Positioning device for spline machining

Abstract

The utility model relates to spline shaft processing technical field, concretely is a kind of positioning device for spline machining, including connecting seat, connecting seat is fixedly connected with connecting shell by bolt, the inside rotation of connecting shell is connected with scroll disc, adjusting piece is rotatably connected between connecting seat and connecting shell, fixed mechanism is slidably connected on connecting shell, fixed mechanism is transmission connection with adjusting piece by scroll disc;Fixed mechanism includes transmission seat, the top of transmission seat is slidably connected with moving seat, the top of moving seat is provided with fixed seat, and one side of fixed seat is provided with contact plate.Automatic clamping and fixing of spline shaft can be carried out according to the different radius of spline shaft during use, the deviation of the radius of eccentric spline shaft at different positions is avoided, the uneven force of clamping point is avoided, the subsequent machining precision is ensured, and the fixed spline shaft is prevented from slipping by the anti-slip pad.

Description

Technical Field

[0001] This utility model relates to the field of spline shaft machining technology, and in particular to a positioning device for spline machining. Background Technology

[0002] A splined shaft is a core type of transmission component. Its outer surface features multiple axial key teeth evenly distributed, integrally formed with the shaft body, unlike the separate structure of a conventional flat key. Compared to traditional flat keys, it has a larger contact area, stronger load-bearing capacity, and higher centering accuracy, effectively preventing radial runout during transmission and resulting in superior transmission stability. Common types include rectangular splines and involute splines: rectangular splines are easier to machine and are often used in low-to-medium speed, medium-load applications; involute splines distribute stress evenly and are suitable for high-speed, heavy-load conditions. Widely used in automotive gearboxes, machine tool spindles, and engineering machinery reducers, it achieves reliable torque and motion transmission through precise meshing with spline holes, making it a key component ensuring the efficient and stable operation of mechanical systems.

[0003] Positioning during spline shaft machining is crucial for ensuring machining accuracy and quality. It allows machined components such as the key teeth to be precisely distributed around the axis, preventing eccentricity and asymmetry, and guaranteeing centering precision. Simultaneously, it standardizes the machining datum, reducing the accumulation of errors from multiple processes such as turning and milling, ensuring consistent key tooth dimensions and depth. Ultimately, it allows the spline shaft to precisely mesh with the spline holes, guaranteeing stable transmission and reliable load-bearing capacity. Positioning devices are essential during the machining of spline shafts.

[0004] A positioning device for manufacturing splined shafts, disclosed in Chinese patent CN219725917U, can stably clamp splined shafts of different heights. However, compared with existing technologies and comparative solutions, this positioning device still has the following problems in actual use:

[0005] This positioning device, compared to existing positioning devices such as three-jaw chucks, uses a slider that moves radially synchronously via a second screw while maintaining a fixed clamping center when positioning a splined shaft. This method is only suitable for cylindrical splined shafts within a specific radius range. If the workpiece is a stepped splined shaft with varying radii across different sections, or an eccentric splined shaft with radius deviations at different locations, different clamping blocks cannot simultaneously conform to the workpiece surface, resulting in uneven force distribution at the clamping points. During splined shaft machining, clamping blocks that are not fully conforming to the workpiece surface are prone to loosening, affecting machining accuracy. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a positioning device for spline processing.

[0007] The purpose of this utility model is achieved through the following technical solution: a positioning device for spline machining, including a connecting seat, a connecting shell fixedly connected to the connecting seat by bolts, a scroll plate rotatably connected inside the connecting shell, an adjusting component rotatably connected between the connecting seat and the connecting shell, and a fixing mechanism slidably connected to the connecting shell, the fixing mechanism being drivenly connected to the adjusting component through the scroll plate.

[0008] The fixing mechanism includes a transmission seat, a movable seat slidably connected to the top of the transmission seat, a fixed seat on the top of the movable seat, and a contact plate on one side of the fixed seat.

[0009] The transmission seat has a first slide groove, and an adjusting bolt is rotatably connected inside the first slide groove. A rotating seat is fixedly connected to one side of the first slide groove.

