A compression structure for a shaft of a connecting rod type micro motor

Abstract

The utility model provides a kind of connecting rod type micro motor axle center uses pressure structure, belong to motor processing equipment technical field.It has solved the existing pressure structure in due to the shaft of cylinder and motor is not concentric, force end and force end are not in the same center, and the pressure of cylinder has fluctuation, causes riveting head forming unstable and other problems.The utility model includes thimble and the three-plate frame structure of the upper plate, middle plate and lower plate, middle plate is located between upper plate and lower plate and can reciprocatingly lift and lower relative to upper plate and lower plate;Thimble is installed on middle plate, and one driving element is fixed on upper plate, the driving element is vertically lifted by connecting rod mechanism to drive middle plate, and driving element output end, thimble and motor coaxial center are arranged.The utility model is characterized in that force end and force end are in the same center, and motor axle center is more uniform in stress;Connecting rod mechanism is a force amplifier, and connecting rod mechanism can amplify the thrust of cylinder in the process of movement, and the pressure is increased.

Description

Technical Field

[0001] This utility model relates to the technical field of motor processing equipment, and more particularly to a clamping structure for the shaft of a connecting rod type micro motor. Background Technology

[0002] In the manufacturing of micro motors, shaft stamping and riveting is a key process, mainly used to fix the shaft of the micro motor. The shaft end is plastically deformed by vertical stamping pressure to form a rivet head to lock the component.

[0003] In existing stamping and riveting equipment, riveting is generally achieved by using a cylinder to drive the ejector pin to rise and fall. Because the cylinder and motor shafts are not aligned, the force-applying end and the force-receiving end are not on the same center, causing the ejector pin to apply force at an angle, while the motor shaft is subjected to force on one side, which may cause the shaft to bend. Moreover, the cylinder pressure fluctuates, causing the riveting force to be inconsistent, resulting in unstable riveting head forming (too small and it will loosen, too large and it will crush the shaft end). Utility Model Content

[0004] The main purpose of this invention is to address the aforementioned problems in the existing micro motor shaft stamping and riveting process, and to provide a pressing structure in which the cylinder and motor shaft are coaxially arranged and the stamping force is stable. The objective of this utility model can be achieved through the following technical solutions: A clamping structure for a linkage-type micro motor shaft is characterized by comprising a ejector pin and a three-plate frame structure consisting of an upper plate, a middle plate, and a lower plate. The upper plate and the lower plate are relatively fixed, and the middle plate is located between the upper plate and the lower plate and can move back and forth relative to the upper plate and the lower plate. The ejector pin is mounted on the middle plate, and a riveting station is provided below the ejector pin. The motor is located at the riveting station. A driving component is fixedly mounted on the upper plate. The driving component drives the middle plate to move vertically up and down through a linkage mechanism to apply axial clamping force to the motor shaft. The output end of the driving component, the ejector pin, and the motor are coaxially arranged. The linkage mechanism includes a first link, a second link, and a third link. One end of the first link is hinged to the piston rod of a cylinder. One end of the second link is hinged to the upper plate, and the other end is hinged to the free end of the first link. One end of the third link is hinged to the lower plate, and the other end is hinged to the free end of the first link.

[0005] In the aforementioned linkage-type micro motor shaft clamping structure, when the driving component pushes the middle plate down to its lowest position, linkage one rotates to a horizontal state, and linkages two and three rotate to a vertical state, with linkages two and three being collinear. At this time, the linkage mechanism moves to its dead center position.

[0006] In the above-mentioned clamping structure for the shaft of a linkage-type micro motor, there are two sets of linkage mechanisms, which are symmetrically arranged on the left and right sides relative to the axis of the ejector pin.

[0007] In the above-mentioned clamping structure for the shaft of a linkage-type micro motor, the driving component includes a cylinder, the cylinder body of which is fixed on the upper plate, and its piston rod drives the middle plate to move vertically up and down through a linkage mechanism.

[0008] In the above-mentioned clamping structure for the shaft of a connecting rod type micro motor, a connecting block is fixed on the piston rod of the cylinder, and the ends of the two connecting rods are hinged to the connecting block.

[0009] In the above-mentioned clamping structure for the shaft of a linkage-type micro motor, both the upper plate and the lower plate are provided with two joints, and the second and third connecting rods are respectively hinged to the joints on the upper plate and the lower plate.

