A lead screw feeding mechanism

Abstract

This utility model discloses a lead screw feeding mechanism, belonging to the field of lead screw assembly. It solves the problem that clamping mechanisms affect the feeding and unloading efficiency of lead screws. The technical solution mainly includes a rotary table and a clamping mechanism that rotates with the rotary table. The clamping mechanism includes several clamps distributed circumferentially along the rotary table. Each clamp includes a support base and two jaws hinged to the support base. An elastic element is provided between the two jaws to encourage them to move closer together. Guide wheels are rotatably connected to the ends of the jaws, and these guide wheels are located at the opening of the clamp to guide the lead screw into or out of the clamp. This utility model's clamp consists of two jaws loaded by the elastic element. By applying force to the lead screw, it can be made to enter or leave the clamp, thereby improving the feeding and unloading efficiency of the lead screw.

Description

Technical Field

[0001] This utility model discloses a lead screw feeding mechanism, which belongs to the field of lead screw assembly technology. Background Technology

[0002] Linear actuators, also known as electric linear actuators, work primarily by using a motor to drive a lead screw to rotate. A nut is mounted on the lead screw, and as the lead screw rotates, it causes the nut to reciprocate along the lead screw axis.

[0003] The manufacturing process of a linear brake first requires the assembly of the lead screw, nut, and bearing. During assembly, a clamping mechanism is needed to position the lead screw. However, in the existing technology, the clamping mechanism needs to control the opening of the clamping fixture when the lead screw is installed and removed so that the lead screw can enter or leave the fixture. The opening and closing of the clamping mechanism wastes a lot of time, which in turn affects the efficiency of the lead screw loading and unloading. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the clamping mechanism affects the feeding and unloading efficiency of the lead screw. To this end, a lead screw feeding mechanism is provided. The clamp consists of two grippers loaded by elastic elements. By applying force to the lead screw, the lead screw can be made to enter or leave the clamp, thereby improving the feeding and unloading efficiency of the lead screw.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A lead screw feeding mechanism includes a rotary table and a clamping mechanism that rotates with the rotary table. The clamping mechanism includes several clamps distributed circumferentially along the rotary table. Each clamp includes a support base and two jaws hinged to the support base. An elastic element is provided between the two jaws to make the two jaws tend to move closer to each other. The ends of the jaws are rotatably connected to guide wheels, which are located at the opening of the clamps to guide the lead screw into or out of the table.

[0007] The beneficial effects of using this utility model are:

[0008] The clamp described in this utility model includes two jaws, with an elastic element between them. The elastic element causes the two jaws to tend to move closer together. A guide wheel is rotatably connected to the end of each jaw, and the guide wheel is located at the opening of the clamp. When the lead screw enters or disengages from the clamp, the user applies force to the lead screw, causing it to contact the guide wheel and enter or disengage under its guidance. The guide wheel creates rolling friction with the lead screw, thereby reducing the frictional resistance on the lead screw. This reduces the external force required by the user when the lead screw enters or disengages from the clamp, and also avoids the possibility of the lead screw getting stuck between the jaws and the clamp. This makes the installation and disassembly of the lead screw more convenient and effortless. Simultaneously, the rolling contact between the lead screw and the guide wheel also reduces wear on the lead screw caused by the jaws. The system reduces the possibility of scratches; furthermore, during the installation and removal of the lead screw, the user only needs to push the lead screw into or pull it out of the clamp by hand, without waiting for the clamping mechanism to move, which can quickly complete the installation and removal of the lead screw and significantly improve the feeding and unloading efficiency of the lead screw; secondly, the two jaws are kept closed by the elastic element, which can ensure that the lead screw remains in position in subsequent processes and is not prone to falling off. At the same time, the two jaws can also be adapted to lead screws of different sizes, which helps to improve the applicability of the clamping mechanism; furthermore, the clamping mechanism rotates with the rotary table, and the clamping mechanism has several clamps. The rotary table drives multiple clamps to rotate synchronously, which can realize continuous feeding and efficiency, thereby significantly improving the production efficiency of the lead screw.

