Universal adjustable power head

Abstract

The utility model discloses a universal adjustable power head which comprises an input shaft seat, a middle transmission seat, an output shaft seat, an input shaft, a middle shaft, an output shaft and bevel gear pairs arranged between the input shaft and the middle shaft and between the middle shaft and the output shaft. A mounting hole is formed in the middle transmission seat, a locking block is correspondingly arranged in the middle transmission seat, the locking block is connected with the output shaft seat through a bolt and axially presses the middle transmission seat and the output shaft seat to realize rotation stopping and limiting, and a circle of limiting teeth are arranged on the peripheral wall of the locking block; at least one radial rotation stopping assembly is arranged at the position, corresponding to the limiting teeth, of the mounting hole, each radial rotation stopping assembly comprises a radial through hole formed in the inner wall of the mounting hole and a pushing rod in threaded connection with the interior of the radial through hole, and the inner end of the pushing rod at least indirectly abuts against the limiting teeth in the radial direction. According to the structure, angle locking is reliable, axial pressing locking and radial abutting rotation stopping are achieved, locking is reliable and stable, and slipping and disengaging are not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the field of machine tool accessories technology, and in particular to a universal adjustable power head. Background Technology

[0002] As a core component of mechanical transmission systems, the power head is widely used in various industrial equipment requiring power transmission and direction adjustment, such as machine tools, construction machinery, and automated production lines. With the continuous improvement of industrial automation, the performance requirements for power heads are also increasing. Modern industrial applications not only require power heads to have reliable power transmission capabilities but also demand that they achieve rapid adjustment of the output direction and precise positioning. Especially in high-end equipment such as five-axis machining centers and robot joints, the universal adjustment capability of the power head directly affects the machining accuracy and motion flexibility of the equipment.

[0003] Existing universal power head structures typically include an input shaft seat, an intermediate transmission seat, an output shaft seat, an input shaft, an intermediate shaft, and an output shaft. The output shaft seat is rotatably mounted on the intermediate transmission seat and is used to adjust the rotation direction of the output shaft seat. The input shaft and the intermediate shaft, and the intermediate shaft and the output shaft are sequentially connected by bevel gear pairs. After the rotation angle is adjusted, the intermediate transmission seat and the output shaft seat are axially pressed together by tightening a locking block with bolts, relying on end-face friction to form a stop and limit the rotation. However, this structure has problems such as insufficient positioning accuracy and poor locking reliability. It is prone to displacement under vibration or impact loads, affecting machining accuracy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a universal adjustable power head with reliable angle locking.

[0005] The technical solution of this utility model is:

[0006] The universal adjustable power head of this utility model includes an input shaft seat, an intermediate transmission seat, an output shaft seat, an input shaft, an intermediate shaft, an output shaft, and a bevel gear pair disposed between the input shaft and the intermediate shaft, and between the intermediate shaft and the output shaft. The output shaft seat is rotatably mounted on the intermediate transmission seat. The intermediate transmission seat has a mounting hole and a corresponding locking block. The locking block is connected to the output shaft seat by bolts and axially presses against the intermediate transmission seat and the output shaft seat to achieve anti-rotation and limiting. Its characteristic is:

[0007] The outer peripheral wall of the locking block has a ring of limiting teeth; at least one set of radial anti-rotation components is provided at the position of the limiting teeth corresponding to the mounting hole. Each set of radial anti-rotation components includes a radial through hole provided on the inner wall of the mounting hole and a push rod threaded in the radial through hole. The inner end of the push rod at least indirectly abuts against the limiting teeth radially.

[0008] This structure adds a radial anti-rotation component to the traditional axial clamping locking structure. The two locking methods complement each other, ensuring that slippage and disengagement will not occur under any working conditions, thus guaranteeing the reliability and stability of the angle locking.

[0009] Furthermore, in the universal adjustable power head described in this utility model, a ball bearing is provided between the push rod and the limiting tooth, and the push rod pushes the ball bearing into contact with the limiting tooth. Relying on the ball bearing for support, the processing and assembly complexity is low, and the rolling action reduces wear, extends service life, and facilitates maintenance.

[0010] Furthermore, in the universal adjustable power head described in this utility model, the intermediate shaft is hollow, and a flip shaft protrudes from one side of the output shaft seat. The flip shaft is inserted into the intermediate shaft and the two are rotatably connected by a bearing.