[0010] In the above-mentioned clamping structure for the shaft of a linkage-type micro motor, a groove is provided at the hinge end of the second linkage facing the first linkage, and the third linkage passes through the groove and is hinged to the first linkage; each linkage mechanism has two first linkages, which are respectively located on both sides of the second linkage.

[0011] In the above-mentioned clamping structure for the shaft of a linkage-type micro motor, the middle plate moves up and down via a guide assembly. The guide assembly includes several guide rods and guide sleeves. The upper end of the guide rod is fixedly connected to the upper plate, and its lower end is fixedly connected to the lower plate. Each guide rod is provided with a guide sleeve, and each guide sleeve is fixedly connected to the middle plate. The middle plate moves up and down along the guide rod.

[0012] In the above-mentioned clamping structure for the shaft of a connecting rod type micro motor, the middle plate is also provided with an adjustment component for adjusting the height of the ejector pin. The adjustment component includes a sleeve and an adjustment screw. The sleeve is fixed on the middle plate, and the ejector pin passes through the sleeve from top to bottom, with its lower end extending out of the sleeve. The lower end of the adjustment screw extends into the inner cavity of the sleeve and is threadedly connected to the sleeve. The height is adjusted by rotating the adjustment screw, and the upper head of the ejector pin can move to abut against the adjustment screw.

[0013] In the aforementioned clamping structure for the shaft of a linkage-type micro motor, the ejector pin is tightly fitted to the inner wall of the sleeve. When the adjusting screw is raised, the ejector pin is pushed upward to abut against the adjusting screw, and the ejector pin will not fall off; when the adjusting screw is lowered, the adjusting screw will push the ejector pin to move downward synchronously.

[0014] In the above-mentioned clamping structure for the shaft of a connecting rod type micro motor, the adjusting screw is fixed to the sleeve by tightening a nut.

[0015] In the above-mentioned clamping structure for the shaft of a connecting rod type micro motor, a support base is also provided at the bottom of the lower plate to form a hollow layer at the bottom of the lower plate, and the above-mentioned riveting station is located in the hollow layer.

[0016] In the above-mentioned clamping structure for the shaft of a connecting rod type micro motor, the support seat is provided with an adjustment slot for adjusting the position of the support seat and the overall horizontal position of the clamping structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The cylinder, ejector pin, and motor are coaxially arranged, with the force-applying end and the force-receiving end at the same center. The ejector pin applies force vertically, and the force on the motor shaft is more evenly distributed. 2. The cylinder drives the middle plate and ejector pin to rise and fall through the linkage mechanism. This linkage mechanism is a force amplification mechanism. During the movement, the linkage mechanism can amplify the thrust of the cylinder, and the amplification effect reaches its maximum when it is close to the dead point. 3. When the dead point is reached, the self-locking characteristic of the dead point position makes it impossible to push the middle plate from bottom to top. This means that the axial clamping force applied by the ejector pin no longer depends on the continuous thrust of the cylinder, thereby greatly enhancing the stability and reliability of the system and effectively avoiding the problem of clamping force failure caused by air pressure fluctuations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the cylinder of this utility model when it retracts; Figure 2 This is a cross-sectional view of the cylinder of this utility model when it is retracted; Figure 3 This is a schematic diagram of the structure of the cylinder of this utility model when it is extended; Figure 4 This is a cross-sectional view of the cylinder of this utility model when it is extended; Figure 5 This is an enlarged schematic diagram of the linkage structure of this utility model; Figure 6 This is a schematic diagram of the structure of the ejector pin and adjustment assembly of this utility model; In the diagram, 1. Upper plate; 2. Middle plate; 3. Lower plate; 4. Ejector pin; 5. Connecting rod one; 6. Connecting rod two; 7. Connecting rod three; 8. Cylinder; 9. Connector; 10. Groove; 11. Guide rod; 12. Guide sleeve; 13. Connecting block; 14. Sleeve; 15. Adjusting screw; 16. Support base; 17. Adjusting slot. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] like Figures 1 to 4As shown, this embodiment provides an example of a clamping structure for a linkage-type micro motor shaft. In this embodiment, it includes a pin 4 and a three-plate frame structure composed of an upper plate 1, a middle plate 2, and a lower plate 3. The upper plate 1 and the lower plate 3 are fixed relative to each other, and the middle plate 2 is located between the upper plate 1 and the lower plate 3 and can move back and forth relative to the upper plate 1 and the lower plate 3. The pin 4 is mounted on the middle plate 2, and a riveting station is provided below the pin 4. The motor is set at the riveting station. A driving component is fixed on the upper plate 1. The driving component drives the middle plate 2 to move vertically up and down through a linkage mechanism to apply axial clamping force to the motor shaft. The output end of the driving component, the pin 4, and the motor are coaxially arranged.