[0009] Preferably, the lead screw feeding mechanism includes two clamping mechanisms. A support frame is fixed on the rotary table, and the two clamping mechanisms are positioned at intervals on the support frame. The clamps of the two clamping mechanisms correspond to each other, and the lead screw is simultaneously clamped by the clamps of both clamping mechanisms. By employing the aforementioned technical solution, the lead screw is clamped by two clamps spaced apart, providing dual positioning points to prevent swaying and improve the positioning stability of the lead screw, ensuring the normal operation of subsequent processes. Furthermore, using two clamps to hold the lead screw provides clamping stability, further reducing the possibility of the lead screw detaching from the clamps.

[0010] Preferably, the support frame includes at least two support rods, a support base is penetrated by the support rods and slidably connected to them, and the support base is provided with an adjusting member for locking the support rods, so that the support base and the support rods are positioned. Using the aforementioned technical solution, the slidable connection between the support base and the support rods allows adjustment of the distance between the two clamping mechanisms, enabling them to clamp lead screws of different lengths, thus improving the applicability of the clamping mechanisms.

[0011] Preferably, the support base is provided with a through hole for the support rod to pass through, and the adjusting component includes a clamp connected to the support base. The support rod passes through both the through hole and the clamp, and the clamp is adjusted for the clamping force on the support rod by fasteners.

[0012] Preferably, the support base has at least one guide wheel along its edge, and the clamp holds the lead screw so that the guide wheel abuts against the outer periphery of the lead screw. Using the aforementioned technical solution, when the clamp holds the lead screw, the lead screw abuts against and remains positioned against the multiple guide wheels. The guide wheels can generate rolling friction with the lead screw, which helps reduce the friction between the lead screw and the clamp, reducing the possibility of the threads on the lead screw surface being damaged or scratched due to friction, thus maintaining the accuracy of the lead screw.

[0013] Preferably, the lead screw feeding mechanism further includes a frame and a mounting base slidably connected to the frame. A rotary table is mounted on the mounting base, and a drive motor is mounted on the frame. A transmission component is provided between the drive motor and the mounting base, and the drive motor drives the mounting base to move up and down along the frame via the transmission component. Using the aforementioned technical solution, since the assembly positions of the nuts and bearings are fixed when assembling the lead screw, and the position of the lead screw tip changes with the length of the lead screw when using lead screws of different lengths, the drive motor and transmission component control the lifting and lowering of the mounting base to ensure that the tip of the lead screw is stably maintained at the same height. This facilitates the subsequent assembly of nuts and bearings, allowing the lead screw feeding mechanism to assemble lead screws of more different lengths, further improving the applicability of the lead screw feeding mechanism.

[0014] Preferably, the transmission component includes a transmission screw rotatably connected to the frame and a transmission nut fixed to the mounting base and connected to the transmission screw. The output end of the drive motor is fixedly connected to the transmission screw, and the drive motor controls the mounting base to rise and fall through the transmission screw and the transmission nut.

[0015] Preferably, the frame is provided with a slide rail for the mounting base to slide, and both ends of the slide rail are provided with limit blocks to prevent the mounting base from disengaging from the slide rail.

[0016] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a screw feeding mechanism according to the present invention;

[0019] Figure 2 This is a schematic diagram of the rotary table and clamping mechanism in a screw feeding mechanism of this utility model;

[0020] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0021] Reference numerals in the attached drawings: 1. Frame; 11. Drive motor; 12. Lead screw; 13. Slide rail; 131. Limit block; 2. Mounting base; 3. Rotary disk; 4. Clamping mechanism; 41. Support base; 42. Gripper; 43. Elastic element; 44. Guide wheel; 45. Clamping clamp; 46. Through hole; 5. Lead screw; 51. Nut; 52. Bearing. Detailed Implementation

[0022] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figures 1 to 3 As shown in the figure, this embodiment illustrates a lead screw 5 feeding mechanism, including a rotary table and a clamping mechanism 4 that rotates with the rotary table. The clamping mechanism 4 includes several clamps distributed circumferentially along the rotary table. Each clamp includes a support base 41 and two jaws 42 hinged to the support base 41. An elastic element 43 is provided between the two jaws 42 to make the two jaws 42 tend to move closer to each other. A guide wheel 44 is rotatably connected to the end of the jaw 42. The guide wheel 44 is located at the opening of the clamp to guide the lead screw 5 to enter or disengage.

