Speed reducer with multi-bearing stable structure

Abstract

The utility model provides a speed reducer with a multi-bearing stabilizing structure, which is characterized in that a cavity is arranged in a fixed box, the cavity is at least communicated with two through grooves, the two through grooves comprise a first through groove and a second through groove, an annular enveloping worm is arranged in the first through groove, the left side and the right side of the outer diameter of the annular enveloping worm are fixedly connected with first bearing packs, and the second bearing packs are fixedly connected with second bearing packs. A bevel gear is arranged in the second through groove, second bearing sets are fixedly connected to the left side and the right side of the outer diameter of the bevel gear, and the annular enveloping worm is meshed with the bevel gear. A first notch of the first through groove is connected with an input assembly, one end of the input assembly is used for being connected with a motor, and the other end of the input assembly is in meshed connection with the annular enveloping worm. The side, close to the input assembly, of the annular enveloping worm comprises a first extension shaft, the first bearing set is located on the first extension shaft and provided with a plurality of first bearings, and the first extension shaft is completely covered with the first bearings. By arranging the multi-bearing stabilizing structure and reasonably arranging the bearing space, the transmission stability in the compact speed reducer structure is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a reducer with a multi-bearing stable structure. 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 usually need to have a compact structure. In order to save space in a compact structure, the use of parts is usually reduced as much as possible. However, the reduction in parts brings about the loss of structural stability. How to achieve a compact structure while ensuring the structural stability of the reducer is an urgent problem to be solved. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned technology, the utility model provides a reducer with a multi-bearing stable structure, including a fixed box, a cavity is provided in the fixed box, and the cavity is connected to at least two through grooves, the two through grooves penetrate three 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 provided 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 group, a helical gear is provided 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 group, the annular envelope worm is meshed with the helical gear; a first notch is provided on one side of the first through groove, the first notch is connected to an input assembly, one end of the input assembly is used to connect to a motor, and the other end is meshed and connected with the annular envelope worm through a first gear group; the annular envelope worm includes a first extension shaft on one side close to the input assembly, the first bearing group is located on the first extension shaft and is provided with a plurality of first bearings, and the plurality of first bearings completely cover the first extension shaft.

[0005] In one embodiment, a second extension shaft is provided on the side of the annular surface enveloping worm away from the extension shaft, the axial length of the second extension shaft is smaller than that of the first extension shaft, at least one first bearing is sleeved on the second extension shaft, and the first bearing is fixedly connected to the fixed box.

[0006] In one embodiment, the bevel gear is located on the central axis of the fixed box, the second bearing seat groups are symmetrically arranged on both axial sides of the bevel gear, and the second bearing groups on both sides include at least two second bearings.

[0007] In one embodiment, a diameter of the first bearing is equal to a maximum diameter of the first through-groove, and a diameter of the second bearing is equal to a maximum diameter of the second through-groove.

[0008] In one embodiment, a plurality of the first bearings and a plurality of the second bearings fill other spaces in the first through groove and the second through groove in the fixing box except for the meshing position between the annular envelope worm and the bevel gear.

[0009] In one embodiment, a motor mounting seat is connected to a side wall of the fixing box located at the first notch, the motor mounting seat completely covers the input assembly, and a motor connection hole is provided at one end away from the fixing box.

[0010] In one embodiment, the first slot includes a motor input port, the input sleeve of the input assembly is provided with a third bearing group, the third bearing group includes at least two third bearings, at least one of the two third bearings is located in the motor mounting seat, and the other is located in the motor input port.

[0011] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model provides a reducer with a multi-bearing stable structure, 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 three 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 group, 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 to the second bearing group Two bearing groups, an annular envelope worm is meshed with the helical gear; a first notch is provided on one side of the first through groove, and the first notch is connected to an input component, one end of the input component is used to connect the motor, and the other end is meshed and connected with the annular envelope worm through the first gear group; the side of the annular envelope worm close to the input component includes a first extension shaft, and the first bearing group is located on the first extension shaft and is provided with a plurality of first bearings, and the plurality of first bearings completely cover the first extension shaft; by setting a multi-bearing stable structure and reasonably setting the bearing space, the transmission stability in the compact reducer structure is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0013] Figure 2 It is a three-dimensional 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 is a reducer with a multi-bearing stable structure, including a fixed box 9, a cavity is arranged in the fixed box 9, and the cavity is connected to at least two through grooves, the two through grooves penetrate three adjacent surfaces of the fixed box 9 in a circumferential direction, the two through grooves include a first through groove 91 and a second through groove 92, a ring-shaped envelope worm 5 is arranged in the first through groove 91, and the first bearing group 4 is fixedly connected to the left and right sides of the outer diameter of the ring-shaped envelope worm 5, a helical gear 7 is arranged in the second through groove 92, and the second bearing group 6 is fixedly connected to the left and right sides of the outer diameter of the helical gear 7, and the ring-shaped envelope worm 5 is meshed with the helical gear 7; a first notch is arranged on one side of the first through groove 91, and an input component 1 is connected to the first notch, one end of the input component 1 is used to connect the motor, and the other end is meshed and connected with the ring-shaped envelope worm 5 through the first gear group 2; the ring The side of the enveloping worm 5 close to the input component 1 includes a first extension shaft 51, and the first bearing group 4 is located on the first extension shaft 51 and has multiple first bearings 41, and the multiple first bearings 41 completely cover the first extension shaft 51; the existing worm gear has weak compressive resistance, low bearing capacity, and greater processing difficulty due to materials and designs. The present application changes the worm gear into an arc-shaped bevel gear 7 made of stainless steel. The arc-shaped design can increase the number of teeth while avoiding interference of parts in a compact environment. Such innovation solves the problem of too small bearing capacity, thereby being able to withstand a larger torque output; further, the arc-shaped worm is connected to a second gear at the position of the first slot, and the outer diameter of the first gear is smaller than the outer diameter of the second gear. The torque output by the motor is further increased by driving the large gear to rotate with the small gear, thereby achieving a large torque output.

