A clamping device for tapping motor shaft

Abstract

This utility model relates to a clamping device for tapping a motor shaft, including a bracket and a horizontal plate mounted on the top of the bracket. A fixing block is connected to the bottom surface of the horizontal plate, and a drive motor is mounted on the surface of the horizontal plate. A drive gear is connected to the output end of the drive motor. A positioning block is mounted on the surface of the horizontal plate near the drive gear, and a bidirectional lead screw is connected to the opening of the positioning block. This utility model allows the motor shaft to be placed at one end of the opening of the fixing block. When the drive motor is started, the bidirectional lead screw rotates at the opening of the positioning block, causing the threaded block to move closer to the motor shaft along the bidirectional lead screw. This causes the clamping plate at the bottom of the linkage plate to move along the opening on the side of the fixing block, thereby causing the pad at the clamping end of the clamping plate to clamp the motor shaft stably. This ensures the stability of the clamping during the tapping operation of the motor shaft and improves the quality of the tapping process.

Description

Technical Field

[0001] This utility model belongs to the field of motor shaft processing technology, specifically relating to a clamping device for tapping motor shafts. Background Technology

[0002] Motor shaft tapping refers to the process of machining internal threads on specific parts of a motor shaft (the core transmission component of a motor, usually made of metal). It is a sub-application of "tapping" (machining internal threads with a tap) in machining. The threads on the motor shaft are mainly used for assembly and fixing (such as connecting gears, pulleys, end caps, etc.), and their machining accuracy directly affects the assembly quality and operational stability of the motor.

[0003] In the prior art, Chinese utility model patent (authorization announcement number CN218946393U) discloses a clamping device for tapping a motor shaft, including a frame, a three-jaw chuck, a mounting component, a positioning component, and a handle; a guide rod is provided on the frame, and a limit block is provided on the guide rod; the mounting component is rotatably mounted on the frame; the three-jaw chuck is fixed on the mounting component; the positioning component consists of a coaxial positioning inner ring and a positioning outer ring; the positioning outer ring has a first through hole extending along the axis of the positioning outer ring, and the guide rod is clearance-fitted with the first through hole; the handle is connected to the positioning component and controls the positioning component to move closer to the three-jaw chuck, and the positioning inner ring presses against the jaws when moving, driving the jaws to move closer together to clamp the motor shaft; a reset elastic element is installed between the jaws and the mounting component. This utility model, by setting a positioning component and controlling the handle to move the positioning component, drives the jaws of the three-jaw chuck to move closer or separate synchronously, thereby realizing the rapid installation and disassembly of the motor shaft, saving manual time and improving work efficiency.

[0004] Specifically, the existing clamping device for tapping motor shafts disclosed above employs a manual control handle for clamping the motor shaft. This means that the clamping mechanism is tightened by manually rotating or turning the handle, thus fixing the motor shaft on the machining station and providing a foundation for subsequent tapping operations. However, tapping motor shafts places extremely high demands on the stability, coaxiality, and consistency of the clamping: stable clamping prevents shaft wobbling during tapping, which can lead to skewed or damaged threads; coaxiality (the clamping center coinciding with the tapping axis) directly affects the perpendicularity of the thread; and in mass production, the consistency of clamping force determines the uniformity of machining accuracy for each shaft. Manual operation relies on human experience, making precise control of clamping force difficult: if the force is too small, the motor shaft is prone to slight rotation or displacement under the tapping torque, resulting in thread accuracy exceeding tolerances; if the force is too large, it may cause surface damage or deformation of the shaft, especially for smaller diameter motor shafts, and may even directly damage the workpiece. Furthermore, under fatigue conditions, the tightness of the clamping and the positioning deviation of the shaft will fluctuate, leading to inconsistent thread quality in mass-produced motor shafts. Utility Model Content

[0005] The purpose of this utility model is to provide a clamping device for tapping motor shafts, which aims to solve the problem that manual operation relies on human experience and the clamping force is difficult to control precisely: if the force is too small, the motor shaft is prone to slight rotation or displacement under the action of tapping torque, resulting in thread accuracy exceeding the tolerance; if the force is too large, it may cause crushing and deformation of the shaft surface, especially for motor shafts with small diameters, and may even directly damage the workpiece. At the same time, under fatigue conditions, the tightness of clamping and the positioning deviation of the shaft will fluctuate, resulting in inconsistent quality of motor shaft threads in mass production.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a clamping device for tapping a motor shaft, comprising a bracket and a horizontal plate mounted on the top of the bracket, wherein a fixing block is connected to the bottom surface of the horizontal plate, and a drive motor is mounted on the surface of the horizontal plate;

[0007] The output end of the drive motor is connected to a drive gear. A positioning block is installed on the surface of the cross plate near the drive gear. A double-acting lead screw is connected to the opening of the positioning block. A driven gear is installed at the center of the double-acting lead screw. Threaded blocks are connected to both ends of the double-acting lead screw. A linkage plate is connected to the bottom end of the threaded block. A clamping plate is connected to the bottom end of the linkage plate. A pad is connected to the other side of the clamping plate. Guide blocks are connected to both the upper and lower ends of the clamping plate.

