A propeller punching positioning device

Abstract

The utility model relates to propeller positioning technical field, concretely relates to a propeller punching positioning device. Including work table, the upper side wall fixed mounting of work table has the axle rod, the circumferential side wall on axle rod annular array fixed mounting has a plurality of bracket, the upper of bracket is provided with a plurality of inner struts. The utility model, through electric telescopic link drive sliding sleeve up and down movement, sliding sleeve in the process of up, can through the upper connecting rod synchronous all inner struts horizontal outward movement to the inner wall of propeller hub central hole closely and tightly, at the same time sliding sleeve through the lower connecting rod synchronous all rotary arm upward rotation, drive the clamping block to the center, the common clamping propeller hub's outer side wall, thereby through a drive source realized to propeller's inner support fixed and external clamping synchronous linkage, enhanced the rigidity and reliability of positioning, improved the precision and quality of punching processing.

Description

Technical Field

[0001] This utility model relates to the field of propeller positioning technology, and more specifically, to a propeller drilling and positioning device. Background Technology

[0002] The propeller is the core component of a ship's propulsion system. It usually consists of a hub and several blades. The central hole of the hub is used to assemble with the propulsion shaft, and bolt holes are opened in the surrounding area of ​​the hole to achieve a fastening connection. In order to ensure assembly accuracy and smooth operation, the position of the bolt holes must be highly accurate. Therefore, the propeller needs to be precisely positioned and fixed before processing.

[0003] In the existing technology, for small propellers, a single positioning method is usually used, such as supporting from the inside with a mandrel or clamping from the outside with a chuck. This single fixing method has the following drawbacks: internal support is difficult to restrain the radial runout of the upper part of the hub, while external clamping is prone to slight deformation of the hub due to uneven clamping force. Moreover, neither method can completely eliminate the risk of vibration and displacement during the processing.

[0004] Furthermore, if the internal support and external clamping are performed in steps, not only is the operation cumbersome and the positioning efficiency low, but the cumulative error caused by multiple clamping will also affect the machining quality of the bolt holes and the dynamic balance performance of the propeller. Summary of the Invention

[0005] The purpose of this invention is to provide a propeller drilling and positioning device to solve the problems mentioned in the background art.

[0006] To address the above problems, this utility model aims to provide a propeller drilling and positioning device, including a worktable. A shaft is fixedly installed on the upper side wall of the worktable. Several brackets are fixedly installed in a ring array on the circumferential side wall of the shaft. Several inner support plates are arranged above the brackets. All inner support plates are arranged in a ring array around the shaft axis. Several rotating arms are hinged in a ring array at the bottom of the circumferential side wall of the shaft. A clamping block is fixedly connected to the other end of each rotating arm. The clamping block is located on the side of the inner support plate away from the shaft axis. A displacement mechanism is provided on the shaft. The displacement mechanism is used to drive all inner support plates to synchronously approach or move away from the shaft axis in the horizontal direction, and simultaneously drive all rotating arms to synchronously rotate around their hinge points. When the displacement mechanism drives the inner support plates away from the shaft axis, it synchronously drives the rotating arms to rotate, causing the clamping block to retract towards the shaft axis.

[0007] As a further improvement to this technical solution, the displacement mechanism includes a sliding sleeve that is slidably sleeved on the shaft. The bottom of the sliding sleeve is hinged to an inclined lower connecting rod at a position corresponding to each rotating arm. The other end of the lower connecting rod is hinged to the corresponding rotating arm.

[0008] As a further improvement to this technical solution, two inclined hinge rods are hinged between the inner support plate and the shaft rod, and the two hinge rods are parallel to each other.

[0009] As a further improvement to this technical solution, an inclined upper connecting rod is hinged to the top of the sliding sleeve at a position corresponding to each inner support plate, and the other end of the upper connecting rod is hinged to the side of the corresponding inner support plate near the shaft.

[0010] As a further improvement to this technical solution, a movable groove is coaxially provided at the bottom of the shaft, and two through grooves are symmetrically provided at the center of the inner wall of the movable groove, with the other end of the through groove extending through to the outer circumference of the shaft.

[0011] As a further improvement to this technical solution, the displacement mechanism also includes an electric telescopic rod fixedly installed at the bottom of the worktable. The upper end of the push rod of the electric telescopic rod slides through the worktable and is coaxially fixedly connected to an extension rod. The extension rod is slidably installed inside the movable groove.

[0012] As a further improvement to this technical solution, a slot is provided on the extension rod at the position corresponding to the two through slots, and a block is fixedly installed on the inner wall of the sliding sleeve at the position corresponding to the two slots. The other end of the block passes through the through slot and is inserted into the corresponding slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This propeller drilling and positioning device uses an electric telescopic rod to drive the sliding sleeve to move up and down. During the upward movement of the sliding sleeve, it can simultaneously push all the inner support plates to move horizontally outward through the upper connecting rod, thereby tightly adhering to and supporting the inner wall of the central hole of the propeller hub. At the same time, the sliding sleeve pulls all the rotating arms upward through the lower connecting rod, causing the clamping blocks to retract towards the center and jointly clamp the outer wall of the propeller hub. Thus, a single driving source achieves synchronous linkage between the inner support fixing and the external clamping of the propeller, enhancing the rigidity and reliability of the positioning and improving the accuracy and quality of the drilling process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall device of this utility model after being combined with the propeller; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a cross-sectional view of the overall structure of this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 This is a partial structural schematic diagram of the present invention; Figure 6 This is an exploded view of part of the structure of this utility model.

