Adjustable gear shaft positioning and clamping tool

Abstract

The utility model relates to the technical field of positioning and clamping workpieces, and discloses an adjustable gear shaft positioning and clamping workpiece, which includes an installation table. A connecting plate is fixedly installed on the side surface of the installation table. A rotatable three-jaw chuck is arranged on the side surface of the connecting plate, and three synchronously sliding clamping blocks are arranged on the side surface of the three-jaw chuck. In the utility model, this workpiece realizes high-precision positioning through a two-stage structure of centering and pre-tightening by the conical surface and three-jaw linkage locking. The servo motor drives the mating gear to engage with the rack, pushing the extrusion cone to slide precisely in the installation sleeve, forming a coaxial conical clamping area with the support cone on the electric sliding table. The conical surfaces of the two cones adaptively fit with the center hole at the end of the gear shaft, eliminating the assembly gap. After pre-tightening, the three-jaw chuck is started, and the three clamping blocks move synchronously centripetally under the guidance of the conical surface, evenly wrapping the shaft body. Since the axial pre-tightening has eliminated the eccentricity, there is no radial movement when the clamping block applies force, controlling the radial runout after clamping.

Description

Technical Field

[0001] This utility model relates to the field of positioning and clamping fixture technology, and in particular to an adjustable gear shaft positioning and clamping fixture. Background Technology

[0002] Traditional gear shaft machining fixtures mostly employ a single chuck clamping method or a two-end pin fixing mode, which has significant drawbacks: First, the shaft is prone to eccentricity when clamped by the chuck, resulting in displacement of the machining hole position, especially for long shaft parts where radial runout control is insufficient; second, coolant and metal debris splashing and contaminating the equipment platform requires frequent cleaning and can easily damage precision guideways; third, manual adjustment of the pin stroke is inefficient and has poor preload consistency. Although existing improvement solutions add auxiliary support, they lack a coordinated control mechanism for axial and radial clamping, and the debris collection function is rudimentary, making it difficult to adapt to the needs of high-efficiency automated production lines. Therefore, we propose an adjustable gear shaft positioning and clamping fixture. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the prior art and provide an adjustable gear shaft positioning and clamping fixture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable gear shaft positioning and clamping fixture, comprising a mounting platform, a connecting plate fixedly mounted on the side of the mounting platform, a rotatable three-jaw chuck on the side of the connecting plate, three synchronously sliding clamping blocks on the side of the three-jaw chuck, a guide hole corresponding to the center position of the three-jaw chuck on the side of the connecting plate, a sliding extrusion cone inside the guide hole, a sliding electric slide on the upper side of the mounting platform, a fixed support cone on the upper side of the electric slide, a gear shaft between the extrusion cone and the support cone, a movable collection box above the mounting platform corresponding to the lower part of the gear shaft, the collection box having an open top, a groove on the bottom side of the collection box, and a removable filter screen inside the groove.

[0005] Preferably, the support cone is a conical cylinder, the extrusion cone is a conical cylinder, and the extrusion cone and the support cone are arranged on the same axis.

[0006] Preferably, a slider is slidably mounted on the side of the mounting platform, and a telescopic rod is fixedly mounted on the side of the slider, with the output end of the telescopic rod fixedly mounted on the side of the collection box.

[0007] Preferably, a sliding handle is slidably installed inside the collection box. The sliding handle has a frame structure, and the filter screen is fixedly installed inside the sliding handle.

[0008] Preferably, a mounting plate is fixed to the side of the connecting plate, a servo motor is fixedly mounted on the side of the mounting plate, an adapter gear is fixedly mounted on the output end of the servo motor, and a rack is fixedly mounted on the end face of the extrusion cone at the position corresponding to the extrusion cone, with the rack meshing with the adapter gear.

[0009] Preferably, a fixing block is fixedly installed on the side of the connecting plate, and an mounting sleeve is fixedly installed on the side of the fixing block corresponding to the position of the rack, with the rack slidably installed inside the mounting sleeve.

