Positioning tool for gear machining table

Abstract

The utility model relates to the technical field of positioning tools, in particular to a gear machining table positioning tool which comprises a bearing plate, a plurality of movable clamping pieces are oppositely arranged on the bearing plate, the clamping pieces move relatively to be used for fixing an annular gear blank, a driving piece is further arranged at the bottom end of the bearing plate, and the driving piece is used for driving the clamping pieces to move relatively. The clamping piece comprises a movable moving block, a liftable and rotatable extension plate is arranged on the moving block, a liftable pressing block is arranged on the extension plate, a buffer pad is arranged on the side wall, away from the extension plate, of the pressing block, and the extension plate rotates to enable the buffer pad to face the annular gear blank. Through the rotatable arrangement of the extension plate, the orientation of the pressing block and the buffer pad located on the extension plate can be changed, when the extension plate needs to make contact with the inner side wall or the outer side wall of the annular gear blank, adjustment can be conducted according to specific requirements, and therefore the buffer pad can make better contact with the annular gear blank.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, specifically to a positioning tooling for a gear processing table. Background Technology

[0002] A gear is a ring-shaped mechanical component with teeth on its rim, capable of continuous meshing to transmit motion and power. During gear machining, fixtures are needed to maintain the stable position of the ring-shaped gear blank. Current gear machining processes require selecting appropriate positioning fixtures based on the different structural forms of external and internal gears. When fixing internal gears, multiple fixtures are typically used to press against the outer wall of the internal gear, while when fixing external gears, multiple fixtures are used to press against the inner wall of the external gear, moving away from each other. To prevent wear caused by compression between the fixture and the ring-shaped gear blank, ring-shaped buffer pads are usually fixed to the fixture. However, when fixing the ring-shaped gear blank, only a portion of the buffer pad can contact the outer or inner wall of the ring-shaped gear blank, resulting in a limited buffering effect, which needs improvement. Summary of the Invention

[0003] The purpose of this utility model is to provide a positioning fixture for a gear processing table to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A gear processing table positioning fixture includes a support plate with multiple movable clamping members arranged opposite each other on the support plate. The relative movement of the clamping members is used to fix an annular gear blank. The bottom end of the support plate is also provided with a driving member for driving the multiple clamping members to move relative to each other. Each clamping member includes a movable moving block, and the moving block is provided with a liftable and rotatable extension plate. The extension plate is provided with a liftable pressure block, and the side wall of the pressure block away from the extension plate is provided with a removable buffer pad. The extension plate rotates to change the orientation of the buffer pad.

[0006] Preferably, the movable block has a lifting cavity with one end open. The opening of the lifting cavity is connected to a top cover by screws. The end face of the top cover facing the lifting cavity has a first slot and a second slot. The lifting cavity has a movable disc that slides against its inner wall. The movable disc can be raised, lowered, and rotated within the lifting cavity. The movable disc has a locking block that can extend into the first slot or the second slot. The locking block is located in the first slot or the second slot to adjust the orientation of the extension plate.

[0007] Preferably, the movable disk is provided with an extension column extending out of the lifting cavity, and the extension column is provided with countersunk screws for connecting with the extension plate.

[0008] Preferably, the bottom of the lifting cavity is provided with a spring for pushing the moving disk upward.

[0009] Preferably, the extension plate is L-shaped, and a sliding groove is provided on the other side wall of the extension plate along its height direction. The pressure block is provided with a threaded post that moves within the sliding groove, and a nut is threadedly connected to the threaded post. The nut is used to fix the threaded post in its current position.

[0010] Preferably, the bottom end of the support plate is provided with multiple limiting frames, each containing a limiting cavity. The support plate is provided with multiple limiting grooves that connect to the limiting cavities. A rotatable lead screw is provided inside the limiting cavity. The moving block is slidably fitted against the side wall of the limiting cavity. The lead screw is threaded through the moving block, and the rotation of the lead screw is used to drive the moving block to move along the axial direction of the lead screw.

