A worm gear speed reducer for a pipe bending machine

Abstract

The utility model provides a kind of worm gear speed reducer for pipe bender, including shell, the worm as input end is rotationally arranged in the shell, the worm gear shaft with worm wheel is rotationally arranged in the shell, worm gear shaft and worm are perpendicular to each other, the hollow portion of worm gear shaft is worn and is equipped with output shaft, output shaft is coaxially connected with worm gear shaft by the mode of key connection.This worm gear speed reducer for pipe bender realizes ninety degrees vertical steering of power input end and output end using intermeshing worm wheel and worm, this transmission mode not only can ingeniously adapt the space layout requirement of pipe bender operation, avoid the interference of power transmission path and processing station, but also can reduce power loss and vibration in steering process by the inherent low back gap, high transmission stability characteristics of worm gear drive.

Description

Technical Field

[0001] This utility model relates to the technical field of speed reducers, and in particular to a worm gear speed reducer for a pipe bending machine. Background Technology

[0002] A speed reducer is a mechanical transmission device that converts the high speed of a power source into the low speed and amplifies the torque through mechanical structures such as gears, worm gears, or planetary gear trains. It is widely used in industries, transportation, energy, and other fields.

[0003] A Chinese patent with authorization announcement number CN216045244U discloses a high-precision planetary reducer for a CNC pipe bending machine, including a main housing, an output shaft rotatably disposed inside the main housing, one end of the output shaft passing through one side of the main housing and extending outward, a secondary housing fixedly connected to the other side of the main housing, a docking shaft rotatably disposed inside the secondary housing, the docking shaft rotatably passing through both sides of the secondary housing, a planetary reduction assembly disposed between the docking shaft and the output shaft, the planetary reduction assembly being used to reduce the rotation of the output shaft, a side housing fixedly connected to the other side of the secondary housing, the side housing being provided with an intermittent reduction assembly.

[0004] The existing technical solutions mentioned above have the following drawbacks: Although the high-precision planetary reducer used in CNC pipe bending machines can reduce the speed of the power source and amplify the torque, the input end and the output end are in the same direction, which makes it difficult to meet the needs of pipe bending machines with steering transmission requirements. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a worm gear reducer for a pipe bending machine that addresses the above-mentioned shortcomings in the prior art, and solves the problem that the input and output ends are in the same direction in the prior art.

[0006] The above-mentioned utility model objective is achieved through the following technical solution: a worm gear reducer for a pipe bending machine, comprising a housing, a worm gear serving as an input end rotatably disposed within the housing, a worm gear shaft having a worm wheel rotatably disposed within the housing, the worm gear shaft being perpendicular to the worm gear, an output shaft passing through the hollow portion of the worm gear shaft, and the output shaft being coaxially connected to the worm gear shaft by a key connection.

[0007] The present invention is further configured such that: a plurality of upper grooves are provided inside the housing, and an upper bearing is inserted into the upper groove with interference fit, and the upper bearing is fitted onto the worm gear.

[0008] The present invention is further configured such that: a plurality of lower grooves are provided inside the housing, and a lower bearing is interference-fitted into the lower grooves, and the lower bearing is mounted on the worm gear shaft.

[0009] The present invention is further configured such that: the top of the housing is provided with an oil filling pipe located directly above the worm gear, the top of the oil filling pipe is provided with a top plate, the top plate has an installation hole at the center, the top plate has a plurality of oil filling holes evenly distributed outside the installation hole, and a capping device for sealing the oil filling holes is inserted into the installation hole.

[0010] The present invention is further configured such that: the cover device includes a housing that is inserted into and fitted with the mounting hole; a cover plate is provided on the outer side wall of the housing to close the oil filling hole; the housing has an inner chamber; a guide plate hole is provided through the outer side wall of the housing; a locking plate is slidably disposed in the guide plate hole; and a moving plate assembly is provided in the inner chamber.

[0011] The present invention is further configured such that: an opening is provided through the top surface of the housing; a plate is provided on the end face of the locking plate near the inner chamber; a pin is provided on both ends of the plate; the moving plate assembly includes a drive plate shaft, a connecting plate, and a connecting rod; the drive plate shaft is rotatably located at the center of the inner chamber and extends out of the inner chamber through the opening at its top; the connecting plate is coaxially mounted on the drive plate shaft; multiple pins are provided on both ends of the connecting plate; one end of the connecting rod is hinged to the plate connecting plate through a pin, and the other end is hinged to the connecting plate through a pin.

[0012] The present invention is further configured such that a handwheel is coaxially arranged after the drive shaft passes through the opening.

[0013] The present invention is further configured such that: an upper turntable and a lower turntable are coaxially arranged on the drive plate shaft, both of which are rotatably engaged with the inner chamber; a threaded hole is provided on the side wall of the lower turntable; a through hole aligned with the threaded hole is provided on the outer side wall of the housing; and a hand screw threaded into the through hole and connected to the threaded hole is provided.

