A machining tool
By combining the transmission wheel and the straightening sleeve with the coordinated operation of the cylinder motor, the deformation problem of the motor shaft steel bar during processing was solved, achieving efficient clamping, positioning and cutting, and improving production efficiency and capacity.
Patent Information
- Application Number
- CN202521915628.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-09-05
AI Technical Summary
In the prior art, motor shaft steel bars are prone to bending, warping, twisting and other deformations before and after processing, resulting in geometric errors such as non-parallel end faces, decreased cylindricity and increased concentricity deviation.
The steel bar is initially straightened and kept under the constraint of the straightening sleeve by the coordinated action of the first set of transmission wheels and the straightening sleeve. Combined with the coordinated operation of the first cylinder, the second cylinder and the two sets of motors, a complete cycle of clamping, positioning and cutting is achieved.
This reduces the risk of subsequent deformation of steel bars, increases the difficulty of achieving the required straightness in machining, and improves the capacity and efficiency of mass production and automated production.
Smart Images
Figure CN224939504U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor shaft machining, and in particular to a machining tooling. Background Technology
[0002] The motor shaft is one of the core transmission components inside a motor, located between the rotor and stator, and is typically a cylindrical metal shaft. It bears torque and transmits rotational force to external components such as couplings, gears, and pulleys. Machining fixtures are a collective term for a set of tools and jigs used to assist in the machining process and ensure the position, orientation, clamping, and positioning of the workpiece in different machining steps. Common types include positioning fixtures, fixture blocks, jigs, fixture seats, centering fixtures, and fixture tables.
[0003] In the process of realizing this application, the inventors discovered the following problems with the prior art: conventional motor shaft steel bars are bent before processing. Unconstrained steel bars are prone to bending, warping, twisting and other deformations before and after processing, which directly leads to geometric errors such as non-parallel end faces, decreased cylindricity, and increased concentricity deviation.
[0004] Therefore, those skilled in the art have provided a machining tooling to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a processing fixture that, through the synergistic action of the first set of transmission wheels and the straightening sleeve, initially straightens the steel bar and holds it within the constraint of the straightening sleeve, thereby reducing the risk of subsequent deformation of the steel bar.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A processing fixture includes a base plate, with a fixed box fixedly installed at one edge and the middle of the upper part of the base plate. A motor is fixedly installed on the upper part of the inner side of each of the two fixed boxes. A rotating column is rotatably installed on the middle part of the inner side of each of the two fixed boxes. A transmission wheel is fixedly installed on the output end of each of the two motors and the other side of the two rotating columns. A rubber pad is fixedly sleeved on the outer end of each of the four transmission wheels.
[0008] A straightening sleeve is fixedly installed on one side of the upper edge of the base plate, and a fixing plate is fixedly installed on the other side of the base plate. Guide posts are fixedly installed on both the front and rear sides of the fixing plate. Mounting plates are fixedly installed on the side of the fixing plate near the two guide posts. A first cylinder is fixedly installed on one side of each of the two mounting plates. A movable block is fixedly installed on the other side of each of the two first cylinders. A second cylinder is fixedly installed on the opposite side of each of the two movable blocks. A clamping plate is fixedly installed on the opposite side of each of the two second cylinders.
[0009] Furthermore, gears are fixedly fitted on the outer sides of the two motor output ends and on the other side of the outer ends of the two rotating columns.
[0010] Furthermore, the four gears mesh with each other in pairs, and the four gears are arranged in pairs at the inner ends of the two fixed boxes respectively.
[0011] Furthermore, the straightening sleeve is disposed on one side of the two fixing boxes opposite each other, and the straightening sleeve is disposed between each pair of the four No. 1 rubber pads.
[0012] Furthermore, the two movable blocks are respectively movably disposed at the outer ends of the two guide posts, and the two clamping plates are movably disposed above the fixed plate.
[0013] Furthermore, a second rubber pad is provided at the inner end of each of the two clamping plates, and the two clamping plates are positioned away from the multiple transmission wheels.
[0014] This utility model has the following beneficial effects:
[0015] 1. This utility model proposes a processing fixture that, through the synergistic action of a first set of transmission wheels and a straightening sleeve, initially straightens the steel bar and holds it within the constraint of the straightening sleeve, thereby making it easier to achieve the straightness requirements in subsequent processing and reducing the risk of subsequent deformation. Through the coordinated operation of cylinders one and two and two sets of motors, a complete cycle from clamping, positioning, cutting to return is achieved, facilitating mass production and automation, and improving capacity and efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall front axle of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall rear axle of this utility model;
[0018] Figure 3 This is a cross-sectional schematic diagram of the base plate, rotating column, transmission wheel and No. 1 rubber pad of this utility model;
[0019] Figure 4 This is an isometric schematic diagram of the clamping plate, cylinder No. 1, movable block and cylinder No. 2 of this utility model;
[0020] Figure 5 This is an isometric view of the motor, transmission wheel, first rubber pad, and gear of this utility model.