[0008] To facilitate automatic clamping of the motor shaft, in a preferred embodiment of the motor shaft tapping clamping device of this utility model, the driving gear and the driven gear on the surface of the bidirectional lead screw form a gear meshing structure, and the bidirectional lead screw is threadedly connected to the threaded block.

[0009] To facilitate the clamping and stabilization of the motor shaft, the preferred clamping device for tapping the motor shaft according to this utility model has the linkage plate and the clamping plate as an integral structure, and the clamping plate and the side opening of the fixing block are slidably connected.

[0010] In order to facilitate the protection of the surface of the motor shaft, the preferred clamping device for tapping the motor shaft of this utility model is made of rubber, and the pad is connected to the clamping plate by heat fusion.

[0011] To ensure stable movement of the clamping plate, in a preferred embodiment of the clamping device for tapping motor shafts according to this utility model, the inner wall of the fixing block near the guide block is provided with a guide groove, and the clamping plate forms a sliding connection structure with the guide groove on the inner wall of the fixing block through the guide block.

[0012] To ensure stable rotation of the bidirectional lead screw, in a preferred embodiment of the clamping device for tapping motor shafts according to this utility model, a limiting block is connected to the inner wall of the positioning block, the limiting block and the positioning block are integral structures, and the limiting block and the opening on the surface of the bidirectional lead screw form a rotating structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention places the motor shaft at the opening at one end of the fixed block. When the drive motor is started, the driving gear at the output end of the drive motor rotates, causing the driven gear to rotate synchronously. This causes the bidirectional lead screw to rotate at the opening of the positioning block, and simultaneously causes the threaded block to move closer to the motor shaft along the bidirectional lead screw. At this time, the clamping plate at the bottom of the linkage plate moves along the opening on the side of the fixed block, thereby causing the pad at the clamping end of the clamping plate to clamp the motor shaft stably. This ensures the stability of the clamping during the tapping operation of the motor shaft and improves the quality of the tapping process. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of the clamping device of this utility model.

[0017] Figure 2 This is a schematic diagram of the clamping plate connection structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the positioning block of this utility model.

[0019] In the diagram: 1. Bracket; 101. Drive motor; 2. Horizontal plate; 3. Fixing block; 4. Drive gear; 5. Positioning block; 51. Limiting block; 6. Two-way lead screw; 7. Driven gear; 8. Threaded block; 9. Linkage plate; 10. Clamping plate; 11. Pad plate; 12. Guide block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-3 The present invention provides the following technical solution: a clamping device for tapping a motor shaft, comprising a bracket 1 and a horizontal plate 2 installed at the top of the bracket 1, a fixing block 3 connected to the bottom surface of the horizontal plate 2, and a drive motor 101 installed on the surface of the horizontal plate 2.

[0022] The output end of the drive motor 101 is connected to the drive gear 4. A positioning block 5 is installed on the surface of the horizontal plate 2 near the drive gear 4. A double-acting lead screw 6 is connected to the opening of the positioning block 5. A driven gear 7 is installed at the center of the double-acting lead screw 6. Threaded blocks 8 are connected to both ends of the double-acting lead screw 6. A linkage plate 9 is connected to the bottom end of the threaded block 8. A clamping plate 10 is connected to the bottom end of the linkage plate 9. A pad 11 is connected to the other side of the clamping plate 10. Guide blocks 12 are connected to both the upper and lower ends of the clamping plate 10.

[0023] Preferably, the driving gear 4 and the driven gear 7 on the surface of the double-acting lead screw 6 form a gear meshing structure, and the double-acting lead screw 6 is threadedly connected to the threaded block 8. In actual use, the rotation of the double-acting lead screw 6 drives the two threaded blocks 8 to move synchronously, thereby facilitating the quick and stable clamping of the motor shaft;

[0024] Preferably, the linkage plate 9 and the clamping plate 10 are an integral structure, and the clamping plate 10 is slidably connected to the side opening of the fixing block 3. In actual use, the automatic movement of the clamping plate 10 facilitates automatic clamping of the motor shaft, improving the stability of clamping.

