Adjustable positioning device for gear hobbing

Abstract

The utility model relates to a positioning device, more particularly to an adjustable positioning device for gear disc hobbing machining. It comprises a three-jaw chuck, a plurality of clamping jaws are slidably connected to the three-jaw chuck, a driving mechanism is arranged at the bottom of the three-jaw chuck, the driving mechanism is used to move and rotate the three-jaw chuck, a positioning mechanism is arranged on the clamping jaws, and the positioning mechanism is used to extrude and fix the top of the annular blank. The annular blank is placed on the three-jaw chuck, the clamping jaws are located inside the annular blank, the staff drives the three-jaw chuck to move the clamping jaws radially synchronously by using a wrench, the moving clamping jaws clamp the inner wall of the annular blank horizontally, then the staff drives the positioning bolts to rotate by using the wrench, the positioning blocks are driven to move close to the annular blank, the moving positioning blocks extrude the top of the annular blank vertically, and the annular blank remains stable during the hobbing process under the extrusion of the clamping jaws and the positioning blocks.

Description

Technical Field

[0001] This utility model relates to a positioning device, specifically, to an adjustable positioning device for gear hobbing of a gear plate. Background Technology

[0002] Gear hobbing is a common method for manufacturing gears on gear machining tools using gear hobs. Its working principle is similar to the meshing of a worm gear. By simulating the continuous meshing process of a pair of gears, the tool and the ring blank move relative to each other, "enveloping" the correct gear tooth profile. It can efficiently and accurately machine spur gears, helical gears, and worm gears. When fixing the ring blank in gear hobbing, the three-jaw chuck usually uses radial clamping to fix the ring blank. However, the ring blank generates vertical friction during the machining process. Under the action of friction, one side of the ring blank moves slightly downward, while the other side moves slightly upward. This causes the three-jaw chuck to tilt, resulting in deviations in the hobbing process and a decrease in the machining effect of the ring blank. Although the fixed mandrel fixing method can effectively suppress the tilting of the ring blank, the diameter of the fixed mandrel remains unchanged. When it is necessary to fix ring blanks of different sizes, the operator needs to spend a long time changing the fixed mandrel of different sizes, thus reducing the efficiency of ring blank hobbing. In view of this, we propose an adjustable positioning device for gear hobbing. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable positioning device for gear hobbing of gear discs, so as to solve the problem mentioned in the background art that the existing annular blanks are misaligned or inconvenient to replace during the gear hobbing process.

[0004] To address the aforementioned problems, the present invention aims to provide an adjustable positioning device for gear hobbing of a gear disc, comprising a three-jaw chuck with several jaws slidably connected thereon. A driving mechanism is located at the bottom of the three-jaw chuck, which drives the three-jaw chuck to move and rotate. A positioning mechanism is provided on each jaw, which presses and fixes the top of an annular blank. The positioning mechanism includes a mounting block bolted to the top of the jaws, and an adjustable pressing component is located on the upper side of the mounting block. When the three-jaw chuck fixes the annular blank, one side of the mounting block is in close contact with the inner wall of the annular blank, and the pressing component applies a vertically downward force to the top of the annular blank.

[0005] As a further improvement to this technical solution, the extrusion assembly includes an L-shaped positioning block, which includes a vertical section and a horizontal section, and the positioning block is located above the mounting block.

[0006] As a further improvement to this technical solution, a positioning screw is rotatably connected inside the vertical section of the positioning block, and the lower end of the positioning screw passes through the positioning block and is threaded into the interior of the mounting block.

[0007] As a further improvement to this technical solution, two positioning holes are provided on the upper side of the mounting block, and two positioning rods are fixedly connected to the lower side of the vertical section of the positioning block, with the positioning rods slidably inserted into the positioning holes.

[0008] As a further improvement to this technical solution, the positioning rod and the positioning screw are arranged in parallel, and the positioning block moves along the axial direction of the positioning rod under the constraint of the positioning rod.

[0009] As a further improvement to this technical solution, the vertical and horizontal sections of the positioning block and the side of the mounting block near the annular blank are fixedly connected with anti-slip rubber pads, which fill the gaps between the positioning block and the mounting block and the annular blank.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This adjustable positioning device for gear hobbing involves placing the annular blank on a three-jaw chuck with the jaws positioned inside the blank. The operator uses a wrench to drive the three-jaw chuck, causing the jaws to move radially in sync. The moving jaws clamp the inner wall of the annular blank horizontally. Then, the operator uses a wrench to turn the positioning bolt, causing it to move the positioning block closer to the annular blank. The moving positioning block vertically presses against the top of the annular blank. Under the combined pressing action of the jaws and the positioning block, the annular blank remains stable during the gear hobbing process. At the same time, the three-jaw chuck can fix annular blanks of different sizes, thereby improving the effect and efficiency of the gear hobbing process. Attached Figure Description

[0011] Figure 1 This is one of the overall structural schematic diagrams of this utility model; Figure 2 This is the second schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the drive mechanism in this utility model; Figure 4 This is a schematic diagram of the positioning mechanism in this utility model; Figure 5 This is one of the cross-sectional views of the positioning mechanism in this utility model; Figure 6 This is one of the cross-sectional views of the positioning mechanism in this utility model.

