Clamping arm for machining

Abstract

This utility model relates to the field of machining technology and discloses a clamping arm for machining, including a connecting arm. A mounting shell is fixedly connected to the lower surface of the connecting arm. A bidirectional lead screw is rotatably connected inside the mounting shell. A protective shell is fixedly connected to the upper surface of the bidirectional lead screw. A stepper motor is fixedly installed inside the protective shell. Gears are fixedly connected to the output end of the stepper motor and the middle of the bidirectional lead screw. A clamping assembly is provided inside the mounting shell; the clamping assembly includes two connecting frames. This utility model uses a bidirectional lead screw to drive the connecting frames to move laterally. Its sealed installation structure effectively prevents dust. Combined with a push-pull rod to adjust the longitudinal position of the second clamping plate, the clamping distance can be flexibly adjusted according to the workpiece length, facilitating even force distribution and stable clamping. Finally, the connecting frame and the mounting rod are quickly connected via a plug and slot, and a positioning frame is inserted into a positioning slot to complete the locking, facilitating quick disassembly of the mounting rod when the clamping plate needs maintenance.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a clamping arm for machining. Background Technology

[0002] Machining refers to the process of altering the external dimensions, surface properties, or internal structure of a workpiece using mechanical equipment. It is a fundamental link in the manufacturing industry. Its core objective is to enable the workpiece to achieve the required precision, surface roughness, and mechanical properties through processes such as cutting, grinding, drilling, casting, and forging. The clamping arm used in machining is a key component in machining equipment, mainly used to fix the workpiece to ensure stability and precision during the machining process.

[0003] A search revealed that Chinese Patent CN219337766U discloses a clamping arm for machining. This invention addresses the shortcomings of existing clamping arms, such as inconvenience and instability in workpiece clamping, which reduces the overall practicality of the clamping arm. Furthermore, the inconvenience of adjusting the position of the clamping components diminishes the overall flexibility of the clamping arm during operation. By incorporating a clamping component, the invention facilitates stable and convenient workpiece clamping, thereby increasing the practicality of the clamping arm. Additionally, the adjustable device allows for easy adjustment of the position of the clamping component, further enhancing the flexibility of the clamping arm during operation.

[0004] While the aforementioned clamping arm facilitates the adjustment of the position of the clamping assembly, when using the clamping assembly, the bottom of the bidirectional threaded rod is exposed facing the surface of the workpiece being clamped. If the workpiece being clamped is dusty or dirty, dust can easily drift onto the bidirectional threaded rod, causing it to jam and become difficult to transmit power. Furthermore, in the prior art, the length of the clamping plate is fixed when clamping the workpiece, meaning that the workpiece can only be subjected to force at a single point. When clamping a long workpiece, this can easily lead to uneven force distribution after the workpiece is clamped, resulting in a decrease in clamping tightness. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a clamping arm for machining.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a clamping arm for machining, including a connecting arm, a mounting shell fixedly connected to the lower surface of the connecting arm, a bidirectional lead screw rotatably connected inside the mounting shell, a protective shell fixedly connected to the upper surface of the bidirectional lead screw, a stepper motor fixedly installed inside the protective shell, gears fixedly connected to the output end of the stepper motor and the middle part of the bidirectional lead screw, and a clamping assembly provided inside the mounting shell;

[0007] The clamping assembly includes two connecting frames, which are slidably connected inside the mounting housing. Guide grooves are provided on both sides of the inner wall of the mounting housing, and guide blocks are fixedly connected to both sides of the connecting frames.

[0008] As a further description of the above technical solution:

[0009] The two gears are meshed together, and the two guide blocks are slidably connected inside the guide groove. The connecting frame has a threaded groove inside, and the bidirectional lead screw is threadedly connected inside the two threaded grooves. An installation rod is fixedly connected to the lower surface of the connecting frame, and a first clamping plate is fixedly connected to one end of the installation rod.

[0010] As a further description of the above technical solution:

[0011] The first clamping plate has a limiting groove inside, and a limiting frame is slidably connected inside the limiting groove. A second clamping plate is fixedly connected to the lower surface of the limiting frame. Multiple rubber hemispheres are provided on one side of both the second clamping plate and the first clamping plate.

