A spinning gripper

Abstract

The utility model relates to installation tool technical field, and disclose a kind of spinning gripper, including mounting bracket and the elevator and motor installed thereon, rotating pin is installed on mounting bracket with the rotation path of elevator in the middle, one end of rotating pin extends to mounting bracket and is transmission connection with the output end of motor by connecting rod mechanism, the other end of rotating pin is slidably sleeved with pull pin.The utility model's elevator drives pull pin to go up, so that inflation ring is extruded and deformed and expands, and then the inflation ring is supported tightly in the product inner circle, and the lower end of rotating pin abuts the upper end surface of product, realize the quick fixing of product, then motor is driven rotating pin rotation by connecting rod mechanism, utilize the parallelogram structure of connecting rod mechanism to enlarge motor torque, cooperate with the clamping of limiting sleeve and product slot, ensure high torque transmission, easily cope with spinning assembly of high torque product, solve the problem of traditional tool torque deficiency.

Description

Technical Field

[0001] This utility model relates to the field of installation tool technology, specifically a spinning gripper. Background Technology

[0002] In some component assembly workshops, the spinning assembly of ring-shaped parts is a high-frequency process that places extremely high demands on the torque and stability of the installation tools. However, traditional installation tools exhibit the following problems in such scenarios, severely restricting production efficiency and product quality:

[0003] 1. Insufficient torque leads to assembly failure.

[0004] Traditional installation tools (such as manual wrenches and ordinary robotic arms) rely on direct drive or simple gear transmission, and have limited output torque, which cannot meet the requirements of high-strength assembly. For example, in the installation of automotive gearbox bearings, high torque is required to ensure that the bearings are tightly fixed. Traditional tools cause the bearings to loosen due to insufficient torque. For the spin forming assembly of motor housings in new energy vehicles, traditional tools cannot provide sufficient torque, resulting in poor sealing of the housing and failure to pass waterproof performance tests.

[0005] 2. Instability in fixing can cause product damage.

[0006] Traditional tools often use rigid clamping, lacking an elastic compensation mechanism, making it difficult to adapt to the inner diameter tolerance of parts (such as a dimensional deviation of ±0.2mm). Moreover, rigid clamps may cause scratches on the inner surface of parts due to dimensional deviations. In addition, the single-point clamping of traditional tools is prone to uneven force distribution, causing parts to shift during spinning and resulting in misalignment during installation.

[0007] In summary, existing installation tools are insufficient to meet the installation requirements of products with high installation torque. Therefore, this application proposes a high-torque spinning gripper. Utility Model Content

[0008] To address the technical problems existing in the background art, this utility model proposes a spinning gripper.

[0009] This utility model proposes a spinning gripper, mainly used for spinning assembly of ring-shaped plastic parts. Specifically, it includes a mounting frame and a lifting mechanism and a motor mounted on it. The mounting frame is equipped with a rotating pin aligned with the moving path of the lifting mechanism. One end of the rotating pin extends into the mounting frame and is connected to the output end of the motor through a linkage mechanism. The other end of the rotating pin is slidably fitted with a pull pin. One end of the pull pin extends above the rotating pin and is connected to the moving end of the lifting mechanism. The other end of the pull pin has a radially extending boss, and an expansion ring fitted on the outer circumference of the pull pin is provided on the end face of the boss. The lifting mechanism drives the pull pin to move upward, so that the expansion ring is compressed and undergoes elastic deformation to tighten the inner circle of the product. The upper end face of the product abuts against the lower end of the rotating pin.

[0010] The motor is preferably a servo motor, and the lifting mechanism can be a cylinder, electric push rod, or electric lead screw, etc., as is available in the prior art. Here, a cylinder is preferred, and the rotating pin is fixedly connected to the moving end of the cylinder and coaxially aligned.

[0011] As a further optimization of this utility model, the linkage mechanism includes two rotating blocks and two connecting rods. The two rotating blocks are respectively installed on the output end of the motor and the upper outer periphery of the rotating pin. The rotating blocks have two movable ends facing opposite directions. The two connecting rods are arranged in parallel between the two rotating blocks. The two ends of the connecting rods are respectively hinged to the movable ends of the adjacent rotating blocks to form a parallelogram structure.