[0010] Preferably, the slider is an inclined block, and the telescopic rod is fixedly installed on the inclined surface of the slider. Beneficial effects

[0011] This utility model provides an adjustable gear shaft positioning and clamping fixture. It has the following advantages:

[0012] (1) This adjustable gear shaft positioning and clamping fixture achieves high-precision positioning through a two-stage structure of conical surface pre-tightening and three-jaw linkage locking. A servo motor drives the matching gear to mesh with the rack, pushing the extrusion cone to slide precisely within the mounting sleeve, forming a coaxial conical clamping area with the support cone on the electric slide. The conical surfaces of the two cones adaptively fit with the center hole at the gear shaft end, eliminating assembly gaps. After pre-tightening, the three-jaw chuck is activated, and the three clamping blocks move synchronously towards the center under the guidance of the conical surfaces, evenly wrapping the shaft body. Because the axial pre-tightening eliminates eccentricity, there is no radial movement when the clamping blocks apply force, controlling the radial runout after clamping.

[0013] (2) During processing, the adjustable gear shaft positioning and clamping fixture allows the coolant to carry debris along the surface of the gear shaft into the inclined collection box. The filter screen intercepts the metal debris, and the clean liquid flows back to the cooling system through the bottom of the groove to solve the problem of debris contamination. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural diagram of the fixing block of this utility model;

[0018] Figure 3 This is a partial structural diagram of the collection box of this utility model;

[0019] Legend:

[0020] 1. Mounting platform; 2. Connecting plate; 3. Electric slide; 4. Support cone; 5. Mounting plate; 6. Servo motor; 7. Fixing block; 8. Mounting sleeve; 9. Guide hole; 10. Extrusion cone; 11. Rack; 12. Adaptor gear; 13. Three-jaw chuck; 14. Clamping block; 15. Slider; 16. Telescopic rod; 17. Collection box; 18. Groove; 19. Sliding handle; 20. Filter screen. Detailed Implementation

[0021] 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.

[0022] like Figures 1-3As shown, an adjustable gear shaft positioning and clamping fixture includes a mounting platform 1. A connecting plate 2, which is rectangular, is fixedly mounted on the side of the mounting platform 1. A rotatable three-jaw chuck 13 is provided on the side of the connecting plate 2. Three synchronously sliding clamping blocks 14 are provided on the side of the three-jaw chuck 13. A guide hole 9 is provided on the side of the connecting plate 2 corresponding to the center position of the three-jaw chuck 13. A sliding extrusion cone 10 is provided inside the guide hole 9. A sliding electric slide 3 is provided on the upper side of the mounting platform 1. A fixed support cone 4 is provided on the upper side of the electric slide 3. A gear shaft is provided between the extrusion cone 10 and the support cone 4. A movable collection box 17 is provided above the mounting platform 1 and below the gear shaft. The collection box 17 is an open box at the top. A groove 18 is provided on the bottom side of the collection box 17. A removable filter screen 20 is provided inside the groove 18. When in use, adjust the length of the extended extrusion cone 10. The two ends of the gear shaft are squeezed and clamped by the support cone 4 and the extrusion cone 10 to initially fix the gear shaft. Then, the three-jaw chuck 13 uses three clamping blocks 14 to clamp and fix the gear shaft. When drilling the gear shaft, the debris and coolant flow along the gear shaft into the collection box 17. The debris is filtered by the filter screen 20 to prevent the debris from flowing with the coolant to the top of the mounting platform 1, reducing the labor intensity of the operator. The support cone 4 is a conical cylinder, and the extrusion cone 10 is a conical cylinder. The extrusion cone 10 and the support cone 4 are set on the same axis. The gear shaft is initially fixed by the support cone 4 and the extrusion cone 10. During the clamping process, the clamping blocks 14 can apply force evenly on the side of the gear shaft.

[0023] A slider 15 is slidably mounted on the side of the mounting platform 1. A telescopic rod 16 is fixedly mounted on the side of the slider 15. The output end of the telescopic rod 16 is fixedly mounted on the side of the collection box 17. The slider 15 is an inclined block, and the telescopic rod 16 is fixedly mounted on the inclined surface of the slider 15. The telescopic rod 16 drives the collection box 17 to move, facilitating the cleaning of debris inside the collection box 17. A sliding handle 19 is slidably mounted inside the collection box 17. The sliding handle 19 has a frame structure, and the filter screen 20 is fixedly mounted inside the sliding handle 19. The filter screen 20 is brought out of the groove 18 by the sliding handle 19, thus cleaning the inside of the filter screen 20. The debris is dumped. A mounting plate 5 is fixed to the side of the connecting plate 2. A servo motor 6 is fixed to the side of the mounting plate 5. An adapter gear 12 is fixed to the output end of the servo motor 6. A rack 11 is fixed to the end face of the extrusion cone 10 at the position corresponding to the extrusion cone 10. The rack 11 and the adapter gear 12 mesh with each other. The servo motor 6 drives the adapter gear 12 to rotate. The adapter gear 12 meshes with the rack 11 to drive the rack 11 to move laterally. A fixing block 7 is fixed to the side of the connecting plate 2. An installation sleeve 8 is fixed to the side of the fixing block 7 at the position corresponding to the rack 11. The rack 11 is slidably installed inside the installation sleeve 8.

