space in a compact structure is a major problem that needs to be solved in the prior art. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned technology, the utility model provides a compact direct-connected annular envelope reducer, including a fixed box, a cavity is arranged in the fixed box, and the cavity is connected to at least two through grooves, the two through grooves penetrate four adjacent surfaces of the fixed box in a circumferential direction, the two through grooves include a first through groove and a second through groove, an annular envelope worm is arranged in the first through groove, the left and right sides of the outer diameter of the annular envelope worm are fixedly connected with a first bearing, a helical gear is arranged in the second through groove, the left and right sides of the outer diameter of the helical gear are fixedly connected with a second bearing, the annular envelope worm is meshed with the helical gear; a first notch is arranged on one side of the first through groove, the first notch is connected to an input component, one end of the input component is used to connect to a motor, and the other end is directly axially connected to the annular envelope worm, the helical teeth of the annular envelope worm have a first arc structure with a low middle and high sides, the two sides of the helical teeth have a reduced second arc structure, and the two sides of the helical gear have a third arc structure.

[0005] In one embodiment, the first arc structure matches the outer arc structure of the helical gear, so that the meshing depth of at least the middle portion of the helical teeth and the helical gear is the same.

[0006] In one embodiment, the third arc structures on both sides of the bevel gear are connected at the top position through a plane.

[0007] In one embodiment, the first bearings are provided in at least two groups.

[0008] In one embodiment, the fixing box is located at the outer sides of both side walls of the second through groove and is connected to fixing plates, the two sides of the bevel gear pass through the fixing plates respectively, and at least one side is connected to an output shaft disc, and the output shaft disc is provided with a plurality of connecting holes along its circumference.

[0009] In one embodiment, the output shaft disc is a non-closed annular disc structure, and a screw fastening structure is provided on the side wall of the output shaft disc. The screw fastening structure can change the diameter of the central circular hole of the annular disc structure.

[0010] In one embodiment, the plurality of side walls of the fixing box are each provided with a plurality of preset blind holes for connection.

[0011] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model provides a compact direct-connected annular envelope reducer, comprising a fixed box, a cavity is arranged in the fixed box, and the cavity is connected to at least two through grooves, the two through grooves penetrate four adjacent surfaces of the fixed box in a circumferential direction, the two through grooves include a first through groove and a second through groove, an annular envelope worm is arranged in the first through groove, the left and right sides of the outer diameter of the annular envelope worm are fixedly connected to the first bearing, the second through groove is arranged in the second through groove, the left and right sides of the outer diameter of the helical gear are fixedly connected to the second bearing, the annular envelope worm is meshed with the helical gear A first notch is provided on one side of the first through groove, and an input assembly is connected to the first notch. One end of the input assembly is used to connect the motor, and the other end is directly connected to the axial direction of the annular envelope worm. The helical teeth of the annular envelope worm have a first arc structure with a low middle and high sides, and the two sides of the helical teeth have a reduced second arc structure, and the two sides of the helical gear have a third arc structure; the multi-arc design of the annular envelope worm and the helical gear design ensures the meshing accuracy between the annular envelope worm and the helical gear, ensures a more compact structure of the reducer, and the arc design can further avoid interference between parts in the compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model.

[0013] Figure 2 This is the internal structure diagram of the utility model.

[0014] Figure 3 It is an internal sectional view of the present utility model. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0017] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0018] In the application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the utility model. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, known structures and processes are not described in detail to avoid obscuring the description of the utility model with unnecessary details. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles disclosed in this application.

[0019] See also Figure 1-3The utility model discloses a compact direct-connected annular envelope reducer, comprising a fixed box 1, a cavity is arranged in the fixed box 1, and the cavity is connected with at least two through grooves, the two through grooves penetrate four adjacent faces of the fixed box 1 in a circumferential direction, the two through grooves include a first through groove and a second through groove, an annular envelope worm 7 is arranged in the first through groove, the left and right sides of the outer diameter of the annular envelope worm 7 are fixedly connected with a first bearing 8, a helical gear 10 is arranged in the second through groove, the left and right sides of the outer diameter of the helical gear 10 are fixedly connected with a second bearing 9, the annular envelope worm 7 is meshed with the helical gear 10; a first notch is arranged on one side of the first through groove, the first notch is connected with an input component 2, one end of the input component 2 is used to connect the motor, and the other end It is directly connected axially with the annular envelope worm 7, and the helical teeth of the annular envelope worm 7 have a first arc structure 12 that is low in the middle and high on both sides, and there are reduced second arc structures on both sides of the helical teeth, and there are third arc structures 11 on both sides of the bevel gear 10; the design of the first arc structure 12 can firstly realize the accurate meshing of the helical teeth of the annular envelope worm 7 with the bevel gear 10 in a limited compact space, and further, the structure of low in the middle and high on both sides can make the helical teeth be arranged to fit the arc surface of the bevel gear 10, which ensures the stability and accuracy of the meshing and avoids the waste of space caused by designing too many spiral teeth; further, the second arc structure 13 and the third arc structure 11 can form an avoidance for parts to effectively avoid interference.