[0021] Legend:
[0022] 1. Base plate; 2. Fixing box; 3. Motor; 4. Rotating column; 5. Transmission wheel; 6. Rubber pad No. 1; 7. Gear; 8. Clamping plate; 9. Straightening sleeve; 10. Fixing plate; 11. Guide column; 12. Mounting plate; 13. Cylinder No. 1; 14. Movable block; 15. Cylinder No. 2. Detailed Implementation
[0023] 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.
[0024] Reference Figures 1-5 One embodiment provided by this utility model:
[0025] A machining fixture includes a base plate 1. Fixing boxes 2 are fixedly installed at the upper edge and middle of the base plate 1. Motors 3 are fixedly installed on the upper inner sides of the two fixing boxes 2. Rotary columns 4 are rotatably installed on the inner sides of the two fixing boxes 2 near the middle. Transmission wheels 5 are fixedly installed on the output ends of the two motors 3 and on the other side of the two rotating columns 4. Rubber pads 6 are fixedly fitted onto the outer ends of the four transmission wheels 5. A straightening sleeve 9 is fixedly installed on the upper edge of the base plate 1. A fixing plate 10 is fixedly installed on the other side of the base plate 1. Guide posts 11 are fixedly installed on both the front and rear sides of the fixing plate 10. Mounting plates 12 are fixedly installed on the side of the fixing plate 10 closest to the two guide posts 11. Cylinders 13 are fixedly installed on one side of each of the two mounting plates 12. The other... Movable blocks 14 are fixedly installed on one side. Two cylinders 15 are fixedly installed on opposite sides of the two movable blocks 14. Clamping plates 8 are fixedly installed on opposite sides of the two cylinders 15. Gears 7 are fixedly fitted on the outer side of the output ends of the two motors 3 and on the other side of the outer end of the two rotating columns 4. The four gears 7 mesh with each other in pairs. The four gears 7 are set in pairs and are respectively set in the inner end of the two fixed boxes 2. The straightening sleeve 9 is set on the opposite side of the two fixed boxes 2. The straightening sleeve 9 is set between the four rubber pads 6 in pairs. The two movable blocks 14 are respectively movably set on the outer end of the two guide columns 11. The two clamping plates 8 are movably set above the fixed plate 10. The inner end of the two clamping plates 8 is set with rubber pads 2. The two clamping plates 8 are set at a position away from the multiple transmission wheels 5.
[0026] Specifically, the base plate 1 is used for installation with the equipment. When the steel bar is placed between the first set of transmission wheels 5 at the edge, the gear 7 drives the rotating column 4 to rotate after the motor 3 is started. At this time, the first set of transmission wheels 5 will rotate together in the opposite direction. Since there is a rubber pad 6 at the outer end of the transmission wheel 5, the steel bar will move towards the straightening sleeve 9. The continuous rotation of the first set of transmission wheels 5 will drive the straightening sleeve 9 to straighten the steel bar.
[0027] After the steel bar passes through the inside of the straightening sleeve 9, it will be limited by the second set of transmission wheels 5. At this time, it can be ensured that the steel bar will not bend again. The second set of transmission wheels 5 will drive the steel bar to move towards the fixed plate 10 as it rotates continuously.
[0028] Once the steel bar reaches the appropriate distance, the two motors 3 can be turned off. After starting the second cylinder 15, the steel bar is firmly clamped by the two clamping plates 8. Since the two clamping plates 8 are equipped with second rubber pads, they can accommodate steel bars of different sizes. At this time, starting the first cylinder 13 will cause the movable block 14 to move towards the processing equipment. After the movable block 14 moves to the end of the guide post 11, the processing equipment can quickly cut the steel bar to the required length.
[0029] After a single cut is completed, the piston rod of cylinder 15 needs to retract, the two clamping plates 8 are released, and then cylinder 13 drives the movable block 14 to return to its original position, thereby ensuring that the cutting length is the same.
[0030] It should be noted that both motors 3 can only rotate in one direction and cannot rotate in the opposite direction. This is to prevent the steel bar from deforming if the clamping plate 8 is not released by the second cylinder 15 when the first cylinder 13 is retracted. At the same time, both motors 3 can also rotate in the forward direction after being turned off. At this time, the steel bar can be dragged towards the fixed plate 10 by the back and forth movement of the first cylinder 13 alone.