[0015] The meanings of the labels in the diagram are as follows: 1. Workbench; 2. Propeller; 3. Shaft; 31. Movable groove; 32. Through groove; 4. Internal support plate; 5. Rotating arm; 51. Clamping block; 6. Displacement mechanism; 61. Sliding sleeve; 611. Locking block; 62. Lower connecting rod; 63. Electric telescopic rod; 64. Extension rod; 641. Slot; 65. Hinge rod; 66. Upper connecting rod; 7. Bracket. Detailed Implementation

[0016] 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. Example

[0017] Please see Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a propeller drilling and positioning device, including a worktable 1. A shaft 3 is fixedly installed on the upper side wall of the worktable 1. Several brackets 7 are fixedly installed in a ring array on the circumferential side wall of the shaft 3. The brackets 7 are used to support the propeller 2. Several inner support plates 4 are arranged above the brackets 7. All the inner support plates 4 are arranged in a ring array with the axis of the shaft 3 as the center. The maximum distance between the inner support plates 4 and the axis of the shaft 3 is less than the radius of the central hole of the propeller hub of the propeller 2, so that the inner support plates 4 can be smoothly inserted into the central hole.

[0018] The bottom of the circumferential sidewall of the shaft 3 is hinged with several rotating arms 5 in an annular array. The other end of the rotating arm 5 is fixedly connected to a clamping block 51. The clamping block 51 is located on the side of the inner support plate 4 away from the axis of the shaft 3, and the distance between the clamping block 51 and the inner support plate 4 is greater than the difference between the inner diameter and the outer diameter of the propeller hub 2, thus reserving enough space for clamping operation. A displacement mechanism 6 is provided on the shaft 3. The displacement mechanism 6 is used to drive all the inner support plates 4 to move synchronously closer to or away from the axis of the shaft 3 in the horizontal direction, and at the same time drive all the rotating arms 5 to rotate synchronously around their hinge points.

[0019] In use, the propeller 2 is first hoisted onto the device using an external hoisting device, so that the center hole of the propeller 2 hub is fitted onto the outside of the shaft 3 and all the inner support plates 4, until the bottom of the propeller 2 contacts the top of the bracket 7, completing the initial installation. Then, the displacement mechanism 6 is activated to drive the inner support plates 4 to move outward until all the inner support plates 4 are tightly attached to the inner wall of the center hole of the propeller 2 hub, thus achieving the internal support fixation of the propeller 2. At the same time, the displacement mechanism 6 drives the rotating arm 5 to rotate, causing the clamping blocks 51 to retract towards the axis of the shaft 3. While the inner support plates 4 have completed the internal support fixation, all the clamping blocks 51 together clamp the outer wall of the propeller 2 hub.

[0020] With the above structure, this device can achieve dual fixation of the propeller 2 by the inner support and the outer clamping in the same action, which not only enhances the stability and reliability of positioning, but also effectively reduces the displacement or vibration of the propeller 2 during the processing, thereby improving the drilling accuracy and processing quality.

[0021] Reference Figures 3-6 The bottom of the shaft 3 is coaxially provided with a movable groove 31. The inner wall of the movable groove 31 is symmetrically provided with two through grooves 32. The other end of the through grooves 32 extends to the outer circumference of the shaft 3. The movable groove 31 and the through grooves 32 provide installation space for the displacement mechanism 6. The structure of the displacement mechanism 6 is detailed below. The displacement mechanism 6 includes a sliding sleeve 61 that is slidably sleeved on the shaft 3. In order to drive the sliding sleeve 61 to move, the displacement mechanism 6 also includes an electric telescopic rod 63 fixedly installed at the bottom of the workbench 1. The upper end of the push rod of the electric telescopic rod 63 slides through the workbench 1 and is coaxially fixedly connected to an extension rod 64. The extension rod 64 is slidably installed inside the movable groove 31. The extension rod 64 is provided with a slot 641 at the position corresponding to the two through grooves 32. The inner wall of the sliding sleeve 61 is fixedly installed with a block 611 at the position corresponding to the two slots 641. The other end of the block 611 passes through the through groove 32 and is inserted into the corresponding slot 641.

[0022] After the electric telescopic rod 63 is started, its push rod extends and retracts, causing the extension rod 64 to move up and down. The extension rod 64 drives the sliding sleeve 61 to move synchronously through the insertion and cooperation of the locking block 611 and the locking groove 641. The locking block 611 slides inside the through groove 32.