[0012] As a further description of the above technical solution:

[0013] The mounting rod has a mounting groove on its lower surface. A stepper motor is fixedly installed inside the mounting groove. A screw is fixedly connected to the output end of the stepper motor. A connecting block is threaded onto the outside of the screw. A push-pull rod is hinged to the lower surface of the connecting block. The push-pull rod is hinged to one side of the second clamping plate.

[0014] As a further description of the above technical solution:

[0015] The upper surface of the mounting rod is provided with a disassembly assembly, which includes a plug block. The plug block is fixedly connected to the upper surface of the mounting rod, and a locking groove is provided inside the plug block.

[0016] As a further description of the above technical solution:

[0017] The connecting frame has a slot inside, and through slots are provided on both sides of the slot. Insert rods are provided inside the two through slots and the locking slot. The insert rods have a positioning slot and a threaded hole inside, and the threaded hole is located on one side of the positioning slot.

[0018] As a further description of the above technical solution:

[0019] The threaded hole is internally threaded with a bolt, and the bolt is externally rotatably connected to a positioning bracket, which is slidably connected inside the positioning groove.

[0020] This utility model has the following beneficial effects:

[0021] 1. This utility model utilizes a clamping assembly with a bidirectional lead screw installed inside the mounting housing. Both ends of the bidirectional lead screw are protected by a connecting frame, allowing the bidirectional lead screw to be installed in a relatively enclosed space. The threaded groove facilitates the lateral movement of the connecting frame, reducing the possibility of transmission jamming caused by dust contamination of the bidirectional lead screw. Simultaneously, the push-pull rod pushes the second clamping plate longitudinally, allowing the distance between the second clamping plate and the first clamping plate to be adjusted according to the longitudinal length of the workpiece to be clamped. This improves the uniformity of force on the workpiece after clamping, thereby enhancing the clamping tightness.

[0022] 2. This utility model, through the design of the disassembly and assembly components, uses the insert block and slot to facilitate the connection of the connecting frame and the mounting rod, and then uses the positioning frame to insert into the positioning slot to facilitate locking the insert rod. This helps to remove the mounting rod from the clamping assembly when the first clamping plate and the second clamping plate need maintenance, thereby improving the convenience of clamping plate maintenance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the protective shell proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the mounting shell proposed in this utility model;

[0026] Figure 4 This is a schematic cross-sectional view of the connecting frame structure proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the first clamping plate proposed in this utility model;

[0028] Figure 6 This is a schematic diagram of the cross-sectional structure of the mounting rod proposed in this utility model;

[0029] Figure 7 This is a schematic diagram of the limiting frame structure proposed in this utility model;

[0030] Figure 8 This is a schematic diagram of the insertion rod structure proposed in this utility model;

[0031] Figure 9 This is a schematic diagram of the positioning frame structure proposed in this utility model.

[0032] Legend:

[0033] 1. Connecting arm; 2. Mounting housing; 3. Two-way lead screw; 4. Protective housing; 5. Stepper motor; 6. Gear; 7. Guide groove; 8. Connecting frame; 9. Guide block; 10. Threaded groove; 11. Mounting rod; 12. First clamping plate; 13. Limiting groove; 14. Limiting frame; 15. Second clamping plate; 16. Screw; 17. Stepper motor; 18. Connecting block; 19. Push-pull rod; 20. Rubber hemisphere; 21. Insert block; 22. Locking groove; 23. Slot; 24. Through groove; 25. Insert rod; 26. Positioning groove; 27. Threaded hole; 28. Bolt; 29. ​​Positioning frame. Detailed Implementation

[0034] 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.

[0035] As attached Figure 1-9 As shown, one embodiment of this utility model provides a clamping arm for machining, including a connecting arm 1, a mounting shell 2 fixedly connected to the lower surface of the connecting arm 1, a bidirectional lead screw 3 rotatably connected inside the mounting shell 2, and threads in opposite directions on the outside, a protective shell 4 fixedly connected to the upper surface of the bidirectional lead screw 3, a stepper motor 5 fixedly installed inside the protective shell 4, and gears 6 fixedly connected to the output end of the stepper motor 5 and the middle part of the bidirectional lead screw 3, and a clamping assembly is provided inside the mounting shell 2;

[0036] The clamping assembly includes two connecting frames 8, which are slidably connected inside the mounting shell 2. Guide grooves 7 are provided on both sides of the inner wall of the mounting shell 2. Guide blocks 9 are fixedly connected to both sides of the connecting frames 8. The guide grooves 7 limit the guide blocks 9.