[0014] In summary, the beneficial technical effects of this utility model are as follows: This worm gear reducer for pipe bending machines utilizes meshing worm wheels and worms to achieve a 90-degree vertical steering between the power input end and the output end. This transmission method not only cleverly adapts to the spatial layout requirements of the pipe bending machine during operation and avoids interference between the power transmission path and the processing station, but also reduces power loss and vibration during the steering process by taking advantage of the inherent low backlash and high transmission stability characteristics of worm gear transmission. Attached Figure Description

[0015] Figure 1 This is a first-view cross-sectional structural schematic diagram of the worm gear reducer for the pipe bending machine in this utility model;

[0016] Figure 2 This is a cross-sectional view of the worm gear reducer for the pipe bending machine in this utility model from a second perspective.

[0017] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of each component inside the cover hole device of this utility model.

[0019] In the above attached diagram: 1. Housing; 2. Worm; 3. Worm gear shaft; 31. Worm gear; 4. Output shaft; 5. Upper groove; 6. Upper bearing; 7. Lower groove; 8. Lower bearing; 9. Oil filling pipe; 10. Top plate; 11. Mounting hole; 12. Oil filling hole; 13. Cover hole device; 14. Housing; 15. Inner chamber; 16. Cover plate; 17. Guide plate hole; 18. Locking plate; 19. Plate connecting plate; 20. Plate pin; 21. Opening; 22. Drive plate shaft; 23. Handwheel; 24. Connecting plate; 25. Plate pin; 26. Connecting rod; 27. Upper turntable; 28. Lower turntable; 29. ​​Threaded hole; 30. Through pin hole; 32. Hand screw. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this utility model proposes a worm gear reducer for a pipe bending machine, including a housing 1, a worm 2 rotatably disposed inside the housing 1 as the input end, a worm gear shaft 3 having a worm wheel 31 rotatably disposed inside the housing 1, the worm gear shaft 3 and the worm 2 being perpendicular to each other, the worm wheel 31 on the worm gear shaft 3 meshing with the worm 2, and an output shaft 4 passing through the hollow part of the worm gear shaft 3, the output shaft 4 being coaxially connected to the worm gear shaft 3 by a key connection.

[0022] like Figure 1 As shown, two upper grooves 5 are provided inside the housing 1. Upper bearings 6 are interference-fitted into the upper grooves 5. The two upper bearings 6 are mounted on the worm gear 2 and are used to support the rotation of the worm gear 2.

[0023] like Figure 2 As shown, two lower grooves 7 are provided inside the housing 1. Lower bearings 8 are interference-fitted into the lower grooves 7. The two lower bearings 8 are mounted on the worm gear shaft 3 and are used to support the rotation of the worm gear shaft 3.

[0024] The worm gear reducer used in this pipe bending machine utilizes the meshing worm gear 31 and worm 2 to achieve a 90-degree vertical steering between the power input end and the output end. This transmission method not only cleverly adapts to the spatial layout requirements of the pipe bending machine during operation and avoids interference between the power transmission path and the processing station, but also reduces power loss and vibration during the steering process by taking advantage of the inherent low backlash and high transmission stability characteristics of the worm gear 31 and worm 2 transmission.

[0025] like Figure 1 and 3 As shown, a refueling pipe 9 is fixedly connected to the top of the housing 1. The refueling pipe 9 is located directly above the worm gear 2. A top plate 10 is provided on the top of the refueling pipe 9. A mounting hole 11 is opened at the center of the top plate 10. Several refueling holes 12 are evenly distributed on the outside of the mounting hole 11 on the top plate 10. A cover 13 is inserted into the mounting hole 11 to close the refueling hole 12. The cover 13 includes a cylindrical shell 14, which is inserted into the mounting hole 11. The shell 14 has an inner chamber 15, which is a circular groove. A cover plate 16, which closes the refueling hole 12, is fixedly connected to the upper part of the outer wall of the shell 14. The cover plate 16 has a circular cross-section.

[0026] like Figure 3 and 4 As shown, a guide plate hole 17 is provided through the lower part of the outer side wall of the shell 14. The cross-section of the guide plate hole 17 is rectangular, and there are two guide plate holes 17. A locking plate 18 is slidably disposed in each guide plate hole 17. The locking plate 18 is a rectangular plate. A plate connecting plate 19 is fixedly connected to the end face of the locking plate 18 near the inner chamber 15. A plate pin 20 is provided on both ends of the plate connecting plate 19.

[0027] like Figure 3 and 4 As shown, a movable plate assembly is provided in the inner chamber 15. The movable plate assembly is used to drive the locking plate 18 to reciprocate linearly along the guide plate hole 17. The movable plate assembly includes a drive plate shaft 22, a connecting plate 24, and a connecting rod 26.

[0028] like Figure 3 and 4 As shown, a circular opening 21 is formed through the top surface of the casing 14, and the opening 21 is coaxial with the inner chamber 15. The drive shaft 22 is cylindrical and is rotatably positioned at the center of the inner chamber 15. The drive shaft 22 extends out of the inner chamber 15 through the opening 21, and the drive shaft 22 is rotatably engaged with the opening 21. After passing through the opening 21, the drive shaft 22 is coaxially and fixedly connected to a handwheel 23, which provides a force point for the worker to rotate the drive shaft 22.