[0025] Preferably, the pad 11 is made of rubber and is connected to the clamping plate 10 by heat fusion. In actual use, the use of the pad 11 facilitates the clamping of the motor shaft without causing surface damage.

[0026] Preferably, the inner wall of the fixing block 3 near the guide block 12 is provided with a guide groove, and the clamping plate 10 forms a sliding connection structure with the guide groove on the inner wall of the fixing block 3 through the guide block 12. In actual use, when the clamping plate 10 moves along the opening on the side of the fixing block 3, it is convenient to drive the guide block 12 on the surface of the clamping plate 10 to slide along the guide groove on the inner wall of the fixing block 3, thus ensuring the directional movement of the clamping plate 10.

[0027] Preferably, the inner wall of the positioning block 5 is connected to a limiting block 51, and the limiting block 51 and the positioning block 5 are an integral structure. The limiting block 51 and the opening on the surface of the bidirectional lead screw 6 form a rotating structure. In actual use, when the driven gear 7 rotates, it drives the bidirectional lead screw 6 to rotate synchronously. As a result, the opening on the surface of the bidirectional lead screw 6 always rotates along the limiting block 51, ensuring the stability of the rotation of the bidirectional lead screw 6.

[0028] The working principle of this utility model is as follows: First, the motor shaft is placed at one end of the opening of the fixed block 3. Then, the drive motor 101 is started, which drives the drive gear 4 at the output end of the drive motor 101 to rotate, which in turn drives the driven gear 7 to rotate synchronously. At this time, the bidirectional lead screw 6 rotates at the opening of the positioning block 5, and the threaded block 8 moves closer to the bidirectional lead screw 6. This causes the clamping plate 10 at the bottom of the linkage plate 9 to move along the opening on the side of the fixed block 3, thereby causing the pad 11 at the clamping end of the clamping plate 10 to clamp the motor shaft stably, ensuring the stability of the clamping during the tapping operation of the motor shaft and improving the quality of the tapping operation. In addition, when the bidirectional lead screw 6 rotates at the opening of the positioning block 5, the limiting block 51 inside the positioning block 5 limits the rotation of the bidirectional lead screw 6, ensuring that the bidirectional lead screw 6 remains stable during the rotation process, and improving the stability and convenience of the movement of the clamping plate 10.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping device for tapping a motor shaft, comprising a bracket (1) and a horizontal plate (2) mounted on the top of the bracket (1), characterized in that: The bottom surface of the horizontal plate (2) is connected to a fixing block (3), and a drive motor (101) is installed on the surface of the horizontal plate (2). The output end of the drive motor (101) is connected to the drive gear (4). A positioning block (5) is installed on the surface of the horizontal plate (2) near the drive gear (4). A double-acting lead screw (6) is connected to the opening of the positioning block (5). A driven gear (7) is installed at the center of the double-acting lead screw (6). Threaded blocks (8) are connected to both ends of the double-acting lead screw (6). A linkage plate (9) is connected to the bottom end of the threaded block (8). A clamping plate (10) is connected to the bottom end of the linkage plate (9). A pad (11) is connected to the other side of the clamping plate (10). Guide blocks (12) are connected to both the upper and lower ends of the clamping plate (10).

2. The clamping device for tapping a motor shaft according to claim 1, characterized in that: The driving gear (4) and the driven gear (7) on the surface of the bidirectional lead screw (6) form a gear meshing structure, and the bidirectional lead screw (6) is threadedly connected to the threaded block (8).

3. The clamping device for tapping a motor shaft according to claim 1, characterized in that: The linkage plate (9) and the clamping plate (10) are an integral structure, and the clamping plate (10) and the side opening of the fixing block (3) are slidably connected.

4. The clamping device for tapping a motor shaft according to claim 1, characterized in that: The pad (11) is made of rubber and is connected to the clamping plate (10) by hot melting.

5. The clamping device for tapping a motor shaft according to claim 1, characterized in that: The fixing block (3) has a guide groove on its inner wall near the guide block (12), and the clamping plate (10) forms a sliding connection structure with the guide groove on the inner wall of the fixing block (3) through the guide block (12).

6. The clamping device for tapping a motor shaft according to claim 1, characterized in that: The inner wall of the positioning block (5) is connected to a limiting block (51), the limiting block (51) and the positioning block (5) are an integral structure, and the limiting block (51) and the opening on the surface of the bidirectional lead screw (6) form a rotating structure.

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