[0010] A connecting block is fixedly connected to the bottom of the movable base, and a fourth connecting screw hole is provided on the connecting block;

[0011] The contact plate has a second sliding groove, a sliding rod is fixedly connected inside the second sliding groove, a slider is slidably connected inside the second sliding groove, an elastic element is provided between the slider and the contact plate, a rotating shaft is fixedly connected to the slider, a limit block is fixedly connected to the end of the rotating shaft away from the slider, and an anti-slip pad is provided on one side of the contact plate.

[0012] Preferably, there are two contact plates, symmetrically distributed on one side of the fixed base, and the two contact plates are hinged to each other.

[0013] Preferably, the connecting shell has a connecting groove, and the transmission seat is slidably connected to the connecting shell through the connecting groove. The bottom of the transmission seat is provided with an adapter tooth, which meshes with the scroll plate. The transmission seat is connected to the adjusting component through the scroll plate.

[0014] Preferably, the movable seat is slidably connected to the transmission seat via the first sliding groove. The movable seat is provided with a first connecting screw hole, a second connecting screw hole and a third connecting screw hole. The connecting block is threadedly connected to the adjusting bolt via the fourth connecting screw hole.

[0015] Preferably, the fixed seat is provided with a step, and a tightening bolt is provided in the middle of the fixed seat. The tightening bolt is threaded to the movable seat through the first connecting screw hole. A rotating part is provided between the tightening bolt and the fixed seat. The tightening bolt is rotatably connected to the middle of the fixed seat through the rotating part. A fixing bolt is provided on the fixed seat. The second connecting screw hole and the third connecting screw hole are both adapted to the fixing bolt.

[0016] Preferably, the slider is rotatably connected to one side of the fixed base via a rotating shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This positioning device for spline machining can adaptively clamp and fix the spline shaft according to its radius, avoiding uneven force on the clamping points and loosening caused by the radius deviation at different positions of the eccentric spline shaft. This ensures the subsequent machining accuracy. At the same time, the anti-slip pad plays a role in preventing the spline shaft from slipping.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention in its first state;

[0022] Figure 2 This is a schematic diagram of the structure of the second state of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0024] Figure 4 This is a first-view structural schematic diagram of the fixing mechanism of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the fixing mechanism of this utility model from a second perspective;

[0026] Figure 6 This is a cross-sectional structural diagram of the fixing mechanism of this utility model;

[0027] Figure 7 This is a schematic diagram of the disassembled structure of the fixing mechanism of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the transmission seat of this utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the movable base of this utility model;

[0030] Figure 10 This is a schematic diagram of the structure of the fixing base of this utility model;

[0031] Figure 11 This is a schematic diagram of the contact plate of this utility model;

[0032] Figure 12 This utility model Figure 11 A magnified schematic diagram of the structure at point A in the middle.

[0033] In the diagram: 1. Connecting seat; 2. Connecting shell; 3. Scroll plate; 4. Adjusting component; 5. Fixing mechanism; 51. Transmission seat; 511. Adaptor gear; 512. First slide groove; 513. Adjusting bolt; 514. Rotating seat; 52. Moving seat; 521. First connecting screw hole; 522. Second connecting screw hole; 523. Third connecting screw hole; 524. Connecting block; 525. Fourth connecting screw hole; 53. Fixing seat; 531. Step; 532. Tightening bolt; 533. Rotating component; 534. Fixing bolt; 54. Contact plate; 541. Second slide groove; 542. Slide rod; 543. Slider; 544. Elastic component; 545. Rotating shaft; 546. Limiting block; 547. Anti-slip pad. Detailed Implementation

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0035] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0036] like Figures 1 to 3 As shown, a positioning device for spline machining includes a connecting seat 1, a connecting shell 2 fixedly connected to the connecting seat 1 by bolts, a scroll plate 3 rotatably connected inside the connecting shell 2, an adjusting member 4 rotatably connected between the connecting seat 1 and the connecting shell 2, and a fixing mechanism 5 slidably connected to the connecting shell 2. The fixing mechanism 5 is connected to the adjusting member 4 through the scroll plate 3.

[0037] like Figures 4 to 7 As shown, the fixing mechanism 5 includes a transmission seat 51, a movable seat 52, a fixed seat 53 and a contact plate 54. The top of the transmission seat 51 is slidably connected to the movable seat 52. The top of the movable seat 52 is provided with the fixed seat 53. The fixed seat 53 is provided on one side of the fixed seat 53. There are two contact plates 54, which are symmetrically distributed on one side of the fixed seat 53. The two contact plates 54 are hinged to each other.