[0012] The meanings of the labels in the diagram are as follows: 1. Three-jaw chuck; 11. Chucks; 2. Positioning mechanism; 21. Mounting block; 22. Positioning block; 23. Positioning screw; 24. Positioning rod; 3. Drive mechanism; 31. Electric slide table; 32. Moving frame; 33. Servo motor. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0014] Please see Figure 1 - Figure 6 As shown, the purpose of this embodiment is to provide an adjustable positioning device for gear hobbing of a gear plate, including a three-jaw chuck 1. The three-jaw chuck 1 is existing technology and will not be improved in this solution, so it will not be described here. Several jaws 11 are slidably connected to the three-jaw chuck 1. A drive mechanism 3 is provided at the bottom of the three-jaw chuck 1. The drive mechanism 3 is used to drive the three-jaw chuck 1 to move and rotate. The drive mechanism 3 includes an electric slide table 31. The electric slide table 31 is existing technology and will not be improved in this solution, so it will not be described here. A movable frame 32 is slidably connected to the electric slide table 31. The three-jaw chuck 1 rotates... Connected to the upper side of the movable frame 32, the electric slide table 31 drives the movable frame 32 to move, thereby moving the three-jaw chuck 1 and the annular blank and adjusting the position of the annular blank. The movable frame 32 is internally fixedly connected to a servo motor 33. The servo motor 33 is existing technology and will not be improved in this solution, so it will not be described here. The output shaft of the servo motor 33 passes through the top of the movable frame 32 and is coaxially fixedly connected to the bottom of the three-jaw chuck 1. During the rotation, the output shaft of the servo motor 33 drives the three-jaw chuck 1 and the annular blank to rotate, thereby performing gear hobbing on different positions of the annular blank. The clamping effect of the three-jaw chuck 1 on the annular blank in the vertical direction is less than its effect on the horizontal direction. To prevent the annular blank from tilting in the vertical direction and to improve the vertical restraint effect, a positioning mechanism 2 is provided on the jaw 11. The positioning mechanism 2 presses and fixes the top of the annular blank. The positioning mechanism 2 includes a mounting block 21 connected to the top of the jaw 11 by bolts. An adjustable pressing component is provided on the upper side of the mounting block 21. After the three-jaw chuck 1 fixes the annular blank, one side of the mounting block 21 is in close contact with the inner wall of the annular blank. The pressing component applies a vertically downward force to the top of the annular blank. Under the synergistic pressing of the pressing component and the mounting block 21, the annular blank remains stable during the gear hobbing process, preventing the annular blank from tilting during the gear hobbing process, thereby improving the effect and processing efficiency of the gear hobbing of the annular blank.

[0015] refer to Figure 4 - Figure 6 The extrusion assembly includes an L-shaped positioning block 22, which has a vertical section and a horizontal section. The positioning block 22 is located above the mounting block 21. A positioning screw 23 is rotatably connected inside the vertical section of the positioning block 22. The lower end of the positioning screw 23 passes through the positioning block 22 and is threaded into the interior of the mounting block 21. The upper end of the positioning screw 23 passes through the top of the positioning block 22 and is fixedly connected to a knob. During the process of fixing the annular blank under pressure, the operator turns the knob with a wrench to drive the positioning screw 23 to rotate, causing the positioning block 22 to move towards the annular blank. The moving positioning block 22 presses the annular blank onto the three-jaw chuck 1 to fix the annular blank.

[0016] Meanwhile, anti-slip rubber pads are fixedly connected to the vertical and horizontal sections of the positioning block 22 and the side of the mounting block 21 near the annular blank. The anti-slip rubber pads fill the gaps between the positioning block 22 and the mounting block 21 and the annular blank, making the positioning block 22 and the mounting block 21 fit more tightly with the annular blank, thereby reducing the movement space of the annular blank and preventing the annular blank from shaking slightly during the gear hobbing process. At the same time, the anti-slip rubber pads increase the friction between the positioning block 22 and the mounting block 21 and the annular blank, reducing the probability of the annular blank rotating during the gear hobbing process, and further improving the stability of the annular blank during the gear hobbing process.