[0012] As a further optimization of this utility model, the cross-section of the rotating block is rhomboid, and the two acute-angled ends of the rhomboid are provided with movable grooves. The two ends of the connecting rod extend into the movable groove on the same side of the adjacent rotating block and are hinged by the hinge shaft.

[0013] As a further optimization of this utility model, a limiting sleeve fitted on the pull pin is snapped onto the lower end face of the rotating pin, and the upper end of the product to be assembled has a slot that matches the limiting sleeve and snaps onto each other, so that the product to be assembled can increase the torque by rotating synchronously with the rotating pin.

[0014] As a further optimization of this utility model, the outer periphery of the limiting sleeve has multiple limiting blocks distributed in a ring symmetrical pattern, and the lower outer periphery of the rotating pin is provided with a limiting groove that is adapted to and corresponds to the limiting blocks.

[0015] As a further optimization of this utility model, a retaining ring is installed on the lower outer periphery of the pull pin, and an expansion ring is disposed between the boss of the pull pin and the retaining ring, with the upper and lower end faces of the expansion ring respectively in close contact with the lower end face of the retaining ring and the upper end face of the boss.

[0016] As a further optimization of this utility model, the upper end and middle part of the rotating pin are rotatably connected to the mounting bracket through bearings.

[0017] As a further optimization of this utility model, an oil-free bushing is installed inside the lower end of the rotating pin and fitted onto the pull pin, and the pull pin is slidably connected to the inner wall of the oil-free bushing.

[0018] As a further optimization of this utility model, the boss at the lower end of the pull pin is frustum-shaped, and the upper area of ​​the frustum is larger than the lower area.

[0019] As a further optimization of this utility model, the expansion ring is a silicone ring.

[0020] The spinning gripper proposed in this utility model has the following beneficial effects:

[0021] (i) The lifting platform drives the pulling pin to move upward, causing the expansion ring to be squeezed and deformed and expand, thereby making the expansion ring tighten the inner circle of the product. The lower end of the rotating pin abuts against the upper surface of the product, realizing the rapid fixation of the product. Then, the motor drives the rotating pin to rotate through the linkage mechanism. The parallelogram structure of the linkage mechanism amplifies the motor torque. With the engagement of the limit sleeve and the product slot, high torque transmission is ensured, easily handling the spinning assembly of high torque products and solving the problem of insufficient torque of traditional tools.

[0022] (ii) The frustum-shaped boss at the lower end of the pull pin cooperates with the retaining ring, so that the expansion ring is elastically deformed after being squeezed. The expansion ring expands outward and fits tightly against the inner circle of the product. Moreover, the elastic characteristics of the expansion ring can compensate for the tolerance of the inner circle of the product, ensuring uniform and stable clamping force and avoiding assembly slippage or damage caused by dimensional deviation, thereby tightening the inner circle of the product. This design can adapt to ring products with different inner diameters and can be compatible with multiple specifications without changing the fixture, thus improving the versatility of the equipment.

[0023] (iii) The linkage mechanism adopts a parallelogram structure consisting of two rhomboid rotating blocks and a connecting rod. The movable slot of the rotating block is hinged to the connecting rod to form a linkage transmission. This structure can convert the rotational motion of the motor into the synchronous rotation of the rotating pin, while balancing the radial force, reducing the shaking of the rotating pin, and ensuring the stability of the rotation process. Even under high torque conditions, it can maintain smooth transmission and avoid the decrease in assembly accuracy caused by vibration.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0027] Figure 3 This is a first-view structural schematic diagram of the linkage mechanism of this utility model;

[0028] Figure 4 This is a second-view structural schematic diagram of the linkage mechanism of this utility model;

[0029] Figure 5 This is a front cross-sectional view of the present invention.

