Static pressure structure of workbench of large gear hobbing machine

Abstract

The utility model discloses a large-scale gear hobbing machine workbench static pressure structure, which relates to the technical field of gear hobbing machines, and comprises a base and a centering assembly, the top of the base is provided with a rotary table, the top of the rotary table is provided with a cover plate, and the centering assembly is arranged in the middle of the rotary table. The centering assembly comprises a centering cone, a connecting hole, a reinforcing rib, a first liquid conveying pipe and a first liquid outlet hole, the connecting hole is formed in the bottom of the centering cone, and the reinforcing rib is fixed to the inner side of the centering cone. According to the static pressure structure of the working table of the large gear hobbing machine, the centering assembly is arranged, the end of the first liquid conveying pipe is connected with the external multi-head pump, and meanwhile, the equant static pressure oil cavities are designed at the first liquid outlet hole of the centering cone in a pouring mode, so that hydraulic oil with constant flow can be provided for each oil cavity through the multi-head pump; a static pressure oil film is formed between the conical surface of the rotary table and the conical surface of the centering cone, and meanwhile axial and radial supporting force is provided.

Description

Technical Field

[0001] This utility model relates to the field of gear hobbing machine technology, specifically to a static pressure structure for a large gear hobbing machine worktable. Background Technology

[0002] The gear hobbing machine is one of the most widely used gear processing machine tools. It can cut spur gears, helical gears, worm gears, sprockets, etc. It is a gear processing machine tool that uses hobs to process spur gears, helical gears, herringbone gears, and worm gears using the generating method. In the process of processing large gear hobbing machines, a rotary table is required to support large workpieces.

[0003] When supporting large workpieces, the thickness of the oil film in the existing hydrostatic structure of the worktable tends to change with the load, which affects its stability and operational accuracy.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a hydrostatic structure for the worktable of a large gear hobbing machine. Utility Model Content

[0005] The purpose of this utility model is to provide a hydrostatic structure for a large gear hobbing machine worktable to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydrostatic structure for a large gear hobbing machine worktable, comprising a base and a centering assembly. A rotary table is provided on the top of the base, and a cover plate is installed on the top of the rotary table. The centering assembly is located in the middle of the rotary table. The centering assembly includes a centering cone, a connecting hole, a reinforcing rib, a first infusion pipe, and a first outlet hole. A connecting hole is provided at the bottom of the centering cone, and a reinforcing rib is fixed on the inner side of the centering cone. A first infusion pipe is installed on one side of the reinforcing rib, and a first outlet hole is provided on the outer side of the centering cone.

[0007] Furthermore, the inner side of the rotary table is conical, and the taper of the inner side of the rotary table matches the taper of the centering cone.

[0008] Furthermore, the reinforcing ribs are triangular in shape and are equidistantly distributed circumferentially about the inner side of the centering cone.

[0009] Furthermore, the first outlet holes are equidistantly distributed in a circular pattern about the outer side of the centering cone, and the first outlet holes are connected to the first infusion tube.

[0010] Furthermore, a connecting lug is provided at the outer top of the centering cone, and a top cover is provided at the center of the top of the centering cone.

[0011] Furthermore, a support assembly is provided on the top of the base. The support assembly includes an outer ring static pressure support plate and an inner ring static pressure support plate. The outer ring static pressure support plate is installed at the top outer end of the outer ring static pressure support plate, and the inner ring static pressure support plate is fixed in the middle of the top surface of the outer ring static pressure support plate.

[0012] Furthermore, the outer ring hydrostatic support plate and the inner ring hydrostatic support plate are equidistantly distributed in a circle about the bottom of the rotary table, and the rotary table is slidably connected to the outer ring hydrostatic support plate and the inner ring hydrostatic support plate respectively.

[0013] Furthermore, the support assembly also includes a second infusion tube and a second outlet hole. The outer ring static pressure support plate and the inner ring static pressure support plate are each connected to a second infusion tube on one side, and the top of the outer ring static pressure support plate and the inner ring static pressure support plate are each provided with a second outlet hole.

[0014] This utility model provides a hydrostatic structure for a large gear hobbing machine worktable, which has the following advantages:

[0015] 1. This utility model, through the setting of the centering component, since the end of the first infusion pipe is connected to an external multi-head pump, and the centering cone is designed with equally divided static pressure oil chambers at the first outlet hole through casting, can provide a constant flow of hydraulic oil to each oil chamber through the multi-head pump, forming a static pressure oil film between the cone surface of the rotary table and the cone surface of the centering cone, while providing axial and radial support forces. Since the oil chamber surface of the centering cone is designed with a conical structure, a closed static pressure structure is naturally formed in the axial and radial directions. Within the design requirements, the oil film thickness hardly changes with the load, resulting in good rigidity, strong load-bearing capacity, smooth operation, and good precision retention.