[0023] The bottom of the sliding sleeve 61 is hinged with an inclined lower connecting rod 62 at the position corresponding to each rotating arm 5. The other end of the lower connecting rod 62 is hinged to the corresponding rotating arm 5. There are two inclined hinge rods 65 hinged between the inner support plate 4 and the shaft 3. The two hinge rods 65 are parallel to each other. The two hinge rods 65, the inner support plate 4 and the shaft 3 form a parallelogram structure, which restricts the movement path of the inner support plate 4 and ensures that the inner support plate 4 remains vertical during movement. The top of the sliding sleeve 61 is hinged with an inclined upper connecting rod 66 at the position corresponding to each inner support plate 4. The other end of the upper connecting rod 66 is hinged to the side of the corresponding inner support plate 4 near the shaft 3.

[0024] When the electric telescopic rod 63 drives the sliding sleeve 61 to move upward, the sliding sleeve 61 will simultaneously drive the upper connecting rod 66 and the lower connecting rod 62 to move. The upper connecting rod 66 pushes the inner support plate 4 away from the axis of the shaft 3 in the horizontal direction, thereby completing the inner support fixation of the center hole of the propeller hub. At the same time, the lower connecting rod 62 pulls the rotating arm 5 to rotate upward, driving the clamping block 51 to retract in the direction of the axis of the shaft 3, thereby achieving the clamping of the outer side of the propeller hub. Thus, through the single up and down movement of the sliding sleeve 61, the dual fixing effect of inner support and external clamping is simultaneously achieved.

[0025] In addition, to accommodate the size differences between the inner and outer diameters of the propeller hubs of different propellers 2, rubber blocks of appropriate thickness can be added to the side of the inner support plate 4 away from the shaft 3 and the side of the clamping block 51 close to the shaft 3. By adjusting the thickness of the rubber blocks, it can be ensured that while the inner support plate 4 is tightening the inner wall of the center hole of the propeller hub outward, the clamping block 51 can also clamp the outer wall of the propeller hub simultaneously, thereby achieving stable and reliable internal and external synchronous fixation.

[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 preferred examples and are not intended to limit the 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A propeller drilling and positioning device, comprising a worktable (1), characterized in that: A shaft (3) is fixedly installed on the upper side wall of the workbench (1). Several brackets (7) are fixedly installed in a ring array on the circumferential side wall of the shaft (3). Several inner support plates (4) are arranged above the brackets (7). All the inner support plates (4) are arranged in a ring array with the shaft (3) axis as the center. Several rotating arms (5) are hinged in a ring array at the bottom of the circumferential side wall of the shaft (3). The other end of the rotating arm (5) is fixedly connected to a clamp (51). 1) On the side of the inner support plate (4) away from the axis of the shaft (3), a displacement mechanism (6) is provided on the shaft (3). The displacement mechanism (6) is used to drive all the inner support plates (4) to move synchronously closer to or away from the axis of the shaft (3) in the horizontal direction, and at the same time drive all the rotating arms (5) to rotate synchronously around their hinge points. When the displacement mechanism (6) drives the inner support plate (4) away from the axis of the shaft (3), it synchronously drives the rotating arms (5) to rotate, so that the clamping block (51) retracts towards the axis of the shaft (3).

2. The propeller drilling and positioning device according to claim 1, characterized in that: The displacement mechanism (6) includes a sliding sleeve (61) that is slidably sleeved on the shaft (3). The bottom of the sliding sleeve (61) is hinged to a lower connecting rod (62) at a position corresponding to each rotating arm (5). The other end of the lower connecting rod (62) is hinged to the corresponding rotating arm (5).

3. The propeller drilling and positioning device according to claim 1, characterized in that: Two inclined hinge rods (65) are hinged between the inner support plate (4) and the shaft (3), and the two hinge rods (65) are parallel to each other.

4. The propeller drilling and positioning device according to claim 2, characterized in that: The top of the sliding sleeve (61) is hinged to an inclined upper connecting rod (66) at a position corresponding to each inner support plate (4), and the other end of the upper connecting rod (66) is hinged to the side of the corresponding inner support plate (4) near the shaft (3).

5. The propeller drilling and positioning device according to claim 2, characterized in that: The bottom of the shaft (3) is coaxially provided with a movable groove (31), and two through grooves (32) are symmetrically provided on the inner wall of the movable groove (31). The other end of the through groove (32) extends through to the outer circumference of the shaft (3).

6. The propeller drilling and positioning device according to claim 5, characterized in that: The displacement mechanism (6) also includes an electric telescopic rod (63) fixedly installed at the bottom of the workbench (1). The upper end of the push rod of the electric telescopic rod (63) slides through the workbench (1) and is coaxially fixedly connected to an extension rod (64). The extension rod (64) is slidably installed inside the movable groove (31).

7. The propeller drilling and positioning device according to claim 6, characterized in that: The extension rod (64) is provided with slots (641) at positions corresponding to the two through slots (32). The inner wall of the sliding sleeve (61) is fixedly installed with blocks (611) at positions corresponding to the two slots (641). The other end of the blocks (611) passes through the through slot (32) and is inserted into the corresponding slot (641).

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