A positioning jig of an automatic assembly machine

Abstract

This utility model relates to the field of fixture technology, specifically a positioning fixture for an automatic assembly machine. It includes a support platform and a worktable. Multiple positioning seats are fixedly mounted on the worktable, each with a placement slot for placing workpieces. An inner cavity is formed inside the positioning seat, and an electric telescopic rod is fixed within the cavity. The output end of the electric telescopic rod is connected to a movable connecting plate, and a support frame is fixedly connected to the movable connecting plate. The support frame can extend and retract from the inner cavity into the placement slot. With the clamping assembly and support frame, the support frame initially extends into the placement slot, providing stable support for the workpiece. When the support frame retracts into the inner cavity, the workpiece falls to the bottom of the placement slot. Combined with the clamping and fixing by the clamping plate, this ensures the positional accuracy of the workpiece during assembly, reducing assembly errors caused by workpiece movement. Furthermore, after assembly, the support frame moves upward as the electric telescopic rod extends, lifting the assembled workpiece from the placement slot.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically a positioning fixture for an automatic assembly machine. Background Technology

[0002] In the production process of automated assembly machines, positioning fixtures are core components that ensure the assembly accuracy of workpieces, and stable clamping of the workpieces is a crucial aspect of their effectiveness. Currently, some existing technologies employ simple groove structures for workpiece positioning, simply placing the workpiece within an open placement groove and relying on the side walls of the groove to restrict its lateral movement. However, due to the lack of a dedicated clamping mechanism, the workpiece is prone to loosening or shifting within the placement groove due to equipment vibration, assembly forces, and other factors, making it difficult to meet the stability requirements of high-precision assembly. Furthermore, placing the workpiece directly at the bottom of the groove requires manual or additional equipment to reach into the groove for retrieval, which is not only inconvenient but may also damage the workpiece surface due to bumps during retrieval, affecting product quality. Therefore, this invention proposes a positioning fixture for an automated assembly machine to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning fixture for an automatic assembly machine, so as to achieve stable clamping of the workpiece in the placement slot, prevent it from loosening or shifting during the assembly process, and facilitate the easy removal of the workpiece from the placement slot after assembly, avoiding damage to the workpiece during the removal process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for an automatic assembly machine, comprising a support platform and a worktable, wherein a plurality of positioning seats are fixedly arranged on the worktable, and the positioning seats are provided with placement slots for placing workpieces; The positioning seat has an inner cavity, and an electric telescopic rod is fixed inside the inner cavity. The output end of the electric telescopic rod is connected to a movable connecting plate, and a support frame is fixedly connected to the movable connecting plate. The support frame can extend and retract from the inner cavity to the placement slot. The positioning seat is equipped with a clamping assembly for clamping the workpiece. The clamping assembly can clamp or release the workpiece in the placement slot during the movement of the moving connecting plate driven by the electric telescopic rod.

[0005] Preferably, a fixed support plate is fixed inside the inner cavity, and a first spring is fixedly connected between the fixed support plate and the L-shaped connecting plate. The L-shaped connecting plate can be pushed when the moving connecting plate moves downward, and can be reset by the first spring when the moving connecting plate moves upward.

[0006] Preferably, the clamping assembly includes a movable cavity formed in the positioning seat, a movable inclined block is slidably disposed in the movable cavity, a connecting plate is also disposed in the movable cavity, a rolling column is rotatably connected to one end of the connecting plate, and a sliding rod is fixedly connected to the other end of the connecting plate.

[0007] Preferably, one end of the sliding rod slides into the placement groove and is fixedly connected to a clamping plate, and the end of the L-shaped connecting plate away from the first spring cooperates with the moving inclined block.

[0008] Preferably, a T-shaped sliding plate is fixed to one end of the movable inclined block, and a matching groove is provided in the positioning seat for the T-shaped sliding plate to slide, and the T-shaped sliding plate slides in conjunction with the matching groove.

[0009] Preferably, the outer surface of the rolling column is in close contact with the inclined surface of the moving inclined block, and the rolling column can roll as the moving inclined block moves.

[0010] Preferably, a second spring is sleeved on the sliding rod, with one end of the second spring abutting against the connecting plate and the other end abutting against the inner wall of the moving cavity.