[0037] As attached Figure 4 As shown, the two gears 6 are meshed together, and the two guide blocks 9 are slidably connected inside the guide groove 7. The connecting frame 8 has a threaded groove 10 inside, which matches the external thread of the bidirectional lead screw 3. The bidirectional lead screw 3 is threadedly connected inside the two threaded grooves 10, which facilitates the movement of the connecting frame 8.

[0038] As attached Figure 6 As shown, a mounting rod 11 is fixedly connected to the lower surface of the connecting frame 8, and a first clamping plate 12 is fixedly connected to one end of the mounting rod 11 to facilitate clamping the workpiece at one point.

[0039] As attached Figure 5As shown, a limiting groove 13 is provided inside the first clamping plate 12 to facilitate the sliding of the limiting frame 14, and there is a stop at the bottom of the limiting groove 13 to facilitate the sliding limitation of the limiting frame 14.

[0040] As attached Figure 6 As shown, a limiting frame 14 is slidably connected inside the limiting groove 13. A second clamping plate 15 is fixedly connected to the lower surface of the limiting frame 14. After the distance between the limiting frame 14 and the first clamping plate 12 is increased, the first clamping plate 12 and the second clamping plate 15 can easily clamp the two points of the workpiece being clamped, improving the clamping uniformity. Multiple rubber hemispheres 20 are provided on one side of both the second clamping plate 15 and the first clamping plate 12 to enhance the anti-slip ability. An installation groove is opened on the lower surface of the mounting rod 11. A stepper motor 17 is fixedly installed inside the installation groove. A screw 16 is fixedly connected to the output end of the stepper motor 17. The screw 16 is rotatably connected inside the installation groove. A connecting block 18 is threaded to the outside of the screw 16. A push-pull rod 19 is hinged to the lower surface of the connecting block 18. The push-pull rod 19 is hinged to one side of the second clamping plate 15, which facilitates pushing or pulling the second clamping plate 15 according to the movement of the connecting block 18.

[0041] As attached Figure 6 As shown, the upper surface of the mounting rod 11 is provided with a disassembly and assembly assembly, which includes a plug 21. The plug 21 is fixedly connected to the upper surface of the mounting rod 11, and a locking groove 22 is provided inside the plug 21 for the insertion of the plug rod 25.

[0042] As attached Figure 4 As shown, the connector 8 has a slot 23 inside for installing the plug 21. Both sides of the slot 23 have through slots 24 to facilitate the insertion of the plug rod 25.

[0043] As attached Figure 8 As shown, the two through slots 24 and the locking slot 22 are provided with insert rods 25 to facilitate the limiting and locking of the insert block 21. The insert rods 25 are provided with positioning slots 26 and threaded holes 27. The threaded holes 27 are located on one side of the positioning slots 26. The positioning slots 26 are used to install the positioning brackets 29. The positioning brackets 29 are first inserted into the positioning slots 26, and then the bolts 28 are screwed into the threaded holes 27 to fix the positioning brackets 29.

[0044] As attached Figure 9 As shown, a bolt 28 is threaded inside the threaded hole 27, and a positioning frame 29 is rotatably connected to the outside of the bolt 28. The positioning frame 29 is slidably connected inside the positioning groove 26. The bolt 28 is used to fix the positioning frame 29, and the positioning frame 29 facilitates the limiting of the insertion rod 25.

[0045] Working principle: First, the connecting arm 1 is installed on the machine that needs to clamp the workpiece. When clamping the workpiece, the distance between the first clamping plate 12 and the second clamping plate 15 is adjusted according to the length of the workpiece. The stepper motor 17 is activated by the controller, causing the output end of the stepper motor 17 to rotate, which in turn drives the screw 16 to rotate. This causes the connecting block 18 to move laterally outside the screw 16, which in turn causes the push-pull rod 19 to rotate longitudinally. The push-pull rod 19 pushes the second clamping plate 15 downward, and the second clamping plate 15 causes the limiting frame 14 to slide inside the limiting groove 13, thus limiting the second clamping plate 15. Position the second clamping plate 15 so that the distance between the second clamping plate 15 and the first clamping plate 12 is increased. After adjustment, turn off the stepper motor 17. Then, when the workpiece is between the two clamping plates, start the stepper motor 5 so that its output end drives the corresponding gear 6 to rotate. When the other gear 6 rotates, it will drive the bidirectional lead screw 3 to rotate. Then, under the action of the threaded groove 10, it will push the two connecting frames 8 to slide inside the mounting shell 2. At this time, the guide block 9 will slide inside the guide groove 7. With the connection of the connecting frame 8 and the mounting rod 11, the first clamping plate 12 and the second clamping plate 15 on both sides will move closer to each other and clamp and fix the workpiece.

