Single-input and coaxial double-output conical worm reducer

Abstract

The present application relates to the field of gear transmission, in particular to a single-input and coaxial double-output cone worm reducer, comprising a reducer box, a double-cone worm input shaft, a first cone worm wheel, a second cone worm wheel, a first output shaft and a second output shaft, the reducer box is composed of a box bottom and a box cover; two sections of cone worm gears are arranged on the input shaft, and the two sections of cone worm gears are respectively engaged with the first cone worm wheel and the second cone worm wheel; the diameters of the first cone worm wheel and the second cone worm wheel are different, but the axes of the two are located on the same straight line, the two are limited from moving axially relative to each other by the ball, but can rotate relative to each other. The present application simultaneously drives two cone worm wheels by a single double-cone worm input shaft, realizes the function of single input and double output, and through the setting of the rotation direction and basic design parameters of the first and second cone worm pairs, the same direction or reverse output of the double output shafts can be realized, and the constant speed or differential speed output can also be realized, the transmission synchronization is good, the structure is compact, the transmission efficiency is high, and the present application is suitable for special occasions of double output.

Description

Technical Field

[0001] This invention relates to the field of gear transmission, and in particular to a worm gear reducer, specifically a single-input and coaxial double-output conical worm gear reducer. Background Technology

[0002] Worm gear reducers are a common type of speed reduction device, characterized by their large transmission ratio, compact structure, smooth operation, and good self-locking properties. They are widely used in various industrial equipment. In certain special applications, such as the traveling mechanisms of heavy equipment or devices requiring synchronous reverse motion, it is necessary to provide power output to both shafts simultaneously. Traditional worm gear reducers are typically single-input single-output or dual-input single-output types, as shown in the following structures:

[0003] Chinese patent “Dual Degree of Freedom Robotic Arm with Adjustable Side Backlash Based on Conical Worm Gear Drive”, publication number “CN115126838 B”, uses two drive sources to drive two conical worm gears, which in turn drive two conical worm wheels to rotate. The invention achieves the function of dual input drive dual output, but cannot achieve the characteristic of single input dual output.

[0004] Chinese patent “Dual-input multi-stage variable speed worm gear reducer”, publication number “CN 106286748 A”, adopts dual worm gear input, with a first driver and a second driver driving the first worm and the second worm respectively, and finally achieves multi-stage variable speed output through bevel gear differential gear train. Although this invention can effectively achieve dual output, it requires two drive sources to drive two worms, and cannot achieve the single-input dual-output characteristic.

[0005] Chinese patent "A Dual-Motor Reducer", publication number "CN 113525055 B", describes an invention in which a first motor and a second motor simultaneously drive a worm gear to rotate, which in turn drives a worm wheel to rotate, completing the first stage of speed reduction. The worm wheel then drives a set of bevel gears to rotate via a spline, completing the second stage of speed reduction. This invention uses two motors to drive a single worm gear, which can increase torque, but there is only one output shaft, making it impossible to achieve dual output.

[0006] To address the aforementioned problems, this invention provides a single-input, coaxial dual-output conical worm gear reducer. This invention achieves single-axis input and dual-axis output by engaging two coaxially arranged conical worm gears with a worm having two segments of conical worm teeth, thereby improving transmission efficiency and stability. Furthermore, by setting the rotation direction and parameters of the first and second conical worm pairs, it is possible to achieve the same or different output directions for the first and second output shafts, as well as equal or unequal output speeds. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-input and coaxial dual-output conical worm gear reducer with a compact structure, high transmission efficiency, and flexible design of output parameters.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: a single-input and coaxial dual-output conical worm gear reducer, comprising a reducer housing bottom, a reducer housing cover, a dual-conical worm input shaft, a first conical worm wheel, a second conical worm wheel, a first output shaft, and a second output shaft;

[0009] The reducer housing bottom and the reducer housing cover together form the reducer housing body, and the two are fixedly connected by bolts; the first conical worm gear, the second conical worm gear and the double conical worm input shaft are all located in the receiving space enclosed by the reducer housing bottom and the reducer housing cover. The front and rear end faces of the reducer housing bottom have two concentric through holes. The first bearing seat and the second bearing seat are concentrically extended outward on the outside of the through holes. The left and right end faces of the reducer housing bottom have two through holes. The third bearing seat and the fourth bearing seat are extended outward on the outside of the through holes, and are also concentrically arranged with the through holes.