[0026] The clamp described in this embodiment includes two jaws 42, with an elastic element 43 between them. The elastic element 43 causes the two jaws 42 to tend to move closer to each other. A guide wheel 44 is rotatably connected to the end of each jaw 42. The guide wheel 44 is located at the opening of the clamp. When the lead screw 5 enters or leaves the clamp, the user applies force to the lead screw 5. The lead screw 5 contacts the guide wheel 44 and enters or leaves the clamp under the guidance of the guide wheel 44. The guide wheel 44 can form rolling friction with the lead screw 5, thereby reducing the frictional resistance experienced by the lead screw 5. This reduces the external force required by the user when the lead screw 5 enters or leaves the clamp, and also avoids the possibility of jamming between the lead screw 5 and the jaws 42. This makes the installation and removal of the lead screw 5 more convenient and effortless. Simultaneously, the rolling contact between the lead screw 5 and the guide wheel 44 also reduces the frictional resistance. The possibility of wear or scratching of the screw 5 by the gripper 42 is reduced; in addition, during the installation and disassembly of the screw 5, the user only needs to push the screw 5 into or pull it out of the clamp by hand, without waiting for the movement of the clamping mechanism 4, which can quickly complete the installation and disassembly of the screw 5, and can significantly improve the feeding and unloading efficiency of the screw 5; secondly, the two grippers 42 are loaded by the elastic element 43 to keep them closed, which can ensure that the screw 5 remains in position in subsequent processes and is not prone to falling off. At the same time, the two grippers 42 can also be adapted to screws 5 of different sizes, which helps to improve the applicability of the clamping mechanism 4; furthermore, the clamping mechanism 4 rotates with the rotary table, and the clamping mechanism 4 has several clamps. The rotary table drives multiple clamps to rotate synchronously, which can realize continuous feeding and efficiency, and thus significantly improve the production efficiency of the screw 5.

[0027] like Figure 2 and Figure 3 As shown, the lead screw 5 feeding mechanism in this embodiment includes two clamping mechanisms 4. A support frame is fixed on the rotating table. The support frame includes at least two support rods, which are arranged vertically. Each clamping mechanism 4 includes a support seat 41. The support seat 41 has a through hole for the support rod to pass through. The support seat 41 is positioned on the support rod. The rotating table drives the support seat 41 to rotate through the support rod. The support seats 41 of the two clamping mechanisms 4 are positioned vertically at intervals on the support frame, and the clamps of the two clamping mechanisms 4 are corresponding. That is, the clamp of the upper clamping mechanism 4 is directly above the clamp of the lower clamping mechanism 4. When the lead screw 5 is installed into the clamp, the same lead screw 5 is clamped by the two clamps at the same time, and the lead screw 5 is parallel to the support plate, keeping the lead screw 5 in a vertical state, ensuring that the nut 51 and bearing 52 can be assembled smoothly.

[0028] In this embodiment, two clamps are used to hold the same lead screw 5, and the two clamps are spaced apart. This provides a double positioning point for the lead screw 5, preventing it from swaying and improving its positioning stability, thus ensuring the normal operation of subsequent processes. Furthermore, using two clamps to hold the lead screw 5 provides clamping stability and further reduces the possibility of the lead screw 5 detaching from the clamps. Additionally, having at least two support rods ensures that the support base 41 does not rotate relative to the support rods, allowing the support base 41 to rotate synchronously with the rotary table, enabling continuous feeding and high efficiency. Moreover, positioning the support base 41 with multiple support rods helps to keep the support base 41 as horizontal as possible, reducing its tilt angle and making the clamping mechanism 4's gripping of the lead screw 5 more stable and reliable.

