A positioning device for making a transmission roller of an aircraft cargo hold

Abstract

The utility model discloses an airplane cargo hold transmission roller manufacturing positioning device, it includes base, is equipped with at least one transmission roller clamping position on the base top, is equipped with the clamping seat respectively in each transmission roller clamping position, is equipped with the limiting boss for cooperation and inserts the transmission roller back recess in the limiting boss on the clamping seat, the top of limiting boss is equipped with the locating post for cooperation and inserts the locating hole on the transmission roller, and locating post deviates the center of limiting boss, is provided with the clamping piece on the periphery of clamping seat, and part of clamping piece can press on the top of transmission roller, and the middle part of clamping seat is equipped with the center positioning screw rod of center hole screw connection with transmission roller. The utility model can make the processing of airplane cargo hold transmission roller more smoothly, can better improve the processing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft component manufacturing technology, specifically relating to a positioning device that plays a positioning role in the manufacturing of transmission rollers in aircraft cargo holds. Background Technology

[0002] When machining routine parts on CNC machine tools, a single worktable is usually sufficient. However, the situation becomes much more complex when machining workpieces with special shapes (such as aircraft cargo hold drive rollers, hereinafter referred to as "drive rollers").

[0003] like Figure 7 and Figure 8 The image shows an aircraft cargo hold drive roller 6, which has a groove 6.5 on its back. The sides and front walls of the drive roller 6 are relatively thin, with a central hole 6.1 in the middle. Two connecting ears 6.3 are provided on the front, and mounting holes 6.4 are provided on the connecting ears 6.3. Due to the unique geometric characteristics of the outer surface of the drive roller, if a simple placement or clamping method is used, the displacement limitation is not strict enough, making it difficult to achieve the accuracy standards required for machining operations and failing to meet the needs of actual operation. Therefore, a more precise and suitable positioning device must be designed to ensure the stability and accuracy of the machining process.

[0004] In current machining processes, a common method for limiting the position of transmission rollers is to directly clamp or glue them to the CNC machine tool platform. However, due to the special shape of the transmission rollers and the thinness of the clamping surface, they are prone to deformation during machining. Therefore, the placement on the machine tool is very demanding, requiring multiple dial indicator calibrations, repeated clamping, and repeated adjustments to the machine tool spindle to achieve milling of the transmission roller. When machining the front or side arc surfaces of the transmission rollers, the difficulty of placement or poor stability significantly increases the operational complexity, resulting in a high scrap rate. Furthermore, the machining process is difficult to perform smoothly and efficiently, leading to extremely low overall efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a positioning device for manufacturing transmission rollers in aircraft cargo holds.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A positioning device for manufacturing transmission rollers in an aircraft cargo hold is characterized by: a base, at least one transmission roller clamping position on the base, a clamping seat at each transmission roller clamping position, a limiting boss on the clamping seat for engaging with a groove on the back of the transmission roller, a positioning pin on the top of the limiting boss for engaging with a positioning hole on the transmission roller, the positioning pin being offset from the center of the limiting boss, clamping pieces around the periphery of the clamping seat, a portion of the clamping pieces being able to press against the transmission roller, and a central positioning screw in the middle of the clamping seat being able to be threadedly connected to the central hole of the transmission roller.

[0008] A further technical solution of this utility model is as follows: the positioning device is provided with a locking bolt for each clamping piece, the periphery of the clamping seat is provided with a connecting column, the connecting column is provided with a threaded connecting hole, one end of the clamping piece is provided with a connecting hole, and the other end is used to press on the transmission roller, the locking bolt passes through the connecting hole of the clamping piece and connects with the threaded connecting hole of the connecting column.

[0009] A further technical solution of this utility model is: the periphery of the clamping seat is provided with an outwardly extended side portion corresponding to the position of the connecting column, and the connecting column is provided on the side portion.

[0010] A further technical solution of this utility model is: a washer is provided on the locking bolt, and the washer is located between the clamping piece and the head of the locking bolt.

[0011] A further technical solution of this utility model is: a through hole is provided in the middle of the clamping base, and a central positioning screw is inserted from the lower end of the through hole.

[0012] A further technical solution of this utility model is: the through hole is a countersunk hole with an increased lower diameter, and the head of the central positioning screw is recessed into the lower end of the through hole.