[0030] Figure descriptions: 1. Mounting bracket; 2. Lifting platform; 3. Motor; 4. Rotating pin; 5. Linkage mechanism; 51. Rotating block; 52. Connecting rod; 6. Pull pin; 7. Expansion ring; 8. Retaining ring; 9. Limiting sleeve; 10. Bearing; 11. Oil-free bushing. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] like Figure 1 and Figure 2 As shown, a spinning gripper includes a mounting frame 1 and a lifting platform 2 and a motor 3 mounted thereon. A rotating pin 4 aligned with the moving path of the lifting platform 2 is mounted on the mounting frame 1. One end of the rotating pin 4 extends into the mounting frame 1 and is connected to the output end of the motor 3 via a linkage mechanism 5. A pull pin 6 is slidably fitted on the other end of the rotating pin 4. One end of the pull pin 6 extends above the rotating pin 4 and is connected to the moving end of the lifting platform 2. The other end of the pull pin 6 has a radially extending boss, and an expansion ring 7 fitted around the outer periphery of the pull pin 6 is provided on the end face of the boss. The lifting platform 2 drives the pull pin 6 to move upward, causing the expansion ring 7 to be compressed and elastically deformed to tighten the inner circle of the product. The upper end face of the product abuts against the lower end of the rotating pin 4.

[0034] To address the issue of insufficient torque in traditional installation tools, this design uses a lifting platform 2 to drive the pull pin 6 to move up and down. When the pull pin 6 moves up, its boss squeezes the expansion ring 7 to make it expand outward, tightening the inner circle of the ring product. At the same time, the lower end of the rotating pin 4 abuts against the upper surface of the product, forming an upper and lower clamping. The motor 3 drives the rotating pin 4 to rotate through the linkage mechanism 5, transmitting torque to the product to achieve high-torque spinning assembly.

[0035] For example, in bearing installation scenarios that require high torque, the elastic support of the expansion ring 7 can ensure that the product is fixed firmly and avoid slippage. Combined with the rotation of the rotating pin 4, it can easily complete assembly tasks that are difficult to achieve with traditional tools.

[0036] The expansion ring 7 is preferably a silicone ring. Silicone rings have good elasticity and wear resistance, and can withstand multiple compression deformations without failure. Its soft material can avoid damage to the inner surface of the product. It is especially suitable for easily scratched materials such as aluminum alloy and plastic. When assembling ring parts of precision electronic components, the elastic support of the silicone ring can provide sufficient friction, while preventing surface scratches caused by hard contact, ensuring that the appearance and performance of the product are not affected.

[0037] like Figures 1-5 As shown, the boss at the lower end of the pull pin 6 is frustum-shaped, and the area at the upper end of the frustum is larger than the area at the lower end.

[0038] The frustum-shaped boss design ensures that when the pull pin 6 moves upward, the compressive force on the expansion ring 7 is evenly distributed radially, ensuring consistent radial expansion of the expansion ring 7. The larger area at the upper end of the frustum provides stronger compressive driving force, while the smaller area at the lower end guides the expansion ring 7 to expand evenly outward, adapting to products with different inner diameter tolerances. Even if there are slight deviations in the inner diameter of the product, it can still be tightly supported by the elastic deformation of the expansion ring 7, improving the compatibility of the equipment.

[0039] Specifically, such as Figure 3 and Figure 4 As shown, the linkage mechanism 5 includes two rotating blocks 51 and two connecting rods 52. The two rotating blocks 51 are respectively installed on the output end of the motor 3 and the upper outer periphery of the rotating pin 4. The rotating blocks 51 have two movable ends facing opposite directions. The two connecting rods 52 are arranged in parallel between the two rotating blocks 51. The two ends of the connecting rods 52 are respectively hinged to the movable ends of the adjacent rotating blocks 51 to form a parallelogram structure.

[0040] The linkage mechanism 5 adopts a parallelogram structure. When the motor 3 drives the active rotating block 51 to rotate, the driven rotating block 51 is driven to rotate synchronously through the linkage 52, ensuring that the rotating pin 4 rotates at the same speed as the motor 3. This structure can balance the radial force during the rotation process and reduce the shaking of the rotating pin 4. For example, under high torque conditions, the parallelogram structure can effectively suppress vibration, maintain smooth transmission, improve assembly accuracy, and avoid product damage or assembly failure due to structural instability.