[0029] It should be noted that the support frame described in this embodiment includes four support rods and a connecting plate fixed to the top of the support rods. The four support rods are circumferentially distributed, and the connecting plate is circular and connected to the top of the four support rods. The connecting plate can position the four support rods, keeping the spacing between the four support rods the same, and can also reduce the swaying amplitude of the support rods, thereby improving the positioning stability of the support rods on the clamping mechanism 4.

[0030] It is understandable, of course, that in other embodiments, the number of support rods may also be three or more than four.

[0031] In addition, the support base 41 in this embodiment is provided with an adjusting component for locking the support rod. The adjusting component includes a clamp 45 connected to it. The support rod passes through the through hole of the support base 41 and also passes through the clamp 45. The clamp 45 is adjusted for tightness by fasteners. When it is necessary to adjust the distance between the two support bases 41, the clamp 45 is loosened by fasteners, so that the clamp 45 releases the locking of the support rod, thereby allowing the support base 41 to slide along the support rod. When the support base 41 slides to a specified height, the clamp 45 is tightened by fasteners, so that the clamp 45 locks the support rod, thereby achieving the positioning of the support rod and the support base 41. The support base 41 and the support rod are slidably connected, which can adjust the distance between the two clamping mechanisms 4, so that the two clamping mechanisms 4 can clamp lead screws 5 of different lengths, which helps to improve the applicability of the clamping mechanism 4.

[0032] like Figure 1 and Figure 2As shown, the rotary table in this embodiment includes a rotating platform, a cam divider, and a servo motor. The output end of the servo motor is connected to the input end of the cam divider. The cam divider is fixed to the bottom of the rotating platform. The servo motor drives the rotating platform to rotate through the cam divider. The cam divider converts the continuous rotational motion of the servo motor into the intermittent rotation of the rotating platform, thereby ensuring that the lead screw 5 remains stationary when assembling the nut 51 and the bearing 52. At the same time, the servo motor does not need to be repeatedly started and stopped, avoiding damage to the servo motor due to repeated starts and stops. In this embodiment, a transmission wheel is fixed to the output end of the servo motor, and a transmission wheel is also fixed to the input end of the cam divider. A transmission belt is fitted between the two transmission wheels, and the servo motor transmits power to the cam divider through the transmission belt.

[0033] like Figure 3 In this embodiment, the support base 41 has at least one guide wheel 44 along its edge. The clamp holds the lead screw 5 so that the guide wheel 44 abuts against the outer periphery of the lead screw 5. When the clamp holds the lead screw 5, the lead screw 5 abuts against the multiple guide wheels 44 and remains positioned. The guide wheels 44 can form rolling friction with the lead screw 5, which helps to reduce the friction between the lead screw 5 and the clamp 42, reducing the possibility of the threads on the surface of the lead screw 5 being damaged or scratched due to friction, thereby maintaining the accuracy of the lead screw 5. It should be noted that in this embodiment, two guide wheels 44 are rotatably connected to the support base 41. When the lead screw 5 is held by the clamp, all four guide wheels 44 abut against the outer periphery of the lead screw 5 simultaneously. Of course, it can be understood that in other embodiments, the number of guide wheels 44 on the support base 41 may be greater than two.

[0034] like Figure 1As shown, the lead screw 5 feeding mechanism in this embodiment includes a frame 1, which is generally rectangular. A mounting base 2 is slidably connected inside the frame 1, and a rotating platform is mounted on the mounting base 2, meaning the rotating platform can slide relative to the frame 1 with the mounting base 2. Slide rails 13 are provided on both side walls of the frame 1, distributed vertically. The mounting base 2 is slidably connected to the slide rails 13. A drive motor 11 is mounted on the frame 1, and a transmission component is provided between the drive motor 11 and the mounting base 2. The drive motor 11 drives the mounting base 2 to move up and down along the slide rails 13 via the transmission component. Since the assembly positions of the nut 51 and bearing 52 are fixed when assembling the lead screw 5, the mechanism is designed to be flexible and efficient. The position of the top of the lead screw 5 will change with the length of the lead screw 5 when different lengths of lead screw 5 are used. The mounting base 2 is raised and lowered by the drive motor 11 and the transmission component so that the top of the lead screw 5 can be stably kept at the same height, so as to facilitate the subsequent assembly of the nut 51 and bearing 52. This allows the lead screw 5 feeding mechanism to assemble more lead screws 5 of different lengths, further improving the applicability of the lead screw 5 feeding mechanism. In addition, in order to prevent the mounting base 2 from disengaging from the slide rail 13, the frame 1 in this embodiment is provided with a slide rail 13 for the mounting base 2 to slide. Both ends of the slide rail 13 are provided with limit blocks 131 to prevent the mounting base 2 from disengaging from the slide rail 13.