[0017] Two positioning holes are provided on the upper side of the mounting block 21. Two positioning rods 24 are fixedly connected to the lower side of the vertical section of the positioning block 22. The positioning rods 24 are slidably inserted into the positioning holes. The positioning rods 24 are arranged parallel to the positioning screw 23. Under the restriction of the positioning rods 24, the positioning block 22 is prevented from rotating with the positioning screw 23 during rotation, so that the positioning block 22 moves along the axis of the positioning rods 24. A storage groove is provided on the lower side of the positioning block 22 near the positioning screw 23. A sleeve is provided between the positioning block 22 and the mounting block 21. The bellows tube on the outside of the positioning screw 23 has its two ends fixedly connected to the upper side of the mounting block 21 and the inner wall of the storage groove, respectively. The bellows tube blocks dust and prevents it from adhering to the positioning screw 23, thus preventing dust accumulation from affecting the normal movement of the positioning block 22 along the axis of the positioning screw 23. When the bottom of the positioning block 22 contacts the top of the mounting block 21, the bellows tube retracts into the storage groove, allowing the storage groove to store the bellows tube and preventing the thickness of the retracted bellows tube from causing a gap between the mounting block 21 and the positioning block 22.

[0018] When using this device: In the initial state, several jaws 11 are closed and located close to each other. When it is necessary to fix the annular blank for gear hobbing, the operator places the annular blank on the upper side of the three-jaw chuck 1. At this time, the mounting block 21 is located inside the annular blank. Then, the operator drives the three-jaw chuck 1 with a wrench to move the jaws 11 and the mounting block 21. The moving mounting block 21 clamps the inner wall of the annular blank. After the mounting block 21 clamps and fixes the annular blank, the operator turns the knob with a wrench to drive the positioning screw 23 to rotate, which causes the positioning block 22 to move towards the annular blank. The moving positioning block 22 presses the top of the annular blank. Under the coordinated pressing of the positioning block 22 and the mounting block 21, the annular blank remains stable during the gear hobbing process. After the annular blank is fixed, the electric slide table 31 drives the moving frame 32 and the three-jaw chuck 1 to move so that the annular blank is brought close to the gear hob. The gear hob performs gear hobbing on the annular blank. During this process, the output shaft of the servo motor 33 rotates and drives the three-jaw chuck 1 and the annular blank to rotate and perform all-round gear hobbing on the annular blank.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable positioning device for gear hobbing of a gear disc, comprising a three-jaw chuck (1), wherein a plurality of jaws (11) are slidably connected on the three-jaw chuck (1), and a driving mechanism (3) is provided at the bottom of the three-jaw chuck (1), the driving mechanism (3) being used to drive the three-jaw chuck (1) to move and rotate, characterized in that: The jaw (11) is provided with a positioning mechanism (2), which presses and fixes the top of the annular blank. The positioning mechanism (2) includes a mounting block (21) connected to the top of the jaw (11) by bolts. An adjustable extrusion assembly is provided on the upper side of the mounting block (21). When the three-jaw chuck (1) fixes the annular blank, one side of the mounting block (21) is in close contact with the inner wall of the annular blank, and the extrusion assembly applies a vertical downward force to the top of the annular blank.

2. The adjustable positioning device for gear hobbing of a gear disc according to claim 1, characterized in that: The extrusion assembly includes an L-shaped positioning block (22), which includes a vertical section and a horizontal section, and the positioning block (22) is located above the mounting block (21).

3. The adjustable positioning device for gear hobbing of a gear disc according to claim 2, characterized in that: The vertical section of the positioning block (22) is rotatably connected to a positioning screw (23), the lower end of which passes through the positioning block (22) and is threaded into the interior of the mounting block (21).

4. The adjustable positioning device for gear hobbing of a gear disc according to claim 3, characterized in that: The mounting block (21) has two positioning holes on its upper side, and two positioning rods (24) are fixedly connected to the lower side of the vertical section of the positioning block (22). The positioning rods (24) are slidably inserted into the positioning holes.

5. The adjustable positioning device for gear hobbing of a gear disc according to claim 4, characterized in that: The positioning rod (24) is arranged in parallel with the positioning screw (23). Under the constraint of the positioning rod (24), the positioning block (22) moves along the axial direction of the positioning rod (24).

6. The adjustable positioning device for gear hobbing of a gear disc according to claim 4, characterized in that: The vertical and horizontal sections of the positioning block (22) and the side of the mounting block (21) near the annular blank are fixedly connected with anti-slip rubber pads, which fill the gaps between the positioning block (22) and the mounting block (21) and the annular blank.

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