[0011] Preferably, the bottom end of the support plate is provided with a drive housing, the drive housing is provided with a drive cavity, one end of the lead screw extends into the drive cavity, the drive housing is provided with a rotatable rotating shaft, the rotating shaft is provided with a first bevel gear, the end of the lead screw is provided with a second bevel gear, and the first bevel gear and the second bevel gear are meshed.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through the rotatable setting of the extension plate, allows the orientation of the pressure block and buffer pad located on it to be changed. When it is necessary to contact the inner or outer side wall of the annular tooth blank, it can be adjusted according to specific needs, so that the buffer pad can contact the annular tooth blank better.

[0014] This invention features a pressure block that is positioned on an extension plate and can be raised and lowered. The pressure block is L-shaped, and one end of the pressure block can abut against the upper surface of the annular tooth blank, thereby enabling the pressure block to better fix the annular tooth blank and thus enhancing its usability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning fixture for a gear processing table in this utility model.

[0016] Figure 2 This is a schematic diagram of the support plate and movable block structure in this utility model.

[0017] Figure 3 This is a schematic diagram of the support plate and legs in this utility model.

[0018] Figure 4 This is a partial cross-sectional schematic diagram of the support plate and the movable block in this utility model.

[0019] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0020] Figure 6This is an exploded view of the movable block, extension plate, and pressure block in this utility model.

[0021] Figure 7 This is a cross-sectional schematic diagram of the movable block and movable disk in this utility model.

[0022] Figure 8 This is a schematic diagram of the top cover in this utility model.

[0023] Figure 9 This is a schematic diagram of the structure of the movable disk, the card block, and the extension column in this utility model.

[0024] Figure 10 This is a schematic diagram of the structure of the movable block, the extension plate, and the pressure block in this utility model.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 100. Support plate; 101. Support leg; 102. Limiting groove; 103. Limiting frame; 110. Annular toothed blank;

[0027] 200. Move block;

[0028] 301. Lead screw; 310. Drive housing; 311. Cover plate; 312. Motor;

[0029] 400. Second bevel gear; 410. First bevel gear;

[0030] 600. Top cover; 610. Extension plate; 611. Sliding groove; 612. Countersunk screw; 620. Pressure block; 621. Buffer pad; 622. Threaded post; 623. Nut;

[0031] 700. Lifting chamber; 710. Spring; 720. Moving plate; 721. Extension column;

[0032] 800, First card slot; 801, Second card slot;

[0033] 900, Card Block. Detailed Implementation

[0034] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0035] The following is in conjunction with the appendix Figures 1-10 This embodiment will be described in further detail.

[0036] Please see Figures 1-7A gear processing table positioning fixture in this embodiment includes a support plate 100. Multiple movable clamping members are provided on the support plate 100. The relative movement of the clamping members is used to fix the annular gear blank 110. A driving member is also provided at the bottom end of the support plate 100. The driving member is used to drive the multiple clamping members to move relative to each other.

[0037] The clamping component includes a movable moving block 200, on which an extension plate 610 is provided that can be raised, lowered and rotated, and on which a pressing block 620 is provided that can be raised, lowered, and on the side wall of the pressing block 620 away from the extension plate 610, a removable buffer pad 621 is provided, and the extension plate 610 can be rotated to change the orientation of the buffer pad 621.

[0038] In this embodiment, multiple support legs 101 are fixedly connected to the bottom end face of the support plate 100. Specifically, the support legs 101 are installed on the operating table of the machine tool (not shown in the figure) by screws. The operating table is provided with a rotatable turntable. The turntable can rotate slowly, thereby driving the annular gear blank 110 to rotate. The machine tool is provided with a cutting assembly (not shown in the figure) for cutting the annular gear blank 110. The cutting assembly includes a reciprocating lifting arm. The lifting arm is provided with a cutting blade. The lifting arm drives the cutting blade to reciprocate up and down, which can cut the edge of the annular gear blank 110. The rotation of the turntable causes different positions of the annular gear blank 110 to contact the cutting blade, and finally the annular gear blank 110 is processed into a gear.