[0035] In this embodiment, the drive motor 11 is fixed to the top of the frame 1. The transmission components include a transmission screw 12 and a transmission nut fixed to the mounting base 2. The two ends of the transmission screw 12 are rotatably connected to the top and bottom of the frame 1, respectively. The support base 41 of the clamping mechanism 4 is provided with a through hole 46 for the transmission screw 12 to pass through. The transmission screw 12 passes through the clamping mechanism 4 and the rotating table from the top of the frame 1 and is rotatably connected to the bottom of the frame 1. The output end of the drive motor 11 is connected to a reduction mechanism. The top of the transmission screw 12 is connected to a coupling. The drive motor 11 is connected to the coupling through the reduction mechanism. The drive motor 11 drives the transmission screw 12 to rotate. Since the mounting base 2 is slidably connected to the slide rail 13 of the frame 1, the slide rail 13 also restricts the rotation of the frame 1. Therefore, the transmission nut will slide along the axial direction of the screw 5 under the action of the transmission screw 12, thereby driving the mounting base 2 to rise and fall.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A screw feeding mechanism, characterized in that, The device includes a rotary table and a clamping mechanism that rotates with the rotary table. The clamping mechanism includes several clamps distributed circumferentially along the rotary table. Each clamp includes a support base and two jaws hinged to the support base. An elastic element is provided between the two jaws to make the two jaws tend to move closer to each other. The ends of the jaws are rotatably connected to guide wheels, which are located at the opening of the clamp to guide the lead screw to enter or disengage.

2. The screw feeding mechanism according to claim 1, characterized in that, The lead screw feeding mechanism includes two clamping mechanisms. A support frame is fixed on the rotating table. The two clamping mechanisms are positioned at intervals on the support frame. The clamps of the two clamping mechanisms correspond to each other, and the lead screw is clamped by the clamps of the two clamping mechanisms at the same time.

3. The screw feeding mechanism according to claim 2, characterized in that, The support frame includes at least two support rods, a support base is penetrated by the support rods and slidably connected to the support rods, and the support base is provided with an adjusting member for locking the support rods so that the support base and the support rods are positioned.

4. The screw feeding mechanism according to claim 3, characterized in that, The support base has a through hole for the support rod to pass through. The adjusting component includes a clamp connected to the support base. The support rod passes through both the through hole and the clamp. The clamp adjusts the clamping force on the support rod through fasteners.

5. The screw feeding mechanism according to claim 1, characterized in that, The support base is provided with at least one guide wheel along its edge, and the clamp holds the lead screw so that the guide wheel abuts against the outer periphery of the lead screw.

6. The screw feeding mechanism according to claim 1, characterized in that, The screw feeding mechanism also includes a frame and a mounting base slidably connected to the frame. A rotary table is set on the mounting base. A drive motor is provided on the frame. A transmission component is provided between the drive motor and the mounting base. The drive motor drives the mounting base to move up and down along the frame through the transmission component.

7. A screw feeding mechanism according to claim 6, characterized in that, The transmission component includes a transmission screw rotatably connected to the frame and a transmission nut fixed to the mounting base and connected to the transmission screw. The output end of the drive motor is fixedly connected to the transmission screw, and the drive motor controls the mounting base to rise and fall through the transmission screw and the transmission nut.

8. A screw feeding mechanism according to claim 6, characterized in that, The frame is provided with a slide rail for the mounting base to slide on, and both ends of the slide rail are provided with limit blocks to prevent the mounting base from disengaging from the slide rail.

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