[0038] like Figure 1 , Figure 3 and Figure 8As shown, a connecting groove is provided on the connecting shell 2, and the transmission seat 51 is slidably connected to the connecting shell 2 through the connecting groove. The bottom of the transmission seat 51 is provided with an adapter tooth 511, which meshes with the scroll plate 3. The transmission seat 51 is connected to the adjusting component 4 through the scroll plate 3. A first sliding groove 512 is provided on the transmission seat 51, and an adjusting bolt 513 is rotatably connected inside the first sliding groove 512. A rotating seat 514 is fixedly connected to one side of the first sliding groove 512. The rotating seat 514 is fixedly connected to one side of the first sliding groove 512 by bolts, and the adjusting bolt 513 is rotatably connected to the rotating seat 514.

[0039] like Figure 6 and Figure 9 As shown, the movable seat 52 is slidably connected to the transmission seat 51 via the first sliding groove 512. The movable seat 52 is provided with a first connecting screw hole 521, a second connecting screw hole 522 and a third connecting screw hole 523. A connecting block 524 is fixedly connected to the bottom of the movable seat 52. A fourth connecting screw hole 525 is provided on the connecting block 524. The connecting block 524 is threadedly connected to the adjusting bolt 513 via the fourth connecting screw hole 525.

[0040] like Figure 6 and Figure 10 As shown, a step 531 is provided on the fixed base 53, and a tightening bolt 532 is provided in the middle of the fixed base 53. The tightening bolt 532 is threadedly connected to the movable base 52 through the first connecting screw hole 521. A rotating part 533 is provided between the tightening bolt 532 and the fixed base 53. The tightening bolt 532 is rotatably connected to the middle of the fixed base 53 through the rotating part 533. A fixing bolt 534 is provided on the fixed base 53. The second connecting screw hole 522 and the third connecting screw hole 523 are both adapted to the fixing bolt 534.

[0041] like Figure 4 , Figure 7 , Figure 11 and Figure 12 As shown, a second slide groove 541 is provided on the contact plate 54. A slide rod 542 is fixedly connected inside the second slide groove 541. A slider 543 is slidably connected inside the second slide groove 541. An elastic element 544 is provided between the slider 543 and the contact plate 54. A rotating shaft 545 is fixedly connected to the slider 543. The slider 543 is rotatably connected to one side of the fixed seat 53 through the rotating shaft 545. A limit block 546 is fixedly connected to the end of the rotating shaft 545 away from the slider 543. An anti-slip pad 547 is provided on one side of the contact plate 54.

[0042] All electronic components mentioned in this article are electrically connected to an external main controller and 220V AC mains power. The main controller can be a conventional, known device such as a computer. The electronic components, along with their associated control systems, power supply modules, circuits, and piping, can be provided by the manufacturer. Furthermore, all electronic components and control modules involved in this invention are existing technologies, fully capable of being implemented by those skilled in the art, and require no further explanation. This invention does not involve any improvement to the structure or usage of the electronic components.

[0043] The work process is as follows:

[0044] S1. When positioning a spline shaft with a relatively small radius, the adjusting component 4 drives the scroll plate 3 to rotate, and the scroll plate 3 drives the fixing mechanism 5 to move, thereby positioning the spline shaft with a relatively small radius.

[0045] S2. When positioning a spline shaft with a relatively large radius, rotate the adjusting bolt 513. The adjusting bolt 513 drives the moving seat 52 to move on the transmission seat 51 through the connecting block 524. The moving seat 52 drives the contact plate 54 to move through the fixed seat 53, thereby adjusting the position of the fixed seat 53 and the contact plate 54.

[0046] S3. Then, the adjusting component 4 drives the scroll plate 3 to rotate, and the scroll plate 3 drives the fixing mechanism 5 to move, thereby positioning the spline shaft with a relatively large radius.

[0047] S4. When positioning the stepped spline shaft, loosen the loosening bolt 532 and the fixing bolt 534, and then rotate the fixing seat 53 180 degrees on the moving seat 52 so that the step 531 on the fixing seat 53 is aligned with the stepped spline shaft.