[0021] like Figure 5 As shown, the linkage mechanism includes connecting rod 5, connecting rod 6, and connecting rod 7. One end of connecting rod 5 is hinged to the piston rod of cylinder 8; one end of connecting rod 6 is hinged to the upper plate 1, and the other end is hinged to the free end of connecting rod 5; one end of connecting rod 7 is hinged to the lower plate 3, and the other end is hinged to the free end of connecting rod 5. There are two sets of linkage mechanisms, symmetrically arranged about the left and right sides relative to the axis of the ejector pin 4. When the driving component pushes the middle plate 2 down to its lowest position, connecting rod 5 rotates to a horizontal state, and connecting rods 6 and 7 rotate to a vertical state, with connecting rods 6 and 7 collinear. At this time, the linkage mechanism moves to its dead center position. When the piston rod retracts, the pulling force of cylinder 8 changes the posture of connecting rod 5, causing the mechanism to move away from the dead center.

[0022] The driving component includes a cylinder 8, the cylinder body of which is fixed on the upper plate 1, and its piston rod drives the middle plate 2 to move vertically up and down via a linkage mechanism. A connecting block 13 is fixed on the piston rod of the cylinder 8, and the ends of two connecting rods 5 are hinged to the connecting block 13. Both the upper plate 1 and the lower plate 3 are provided with two joints 9, and connecting rods 6 and 7 are respectively hinged to the joints 9 on the upper plate 1 and the lower plate 3. A groove 10 is opened on the hinge end of connecting rod 6 facing connecting rod 5, and connecting rod 7 passes through the groove 10 and is hinged to connecting rod 5; each linkage mechanism has two connecting rods 5, which are respectively located on both sides of connecting rod 6.

[0023] The middle plate 2 moves up and down via a guide assembly, which includes several guide rods 11 and guide sleeves 12. The upper end of the guide rod 11 is fixedly connected to the upper plate 1, and its lower end is fixedly connected to the lower plate 3. Each guide rod 11 is provided with a guide sleeve 12, and each guide sleeve 12 is fixedly connected to the middle plate 2. The middle plate 2 moves up and down along the guide rods 11.

[0024] like Figure 6As shown, the middle plate 2 is also equipped with an adjustment assembly for adjusting the height of the ejector pin 4. This adjustment assembly includes a sleeve 14 and an adjustment screw 15. The sleeve 14 is fixed to the middle plate 2, and the ejector pin 4 passes through the sleeve 14 from top to bottom, with its lower end extending out of the sleeve 14. The lower end of the adjustment screw 15 extends into the inner cavity of the sleeve 14 and is threadedly connected to the sleeve 14. Rotating the adjustment screw 15 adjusts its height, allowing the upper head of the ejector pin 4 to move and abut against the adjustment screw 15. The adjustment screw 15 is tightened and fixed to the sleeve 14 by a nut. The ejector pin 4 is tightly fitted to the inner wall of the sleeve 14. When the adjustment screw 15 is adjusted upwards, it pushes the ejector pin 4 upwards to abut against the adjustment screw 15, preventing the ejector pin 4 from falling down. When the adjustment screw 15 is adjusted downwards, it pushes the ejector pin 4 downwards synchronously.

[0025] The bottom of the lower plate 3 is also provided with a support base 16, so that the bottom of the lower plate 3 forms a hollow layer, and the above-mentioned riveting station is located in the hollow layer. The support base 16 is provided with an adjustment slot 17 for adjusting the horizontal position of the support base 16 and the overall clamping structure.

[0026] The process of the piston rod of cylinder 8 moving from the retracted position to the extended position at dead center: like Figure 2 As shown, when the piston rod begins to extend: connecting rod 5 is tilted at a large angle to the horizontal. At this time, the lever arm of the thrust from cylinder 8 acting on connecting rod 5 is relatively short, and the lever arm length is the vertical distance from the thrust direction to the hinge point. At the same time, the lever arm of the lifting force generated by connecting rod 5 on the middle plate 2 is also in a relatively inefficient state.

[0027] During the movement: As the piston rod extends, connecting rod 5 gradually rotates horizontally. The lever arm of the thrust gradually lengthens, and the vertical distance between the thrust direction and the hinge point of connecting rod 5 increases. The transmission angle of the entire mechanism also becomes increasingly optimized, more effectively converting horizontal thrust into vertical lift. With movement, the force amplification factor continues to increase, resulting in a greater clamping force under the same thrust.