[0041] like Figure 4 As shown, the cross-section of the rotating block 51 is rhomboid, and the two acute angle ends of the rhomboid are provided with movable grooves. The two ends of the connecting rod 52 extend into the movable groove on the same side of the adjacent rotating block 51 and are hinged by the hinge shaft.

[0042] The movable slot design of the rhomboid rotating block 51 provides a flexible hinge space for the connecting rod 52, allowing the rotating block 51 to maintain the parallelism of the connecting rod 52 during rotation. For example, when the rotating block 51 at the output end of the motor 3 rotates clockwise, the connecting rod 52 pushes the driven rotating block 51 to rotate clockwise synchronously. The movable slot ensures that the connecting rod 52 always maintains a reasonable distance from the hinge point of the rotating block 51, avoiding motion interference, thereby ensuring stable torque transmission. It is suitable for precision assembly scenarios that require high-precision transmission.

[0043] like Figures 1-5 As shown, a limiting sleeve 9 fitted on the pull pin 6 is snapped onto the lower end face of the rotating pin 4. The upper end of the product to be assembled has a slot that matches the limiting sleeve 9 and they snap together, so that the product to be assembled can increase the torque by rotating synchronously with the rotating pin 4.

[0044] The limiting sleeve 9 engages with the upper slot of the product through a snap-fit ​​structure, forming an additional torque transmission path. When the rotating pin 4 rotates, the snap-fit ​​between the limiting sleeve 9 and the product slot can prevent the product from slipping. It is especially suitable for scenarios with smooth surfaces or extremely high torque requirements. For example, when assembling large-size flanges, the snap-fit ​​between the limiting sleeve 9 and the product can assist the expansion ring 7 in transmitting greater torque, ensuring a stable and reliable assembly process and avoiding assembly failure due to insufficient clamping force.

[0045] Furthermore, the outer periphery of the limiting sleeve 9 has multiple limiting blocks distributed in a ring symmetrical arrangement, and the lower outer periphery of the rotating pin 4 is provided with a limiting groove that is adapted to and corresponds to the limiting blocks.

[0046] The cooperation between the limiting block and the limiting groove enables the quick assembly and disassembly of the limiting sleeve 9. During assembly, the limiting block is aligned with the limiting groove and inserted to fix the limiting sleeve 9 at the lower end of the rotating pin 4. During disassembly, the limiting sleeve 9 can be pulled down. This modular design makes it easy to replace the limiting sleeve 9 with different specifications to adapt to the slot shape of different products, thereby improving the versatility and flexibility of the equipment. For example, when switching the assembly of different models of ring products, there is no need to replace the entire fixture; only the limiting sleeve 9 needs to be replaced to complete the adaptation.

[0047] like Figures 1-5 As shown, a retaining ring 8 is installed on the lower outer periphery of the pull pin 6, and an expansion ring 7 is disposed between the boss of the pull pin 6 and the retaining ring 8, and the upper and lower end faces of the expansion ring 7 are respectively in close contact with the lower end face of the retaining ring 8 and the upper end face of the boss.

[0048] The retaining ring 8 and the boss form a bidirectional limiting of the expansion ring 7, ensuring that it deforms evenly when compressed. When the pull pin 6 moves upward, the boss presses the expansion ring 7 upward, and the retaining ring 8 restricts its downward movement, forcing the expansion ring 7 to expand radially and tighten the inner circle of the product. This design can prevent the expansion ring 7 from axially moving when under force, ensuring that the clamping force is evenly distributed. For example, when assembling thin-walled ring parts, the uniform clamping force can prevent the product from deforming due to excessive local force and improve the assembly quality.

[0049] like Figure 5 As shown, the upper end and middle part of the rotating pin 4 are rotatably connected to the mounting bracket 1 through the bearing 10. The bearing 10 significantly reduces the frictional resistance between the rotating pin 4 and the mounting bracket 1, ensuring that the rotating pin 4 can rotate at high speed and smoothly. In high-frequency assembly operations, the low friction characteristics of the bearing 10 can reduce energy loss, extend the service life of the equipment, and at the same time reduce component wear caused by frictional heat generation, ensuring the stability of long-term operation.

