Synchronous belt transmission structure for gear hobbing

Abstract

The invention belongs to the field of machine tool machining, and relates to a synchronous belt transmission structure for gear hobbing, which mainly comprises a lathe bed, a rotary drum, a speed reducer, a belt wheel, an opening synchronous belt and the like. The rotary drum is flexibly installed on the lathe bed through a bearing, and the end face of the rotary drum is provided with a first workbench and a second workbench which can be exchanged. The speed reducer drives the belt wheel, power transmission is achieved between the belt wheel and the rotary drum through the opening synchronous belt, and installation and debugging are convenient through the design. The opening synchronous belt is adopted to improve the flexibility; the structure is simplified and the cost is reduced due to the toothless design that the outer circle of the belt wheel is provided with teeth and the outer circle of the drum is smooth; an accurate limiting device ensures accurate limiting during 180-degree reciprocating rotation of the rotary drum, and efficient exchange of the workbenches is achieved; the transmission structure and materials are optimized, the bearing capacity and stability are enhanced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of machine tool processing and relates to a synchronous belt transmission structure used for gear hobbing processing. Background Art

[0002] In the field of mechanical manufacturing and processing, especially in gear hobbing, the accuracy and reliability of the transmission system are crucial to ensuring processing quality and improving production efficiency. For transmissions with a large center distance between two transmission shafts, synchronous belt transmission is usually used. As a key component for transmitting power and realizing motion control, the traditional synchronous belt transmission structure usually uses a closed annular synchronous belt in conjunction with two synchronous pulleys with teeth. Although this structure meets the transmission requirements to a certain extent, with the continuous advancement of processing technology and the increasing requirements for processing accuracy, its limitations are gradually emerging for some new mechanical structures.

[0003] First, the closed ring synchronous belt has obvious inconveniences in installation and maintenance. Due to its closed structure, a large operating space is required when installing or replacing the synchronous belt, and the operation process is complicated and time-consuming. Once the synchronous belt is damaged, it often needs to be replaced as a whole, which not only increases maintenance costs, but also affects production progress.

[0004] Secondly, the traditional synchronous belt drive structure is difficult to achieve efficient and accurate reciprocating rotation when applied to occasions where worktable exchange is required. Especially in the gear hobbing process of the double-table gear hobbing machine, the two worktables need to work alternately to achieve continuous processing and efficient output of the workpiece. However, due to the limitations of the traditional structure, it is often impossible to achieve accurate 180-degree reciprocating rotation, resulting in inaccurate worktable exchange, affecting processing accuracy and efficiency. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a synchronous belt transmission structure for gear hobbing to solve the existing problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a synchronous belt transmission structure for gear hobbing processing, comprising a bed, a drum installed on the bed through a bearing, and a reducer installed on the bed through a receiving plate and a mounting frame, a pulley is installed at the output end of the reducer, and a first workbench and a second workbench are installed on the end surface of the drum through screws; two oblique square holes are also provided on the bed, and the pulley and the drum are connected by an open synchronous belt passing through the oblique square holes; a stop block is also installed on the drum, and limit shafts that are engaged with the stop block are respectively provided on the bed at the upper and lower relative positions of the drum.

[0007] Optionally, the outer circle of the pulley is a toothed structure, and the outer circle of the drum is a smooth structure without teeth.

[0008] Optionally, both ends of the opening of the open synchronous belt are fixed on the rotating drum through fixing components respectively.

[0009] Optionally, the fixing assembly includes a mounting block mounted on the rotating drum by screws, a cushion block mounted on the mounting block, and a pressing block for pressing the open synchronous belt, the cushion block, the mounting block and the rotating drum together by screws.

[0010] Optionally, the upper surface of the pad is configured as a toothed structure.

[0011] Optionally, the outer ring of the bearing is fixed to the bed through screws, and the inner ring of the rotating part of the bearing is fixed to the drum through screws.

[0012] Optionally, a servo motor is connected to the input end of the reducer.

[0013] Optionally, two stoppers are provided, which are arranged opposite to each other on both sides of the top of the drum.

[0014] The beneficial effects of the present invention are:

[0015] 1) The present invention adopts an open synchronous belt to replace the traditional closed ring synchronous belt. This design not only facilitates the installation, replacement and debugging of the synchronous belt, but also makes the synchronous belt more flexible during the transmission process and can adapt to more complex motion trajectories and load changes;

[0016] 2) The present invention adopts a special design so that only one pulley has teeth on its outer circumference, while the outer circumference of the drum is smooth and toothless. This matching method simplifies the transmission structure, reduces the manufacturing cost, and improves the accuracy and stability of the transmission;

[0017] 3) In order to achieve the accurate reciprocating rotation of the drum by 180 degrees, the present invention designs an accurate limiting device. Through the stopper installed on the drum and the limiting shaft on the bed, it can ensure that the drum is accurately limited during the rotation process, thereby achieving efficient and accurate exchange of the workbench;

[0018] 4) The present invention improves the bearing capacity and stability of the synchronous belt transmission structure by optimizing the transmission structure and material selection; even when running for a long time or bearing a large load, the transmission accuracy and reliability can be maintained, thereby extending the service life of the equipment.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is an overall front view of a synchronous belt transmission structure for gear hobbing of the present invention;

[0022] Figure 2 It is an overall top view of a synchronous belt transmission structure for gear hobbing of the present invention;

[0023] Figure 3 It is a schematic diagram of the engagement between a stopper and a limit shaft of a synchronous belt transmission structure for gear hobbing processing according to the present invention;

[0024] Figure 4 A schematic diagram of the installation of a workbench of a synchronous belt transmission structure for gear hobbing processing according to the present invention;

[0025] Figure 5 The present invention is a top view of a workbench of a synchronous belt transmission structure for gear hobbing after installation.