[0039] Specifically, during the process of machining the annular gear blank 110 into a gear, if it is to be machined into an internal gear, firstly, multiple moving blocks 200 are moved away from the center of the support plate 100, and the annular gear blank 110 is placed at the center of the upper end face of the support plate 100. Then, the extension plate 610 is rotated to adjust the buffer pad 621 on it towards the outer wall of the annular gear blank 110. Then, multiple moving blocks 200 are moved closer to the center of the support plate 100, thereby driving the extension plate 610 to move closer to each other, so that the buffer pad 621 abuts against the outer wall of the annular gear blank 110 to fix the annular gear blank 110. At this time, the cutting is started. The cutting assembly cuts the inner wall of the annular gear blank 110. If it is to be machined into an external gear, the multiple moving blocks 200 are first brought closer to each other, and the annular gear blank 110 is placed at the center of the upper end face of the support plate 100 so that the multiple moving blocks 200 are located inside the annular gear blank 110. Then, the extension plate 610 is rotated to adjust the buffer pad 621 on it to face the inner wall of the annular gear blank 110. Then, the multiple moving blocks 200 are moved away from each other so that the buffer pad 621 abuts against the inner wall of the annular gear blank 110 to fix the annular gear blank 110. At this time, the cutting assembly is started to cut the outer wall of the annular gear blank 110.

[0040] The driving component is designed to drive multiple clamping components to move relative to each other. During the process of fixing the annular tooth blank 110, it is not necessary to move the individual clamping components one by one; only the driving component needs to be operated.

[0041] The rotatable extension plate 610 allows the orientation of the pressure block 620 and the buffer pad 621 located on it to be changed. When it is necessary to contact the inner or outer side wall of the annular tooth blank 110, it can be adjusted according to specific needs, so that the buffer pad 621 can contact the annular tooth blank 110 better.

[0042] The pressure block 620 is L-shaped. Therefore, by the lifting and lowering arrangement of the pressure block 620 on the extension plate 610, one end of the pressure block 620 can abut against the upper end face of the annular tooth blank 110, thereby enabling the pressure block 620 to better fix the annular tooth blank 110, so that the clamping member can fix the annular tooth blank 110 more stably, so that the cutting assembly can cut the annular tooth blank 110.

[0043] Combination Figures 2-10 As shown, in this embodiment, the movable block 200 is provided with a lifting cavity 700 with one end open. The opening of the lifting cavity 700 is connected to a top cover 600 by screws. The end face of the top cover 600 facing the inside of the lifting cavity 700 is provided with a first slot 800 and a second slot 801. The lifting cavity 700 is provided with a movable disk 720 that slides and fits against its inner wall. The movable disk 720 can be positioned to move up and down and rotate within the lifting cavity 700. The movable disk 720 is provided with a locking block 900 that can extend into the first slot 800 or the second slot 801. The locking block 900 is fixedly connected to the movable disk 720. The locking block 900 is located in the first slot 800 or the second slot 801 and is used to adjust the orientation of the extension plate 610.

[0044] In this embodiment, an extension post 721 extending through the top cover 600 is fixedly connected to the movable disk 720. The extension plate 610 is L-shaped, and one side wall is connected to the protruding end of the extension post 721 by a countersunk screw 612. The pressure block 620 is installed on the other side wall of the extension plate 610. The bottom wall of the lifting cavity 700 is provided with a spring 710 for pushing the movable disk 720 upward. Specifically, one end of the spring 710 abuts against the bottom wall of the lifting cavity 700, and the other end abuts against the bottom surface of the movable disk 720. Thus, under the elastic force of the spring 710, the movable disk 720 will move upward. When the locking block 900 is engaged... When the extension plate 610 is in the first slot 800, it is oriented closer to the center of the support plate 100 and can be maintained in this state. When it is necessary to adjust the orientation of the extension plate 610, the extension plate 610 can be moved down to drive the moving disk 720 down, so that the locking block 900 is disengaged from the first slot 800. At this time, the extension plate 610 is rotated so that it is oriented away from the center of the support plate 100. Under the elastic force of the spring 710, the moving disk 720 is moved up, so that the locking block 900 is locked into the second slot 801. At this time, the extension plate 610 can be kept away from the center of the support plate 100, thereby completing the orientation adjustment of the buffer pad 621.