[0016] 2. Through the setting of the support components, this utility model can provide a constant flow of hydraulic oil to each oil chamber by installing an outer ring hydrostatic support plate and an inner ring hydrostatic support plate that are evenly distributed on the inner and outer ring planes of the base. At the same time, the second infusion pipe is connected to an external multi-head pump. This provides axial support force by forming a hydrostatic oil film between the bottom surface of the rotary table and the hydrostatic support plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the hydrostatic structure of a large gear hobbing machine worktable according to the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the support component of the hydrostatic structure of a large gear hobbing machine worktable according to the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the centering component of the hydrostatic structure of a large gear hobbing machine worktable according to this utility model.

[0020] In the diagram: 1. Base; 2. Rotary table; 3. Cover plate; 4. Centering assembly; 401. Centering cone; 402. Connecting hole; 403. Reinforcing rib; 404. First infusion tube; 405. First outlet hole; 5. Connecting lug; 6. Top cover; 7. Support assembly; 701. Outer ring static pressure support plate; 702. Inner ring static pressure support plate; 703. Second infusion tube; 704. Second outlet hole. 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 Figure 1 and Figure 3 As shown, a hydrostatic structure for a large gear hobbing machine worktable includes a base 1 and a centering assembly 4. A rotary table 2 is mounted on the top of the base 1, and a cover plate 3 is installed on the top of the rotary table 2. The cover plate 3 can cover the middle part of the rotary table 2. The centering assembly 4 is located in the middle of the rotary table 2. The centering assembly 4 includes a centering cone 401, a connecting hole 402, a reinforcing rib 403, a first infusion pipe 404, and a first outlet hole 405. The bottom of the centering cone 401 has an opening. It has a connecting hole 402, and a reinforcing rib 403 is fixed on the inner side of the centering cone 401. The inner side of the rotary table 2 is conical, and the taper of the inner side of the rotary table 2 matches the taper of the centering cone 401. Because the oil cavity surface of the centering cone 401 is designed as a conical structure, a closed hydrostatic structure is naturally formed in the axial and radial directions. Within the design requirements, the oil film thickness hardly changes with the load. It has good rigidity, strong load-bearing capacity, smooth operation, and good precision retention. The reinforcing rib 403... A first infusion tube 404 is installed on one side of the centering cone 401. A first outlet hole 405 is opened on the outer side of the centering cone 401. The reinforcing ribs 403 are triangular in shape and are equidistantly distributed in a circular pattern about the inner side of the centering cone 401. The reinforcing ribs 403 can improve the overall strength and stability of the centering cone 401. The first outlet hole 405 is equidistantly distributed in a circular pattern about the outer side of the centering cone 401 and is connected to the first infusion tube 404. During use, the multi-head pump can provide a constant flow of hydraulic oil to each oil chamber inside the outer end of the centering cone 401, so that the oil flows out from the first outlet hole 405 and forms a static pressure oil film between the cone surface of the rotary table 2 and the cone surface of the centering cone 401. The top outer end of the centering cone 401 is provided with a connecting lug 5, and the top center of the centering cone 401 is provided with a top cover 6. The connecting lug 5 is used to easily lift the centering cone 401 and move it to the middle of the base 1.

[0023] like Figure 2As shown, a support assembly 7 is provided on the top of the base 1. The support assembly 7 includes an outer ring static pressure support plate 701 and an inner ring static pressure support plate 702. The outer ring static pressure support plate 701 is installed at the top outer end, and the inner ring static pressure support plate 702 is fixed in the middle of the top surface of the outer ring static pressure support plate 701. The support assembly 7 also includes a second infusion tube 703 and a second outlet hole 704. A second infusion tube 703 is connected to one side of both the outer ring static pressure support plate 701 and the inner ring static pressure support plate 702, and a second infusion tube 703 is opened on the top of both the outer ring static pressure support plate 701 and the inner ring static pressure support plate 702. The outlet hole 704, the outer ring hydrostatic support plate 701, and the inner ring hydrostatic support plate 702 are equidistantly distributed circumferentially about the bottom of the rotary table 2, and the rotary table 2 is slidably connected to the outer ring hydrostatic support plate 701 and the inner ring hydrostatic support plate 702 respectively. The oil is delivered to the oil chambers of the outer ring hydrostatic support plate 701 and the inner ring hydrostatic support plate 702 through the multi-head pump and the second liquid delivery pipe 703, providing a constant flow of hydraulic oil to each oil chamber and flowing out from the second outlet hole 704, thereby forming a hydrostatic oil film between the bottom surface of the rotary table 2 and the hydrostatic support plate to provide axial support force and maintain the stability of the rotary table 2 when rotating.