[0026] Figure numerals: bed 1, mounting frame 2, pulley 3, open synchronous belt 4, drum 5, mounting block 6, cushion block 7, pressure block 8, servo motor 9, reducer 10, receiving plate 11, bearing 12, stopper 13, limit shaft 14, first workbench 15, second workbench 16. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figure 1 to Figure 5 , which is a synchronous belt transmission structure for gear hobbing, comprises a bed 1, a drum 5 mounted on the bed 1 through a bearing 12, and a reducer 10 mounted on the bed 1 through a receiving plate 11 and a mounting frame 2, a pulley 3 is mounted on the output end of the reducer 10, and a first workbench 15 and a second workbench 16 are mounted on the end surface of the drum 5 through screws; two oblique square holes are also provided on the bed 1, and the pulley 3 and the drum 5 are connected through an open synchronous belt 4 passing through the oblique square holes; a stopper 13 is also installed on the drum 5, and a limit shaft 14 for engaging with the stopper 13 is respectively provided at the upper and lower relative positions of the drum 5 on the bed 1, and the outer circle of the pulley 3 is a toothed structure, The outer circle of the drum 5 is a smooth structure without teeth. The open ends of the open synchronous belt 4 are fixed to the drum 5 by fixing components respectively. The fixing components include a mounting block 6 installed on the drum 5 by screws, a cushion block 7 installed on the mounting block 6, and a pressing block 8 for pressing the open synchronous belt 4, the cushion block 7, the mounting block 6 and the drum 5 together by screws. The upper surface of the cushion block 7 is set as a toothed structure. The outer ring of the bearing 12 is fixed to the bed 1 by screws, and the inner ring of the rotating part of the bearing 12 is fixed to the drum 5 by screws. The input end of the reducer 10 is connected to the servo motor 9, and two blocks 13 are provided, which are respectively and relatively arranged on both sides of the top of the drum 5.

[0031] Before starting processing, the first workbench 15 and the second workbench 16 are respectively installed on the two end faces of the drum 5. The drum 5 is in the initial position, usually one workbench (such as the first workbench 15) faces the processing area, and the other workbench (such as the second workbench 16) is in the non-processing area; when the workbench needs to be exchanged, the servo motor 9 starts to rotate according to the control signal, and the rotation direction of the servo motor 9 depends on which workbench needs to be exchanged; the rotation of the servo motor 9 is decelerated and increased by the reducer 10, and then transmitted to the toothed pulley 3; the rotation of the toothed pulley 3 drives the open synchronous belt 4 to move; one end of the open synchronous belt 4 is tightly engaged with the toothed pulley 3, and the other end is firmly pressed on the drum 5 through the fixing action of the mounting block 6, the cushion block 7 and the pressure block 8; with the movement of the open synchronous belt 4, the drum 5 starts to rotate.

[0032] Driven by the open synchronous belt 4, the drum 5 performs a 180-degree reciprocating rotation. This rotation process is achieved through the precise control of the servo motor 9, ensuring the accuracy and stability of the rotation. During the rotation of the drum 5, the stopper 13 installed on the drum 5 will contact and be restricted by the limit shaft 14 on the bed 1. This limit device ensures that the drum 5 can stop accurately when it rotates to the predetermined position, thereby realizing the precise exchange of the workbench. When the drum 5 rotates to the 180-degree position, the workbench originally facing the processing area (such as the first workbench 15) will retreat to the non-processing area, and the other workbench (such as the second workbench 16) will face the processing area. This completes the exchange process of the workbench.

[0033] After completing one workbench exchange, the processing equipment can continue to process the next workpiece. When the workbench needs to be exchanged again, just repeat the above process. Through the precise control of the servo motor 9 and the stability of the synchronous belt drive structure, it can be ensured that each workbench exchange is carried out accurately, thereby improving the processing efficiency and accuracy.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A synchronous belt transmission structure for gear hobbing, characterized in that: It includes a bed, a rotating drum mounted on the bed through a bearing, and a reducer mounted on the bed through a receiving plate and a mounting frame, a pulley is mounted on the output end of the reducer, and a first workbench and a second workbench are mounted on the end surface of the rotating drum through screws; The bed is also provided with two oblique square holes, and the pulley is connected to the drum through an open synchronous belt passing through the oblique square holes; a stopper is also installed on the drum, and limiting shafts for engaging the stopper are respectively provided on the bed at upper and lower relative positions of the drum.

2. A synchronous belt transmission structure for gear hobbing according to claim 1, characterized in that: The outer circle of the pulley is a toothed structure, and the outer circle of the drum is a smooth structure without teeth.

3. The synchronous belt transmission structure for gear hobbing according to claim 1, characterized in that: The two ends of the opening of the open synchronous belt are respectively fixed on the rotating drum through fixing components.

4. A synchronous belt transmission structure for gear hobbing according to claim 3, characterized in that: The fixing assembly comprises a mounting block mounted on the rotating drum through screws, a cushion block mounted on the mounting block, and a pressing block for pressing the open synchronous belt, the cushion block, the mounting block and the rotating drum together through screws.

5. A synchronous belt transmission structure for gear hobbing according to claim 4, characterized in that: The upper surface of the pad is arranged as a toothed structure.

6. The synchronous belt transmission structure for gear hobbing according to claim 1, characterized in that: The outer ring of the bearing is fixed to the bed through screws, and the inner ring of the rotating part of the bearing is fixed to the drum through screws.

7. The synchronous belt transmission structure for gear hobbing according to claim 1, characterized in that: The input end of the reducer is connected with a servo motor.

8. The synchronous belt transmission structure for gear hobbing according to claim 3, characterized in that: There are two stoppers, which are respectively arranged on two sides of the top of the rotating drum in opposite directions.

Images