[0031] The straightening sleeve 9 is an existing technology. Its structure is a high-precision, high-hardness sleeve with a smooth inner hole. It applies an over-constraint to the moving steel bar, forcing its bent part to undergo reverse elastic deformation. After it passes through this constraint, it stabilizes in a straight state by the steel bar itself. At the same time, the straightening sleeve 9 of this device is connected to the base plate 1 by bolts. After changing to steel bars of different sizes, the bolts need to be unscrewed and the straightening sleeve 9 with the corresponding hole diameter needs to be replaced to ensure that this device can adapt.
[0032] Both rubber pad 6 and rubber pad 2 are made of high-friction polyurethane rubber to ensure that the friction between the steel bar and the rubber pad is large enough during processing. The control switches for the two sets of motors 3, the two cylinders 13 and the two cylinders 15 are integrated on the external controller for easy operation.
[0033] Working Principle: The base plate 1 is used for installation with the equipment. The steel bar is placed between the first set of transmission wheels 5 at the edge. After starting the motor 3, the gear 7 drives the rotating column 4 to rotate. At this time, the first set of transmission wheels 5 rotate in opposite directions. The continuous rotation of the first set of transmission wheels 5 drives the straightening sleeve 9 to straighten the steel bar. After the steel bar passes inside the straightening sleeve 9, it is limited by the second set of transmission wheels 5, ensuring that the steel bar will not bend again. The second set of transmission wheels 5, in its continuous rotation, drives the steel bar towards the fixed plate 10. When the steel bar reaches the appropriate distance, both motors 3 can be turned off. After starting the second cylinder 15, the steel bar is firmly clamped by the two clamping plates 8. Since both clamping plates 8 are equipped with second rubber pads, they can accommodate steel bars of different sizes. At this time, starting the first cylinder 13 moves the movable block 14 towards the processing equipment. After the movable block 14 moves to the end of the guide column 11, the processing equipment can quickly cut the steel bar to the required length. After a single cut is completed, the piston rod of cylinder 15 needs to retract, the two clamping plates 8 are released, and then cylinder 13 drives the movable block 14 to return to its original position, thereby ensuring that the cutting length is the same each time.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.
Claims
1. A machining fixture, comprising a base plate (1), characterized in that: A fixing box (2) is fixedly installed at one edge and the middle of the upper end of the base plate (1). A motor (3) is fixedly installed on the upper inner side of the two fixing boxes (2). A rotating column (4) is rotatably installed on the middle inner side of the two fixing boxes (2). A transmission wheel (5) is fixedly installed on the output end of the two motors (3) and the other side of the two rotating columns (4). A rubber pad (6) is fixedly fitted on the outer end of the four transmission wheels (5). A straightening sleeve (9) is fixedly installed on one side of the upper end of the base plate (1) near the edge. A fixing plate (10) is fixedly installed on the other side of the base plate (1). Guide posts (11) are fixedly installed on both the front and rear sides of the fixing plate (10). An installation plate (12) is fixedly installed on the side of the fixing plate (10) near the two guide posts (11). A first cylinder (13) is fixedly installed on one side of each of the two installation plates (12). A movable block (14) is fixedly installed on the other side of each of the two first cylinders (13). A second cylinder (15) is fixedly installed on the opposite side of each of the two movable blocks (14). A clamping plate (8) is fixedly installed on the opposite side of each of the two second cylinders (15).
2. The machining fixture according to claim 1, characterized in that: Gears (7) are fixedly fitted on the outer side of the output end of the two motors (3) and on the other side of the outer end of the two rotating columns (4).
3. The machining fixture according to claim 2, characterized in that: The four gears (7) mesh with each other in pairs, and the four gears (7) are arranged in pairs in the inner ends of the two fixed boxes (2).
4. The machining fixture according to claim 1, characterized in that: The straightening sleeve (9) is set on one side opposite to the two fixing boxes (2), and the straightening sleeve (9) is set between each of the four No. 1 rubber pads (6).
5. The machining fixture according to claim 1, characterized in that: The two movable blocks (14) are respectively movably disposed at the outer ends of the two guide posts (11), and the two clamping plates (8) are movably disposed above the fixed plate (10).
6. The machining fixture according to claim 1, characterized in that: The inner ends of the two clamping plates (8) are provided with second rubber pads, and the two clamping plates (8) are located away from the multiple transmission wheels (5).