[0020] Among them, the meshing position of the annular surface enveloping the worm 5 is extended to the position of the bevel gear 7 through the long first extension shaft 51 and meshed with the bevel gear 7 to realize transmission. In order to overcome the instability of the long first extension shaft 51, multiple first bearings 41 completely cover the first extension shaft 51 to avoid vibration and jitter during transmission, thereby enhancing stability.

[0021] In one embodiment, a second extension shaft 52 is provided on the side of the annular envelope worm 5 away from the extension shaft, the axial length of the second extension shaft 52 is smaller than the first extension shaft 51, and at least one first bearing 41 is sleeved on the second extension shaft 52, and the first bearing 41 is fixedly connected to the fixed box 9; the second extension shaft 52 is used to establish a rotatable fixed connection with the inner cavity of the fixed box 9, which is achieved through the first bearing 41, so that both sides of the annular envelope worm 5 are wrapped by the first bearing 41 to ensure stability.

[0022] In one embodiment, the bevel gear 7 is located on the central axis of the fixed box 9, the second bearing group 6 is symmetrically arranged on both sides of the axial direction of the bevel gear 7, and the second bearing group 6 on both sides includes at least two second bearings 61; the second bearing 61 is provided in plurality and is located on both sides of the bevel gear 7, thereby increasing the stability of the bevel gear 7 during rotation.

[0023] In one embodiment, the diameter of the first bearing 41 is equal to the maximum diameter of the first through groove 91, and the diameter of the second bearing 61 is equal to the maximum diameter of the second through groove 92; the diameters of the first bearing 41 and the second bearing 61 are set so that their outer sides can abut against the through grooves, thereby ensuring stability after connection.

[0024] Furthermore, multiple first bearings 41 and multiple second bearings 61 fill other spaces in the first through groove 91 and the second through groove 92 in the fixed box 9 except the meshing position of the annular envelope worm 5 and the bevel gear 7; the present application utilizes the arrangement of the first bearing 41 and the second bearing 61 to fill other spaces in the first through groove 91 and the second through groove 92 in the fixed box 9 except the meshing position of the annular envelope worm 5 and the bevel gear 7, while reasonably utilizing the internal space, maximally improving the stability of the meshing of the annular envelope worm 5 and the bevel gear 7, and at the same time does not affect the operation of the annular envelope worm 5 and the bevel gear 7.

[0025] In one embodiment, a side wall of the fixing box 9 located at the first notch is connected to a motor mounting seat 8 , the motor mounting seat 8 completely covers the input assembly 1 , and a motor connection hole is provided at one end away from the fixing box 9 .

[0026] In one embodiment, the first slot includes a motor input port, and the input sleeve of the input component 1 is provided with a third bearing group 3, the third bearing group 3 includes at least two third bearings 31, at least one of the two third bearings 31 is located in the motor mounting seat 8, and the other is located in the motor input port; the third bearings 31 are respectively arranged in the motor mounting seat 8 and the motor input port, which can ensure the stability of the input shaft of the input component 1 during rotation on both sides of the first gear group 2.

[0027] The advantages of the utility model are:

[0028] By setting up a multi-bearing stable structure and rationally arranging the bearing space, transmission stability can be achieved within a compact reducer structure.

[0029] 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 reducer with a multi-bearing stable structure, 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 three 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 bearing groups 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 bearing groups 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 meshed and connected to the annular envelope worm through a first gear group; the annular envelope worm comprises a first extension shaft on a side close to the input assembly, and the first bearing group is provided with a plurality of first bearings on the first extension shaft, and the plurality of first bearings completely cover the first extension shaft.

2. The reducer with a multi-bearing stable structure according to claim 1, characterized in that: A second extension shaft is provided on the side of the annular surface enveloping worm away from the extension shaft. The axial length of the second extension shaft is smaller than that of the first extension shaft. At least one first bearing is sleeved on the second extension shaft. The first bearing is fixedly connected to the fixing box.

3. The reducer with a multi-bearing stable structure according to claim 2, characterized in that: The bevel gear is located on the central axis of the fixed box, the second bearing seat groups are symmetrically arranged on both axial sides of the bevel gear, and the second bearing groups on both sides include at least two second bearings.

4. The reducer with a multi-bearing stable structure according to claim 3, characterized in that: The diameter of the first bearing is equal to the maximum diameter of the first through-groove, and the diameter of the second bearing is equal to the maximum diameter of the second through-groove.

5. The reducer with a multi-bearing stable structure according to claim 4, characterized in that: The plurality of first bearings and the plurality of second bearings fill other spaces in the first through groove and the second through groove in the fixing box except for the meshing position between the annular envelope worm and the helical gear.

6. The reducer with a multi-bearing stable structure according to claim 1, characterized in that: A motor mounting seat is connected to the side wall of the fixing box located at the first notch. The motor mounting seat completely covers the input component, and a motor connecting hole is provided at one end away from the fixing box.

7. The reducer with a multi-bearing stable structure according to claim 6, characterized in that: The first notch includes a motor input port, the input sleeve of the input assembly is provided with a third bearing group, the third bearing group includes at least two third bearings, at least one of the two third bearings is located in the motor mounting seat, and the other is located in the motor input port.

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