Anti-backlash structure for indexing gear pair of workbench of oversize gear hobbing machine

Abstract

The utility model discloses a clearance eliminating structure for an indexing gear pair of an oversize gear hobbing machine workbench, which relates to the technical field of oversize gear hobbing machine workbenches and comprises a first gear shaft and second gear shafts, the second gear shafts are vertically arranged on the left side and the right side of the first gear shaft, and a piston component is arranged at the upper end of a third gear shaft. The middle section of the third gear shaft is provided with a wheel pair. According to the clearance eliminating structure for the indexing gear pair of the working table of the oversize gear hobbing machine, through structural transmission of the first gear shaft in the middle, the second gear shaft, the third gear shaft and the fourth gear shaft which are symmetrically arranged on the left side and the right side can be driven one by one to synchronously and axially rotate, and structural cooperation and driving transmission of the large gear ring and the working table main shaft are matched; the double-drive movement is achieved, the operation efficiency of the device is guaranteed, meanwhile, the structural impact can be reduced by adopting the structural arrangement of the wheel pair of a helical tooth structure, and the noise of structural operation is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of extra-large gear hobbing machine worktables, specifically to a backlash-eliminating structure for the indexing gear pair of an extra-large gear hobbing machine worktable. Background Technology

[0002] The extra-large gear hobbing machine worktable is an important component of the gear hobbing machine, mainly used to support and position the workpiece, ensuring stability and accuracy during the machining process. The backlash-free structure of the indexing gear pair is mainly used in the transmission system of the drive box of the indexing gear pair of the extra-large gear hobbing machine worktable.

[0003] Currently, the drive and indexing of medium and large gear hobbing machines mainly adopt worm gear pairs, but the accuracy of large-sized worm gears is difficult to guarantee.

[0004] Therefore, in view of this, we studied and improved the existing structure and its shortcomings, and proposed a backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable. Utility Model Content

[0005] The purpose of this utility model is to provide a backlash-free structure for the indexing gear pair of an extra-large gear hobbing machine worktable, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a backlash-free structure for an indexing gear pair on a large gear hobbing machine worktable, comprising a first gear shaft and a second gear shaft, the second gear shaft being vertically arranged on the left and right sides of the first gear shaft, and a third gear shaft being vertically arranged on the side of the second gear shaft away from the first gear shaft, and a fourth gear shaft being vertically arranged on the side of the third gear shaft away from the second gear shaft, and a piston component being provided at the upper end of the third gear shaft, while a gear pair is installed in the middle section of the third gear shaft.

[0007] Furthermore, a large gear ring is connected to one side of the upper end of the fourth gear shaft, and the main spindle of the worktable is vertically connected to the middle of the large gear ring.

[0008] Furthermore, the bottom ends of the first gear shaft, the second gear shaft, the third gear shaft, and the fourth gear shaft are all connected to indexing structure housings, and the top ends of the first gear shaft, the second gear shaft, the third gear shaft, and the fourth gear shaft are all equipped with matching top cover structures.

[0009] Furthermore, gear structures are installed at the lower ends of the first gear shaft, the second gear shaft, the third gear shaft, and the fourth gear shaft are sequentially meshed with each other through the gear structures.

[0010] Furthermore, the piston component is located on the upper side of the third gear shaft, and the gear pair adopts a helical tooth structure.

[0011] Furthermore, an indexing gear structure is installed at the upper end of the fourth gear shaft, and the fourth gear shaft is meshed with the large gear ring through the indexing gear structure.

[0012] Furthermore, the large gear ring is fixedly connected to the worktable spindle, and the worktable spindle and the large gear ring are on the same vertical central axis.

[0013] Furthermore, the lower ends of the first gear shaft, the second gear shaft, the third gear shaft, and the fourth gear shaft are all connected to the indexing structure housing through a bearing seat structure, and the upper ends of the first gear shaft, the second gear shaft, the third gear shaft, and the fourth gear shaft are all connected to the upper cover structure through a bearing seat structure. Moreover, the upper cover structure and the indexing structure housing are fixed together by a sealing structure.