[0011] Preferably, the plurality of positioning seats are evenly distributed along the circumference of the working disc, and the working disc is rotatably mounted on the support platform.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Equipped with clamping components and a support frame, the support frame extends into the placement slot in the initial state, providing stable support for the workpiece and facilitating quick and accurate placement by the operator. When the support frame retracts into its inner cavity, the workpiece rests at the bottom of the placement slot, and is secured by the clamping plates, ensuring the positional accuracy of the workpiece during assembly and reducing assembly errors caused by workpiece movement. Furthermore, after assembly, this support frame moves upward with the extension of the electric telescopic rod, lifting the assembled workpiece from the placement slot, avoiding the inconvenience of manually reaching into the slot to retrieve the workpiece and reducing the risk of damage to the workpiece surface from impacts. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the placement groove structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the support frame structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the internal cavity structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the clamping component structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the movable connecting plate structure of this utility model.

[0019] In the diagram: 1. Support platform; 2. Working plate; 3. Positioning seat; 4. Workpiece; 5. Placement slot; 6. Clamping assembly; 7. Support frame; 8. Electric telescopic rod; 9. Moving connecting plate; 10. Fixed support plate; 11. First spring; 12. L-shaped connecting plate; 13. Inner cavity; 61. Clamping plate; 62. Sliding rod; 63. Second spring; 64. Connecting plate; 65. Rolling column; 66. Moving inclined block; 67. T-shaped sliding plate; 68. Matching slide groove; 69. Moving cavity. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0021] Please see Figures 1 to 6 This utility model provides a technical solution: a positioning fixture for an automatic assembly machine, wherein a support platform 1 serves as the basic support component of the entire device, and a working disc 2 is rotatably connected to the top of the support platform 1 via a rotating shaft and is driven by a driving device in the prior art, such as a motor, to achieve stable rotation of the working disc 2 on the support platform 1. Multiple positioning seats 3 are evenly distributed along the circumference of the working disc 2 and are fixed to the upper surface of the working disc 2 by bolts to ensure that the positioning seats 3 rotate synchronously with the working disc 2.

[0022] The positioning seat 3 has a placement slot 5 for placing the workpiece 4. The size of the placement slot 5 is designed to fit the shape of the workpiece 4. The positioning seat 3 has an inner cavity 13. The inner cavity 13 and the placement slot 5 are connected through an opening at the bottom. The opening allows the support frame 7 to pass through. The electric telescopic rod 8 is fixed to the bottom cavity wall of the inner cavity 13 by bolts. Its output end is set upward and is rigidly connected to the bottom center of the moving connecting plate 9 by bolts to ensure that the electric telescopic rod 8 can stably drive the moving connecting plate 9 to move up and down when it extends and retracts. The bottom of the support frame 7 is fixed to the moving connecting plate 9 by welding with a connecting column. The top of the support frame 7 can pass through the opening between the inner cavity 13 and the placement slot 5 to realize the action of extending and retracting from the inner cavity 13 to the placement slot 5. In this embodiment, a conductive slip ring is used to power the rotating part. The cable is constrained below the work plate 2 by a drag chain to prevent the cable from getting tangled and causing the equipment to jam.

[0023] like Figure 4As shown, a fixed support plate 10 is welded to the inner wall of the inner cavity 13. The fixed support plate 10 is horizontally arranged. The horizontal part of the L-shaped connecting plate 12 is close to the fixed support plate 10. One end of the first spring 11 is fixed to the upper end of the fixed support plate 10, and the other end is fixed to the lower side of the horizontal part of the L-shaped connecting plate 12. The first spring 11 is vertical in the vertical direction. When the first spring 11 is in a slightly compressed state, the horizontal part of the L-shaped connecting plate 12 is in a non-contact state with the moving connecting plate 9. The first spring 11 can be a cylindrical helical compression spring. This type of spring has the characteristics of simple structure and easy manufacturing. It can generate large elastic deformation when subjected to axial pressure and has stable reset performance. In terms of material selection, high-strength spring steel can be selected, which has good elastic limit and fatigue strength, and can meet the requirements of the first spring 11 in repeated extension and retraction. It ensures that it is not prone to plastic deformation or breakage during long-term operation, thereby ensuring the reliable reset of the L-shaped connecting plate 12 and providing stable support for the normal operation of the clamping assembly 6.