[0045] Combination Figures 6-9 As shown, in this embodiment, the extension plate 610 is L-shaped, and a sliding groove 611 is provided on the other side wall of the extension plate 610 along its height direction. The pressure block 620 is provided with a threaded post 622 that moves within the sliding groove 611. A nut 623 is threadedly connected to the threaded post 622, and the nut 623 is used to fix the threaded post 622 in the current position.

[0046] In this embodiment, the pressure block 620 is also L-shaped. At the same time, the bent part of the pressure block 620 and the buffer pad 621 are on the same side. This allows the bent part of the pressure block 620 to contact the upper end face of the annular tooth blank 110 when the pressure block 620 moves down, thus better fixing the annular tooth blank 110. When it is necessary to fix the annular tooth blank 110 of different thicknesses, the nut 623 can be loosened, and then the threaded column 622 can be slid in the sliding groove 611 to adjust the distance between the bent part of the pressure block 620 and the upper surface of the support plate 100, thereby adapting to the annular tooth blank 110 of different thicknesses. Finally, the nut 623 is tightened so that it contacts the side wall of the extension plate 610, so that the pressure block 620 is kept at the current height.

[0047] In order to prevent the pressure block 620 from rotating when sliding along the sliding groove 611, two threaded columns 622 are provided on the pressure block 620, and both pressure blocks 620 slide in contact with the sliding groove 611.

[0048] It should be noted that after the orientation of the extension plate 610 is adjusted, the pressure block 620 can be moved down so that its bottom end contacts the upper end face of the annular tooth blank 110. At this time, the extension plate 610 is restricted by the pressure block 620 and cannot move downward. Under the elastic force of the spring 710, the locking block 900 is locked into the second locking groove 801 or the first locking groove 800, and the extension plate 610 cannot move upward, so that the extension plate 610 is fixed.

[0049] The size of one side wall of the extension plate 610 is adapted to the size of the top of the moving block 200. The buffer pad 621 is fixedly connected to the side wall of the pressure block 620 away from the extension plate 610. Thus, when the moving block 200 approaches the annular tooth blank 110, the buffer pad 621 will contact the annular tooth blank 110, while the moving block 200 will not contact the annular tooth blank 110.

[0050] Combination Figures 1-4 As shown, in this embodiment, a plurality of limiting frames 103 are fixedly connected to the bottom end of the support plate 100. The limiting frame 103 is provided with a limiting cavity. The support plate 100 is provided with a plurality of limiting grooves 102 communicating with the limiting cavity. A rotatable lead screw 301 is provided in the limiting cavity. The lead screw 301 is rotatably connected to the limiting frame 103 through a bearing. The moving block 200 is slidably fitted with the side wall of the limiting cavity. The lead screw 301 is threaded through the moving block 200. The rotation of the lead screw 301 is used to drive the moving block 200 to move along the axial direction of the lead screw 301.

[0051] In this embodiment, multiple limiting frames 103 are arranged perpendicularly to each other on the bottom surface of the support plate 100. Since the moving block 200 is restricted by the limiting cavity and the screw 301 is threaded through the moving block 200, when the screw 301 rotates, the moving block 200 will move along the axial direction of the screw 301, thereby driving the extension plate 610, the pressure block 620 and the buffer pad 621 to move accordingly, so that the buffer pad 621 contacts the inner or outer side wall of the annular tooth blank 110.

[0052] Combination Figures 1-5 As shown, in this embodiment, a drive housing 310 is fixedly connected to the bottom end of the support plate 100. The drive housing 310 has a drive cavity. One end of the lead screw 301 extends into the drive cavity. A rotatable rotating shaft is provided inside the drive housing 310. A cover plate 311 is bolted to the opening of the drive cavity. The rotating shaft is rotatably connected to the cover plate 311 through a bearing. A first bevel gear 410 is fixedly connected to the rotating shaft. A second bevel gear 400 is provided at the end of the lead screw 301. The first bevel gear 410 and the second bevel gear 400 are meshed together.