[0028] like Figure 4 As shown, the dead point position: at this point, the piston rod is fully extended, connecting rod 5 is horizontal, and connecting rods 6 and 7 are vertically collinear. This is the theoretical peak point of the amplification effect. The lever arm of the thrust reaches its maximum value, almost equal to the entire length of connecting rod 5, and the mechanism is in a "self-locking" state. This is exactly what the clamping structure requires—to achieve a huge and stable clamping force with a very small cylinder force.

[0029] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A clamping structure for the shaft of a linkage-type micro motor, characterized in that, The system includes a ejector pin (4) and a three-plate frame structure consisting of an upper plate (1), a middle plate (2), and a lower plate (3). The upper plate (1) and the lower plate (3) are relatively fixed. The middle plate (2) is located between the upper plate (1) and the lower plate (3) and can move up and down relative to the upper plate (1) and the lower plate (3). The ejector pin (4) is mounted on the middle plate (2). A riveting station is provided below the ejector pin (4). A motor is located at the riveting station. A driving component is fixed on the upper plate (1). The driving component drives the middle plate (2) through a linkage mechanism. The plate (2) is vertically raised and lowered to apply axial clamping force to the motor shaft. The output end of the drive component, the ejector pin (4), and the motor are coaxially arranged. The linkage mechanism includes a first linkage (5), a second linkage (6), and a third linkage (7). One end of the first linkage (5) is hinged to the piston rod of the cylinder (8). One end of the second linkage (6) is hinged to the upper plate (1), and the other end is hinged to the free end of the first linkage (5). One end of the third linkage (7) is hinged to the lower plate (3), and the other end is hinged to the free end of the first linkage (5).

2. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, When the driving component pushes the middle plate (2) down to the lowest position, the first link (5) rotates to a horizontal state, and the second link (6) and the third link (7) rotate to a vertical state and the second link (6) and the third link (7) are collinear.

3. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The linkage mechanism consists of two sets, which are symmetrically arranged on the left and right sides relative to the axis of the ejector pin (4).

4. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The driving component includes a cylinder (8), the cylinder body of which is fixed on the upper plate (1), and its piston rod drives the middle plate (2) to move vertically up and down through a linkage mechanism.

5. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 4, characterized in that, A connecting block (13) is fixed on the piston rod of the cylinder (8), and the ends of the two connecting rods (5) are hinged on the connecting block (13).

6. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, Both the upper plate (1) and the lower plate (3) are provided with two joints (9), and the second connecting rod (6) and the third connecting rod (7) are respectively hinged to the joints (9) on the upper plate (1) and the lower plate (3).

7. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The second link (6) has a groove (10) at the hinge end facing the first link (5). The third link (7) passes through the groove (10) and is hinged to the first link (5). There are two first links (5) in each link mechanism, and the two first links (5) are located on both sides of the second link (6).

8. The clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The middle plate (2) moves up and down via a guide assembly, which includes several guide rods (11) and guide sleeves (12). The upper end of the guide rod (11) is fixedly connected to the upper plate (1), and its lower end is fixedly connected to the lower plate (3). Each guide rod (11) is provided with a guide sleeve (12), and each guide sleeve (12) is fixedly connected to the middle plate (2). The middle plate (2) moves up and down along the guide rod (11).

9. A clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The middle plate (2) is also provided with an adjustment component for adjusting the height of the ejector pin (4). The adjustment component includes a sleeve (14) and an adjustment screw (15). The sleeve (14) is fixed on the middle plate (2). The ejector pin (4) passes through the sleeve (14) from top to bottom, and its lower end extends out of the sleeve (14). The lower end of the adjustment screw (15) extends into the inner cavity of the sleeve (14) and is threadedly connected to the sleeve (14). The height of the ejector pin (4) can be adjusted by rotating the adjustment screw (15). The head of the upper end of the ejector pin (4) can move to abut against the adjustment screw (15).

10. A clamping structure for the shaft of a connecting rod-type micro motor according to claim 1, characterized in that, The bottom of the lower plate (3) is also provided with a support seat (16) so that the bottom of the lower plate (3) forms an open layer, and the above-mentioned riveting station is located in the open layer; the support seat (16) is provided with an adjustment slot (17) for adjusting the position of the support seat (16) and the overall horizontal position of the pressing structure.

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