[0024] like Figure 6 As shown, the positioning seat 3 has movable cavities 69 on both sides of the placement groove 5. A through hole is provided between the movable cavity 69 and the placement groove 5 for the sliding rod 62 to pass through. The movable inclined block 66 is slidably disposed in the movable cavity 69. A T-shaped sliding plate 67 is integrally formed on one side of the movable inclined block 66. A matching sliding groove 68 is provided on the inner wall of the positioning seat 3 corresponding to the movable cavity 69. The T-shaped sliding plate 67 and the matching sliding groove 68 are slidably engaged to realize the stable sliding of the movable inclined block 66 along the direction of the matching sliding groove 68. The connecting plate 64 is located in the movable cavity 69. One end of the connecting plate 64 is rotatably connected to the rolling column 65 through a rotating shaft. The rolling column 65 can rotate freely around the rotating shaft, and the outer surface of the rolling column 65 is in contact with the inclined surface of the movable inclined block 66. The other end of the connecting plate 64 is welded and fixed to one end of the sliding rod 62. The other end of the sliding rod 62 passes through the through hole and extends into the placement groove 5, and is fixedly connected to the clamping plate 61 by bolts.

[0025] like Figure 6 As shown, a second spring 63 is sleeved on the sliding rod 62. One end of the second spring 63 abuts against the side of the connecting plate 64 away from the sliding rod 62, and the other end abuts against the inner wall of the moving cavity 69 near the through hole. In the initial state, the second spring 63 is in a naturally extended state. When the moving connecting plate 9 moves downward, the horizontal part of the L-shaped connecting plate 12 contacts the moving connecting plate 9 and is pushed downward, thereby its vertical part drives the moving inclined block 66 to slide downward along the mating groove 68. The second spring 63 can be a cylindrical helical compression spring. This type of spring can store elastic potential energy when compressed and generate a stable thrust when released. Its compact structure allows it to fit well into the installation space within the moving cavity 69, meeting the elastic support requirements for the extension and retraction of the sliding rod 62. 50CrVA spring steel is used; this material has excellent elasticity, toughness, and fatigue resistance, maintaining stable mechanical properties during repeated compression and recovery cycles, effectively preventing elastic decay or breakage due to long-term use.