[0024] In summary, the hydrostatic structure of the worktable of this large gear hobbing machine, when used, should first be based on... Figure 1 , Figure 2 and Figure 3 In the structure shown, during assembly, the rotary table 2 is first placed on top of the base 1. Then, the centering cone 401 is easily lifted and moved to the center of the base 1 using the connecting lugs 5. Next, the centering cone 401 is fixed to the base 1 using bolts and connecting holes 402, and the cover plate 3 is installed. Then, the ends of the first infusion tube 404 and the second infusion tube 703 are connected to an external multi-head pump. During use, the multi-head pump provides a constant flow of hydraulic pressure to each oil chamber inside the outer end of the centering cone 401. The oil flows out from the first outlet hole 405, forming a hydrostatic oil film between the conical surfaces of the rotary table 2 and the centering cone 401, while providing axial and radial support forces. Finally, the oil is delivered to the oil chambers of the outer ring hydrostatic support plate 701 and the inner ring hydrostatic support plate 702 through the multi-head pump and the second delivery pipe 703, providing a constant flow rate of hydraulic oil to each oil chamber, and flowing out from the second outlet hole 704, thereby forming a hydrostatic oil film between the bottom surface of the rotary table 2 and the hydrostatic support plate to provide axial support forces.

[0025] 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 hydrostatic structure for a large gear hobbing machine worktable, comprising a base (1) and a centering assembly (4), characterized in that, The base (1) is provided with a rotary table (2) on top, and a cover plate (3) is provided on the top of the rotary table (2). The centering component (4) is provided in the middle of the rotary table (2). The centering component (4) includes a centering cone (401), a connecting hole (402), a reinforcing rib (403), a first infusion tube (404), and a first outlet hole (405). The bottom of the centering cone (401) is provided with a connecting hole (402), and a reinforcing rib (403) is fixed on the inner side of the centering cone (401). The first infusion tube (404) is provided on one side of the reinforcing rib (403), and the first outlet hole (405) is provided on the outer side of the centering cone (401).

2. The hydrostatic structure of a large gear hobbing machine worktable according to claim 1, characterized in that, The inner side of the rotary table (2) is conical, and the inner taper of the rotary table (2) matches the taper of the centering cone (401).

3. The hydrostatic structure of a large gear hobbing machine worktable according to claim 1, characterized in that, The reinforcing rib (403) is triangular in shape, and the reinforcing rib (403) is equidistantly distributed in a circle about the inner side of the centering cone (401).

4. The hydrostatic structure of a large gear hobbing machine worktable according to claim 1, characterized in that, The first outlet hole (405) is equidistantly distributed in a circle about the outer side of the centering cone (401), and the first outlet hole (405) is connected to the first infusion tube (404).

5. The hydrostatic structure of a large gear hobbing machine worktable according to claim 1, characterized in that, The centering cone (401) has a connecting ear (5) at its top outer end, and a top cover (6) is provided at the center of the top of the centering cone (401).

6. The hydrostatic structure of a large gear hobbing machine worktable according to claim 5, characterized in that, The base (1) is provided with a support assembly (7) at its top. The support assembly (7) includes an outer ring static pressure support plate (701) and an inner ring static pressure support plate (702). The outer ring static pressure support plate (701) is placed at the top outer end of the outer ring static pressure support plate (701), and the inner ring static pressure support plate (702) is fixed at the middle of the top surface of the outer ring static pressure support plate (701).

7. The hydrostatic structure of a large gear hobbing machine worktable according to claim 6, characterized in that, The outer ring static pressure support plate (701) and the inner ring static pressure support plate (702) are equidistantly distributed around the bottom of the rotary table (2), and the rotary table (2) is slidably connected to the outer ring static pressure support plate (701) and the inner ring static pressure support plate (702) respectively.

8. The hydrostatic structure of a large gear hobbing machine worktable according to claim 6, characterized in that, The support assembly (7) also includes a second infusion tube (703) and a second outlet hole (704). The outer ring static pressure support plate (701) and the inner ring static pressure support plate (702) are each connected to a second infusion tube (703) on one side, and the top of the outer ring static pressure support plate (701) and the inner ring static pressure support plate (702) are each provided with a second outlet hole (704).

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