[0014] This utility model provides a backlash-eliminating structure for the indexing gear pair of an extra-large gear hobbing machine worktable, which has the following beneficial effects:

[0015] 1. This utility model connects one end of a first gear shaft to an upstream drive device via a transmission structure, thereby inputting rotational motion through the first gear shaft. Since the first gear shaft is sequentially meshed with the second, third, and fourth gear shafts symmetrically arranged on the left and right sides using a gear structure, it can simultaneously drive the second, third, and fourth gear shafts to rotate vertically along the axis. At the same time, since the fourth gear shaft is meshed with a large gear ring through an indexing gear structure, it drives the worktable connected to the main spindle of the worktable to rotate, thereby achieving dual-drive motion. This ensures the operational flexibility of the device structure and provides sufficient structural drive.

[0016] 2. This utility model features a piston component at the upper end of the third gear shaft and a helical gear pair installed in the middle section of the third gear shaft. When hydraulic oil is applied to the piston component, it undergoes vertical expansion and contraction, causing the third gear shaft and the gears on it to move axially. Since the gear pair is a helical gear pair with opposite tooth directions, changing the meshing position during rotation alters the meshing clearance, reducing it and thus lowering noise and smoothing the movement. This structural design allows for appropriate adjustments to the gear pair's meshing, resulting in a more reasonable backlash. This minimizes structural impact and noise from friction, improves movement stability, extends the gear pair's lifespan, and reduces maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the backlash-eliminating structure of the indexing gear pair on the worktable of an extra-large gear hobbing machine according to the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the support body of the backlash-free structure of the indexing gear pair of the worktable of an extra-large gear hobbing machine according to this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the arc-shaped cover for eliminating backlash in the indexing gear pair of an extra-large gear hobbing machine worktable, according to this utility model.

[0020] In the diagram: 1. First gear shaft; 2. Second gear shaft; 3. Third gear shaft; 4. Fourth gear shaft; 5. Piston assembly; 6. Gear pair; 7. Large gear ring; 8. Worktable spindle; 9. Indexing structure housing; 10. Top cover structure. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] like Figures 1 to 3 As shown, a backlash-free structure for an indexing gear pair on a large gear hobbing machine worktable includes a first gear shaft 1 and a second gear shaft 2. The second gear shaft 2 is vertically arranged on the left and right sides of the first gear shaft 1. A third gear shaft 3 is vertically arranged on the side of the second gear shaft 2 furthest from the first gear shaft 1. A fourth gear shaft 4 is vertically arranged on the side of the third gear shaft 3 furthest from the second gear shaft 2. A piston component 5 is provided at the upper end of the third gear shaft 3, and a gear pair 6 is installed in the middle section of the third gear shaft 3.

[0023] A large gear ring 7 is connected to one side of the upper end of the fourth gear shaft 4, and a worktable spindle 8 is vertically connected to the middle of the large gear ring 7. The bottom ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 are all connected to an indexing structure housing 9, and the top ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 are all equipped with matching top cover structures 10. The rotational motion is input through the first gear shaft 1. Since the first gear shaft 1 is connected to the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4, which are symmetrically arranged on the left and right sides, by means of a gear structure, they can be meshed sequentially, thereby driving the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 to rotate vertically axially together at the same time.