[0026] Initial state, initial working position, such as Figure 4 As shown, the support frame 7 on the positioning seat 3 is in the placement groove 5, the first spring 11 is in a slightly compressed state, the L-shaped connecting plate 12 and the moving connecting plate 9 are in a non-contact state, the moving inclined block 66 is located in the upper initial position in the moving cavity 69, and the clamping plate 61 is in an unclamped state. Next, the workpiece 4 to be assembled is placed in the placement slot 5 of the positioning seat 3. The workpiece 4 falls on the support frame 7. The control system of the automatic assembly machine is started, and the electric telescopic rod 8 is controlled to retract. The support frame 7 moves from the inside of the placement slot 5 to the inner cavity 13. The workpiece 4 falls to the bottom of the placement slot 5. During this process, the electric telescopic rod 8 drives the moving connecting plate 9 to move downward. During the downward movement, the moving connecting plate 9 contacts the horizontal part of the L-shaped connecting plate 12 and drives the L-shaped connecting plate 12 to move downward. When the L-shaped connecting plate 12 moves downward, the end away from the first spring 11 drives the moving inclined block 66 to move downward. When the moving inclined block 66 moves downward, the T-shaped slide plate 67 slides downward in the matching slide groove 68. Since the rolling column 65 and the inclined surface of the moving inclined block 66 cooperate with each other and the outer surface of the rolling column 65 is in close contact with the inclined surface of the moving inclined block 66, the movement of the moving inclined block 66 drives the rolling column 65 to roll. The rolling of the rolling column 65 drives the sliding rod 62 to slide through the connecting plate 64. When the sliding rod 62 slides, the second spring 63 sleeved on it is compressed. At the same time, the sliding rod 62 drives the clamping plate 61 to move into the placement groove 5 to clamp and fix the workpiece 4 placed in the placement groove 5. Then, the working plate 2 is controlled to rotate, and the positioning seat 3 containing the workpiece 4 is rotated to the assembly station. After the workpiece 4 is clamped and fixed and is in the assembly station, the other assembly parts of the automatic assembly machine start to work and perform assembly operations on the workpiece 4. After the workpiece 4 is assembled, the control system controls the electric telescopic rod 8 to extend. The electric telescopic rod 8 drives the moving connecting plate 9 to move upward. During the upward movement of the moving connecting plate 9, it disengages from the L-shaped connecting plate 12. The first spring 11 returns to its original state, driving the L-shaped connecting plate 12 to move downward. When the L-shaped connecting plate 12 moves downward, the moving inclined block 66 moves upward under the action of the second spring 63. The T-shaped sliding plate 67 slides upward in the matching sliding groove 68. The rolling column 65 rolls in the opposite direction, driving the sliding rod 62 to move away from the placement groove 5 through the connecting plate 64. The clamping plate 61 leaves the surface of the workpiece 4. At the same time, the electric telescopic rod 8 drives the support frame 7 to move upward. The support frame 7 pushes the assembled workpiece 4 upward, making it convenient for the operator to remove the workpiece 4. The rotation of the working plate 2 realizes continuous positioning, clamping and assembly operations.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning jig of an automatic assembly machine, comprising a support table (1) and a worktable (2), characterized in that: Multiple positioning seats (3) are fixedly provided on the working plate (2), and the positioning seats (3) are provided with placement slots (5) for placing workpieces (4); The positioning seat (3) has an inner cavity (13) on its inner side. An electric telescopic rod (8) is fixed in the inner cavity (13). The output end of the electric telescopic rod (8) is connected to a movable connecting plate (9). A support frame (7) is fixedly connected to the movable connecting plate (9). The support frame (7) can extend and retract from the inner cavity (13) to the placement slot (5). The positioning seat (3) is provided with a clamping assembly (6) for clamping the workpiece (4). The clamping assembly (6) can clamp or release the workpiece (4) in the placement slot (5) during the process of the electric telescopic rod (8) driving the moving connecting plate (9) to move.

2. The positioning fixture of an automatic assembly machine according to claim 1, wherein: A fixed support plate (10) is fixed inside the inner cavity (13). A first spring (11) is fixedly connected between the fixed support plate (10) and the L-shaped connecting plate (12). The L-shaped connecting plate (12) can be pushed when the moving connecting plate (9) moves downward, and can be reset by the first spring (11) when the moving connecting plate (9) moves upward.

3. The positioning fixture of an automatic assembly machine according to claim 2, wherein: The clamping assembly (6) includes a movable cavity (69) opened in the positioning seat (3), a movable inclined block (66) is slidably arranged in the movable cavity (69), and a connecting plate (64) is also arranged in the movable cavity (69). A rolling column (65) is rotatably connected to one end of the connecting plate (64), and a sliding rod (62) is fixedly connected to the other end of the connecting plate (64).

4. The positioning fixture of an automatic assembly machine according to claim 3, wherein: One end of the sliding rod (62) slides into the placement groove (5) and is fixedly connected to the clamp (61). The end of the L-shaped connecting plate (12) away from the first spring (11) is connected to the moving inclined block (66).

5. The positioning fixture of an automatic assembly machine according to claim 4, wherein: One end of the movable inclined block (66) is fixed with a T-shaped sliding plate (67), and the positioning seat (3) is provided with a matching groove (68) for the T-shaped sliding plate (67) to slide. The T-shaped sliding plate (67) and the matching groove (68) slide together.

6. The positioning fixture of an automatic assembly machine according to claim 5, wherein: The outer surface of the rolling column (65) is in contact with the inclined surface of the moving inclined block (66), and the rolling column (65) can roll as the moving inclined block (66) moves.

7. The positioning fixture of an automatic assembly machine according to claim 6, wherein: A second spring (63) is sleeved on the sliding rod (62). One end of the second spring (63) abuts against the connecting plate (64), and the other end abuts against the inner wall of the moving cavity (69).

8. The positioning fixture of an automatic assembly machine according to claim 1, wherein: Multiple positioning seats (3) are evenly distributed along the circumference of the working disk (2), which is rotatably mounted on the support platform (1).

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