[0011] Furthermore, in the universal adjustable power head described in this utility model, the inner end of the push rod is circumferentially rotatable and axially fixed with an arc-shaped anti-rotation plate, the center of the arc of the anti-rotation plate being concentric with the center of the limiting tooth; one side of the anti-rotation plate is provided with an anti-rotation tooth that meshes with the limiting tooth, and the other side is provided with a sliding guide post, the inner wall of the mounting hole is provided with a corresponding guide hole, and the sliding guide post is inserted into the guide hole and can slide along the guide hole. Utilizing the tooth meshing method, the locking is more reliable, the impact resistance is good, the positioning is accurate, and it is not easy to loosen.

[0012] Furthermore, in the universal adjustable power head described in this utility model, an elastic element is also pressed between the radial through hole and the anti-rotation plate.

[0013] Furthermore, in the universal adjustable power head described in this utility model, the elastic element is a disc spring or a compression spring.

[0014] Furthermore, in the universal adjustable power head described in this utility model, there are at least two sets of radial anti-rotation components, which are evenly distributed around the center of the limiting tooth to achieve multi-point anti-rotation and improve anti-rotation reliability.

[0015] Furthermore, in the universal adjustable power head described in this utility model, an axial positioning pin is also provided between the locking block and the output shaft seat.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model has a power head output angle adjustment function and reliable angle locking. On the basis of axial compression locking, a radial anti-rotation component is added to improve the locking reliability and prevent slippage and disengagement.

[0018] 2. This utility model has various radial anti-rotation methods. It relies on the radial support of the balls, which has a simple and compact structure, low cost, and the contact point of the balls can be finely adjusted to compensate for assembly errors, reduce dependence on machining accuracy, and have a long service life. It relies on the anti-rotation teeth of the anti-rotation plate to engage and lock, which has high angular positioning accuracy, stronger engagement reliability, and greater locking force. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of Example 1. Figure 1 .

[0020] Figure 2 This is a cross-sectional view of Example 1. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the structure of Example 2.

[0022] Figure 4 for Figure 3 A magnified view of a portion of the image. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings: Example 1

[0024] Reference Figure 1 , Figure 2 As shown, the universal adjustable power head described in this embodiment includes an input shaft seat 1, an intermediate transmission seat 2, an output shaft seat 3, an input shaft, an intermediate shaft 4, an output shaft, and a bevel gear pair sequentially disposed between the input shaft and the intermediate shaft 4, and between the intermediate shaft 4 and the output shaft. The output shaft seat 3 is rotatably mounted on the intermediate transmission seat 2. The intermediate transmission seat 2 has a mounting hole 5 and a corresponding locking block 6. The locking block 6 is connected to the output shaft seat 3 by bolts and axially presses the intermediate transmission seat 2 and the output shaft seat 3 to achieve anti-rotation and limiting. An axial positioning pin is also provided between the locking block 6 and the output shaft seat 3.

[0025] The outer peripheral wall of the locking block 6 has a ring of limiting teeth 6a; the mounting hole 5 is provided with at least one set of radial anti-rotation components at the position corresponding to the limiting teeth 6a. Each set of radial anti-rotation components includes a radial through hole 7 provided on the inner wall of the mounting hole 5 and a push rod 8 threadedly connected in the radial through hole 7. A ball 9 is provided between the push rod 8 and the limiting teeth 6a. The inner end of the push rod 8 pushes the ball 9 radially to abut against the limiting teeth 6a.

[0026] Work process description:

[0027] When the output shaft seat 3 needs to be rotated to adjust its angle, loosen the bolts on the push rod 8 and the locking block 6 to make the output shaft seat 3 and the intermediate transmission seat 2 loose and rotatable. After the output shaft seat 3 is rotated to its position, tighten the bolts to achieve axial clamping and limiting, and tighten the push rod 8 to control the ball bearing 9 to radially press against the limiting tooth 6a, thereby achieving frictional anti-rotation and preventing the output shaft seat 3 from rotating unexpectedly.

[0028] The radial anti-rotation structure of this embodiment is simple and compact. The ball 9 directly abuts against the tooth surface, eliminating the need for a complex transmission locking mechanism and providing rolling contact, which reduces wear and extends the service life of the limiting tooth 6a and the ball 9. The ball 9 can be finely adjusted to compensate for assembly errors and reduce dependence on machining accuracy.