[0046] When the mounting rod 11 is disassembled to inspect the upper structure, the bolt 28 is rotated so that the bolt 28 gradually disengages from the threaded hole 27. As the bolt 28 moves upward, it drives the positioning frame 29 to slide upward inside the positioning groove 26, thereby causing the positioning frame 29 to disengage from the inside of the insert rod 25. The insert rod 25 is released from its limit, and then the insert rod 25 is slid out from the inside of the locking groove 22 and the two slots 23, so that the slots 23 and the insert block 21 are released from their limit. Then the insert block 21 is slid out from the inside of the slot 23, thereby disassembling the connecting frame 8.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping arm for machining, comprising a connecting arm (1), characterized in that: The lower surface of the connecting arm (1) is fixedly connected to a mounting shell (2), and a bidirectional lead screw (3) is rotatably connected inside the mounting shell (2). A protective shell (4) is fixedly connected to the upper surface of the bidirectional lead screw (3). A stepper motor (5) is fixedly installed inside the protective shell (4). Gears (6) are fixedly connected to the output end of the stepper motor (5) and the middle part of the bidirectional lead screw (3). A clamping assembly is provided inside the mounting shell (2). The clamping assembly includes two connecting frames (8), which are slidably connected inside the mounting shell (2). Guide grooves (7) are provided on both sides of the inner wall of the mounting shell (2), and guide blocks (9) are fixedly connected to both sides of the connecting frames (8).

2. The clamping arm for machining according to claim 1, characterized in that: The two gears (6) are meshed together, and the two guide blocks (9) are slidably connected inside the guide groove (7). The connecting frame (8) has a threaded groove (10) inside. The bidirectional lead screw (3) is threadedly connected inside the two threaded grooves (10). The lower surface of the connecting frame (8) is fixedly connected to an installation rod (11), and one end of the installation rod (11) is fixedly connected to a first clamping plate (12).

3. The clamping arm for machining according to claim 2, characterized in that: The first clamping plate (12) has a limiting groove (13) inside, and a limiting frame (14) is slidably connected inside the limiting groove (13). A second clamping plate (15) is fixedly connected to the lower surface of the limiting frame (14). A plurality of rubber hemispheres (20) are provided on one side of both the second clamping plate (15) and the first clamping plate (12).

4. The clamping arm for machining according to claim 2, characterized in that: The mounting rod (11) has a mounting groove on its lower surface. A stepper motor (17) is fixedly installed inside the mounting groove. A screw (16) is fixedly connected to the output end of the stepper motor (17). A connecting block (18) is threaded onto the outside of the screw (16). A push-pull rod (19) is hinged to the lower surface of the connecting block (18). The push-pull rod (19) is hinged to one side of the second clamping plate (15).

5. The clamping arm for machining according to claim 2, characterized in that: The upper surface of the mounting rod (11) is provided with a disassembly assembly, which includes a plug (21). The plug (21) is fixedly connected to the upper surface of the mounting rod (11), and a locking groove (22) is provided inside the plug (21).

6. The clamping arm for machining according to claim 1, characterized in that: The connecting frame (8) has a slot (23) inside, and through slots (24) are provided on both sides of the slot (23). Insert rods (25) are provided inside the two through slots (24) and the locking slot (22). The insert rods (25) have a positioning slot (26) and a threaded hole (27) inside. The threaded hole (27) is located on one side of the positioning slot (26).

7. The machining clamping arm according to claim 6, characterized in that: The threaded hole (27) is internally threaded with a bolt (28), and the bolt (28) is externally rotatably connected with a positioning bracket (29), which is slidably connected inside the positioning groove (26).

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