[0010] The first conical worm wheel is a conical worm wheel with a smaller diameter and a shaft hole in the center. A keyway is provided on the inner wall of the shaft hole. The first output shaft is connected to the first conical worm wheel by a key. The second conical worm wheel is a worm wheel with a larger diameter and a shaft hole in the center. A keyway is provided on the inner wall of the shaft hole. The second output shaft is also connected to the second conical worm wheel by a key.

[0011] The front end of the first output shaft passes through a first tapered roller bearing, which is fixed inside the first bearing housing to restrict the radial movement of the shaft. The outer end face of the first bearing housing is provided with a first bearing cover, and the two are connected by screws. The front end of the second output shaft passes through a second bearing housing, which is provided inside the second bearing housing to restrict the radial movement of the shaft. The outer end face of the second bearing housing is provided with a second bearing cover, and the two are connected by screws.

[0012] The left end of the double-cone worm gear input shaft is supported in the third bearing housing by the third tapered roller bearing and is closed by the third bearing cover; its right end is supported in the fourth bearing housing by the fourth tapered roller bearing and is connected to the fourth bearing cover by screws. This shaft is used to connect to the power source.

[0013] Furthermore, the first and second conical worm gears are arranged coaxially. A first ball bearing support groove is provided on the bottom surface of the first conical worm gear (near the contact surface of the second conical worm gear), and a second ball bearing support groove is provided on the top surface of the second conical worm gear (near the contact surface of the first conical worm gear). The balls are fixed in the first and second ball bearing support grooves. The first and second conical worm gears are restricted from axial relative movement by the balls, but they can rotate relative to each other.

[0014] Furthermore, the double-cone worm input shaft is provided with two sections of conical worm teeth, which mesh simultaneously with the first conical worm wheel and the second conical worm wheel, respectively, to form a first conical worm pair and a second conical worm pair.

[0015] Furthermore, when the first and second conical worm gear pairs have the same direction of rotation, the two conical worm teeth on the double conical worm input shaft are located in the same quadrant, and the first and second output shafts achieve output in the same direction. When the first and second conical worm gear pairs have opposite directions of rotation, the two conical worm teeth on the double conical worm input shaft are located in different quadrants, and the first and second output shafts achieve output in opposite directions.

[0016] Furthermore, by setting the basic design parameters of the first and second conical worm gear pairs, when the transmission ratios of the first and second conical worm gear pairs are equal, the first and second output shafts output at the same speed; when the transmission ratios of the first and second conical worm gear pairs are not equal, the first and second output shafts output at different speeds.

[0017] The beneficial effects of this invention are as follows: This invention provides a single-input, coaxial dual-output conical worm gear reducer, achieving dual-shaft output within a single housing, significantly saving installation space. By changing the basic parameters of the first and second conical worm pairs, the speed and direction of the two-shaft output can be flexibly designed; that is, the first and second output shafts can rotate in the same or opposite directions, and their speeds can be equal or unequal, meeting diverse transmission needs. The two-shaft output originates from the same dual-conical worm input shaft, ensuring output synchronization and avoiding the control difficulties and synchronization errors caused by using two independent drives. Ball bearings are used to limit the axial relative movement between the two conical worm gears. The first output shaft, second output shaft, and dual-conical worm input shaft are all supported by tapered roller bearings, ensuring overall support rigidity, preventing axial deformation of the shafts, and ensuring structural stability and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the meshing relationship between the double-cone worm input shaft and the two cone worm wheels in this invention;

[0019] Figure 2 This is a left view (sectional view) of a single-input and coaxial dual-output conical worm gear reducer according to the present invention.

[0020] Figure 3 for Figure 2 Enlarged diagram of point A in the diagram.