[0029] To enhance the stability of the anti-rotation support, a compression spring (not shown in the figure) can be connected between the push rod 8 and the ball 9 to provide preload force, thereby preventing slippage caused by insufficient pressure between the ball 9 and the tooth surface and improving reliability. Example 2

[0030] Reference Figure 3 and Figure 4 In this embodiment, the inner end of the push rod 8 is circumferentially rotatable and axially fixed with an arc-shaped anti-rotation plate 10. The center of the arc of the anti-rotation plate 10 is concentric with the center of the limiting tooth 6a. One side of the anti-rotation plate 10 is provided with an anti-rotation tooth that meshes with the limiting tooth 6a, and the other side is provided with a sliding guide post 11. The inner wall of the mounting hole 5 is provided with a corresponding guide hole. The sliding guide post 11 is inserted into the guide hole and can slide along the guide hole. Only one set of radial anti-rotation components is shown in the figure. Of course, multiple sets can be provided, evenly distributed around the center of the limiting tooth 6a.

[0031] To enhance the meshing reliability between the anti-rotation plate 10 and the limiting tooth 6a, this embodiment also considers adding an elastic pre-tightening structure. An elastic element 12 is also pressed between the radial through hole 7 and the anti-rotation plate 10. Specifically, the elastic element 12 is a disc spring or a compression spring, which presses the limiting tooth 6a tightly with elastic force.

[0032] In this embodiment, the anti-rotation plate 10 is guided by the sliding guide post 11 and pushed by the push rod 8 to ensure that it slides radially and ensures that the anti-rotation tooth and the limiting tooth 6a are precisely engaged, providing rigid locking, strong anti-torsion ability, suitable for high-precision angle positioning application scenarios, and the meshing tooth surface is large, making it less likely to be accidentally disengaged due to vibration, thus providing higher safety performance.

[0033] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A universal adjustable power head, comprising an input shaft seat, an intermediate transmission seat, an output shaft seat, an input shaft, an intermediate shaft, an output shaft and a bevel gear pair arranged between the input shaft and the intermediate shaft and between the intermediate shaft and the output shaft, the output shaft seat being rotatably arranged on the intermediate transmission seat, the intermediate transmission seat being provided with a mounting hole and a locking block corresponding to the mounting hole, the locking block being connected to the output shaft seat by a bolt and axially pressing the intermediate transmission seat and the output shaft seat to achieve rotation-stopping limiting, characterized in that: the locking block is provided with a ring of limiting teeth on the outer peripheral wall thereof; the mounting hole is provided with at least one set of radial rotation-stopping assemblies corresponding to the position of the limiting teeth, each set of radial rotation-stopping assemblies comprising a radial through hole arranged on the inner wall of the mounting hole and a push rod threadedly connected in the radial through hole, the inner end of the push rod being at least indirectly radially abutted on the limiting teeth. A ball is arranged between the push rod and the limiting teeth, and the push rod pushes the ball into abutting contact with the limiting teeth.

2. The gimbal adjustable powerhead of claim 1, wherein: The intermediate shaft is hollow, one side surface of the output shaft seat is provided with a turnover shaft, the turnover shaft is inserted into the intermediate shaft and the two are rotatably connected through a bearing.

3. The gimbal adjustable powerhead of claim 1, wherein: The inner end of the push rod is circumferentially rotatably and axially fixedly provided with an arc-shaped rotation-stopping plate, the center of the arc of the rotation-stopping plate is concentric with the center of the limiting teeth; one side of the rotation-stopping plate is provided with rotation-stopping teeth engaged with the limiting teeth, and the other side is provided with a sliding guide column, the inner wall of the mounting hole is provided with a guide hole corresponding thereto, and the sliding guide column is inserted into the guide hole and can slide along the guide hole.

4. The gimbal adjustable powerhead of claim 1, wherein: An elastic member is further arranged between the radial through hole and the rotation-stopping plate.

5. The gimbal adjustable powerhead of claim 4, wherein: The elastic member is a disc spring or a compression spring.

6. The gimbal adjustable powerhead of claim 5, wherein: The radial rotation-stopping assemblies are at least two sets and are uniformly distributed around the center of the limiting teeth.

7. The gimbal adjustable powerhead of claim 1, wherein: An axial positioning pin is further arranged between the locking block and the output shaft seat.

8. The gimbal adjustable powerhead of claim 1, wherein: ​

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