[0024] The working principle of this utility model:

[0025] In use, when this fixture is in operation, the gear shaft is first placed on the support cone 4 of the electric slide table 3. The servo motor 6 is started to drive the adapter gear 12 to rotate. Through meshing transmission with the rack 11, the extrusion cone 10 is pushed to slide precisely along the mounting sleeve 8 towards the guide hole 9 of the connecting plate 2, so that the extrusion cone 10 and the cone surface of the support cone 4 synchronously press against the center holes at both ends of the gear shaft, realizing axial adaptive centering pre-tightening. Subsequently, the three-jaw chuck 13 drives the three clamping blocks 14 to retract synchronously towards the center, evenly clamping the outer surface of the gear shaft, forming a double constraint of "axial cone surface centering + radial three-jaw locking". During the processing, coolant and metal debris flow along the surface of the gear shaft into the inclined collection box 17. After the debris is intercepted by the removable filter screen 20 in the groove 18, the clean liquid flows back to the cooling system. During cleaning, the telescopic rod 16 pushes the collection box 17 outward along the inclined trajectory of the slider 15. The operator holds the frame structure of the sliding handle 19 to pull the filter screen 20 out of the groove 18, realizing the rapid dumping of debris. After resetting, the telescopic rod 16 pulls the collection box 17 back to its original position.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable gear shaft positioning and clamping fixture, comprising a mounting platform (1), wherein a connecting plate (2) is fixedly mounted on the side of the mounting platform (1), characterized in that: The connecting plate (2) is provided with a rotatable three-jaw chuck (13) on its side. The three-jaw chuck (13) is provided with three synchronously sliding clamping blocks (14) on its side. The connecting plate (2) is provided with a guide hole (9) at the center of the three-jaw chuck (13) on its side. A sliding extrusion cone (10) is provided inside the guide hole (9). A sliding electric slide (3) is provided on the upper side of the mounting platform (1). A fixed support cone (4) is provided on the upper side of the electric slide (3). A gear shaft is provided between the extrusion cone (10) and the support cone (4). A movable collection box (17) is provided above the mounting platform (1) and below the gear shaft. The collection box (17) is an open box at the top. A groove (18) is provided on the bottom side of the collection box (17). A removable filter screen (20) is provided inside the groove (18).

2. The adjustable gear shaft positioning and clamping fixture according to claim 1, characterized in that: The support cone (4) is a conical cylinder, and the extrusion cone (10) is a conical cylinder. The extrusion cone (10) and the support cone (4) are arranged on the same axis.

3. The adjustable gear shaft positioning and clamping fixture according to claim 1, characterized in that: A slider (15) is slidably mounted on the side of the mounting platform (1), and a telescopic rod (16) is fixedly mounted on the side of the slider (15). The output end of the telescopic rod (16) is fixedly mounted on the side of the collection box (17).

4. The adjustable gear shaft positioning and clamping fixture according to claim 1, characterized in that: The collection box (17) has a sliding handle (19) that is slidably installed inside. The sliding handle (19) has a frame structure, and the filter screen (20) is fixedly installed inside the sliding handle (19).

5. The adjustable gear shaft positioning and clamping fixture according to claim 1, characterized in that: The side of the connecting plate (2) is fixed with a mounting plate (5), the side of the mounting plate (5) is fixed with a servo motor (6), the output end of the servo motor (6) is fixed with an adapter gear (12), the end face of the extrusion cone (10) is fixed with a rack (11) corresponding to the position of the extrusion cone (10), and the rack (11) meshes with the adapter gear (12).

6. The adjustable gear shaft positioning and clamping fixture according to claim 5, characterized in that: A fixing block (7) is fixedly installed on the side of the connecting plate (2), and an mounting sleeve (8) is fixedly installed on the side of the fixing block (7) corresponding to the position of the rack (11). The rack (11) is slidably installed inside the mounting sleeve (8).

7. The adjustable gear shaft positioning and clamping fixture according to claim 3, characterized in that: The slider (15) is an inclined block, and the telescopic rod (16) is fixedly installed on the inclined surface of the slider (15).

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