[0021] In the diagram: 1. Gearbox bottom; 2. Gearbox cover; 3. Double tapered worm input shaft; 4. First tapered worm gear; 5. Second tapered worm gear; 6. First output shaft; 7. Second output shaft; 8. First ball bearing support groove; 9. Second ball bearing support groove; 10. First tapered roller bearing; 11. First bearing cover; 12. First bearing housing; 13. Ball; 14. Second tapered roller bearing; 15. Second bearing cover; 16. Second bearing housing; 17. Third tapered roller bearing; 18. Third bearing cover; 19. Third bearing housing; 20. Fourth tapered roller bearing; 21. Fourth bearing cover; 22. Fourth bearing housing. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0023] like Figure 1 , Figure 2 As shown, a single-input and coaxial dual-output conical worm gear reducer includes a reducer housing bottom 1, a reducer housing cover 2, a dual-conical worm input shaft 3, a first conical worm wheel 4, a second conical worm wheel 5, a first output shaft 6, and a second output shaft 7.

[0024] The reducer housing consists of a reducer housing bottom 1 and a reducer housing cover 2, which are fixedly connected by hexagonal bolts. The first conical worm gear 4, the second conical worm gear 5, and the double conical worm input shaft 3 are all located within the accommodating space enclosed by the reducer housing bottom 1 and the reducer housing cover 2. The front and rear end faces of the reducer housing bottom 1 have two through holes, and concentrically extending outward first bearing seat 12 and second bearing seat 16 are provided outside the through holes. The left and right end faces of the reducer housing bottom 1 have two through holes, and concentrically extending outward third bearing seat 19 and fourth bearing seat 22 are provided outside the through holes.

[0025] The first conical worm gear 4 is a worm gear with a smaller diameter and a central shaft hole. A keyway is provided on the inner wall of the shaft hole. The first output shaft 6 is connected to the first conical worm gear 4 by a key. The second conical worm gear 5 is a worm gear with a larger diameter and a central shaft hole. A keyway is provided on the inner wall of the shaft hole. The second output shaft 7 is connected to the second conical worm gear 5 by a key.

[0026] like Figure 2As shown, the front end of the first output shaft 6 passes through the through hole on the front face of the reducer housing bottom 1. A first tapered roller bearing 10 is provided inside the first bearing housing 12 to limit the radial movement of the shaft. The outer end face of the first bearing housing 12 is connected to the outer wall of the reducer housing bottom 1 by screws through the first bearing cover 11. The front end of the second output shaft 7 passes through the through hole on the rear end face of the reducer housing bottom 1. A second tapered roller bearing 14 is provided inside the second bearing housing 16 to limit the radial movement of the shaft. A second bearing cover 15 is provided on the outer end face of the second bearing housing 16. The two are connected by screws.

[0027] like Figure 1 , Figure 3 The first conical worm gear 4 and the second conical worm gear 5 are arranged coaxially. A first ball bearing support groove 8 is provided on the bottom surface of the first conical worm gear 4 (near the contact surface of the second conical worm gear 5), and a second ball bearing support groove 9 is provided on the top surface of the second conical worm gear 5 (near the contact surface of the first conical worm gear 4). The first conical worm gear 4 and the second conical worm gear 5 are restricted from axial relative movement by ball bearings 13, but they can rotate relative to each other. The ball bearings 13 are fixed in the first ball bearing support groove 8 and the second ball bearing support groove 9.

[0028] The double-cone worm input shaft has two sections of conical worm teeth, which mesh simultaneously with the first and second conical worm wheels to form a first and second conical worm pair. The left end of the double-cone worm input shaft 3 is supported in the third bearing housing 19 by the third tapered roller bearing 17 and sealed by the third bearing cover 18. Its right end is supported in the fourth bearing housing 22 by the fourth tapered roller bearing 20 and connected to the fourth bearing cover 21 by screws. This end is used to connect to the power source.

[0029] When the first and second conical worm gear pairs have the same direction of rotation, the two conical worm teeth on the double conical worm input shaft 3 are located in the same quadrant, and the first output shaft 6 and the second output shaft 7 achieve output in the same direction. When the first and second conical worm gear pairs have opposite directions of rotation, the two conical worm teeth on the double conical worm input shaft 3 are located in different quadrants, and the first output shaft 6 and the second output shaft 7 achieve output in opposite directions. By setting the basic design parameters of the first and second conical worm gear pairs, the first output shaft 6 and the second output shaft 7 can output at the same speed or at a different speed.