[0020] In one embodiment, the first arc structure 12 matches the outer arc structure of the helical gear 10, so that the meshing depth of at least the middle part of the spiral teeth is the same as that of the helical gear 10; this can further improve the close meshing degree between the helical gear 10 and the annular envelope worm 7, achieving stable and precise meshing while avoiding space waste.

[0021] In one embodiment, the third arc structures 11 on both sides of the helical gear 10 are connected at the top position by a plane; a partial plane connection design can make the meshing between the helical gear 10 and the helical teeth of the annular surface enveloping worm 7 more stable.

[0022] In one embodiment, at least two groups of first bearings 8 are provided; the provision of two groups of bearings can further reduce the friction when the gear shaft of the annular surface enveloping the worm 7 and the bevel gear 10 rotates, thereby achieving a better supporting effect and ensuring the stability of the entire reducer when large torque is output.

[0023] In one embodiment, the fixing box 1 is connected to a fixing plate 3 on the outer sides of both side walls where the second through groove is located, the bevel gear 10 passes through the fixing plates 3 on both sides respectively, and at least one side is connected to an output shaft disc 4, and the output shaft disc 4 is provided with a plurality of connecting holes 6 along its circumference; the output shaft disc 4 is used to connect an output object.

[0024] In one embodiment, the output shaft disc 4 is a non-closed annular disc structure, and the side wall of the output shaft disc 4 is provided with a screw fastening structure, which can change the diameter of the central circular hole 5 of the annular disc structure; in this way, the output shaft disc 4 can adaptively clamp shafts of different diameters.

[0025] In one embodiment, multiple side walls of the fixing box 1 are each provided with multiple preset blind holes 14 for connection.

[0026] The advantages of the utility model are:

[0027] The multi-arc design of the annular envelope worm and the helical gear ensures the meshing accuracy between the annular envelope worm and the helical gear, ensuring a more compact structure of the reducer. At the same time, the arc design further avoids interference between parts within the compact structure.

[0028] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A compact direct-connected annular surface enveloping reducer, characterized in that: It comprises a fixing box, wherein a cavity is arranged in the fixing box, and the cavity is connected to at least two through grooves, the two through grooves penetrate four adjacent surfaces of the fixing box in a circumferential direction, the two through grooves comprise a first through groove and a second through groove, an annular envelope worm is arranged in the first through groove, and first bearings are fixedly connected to the left and right sides of the outer diameter of the annular envelope worm, a helical gear is arranged in the second through groove, and second bearings are fixedly connected to the left and right sides of the outer diameter of the helical gear, and the annular envelope worm is meshed with the helical gear; a first notch is arranged on one side of the first through groove, and an input assembly is connected to the first notch, one end of the input assembly is used to connect to a motor, and the other end is directly axially connected to the annular envelope worm, the helical teeth of the annular envelope worm have a first arc structure with a low center and high sides, a second arc structure with a reduction on both sides of the helical teeth, and a third arc structure on both sides of the helical gear.

2. A compact direct-connected annular surface enveloping reducer according to claim 1, characterized in that: The first arc structure matches the outer arc structure of the helical gear, so that the meshing depth of at least the middle portion of the helical teeth and the helical gear is the same.

3. A compact direct-connected annular surface enveloping reducer according to claim 2, characterized in that: The third arc structures on both sides of the bevel gear are connected at the top position through a plane.

4. A compact direct-connected annular surface enveloping reducer according to claim 1, characterized in that: The first bearings are provided in at least two groups.

5. The compact direct-connected annular surface enveloping reducer according to claim 1, characterized in that: The fixing box is located at the second through slot where the two side walls are connected to fixing plates, the two sides of the bevel gear pass through the fixing plates respectively, and at least one side is connected to an output shaft disc, and the output shaft disc is provided with a plurality of connection holes along its circumference.

6. A compact direct-connected annular surface enveloping reducer according to claim 5, characterized in that: The output shaft disc is a non-closed annular disc structure. The side wall of the output shaft disc is provided with a screw fastening structure. The screw fastening structure can change the diameter of the central circular hole of the annular disc structure.

7. A compact direct-connected annular surface enveloping reducer according to claim 1, characterized in that: The multiple side walls of the fixing box are each provided with a multiple number of preset blind holes for connection.

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