[0053] In this embodiment, a motor 312 is fixedly connected to the cover plate 311 by bolts. The output end of the motor 312 is fixedly connected to a rotating shaft. When the motor 312 starts, the rotating shaft rotates, which drives the first bevel gear 410 to rotate, thereby causing multiple second bevel gears 400 to rotate, and finally causing multiple lead screws 301 to rotate, driving multiple moving blocks 200 to move towards or away from the center position of the support plate 100. The motor 312 has a self-locking function, that is, when the motor 312 stops, the rotating shaft will not rotate, thereby allowing the moving blocks 200 to remain in their current position.

[0054] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A positioning fixture for a gear processing table, comprising a support plate (100), on which a plurality of movable clamping members are disposed opposite each other, the clamping members being movable relative to each other for fixing an annular gear blank (110), characterized in that: The bottom end of the support plate (100) is also provided with a driving component, which is used to drive multiple clamping components to move relative to each other. The clamping components include a movable moving block (200), which is provided with a liftable and rotatable extension plate (610). The extension plate (610) is provided with a liftable pressure block (620). The side wall of the pressure block (620) away from the extension plate (610) is provided with a removable buffer pad (621). The extension plate (610) rotates to change the orientation of the buffer pad (621).

2. The gear machining table positioning fixture according to claim 1, characterized in that: The movable block (200) is provided with a lifting cavity (700) with one end open. The opening of the lifting cavity (700) is connected to a top cover (600) by screws. The top cover (600) has a first slot (800) and a second slot (801) facing each other on one end face of the lifting cavity (700). The lifting cavity (700) is provided with a movable disk (720) that slides against its inner wall. The movable disk (720) can be raised, lowered and rotated in the lifting cavity (700). The movable disk (720) is provided with a locking block (900) that can be inserted into the first slot (800) or the second slot (801). The locking block (900) is located in the first slot (800) or the second slot (801) to adjust the orientation of the extension plate (610).

3. The gear machining table positioning fixture according to claim 2, characterized in that: The movable disk (720) is provided with an extension column (721) extending out of the lifting cavity (700), and the extension column (721) is provided with countersunk screws (612) for connecting with the extension plate (610).

4. The gear machining table positioning fixture according to claim 3, characterized in that: The bottom end of the lifting chamber (700) is provided with a spring (710) for pushing the movable disk (720) upward.

5. A gear machining table positioning fixture according to claim 4, characterized in that: The extension plate (610) is L-shaped. A sliding groove (611) is provided on the other side wall of the extension plate (610) along its height direction. A threaded post (622) is provided on the pressure block (620) and moves within the sliding groove (611). A nut (623) is threaded onto the threaded post (622) and the nut (623) is used to fix the threaded post (622) in the current position.

6. The gear machining table positioning fixture according to claim 1, characterized in that: The bottom end of the support plate (100) is provided with multiple limiting frames (103), and the limiting frames (103) are provided with limiting cavities. The support plate (100) is provided with multiple limiting grooves (102) that connect to the limiting cavities. The limiting cavity is provided with a rotatable lead screw (301). The moving block (200) is slidably fitted to the side wall of the limiting cavity. The lead screw (301) is threaded through the moving block (200). The rotation of the lead screw (301) is used to drive the moving block (200) to move along the axial direction of the lead screw (301).

7. A gear machining table positioning fixture according to claim 6, characterized in that: The bottom end of the support plate (100) is provided with a drive housing (310), and the drive housing (310) is provided with a drive cavity. One end of the lead screw (301) extends into the drive cavity. The drive housing (310) is provided with a rotatable rotating shaft. The rotating shaft is provided with a first bevel gear (410). The end of the lead screw (301) is provided with a second bevel gear (400). The first bevel gear (410) and the second bevel gear (400) are meshed.

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