[0030] In practical applications, the power source drives the double bevel worm input shaft 3 to rotate, and the two bevel worm teeth drive the first bevel worm wheel 4 and the second bevel worm wheel 5 respectively. Since the rotation direction is opposite, the first output shaft 6 and the second output shaft 7 can achieve reverse output, or achieve same-direction output by adjusting the parameters. It is suitable for mechanical equipment that requires bidirectional or variable speed drive.

Claims

1. A single-input and coaxial dual-output conical worm gear reducer, characterized in that: Includes the reducer housing bottom (1), reducer housing cover (2), double bevel worm input shaft (3), first bevel worm wheel (4), second bevel worm wheel (5), first output shaft (6), and second output shaft (7); The reducer housing bottom (1) and the reducer housing cover (2) form the reducer housing body, which are fixedly connected by bolts; the first conical worm gear (4), the second conical worm gear (5) and the double conical worm input shaft (3) are located in the accommodating space enclosed by the reducer housing bottom (1) and the reducer housing cover (2). The front and rear end faces of the reducer housing bottom (1) have two concentrically arranged through holes, and the outer side of the through holes is provided with a first bearing seat (12) and a second bearing seat (16) extending outwards concentrically; the left and right end faces of the reducer housing bottom (1) also have two through holes, and the outer side of the through holes is provided with a third bearing seat (19) and a fourth bearing seat (22) extending outwards, which are also concentrically arranged; The first conical worm wheel (4) and the second conical worm wheel (5) are worm wheels with relatively small and large diameters, respectively. Both of them have a shaft hole in the center and a keyway in the inner wall of the shaft hole. The first conical worm wheel (4) is connected to the first output shaft (6) by a key, and the second conical worm wheel (5) is also connected to the second output shaft (7) by a key. The front end of the first output shaft (6) passes through a first tapered roller bearing (10), which is fixed inside the first bearing housing (12) to restrict the radial movement of the shaft. The outer end face of the first bearing housing (12) is provided with a first bearing cover (11), and the two are connected by screws. The front end of the second output shaft (7) passes through a second tapered roller bearing (14), which is fixed inside the second bearing housing (16) to restrict the radial movement of the shaft. The outer end face of the second bearing housing (16) is provided with a second bearing cover (15), and the two are connected by screws. The left end of the double tapered worm input shaft (3) is supported in the third bearing housing (19) by the third tapered roller bearing (17) and closed by the third bearing cover (18); its right end is supported in the fourth bearing housing (22) by the fourth tapered roller bearing (20), and the outer end face of the fourth bearing housing (22) is provided with the fourth bearing cover (21). The two are connected by screws. This shaft is used to connect to an external power source. The first conical worm wheel (4) and the second conical worm wheel (5) are arranged on the same axis. The bottom surface of the first conical worm wheel (4) is provided with a first ball support groove (8), and the top surface of the second conical worm wheel (5) is provided with a second ball support groove (9). The balls (13) are placed in the first ball support groove (8) and the second ball support groove (9). The first conical worm wheel (4) and the second conical worm wheel (5) are restricted from axial relative movement by the balls (13), but they can rotate relative to each other.

2. The single-input and coaxial dual-output conical worm gear reducer according to claim 1, characterized in that: The double-cone worm input shaft (3) is provided with two sections of conical worm teeth, which mesh with the first conical worm wheel (4) and the second conical worm wheel (5) at the same time to form the first conical worm pair and the second conical worm pair.

3. A single-input and coaxial dual-output conical worm gear reducer according to claim 1 or 2, characterized in that: When the first and second conical worm gear pairs have the same direction of rotation, the two conical worm teeth on the double conical worm input shaft (3) are located in the same quadrant, and the first output shaft (6) and the second output shaft (7) achieve output in the same direction; when the first and second conical worm gear pairs have opposite directions of rotation, the two conical worm teeth on the double conical worm input shaft (3) are located in different quadrants, and the first output shaft (6) and the second output shaft (7) achieve output in opposite directions.

4. A single-input and coaxial dual-output conical worm gear reducer according to claim 1 or 2, characterized in that: When the transmission ratios of the first and second conical worm gear pairs are equal, the first output shaft (6) and the second output shaft (7) output at the same speed; when the transmission ratios of the first and second conical worm gear pairs are not equal, the first output shaft (6) and the second output shaft (7) output at a differential speed.

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