[0024] like Figures 1 to 3 As shown, gear structures are installed at the lower ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4. These gear structures enable sequential meshing between the lower ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4. The piston component 5 is located on the upper side of the third gear shaft 3. The gear pair 6 employs a helical gear structure. An indexing gear structure is installed at the upper end of the fourth gear shaft 4, and the fourth gear shaft 4 meshes with the large gear ring 7 through the indexing gear structure. The large gear ring 7 is fixedly connected to the worktable spindle 8, and the worktable spindle 8 and the large gear ring 7 are on the same vertical central axis. The lower ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 are all connected to the indexing structure housing 9 through a bearing seat structure. The upper ends of the first gear shaft 1, the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 are all connected to the upper cover structure 10 through a bearing seat structure. The upper cover structure 10 and the indexing structure housing 9 are fixed together by a sealing structure. When hydraulic oil is applied to the piston component 5, the piston component 5 will make structural extension and contraction adjustments in the vertical direction, thereby moving the third gear shaft 3 below it and the gear on the third gear shaft 3 in the axial direction.

[0025] In summary, as Figures 1 to 3 As shown, the backlash-free structure of the indexing gear pair on the worktable of this extra-large gear hobbing machine is used by first connecting the entire device structure to the power output end of the external drive equipment through a coupling via the first gear shaft 1 installed in the middle of the inner part of the indexing structure housing 9. When the external drive structure is in operation, it will drive the first gear shaft 1 connected to it to rotate axially, thereby sequentially driving the second gear shaft 2, the third gear shaft 3, and the fourth gear shaft 4 on the left and right sides to rotate axially through the gear structure meshing in sequence.

[0026] As the fourth gear shafts 4 on both the left and right sides are driven, the upper end of the fourth gear shaft 4 is connected to the large gear ring 7 through the indexing gear structure, which further drives the worktable connected to the main spindle 8 of the worktable to rotate, thereby realizing dual-drive motion.

[0027] During the axial rotation of the third gear shaft 3, when hydraulic oil is applied to the piston component 5, it will drive the piston component 5 to make structural extension and contraction adjustments in the vertical direction. This will push the third gear shaft 3 below it and the gear on the third gear shaft 3 in the axial direction, thereby changing the meshing position of the gear pair 6 and changing the meshing clearance to make it smaller, thereby reducing the noise of the gear pair 6 and making the movement smoother.

[0028] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable, comprising a first gear shaft (1) and a second gear shaft (2), characterized in that: The first gear shaft (1) is vertically provided with a second gear shaft (2) on its left and right sides, and a third gear shaft (3) is vertically provided on the side of the second gear shaft (2) away from the first gear shaft (1). A fourth gear shaft (4) is vertically provided on the side of the third gear shaft (3) away from the second gear shaft (2). A piston component (5) is provided at the upper end of the third gear shaft (3), and a gear pair (6) is installed in the middle section of the third gear shaft (3).

2. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 1, characterized in that, The upper end of the fourth gear shaft (4) is connected to a large gear ring (7), and the middle of the large gear ring (7) is vertically connected to the worktable spindle (8).

3. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 1, characterized in that, The bottom ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are all connected to the indexing structure housing (9), and the top ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are all equipped with matching top cover structures (10).

4. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 1, characterized in that, The lower ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are all equipped with gear structures, and the lower ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are sequentially meshed with each other through the gear structures.

5. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 1, characterized in that, The piston component (5) is located on the upper side of the third gear shaft (3), and the gear pair (6) is configured with a helical tooth structure.

6. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 2, characterized in that, The upper end of the fourth gear shaft (4) is equipped with an indexing gear structure, and the fourth gear shaft (4) is meshed with the large gear ring (7) through the indexing gear structure.

7. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 2, characterized in that, The large gear ring (7) is fixedly connected to the worktable spindle (8), and the worktable spindle (8) and the large gear ring (7) are on the same vertical central axis.

8. The backlash-free structure for the indexing gear pair of a large gear hobbing machine worktable according to claim 3, characterized in that, The lower ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are all connected to the indexing structure housing (9) through a bearing seat structure. The upper ends of the first gear shaft (1), the second gear shaft (2), the third gear shaft (3), and the fourth gear shaft (4) are all connected to the upper cover structure (10) through a bearing seat structure. Moreover, the upper cover structure (10) and the indexing structure housing (9) are fixed together by a sealing structure.

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