[0050] like Figure 5 As shown, an oil-free bushing 11 is installed inside the lower end of the rotating pin 4 and is fitted onto the pull pin 6, and the pull pin 6 is slidably connected to the inner wall of the oil-free bushing 11.

[0051] The oil-free bushing 11 provides a self-lubricating function, reducing the sliding friction between the pull pin 6 and the rotating pin 4. It is especially suitable for industrial environments where frequent lubrication is not possible, such as in scenarios with high dust or high cleanliness requirements. The oil-free bushing 11 can maintain smooth sliding without additional lubrication, avoiding oil contamination of products or the environment. At the same time, it serves to guide and extend the service life of the pull pin 6, reducing maintenance costs.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spinning gripper, comprising a mounting frame (1) and a lifting platform (2) and a motor (3) mounted thereon, characterized in that, The mounting bracket (1) is equipped with a rotating pin (4) aligned with the movement path of the elevator (2). One end of the rotating pin (4) extends into the mounting bracket (1) and is connected to the output end of the motor (3) via a linkage mechanism (5). The other end of the rotating pin (4) is slidably fitted with a pull pin (6). One end of the pull pin (6) extends above the rotating pin (4) and is connected to the moving end of the elevator (2). The other end of the pull pin (6) has a radially extending boss, and an expansion ring (7) fitted around the outer periphery of the pull pin (6) is provided on the end face of the boss. The elevator (2) drives the pull pin (6) to move upward, causing the expansion ring (7) to be compressed and elastically deformed to tighten the inner circle of the product. The upper end of the product abuts against the lower end of the rotating pin (4).

2. The spinning gripper according to claim 1, characterized in that, The linkage mechanism (5) includes two rotating blocks (51) and two connecting rods (52). The two rotating blocks (51) are respectively installed on the output end of the motor (3) and the upper outer periphery of the rotating pin (4). The rotating blocks (51) have two movable ends facing opposite directions. The two connecting rods (52) are arranged in parallel between the two rotating blocks (51). The two ends of the connecting rods (52) are respectively hinged to the movable ends of the adjacent rotating blocks (51) to form a parallelogram structure.

3. A spinning gripper according to claim 2, characterized in that, The cross-section of the rotating block (51) is rhomboid, and the two acute angle ends of the rhomboid are provided with movable grooves. The two ends of the connecting rod (52) extend into the movable groove on the same side of the adjacent rotating block (51) and are hinged by the hinge shaft.

4. A spinning gripper according to claim 1, characterized in that, The lower end face of the rotating pin (4) is fitted with a limiting sleeve (9) that is mounted on the pull pin (6). The upper end of the product to be assembled has a slot that matches the limiting sleeve (9) and they are engaged with each other.

5. A spinning gripper according to claim 4, characterized in that, The outer periphery of the limiting sleeve (9) has multiple limiting blocks that are symmetrically distributed in a ring. The lower outer periphery of the rotating pin (4) is provided with a limiting groove that is adapted to and corresponds to the limiting blocks.

6. A spinning gripper according to claim 1, characterized in that, A retaining ring (8) is installed on the lower outer periphery of the pull pin (6). An expansion ring (7) is set between the boss of the pull pin (6) and the retaining ring (8), and the upper and lower end faces of the expansion ring (7) are in close contact with the lower end face of the retaining ring (8) and the upper end face of the boss, respectively.

7. A spinning gripper according to claim 1, characterized in that, The upper end and middle part of the rotating pin (4) are rotatably connected to the mounting bracket (1) through the bearing (10).

8. A spinning gripper according to claim 1, characterized in that, An oil-free bushing (11) is installed inside the lower end of the rotating pin (4) and is fitted on the pull pin (6), and the pull pin (6) is slidably connected to the inner wall of the oil-free bushing (11).

9. A spinning gripper according to claim 1, characterized in that, The boss at the lower end of the pull pin (6) is frustum-shaped, and the area at the upper end of the frustum is larger than the area at the lower end.

10. A spinning gripper according to claim 1, characterized in that, The expansion ring (7) is a silicone ring.

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