[0013] A further technical solution of this utility model is: the base is rectangular, and transmission roller clamping positions are provided at both ends of the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention provides better positioning and support for the transmission rollers during the machining process of aircraft cargo hold transmission rollers. The limiting boss fits into the groove on the back of the transmission roller, not only achieving positioning but also supporting the thin wall of the transmission roller, preventing deformation during machining and clamping. The positioning pin restricts the rotation of the transmission roller, the center positioning screw positions the center of the transmission roller and fixes it to the clamping base, and the clamping plate provides clamping during milling of the center hole of the transmission roller. Therefore, this invention makes the machining process of aircraft cargo hold transmission rollers smoother and improves machining efficiency. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of the positioning device according to an embodiment of the present utility model. The components at the drive roller clamping position at one end are all assembled on the base, while the components at the drive roller clamping position at the other end are disassembled.

[0017] Figure 2 This is a second structural schematic diagram of the positioning device according to an embodiment of the present utility model. The components at the drive roller clamping position at one end are all assembled on the base, while the components at the drive roller clamping position at the other end are disassembled.

[0018] Figure 3 This is a schematic diagram of the positioning device of this utility model, which fixes the transmission roller on the central positioning screw.

[0019] Figure 4 This is a schematic diagram of the positioning device of this utility model, which fixes the transmission roller on the clamping plate.

[0020] Figure 5 This is a structural diagram of the blank used to manufacture the transmission roller;

[0021] Figure 6 This is a structural diagram of the pre-processed part during the manufacturing process of the transmission roller;

[0022] Figure 7 This is a structural diagram of the front of the transmission roller;

[0023] Figure 8 This is a schematic diagram of the structure on the back of the transmission roller.

[0024] Meaning of the labels in the attached diagram:

[0025] 1-Base; 1.1-Clamping seat; 1.2-Limiting boss; 1.3-Connecting post; 1.4-Threaded connection hole; 1.5-Through hole; 1.6-Positioning post; 1.7-Side part; 2-Center positioning screw; 3-Clamping piece; 3.1-Connecting hole; 4-Washer; 5-Locking bolt; 6-Transmission roller; 6.1-Center hole; 6.2-Positioning hole; 6.3-Connecting lug; 6.4-Mounting hole; 6.5-Groove; 7-Blank; 8-Preliminary finished part. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Example:

[0031] like Figure 1 and Figure 2 The image shows the aircraft cargo hold drive roller manufacturing and positioning device of this embodiment, which includes a base 1, a center positioning screw 2, a clamping plate 3, a washer 4, and a locking bolt 5.

[0032] In this embodiment, the base 1 is rectangular and has a symmetrical structure. Drive roller clamping positions are provided at both ends of the base 1. In another embodiment, the number of drive roller clamping positions can be adjusted according to processing requirements and the shape of the base.

[0033] Each drive roller clamping position is provided with a clamping seat 1.1, which is circular. A limiting boss 1.2 is provided on the clamping seat 1.1. The limiting boss 1.2 is also circular. The diameter of the limiting boss 1.2 is smaller than the diameter of the clamping seat 1.1. The size of the limiting boss 1.2 is adapted to the size of the groove 6.5 on the back of the drive roller 6. During processing, the limiting boss 1.2 fits into the groove 6.5 on the back of the drive roller 6 to form a positioning and support for the drive roller 6.

[0034] A positioning post 1.6 is provided on the upper part of the limiting boss 1.2, and the positioning post 1.6 is offset from the center of the limiting boss 1.2. During the processing, a corresponding positioning hole 6.2 will be machined on the transmission roller 6, and the positioning post 1.6 will be inserted into the positioning hole 6.2 on the transmission roller 6. The positioning post 1.6 does not protrude above the positioning hole 6.2, and the rotation of the transmission roller 6 is limited by the positioning post 1.6.

[0035] In this embodiment, three clamping pieces 3 are evenly distributed around the clamping base 1.1. The specific installation structure of the clamping pieces 3 is as follows: an outwardly extending side portion 1.7 is provided around the clamping base 1.1, and an upwardly protruding connecting post 1.3 is provided on the side portion 1.7. The connecting post 1.3 is provided with a threaded connecting hole 1.4. One end of the clamping piece 3 is provided with a connecting hole 3.1, and the other end is used to press on the transmission roller 6. The locking bolt 5 passes through the connecting hole 3.1 of the clamping piece 3 and connects with the threaded connecting hole 1.4 of the connecting post 1.3, thereby realizing the locking of the clamping piece 3. The washer 4 is sleeved on the locking bolt 5 and is located between the head of the clamping piece 3 and the head of the locking bolt 5.