[0029] like Figure 3 and 4 As shown, the connecting disk 24 is coaxially fixedly connected to the drive plate shaft 22. The connecting disk 24 is coplanar with the two guide plate holes 17. Two disk pins 25 are equidistantly arranged on both ends of the connecting disk 24.

[0030] like Figure 3 and 4As shown, one end of the connecting rod 26 is hinged to the plate 19 via the plate pin 20, and the other end is hinged to the connecting plate 24 via the disc pin 25. There are two connecting rods 26 between the connecting plate 24 and each plate 19. The two connecting rods 26 are symmetrically arranged on both sides of the connecting plate 24. The arrangement of two connecting rods 26 between the drive plate shaft 22 and the locking plate 18 is beneficial to improving the connection stability between the drive plate shaft 22 and the locking plate 18.

[0031] like Figure 3 and 4 As shown, an upper turntable 27 and a lower turntable 28 are coaxially fixedly connected to the drive shaft 22. Both the upper turntable 27 and the lower turntable 28 are circular plates. Both the upper turntable 27 and the lower turntable 28 are rotatably engaged with the inner chamber 15. The upper turntable 27 and the lower turntable 28 abut against the two end walls of the inner chamber 15, which helps to prevent the drive shaft 22 from vertically jumping.

[0032] like Figure 3 and 4 As shown, a threaded hole 29 is provided on the side wall of the upper turntable 27, and a through hole 30 is provided on the outer side wall of the shell 14. The through hole 30 is provided in half on the two halves of the shell 14, and the through hole 30 is aligned with the threaded hole 29. A hand screw 32 is provided in the through hole 30, and the hand screw 32 is threadedly connected to the threaded hole 29.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A worm gear reducer for a pipe bending machine, characterized in that: The device includes a housing (1), in which a worm gear (2) serving as an input end is rotatably disposed, and a worm wheel shaft (3) with a worm wheel (31) is rotatably disposed within the housing (1). The worm wheel shaft (3) is perpendicular to the worm gear (2), and an output shaft (4) is inserted through the hollow portion of the worm wheel shaft (3). The output shaft (4) is coaxially connected to the worm wheel shaft (3) by a key connection.

2. The worm gear reducer for a pipe bending machine according to claim 1, characterized in that: The housing (1) has several upper grooves (5) inside, and an upper bearing (6) is inserted into the upper groove (5) with an interference fit. The upper bearing (6) is mounted on the worm gear (2).

3. The worm gear reducer for a pipe bending machine according to claim 1, characterized in that: The housing (1) has several lower grooves (7) inside, and a lower bearing (8) is inserted into the lower groove (7) with an interference fit. The lower bearing (8) is mounted on the worm gear shaft (3).

4. The worm gear reducer for a pipe bending machine according to claim 1, characterized in that: The top of the housing (1) is provided with a refueling pipe (9) located directly above the worm gear (2). The top of the refueling pipe (9) is provided with a top plate (10). A mounting hole (11) is provided at the center of the top plate (10). Several refueling holes (12) are evenly distributed outside the mounting hole (11) on the top plate (10). A cover (13) is inserted into the mounting hole (11) to close the refueling hole (12).

5. A worm gear reducer for a pipe bending machine according to claim 4, characterized in that: The cover (13) includes a housing (14) that is inserted into the mounting hole (11). A cover plate (16) is provided on the outer side wall of the housing (14) to close the oil filling hole (12). The housing (14) has an inner chamber (15). A guide plate hole (17) is provided through the outer side wall of the housing (14). A locking plate (18) is slidably provided in the guide plate hole (17). A moving plate assembly is provided in the inner chamber (15).

6. The worm gear reducer for a pipe bending machine according to claim 5, characterized in that: An opening (21) is provided through the top surface of the housing (14). A plate (19) is provided on the end face of the locking plate (18) near the inner chamber (15). Plate pins (20) are provided on both ends of the plate (19). The moving plate assembly includes a drive plate shaft (22), a connecting plate (24), and a connecting rod (26). The drive plate shaft (22) is rotatably located at the center of the inner chamber (15) and its top extends out of the inner chamber (15) through the opening (21). The connecting plate (24) is coaxially located on the drive plate shaft (22). Multiple disc pins (25) are provided on both ends of the connecting plate (24). One end of the connecting rod (26) is hinged to the plate (19) through the plate pins (20), and the other end is hinged to the connecting plate (24) through the disc pins (25).

7. A worm gear reducer for a pipe bending machine according to claim 6, characterized in that: A handwheel (23) is coaxially mounted on the drive shaft (22) after it passes through the opening (21).

8. A worm gear reducer for a pipe bending machine according to claim 6, characterized in that: The drive shaft (22) is coaxially provided with an upper turntable (27) and a lower turntable (28). Both the upper turntable (27) and the lower turntable (28) are rotatably engaged with the inner chamber (15). A threaded hole (29) is provided on the side wall of the lower turntable (28). A through hole (30) aligned with the threaded hole (29) is provided on the outer side wall of the housing (14). A hand screw (32) threaded into the through hole (30) is threadedly connected to the threaded hole (29).

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