[0048] S5. Then, the adjusting component 4 drives the scroll plate 3 to rotate, and the scroll plate 3 drives the fixing mechanism 5 to move. The step 531 on the fixing seat 53 can fix the stepped spline shaft. When positioning the eccentric spline shaft, the position of the moving seat 52 on the fixing mechanism 5 can be adjusted according to the different radii of the eccentric spline shaft at different positions, so as to adapt to different eccentric spline shafts.

[0049] S6. When the contact plate 54 contacts the surface of the spline shaft, the rotating shaft 545 rotates on the fixed seat 53, and the slider 543 slides in the second slide groove 541, so that the two contact plates 54 form an angle. This allows the spline shaft to be adaptively clamped and fixed according to the different radii of the spline shaft, avoiding the situation where the clamping point is loosened due to the deviation of the radius at different positions of the eccentric spline shaft. This ensures the subsequent machining accuracy. At the same time, the anti-slip pad 547 plays an anti-slip role in fixing the spline shaft.

[0050] 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 claimed utility model.

Claims

1. A positioning device for spline machining, characterized in that: Includes a connecting seat (1), on which a connecting shell (2) is fixedly connected by bolts, and a scroll plate (3) is rotatably connected inside the connecting shell (2). An adjusting member (4) is rotatably connected between the connecting seat (1) and the connecting shell (2). A fixing mechanism (5) is slidably connected on the connecting shell (2). The fixing mechanism (5) is connected to the adjusting member (4) through the scroll plate (3). The fixing mechanism (5) includes a transmission seat (51), a movable seat (52) is slidably connected to the top of the transmission seat (51), a fixed seat (53) is provided on the top of the movable seat (52), and a contact plate (54) is provided on one side of the fixed seat (53). The transmission seat (51) is provided with a first slide groove (512), and an adjusting bolt (513) is rotatably connected inside the first slide groove (512). A rotating seat (514) is fixedly connected to one side of the first slide groove (512). The bottom of the movable base (52) is fixedly connected to a connecting block (524), and a fourth connecting screw hole (525) is provided on the connecting block (524); The contact plate (54) is provided with a second sliding groove (541), a sliding rod (542) is fixedly connected inside the second sliding groove (541), a slider (543) is slidably connected inside the second sliding groove (541), an elastic element (544) is provided between the slider (543) and the contact plate (54), a rotating shaft (545) is fixedly connected to the slider (543), a limit block (546) is fixedly connected to one end of the rotating shaft (545) away from the slider (543), and an anti-slip pad (547) is provided on one side of the contact plate (54).

2. The positioning device for spline machining according to claim 1, characterized in that: There are two contact plates (54), which are symmetrically distributed on one side of the fixed base (53) and are hinged to each other.

3. The positioning device for spline machining according to claim 1, characterized in that: The connecting shell (2) is provided with a connecting groove, and the transmission seat (51) is slidably connected to the connecting shell (2) through the connecting groove. The bottom of the transmission seat (51) is provided with an adapter tooth (511), which meshes with the scroll plate (3). The transmission seat (51) is connected to the adjusting member (4) through the scroll plate (3).

4. The positioning device for spline machining according to claim 1, characterized in that: The movable seat (52) is slidably connected to the transmission seat (51) through the first slide groove (512). The movable seat (52) is provided with a first connecting screw hole (521), a second connecting screw hole (522) and a third connecting screw hole (523). The connecting block (524) is threadedly connected to the adjusting bolt (513) through the fourth connecting screw hole (525).

5. A positioning device for spline machining according to claim 4, characterized in that: The fixed base (53) is provided with a step (531), and a tightening bolt (532) is provided in the middle of the fixed base (53). The tightening bolt (532) is threadedly connected to the movable base (52) through the first connecting screw hole (521). A rotating part (533) is provided between the tightening bolt (532) and the fixed base (53). The tightening bolt (532) is rotatably connected to the middle of the fixed base (53) through the rotating part (533). A fixing bolt (534) is provided on the fixed base (53). The second connecting screw hole (522) and the third connecting screw hole (523) are both adapted to the fixing bolt (534).

6. The positioning device for spline machining according to claim 1, characterized in that: The slider (543) is rotatably connected to one side of the fixed base (53) via the rotating shaft (545).

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