[0036] In this embodiment, a through hole 1.5 is provided in the middle of the clamping base 1.1. The through hole 1.5 penetrates the base 1.1 and is a countersunk hole with a larger diameter at the lower end. During the machining of the transmission roller 6, the center positioning screw 2 will be inserted from the lower end of the through hole 1.5. The head of the center positioning screw 2 will be recessed into the lower end of the through hole 1.5. A thread will be machined into the bottom of the center hole 6.1 of the transmission roller 6. The upper end of the center positioning screw 2 will be connected to the thread at the bottom of the center hole 6.1 of the transmission roller 6, thereby fixing the transmission roller 6 on the clamping base 1.1 and preventing the transmission roller 6 from shaking or deforming during the machining process.

[0037] The maximum external dimensions of the positioning device in this embodiment are 224mm*82mm*36mm.

[0038] The manufacturing process of the aircraft cargo hold drive rollers using the positioning device of this embodiment is as follows:

[0039] 1. The blank used in its production is a cube-shaped metal block, such as... Figure 5 The diagram shows the structure of the blank 7. First, one side of the blank 7 is machined to form the back of the transmission roller 6, including a groove 6.5, a positioning hole 6.2, and a center hole 6.1. Then, threads are tapped at the bottom of the center hole 6.1 to form a threaded part, resulting in the pre-machined part 8. Since the blank 7 in the above machining process is of a regular shape, it can be clamped and machined on a CNC machine tool using conventional methods.

[0040] 2. Fix the pre-machined part 8, which was processed in step 1, onto the positioning device of this embodiment. Specifically, the groove 6.5 on the pre-machined part 8 fits onto the limiting boss 1.2, the positioning pin 1.6 on the limiting boss 1.2 is inserted into the positioning hole 6.2, and the center positioning screw 2 is inserted under the base 1.1. The upper end of the center positioning screw 2 is threadedly connected to the center hole 6.1 of the pre-machined part 8, thereby fixing the pre-machined part 8. In this step, the clamping piece 3 cannot be used for clamping because the front side of the transmission roller 6 will be processed next, and clamping the clamping piece 3 will affect the processing of the front side of the transmission roller 6.

[0041] 3. Mount the base 1 on a CNC machine tool, and then machine the front side of the transmission roller 6. Since the base 1 is a regular shape, conventional methods can be used to mount the base.

[0042] 4. Remove the center positioning screw 2, and use the clamping piece 3 to clamp the transmission roller 6. One end of the clamping piece 3 presses on the edge of the transmission roller 6 and is locked with the locking bolt 5.

[0043] 5. Mill the center hole 6.1 of the transmission roller 6 to the required size.

[0044] 6. Fix the long side of the base 1 perpendicular to the machining platform of the CNC machine tool at 90°, and machine the connecting hole 6.4 on the connecting ear 6.3 of the transmission roller 6.

[0045] Finally, the production of transmission roller 6 was completed.

[0046] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A positioning device for manufacturing transmission rollers in an aircraft cargo hold, characterized in that: The device includes a base with at least one drive roller clamping position. Each drive roller clamping position has a clamping seat. The clamping seat has a limiting boss for engaging with a groove on the back of the drive roller. The limiting boss has a positioning pin for engaging with a positioning hole on the drive roller. The positioning pin is offset from the center of the limiting boss. Clamping pieces are provided around the periphery of the clamping seat. Part of the clamping pieces can press against the drive roller. The center of the clamping seat has a central positioning screw that can be threadedly connected to the central hole of the drive roller.

2. The aircraft cargo hold drive roller manufacturing and positioning device according to claim 1, characterized in that: The positioning device is provided with a locking bolt for each clamping piece. The periphery of the clamping base is provided with a connecting post. The connecting post is provided with a threaded connecting hole. One end of the clamping piece is provided with a connecting hole, and the other end is used to press on the transmission roller. The locking bolt passes through the connecting hole of the clamping piece and connects with the threaded connecting hole of the connecting post.

3. The aircraft cargo hold drive roller manufacturing and positioning device according to claim 2, characterized in that: The mounting base has an outwardly extending side portion corresponding to the position of the connecting post, and the connecting post is located on the side portion.

4. The aircraft cargo hold transmission roller manufacturing and positioning device according to claim 2, characterized in that: The locking bolt is provided with a washer, which is located between the clamping piece and the head of the locking bolt.

5. The aircraft cargo hold drive roller manufacturing and positioning device according to claim 1, characterized in that: The clamping base has a through hole in the middle, and the central positioning screw passes through the lower end of the through hole.

6. The aircraft cargo hold drive roller manufacturing and positioning device according to claim 5, characterized in that: The through hole is a countersunk hole with a larger diameter at the lower end, and the head of the center positioning screw is recessed into the lower end of the through hole.

7. The aircraft cargo hold drive roller manufacturing and positioning device according to claim 1, characterized in that: The base is rectangular, and the transmission roller clamping positions are respectively provided at both ends of the base.

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