Rotating shaft secondary positioning jig and machining production line

Abstract

The utility model relates to the technical field of jigs, in particular to a secondary positioning jig for a rotating shaft of a notebook computer and a processing production line. The utility model discloses a secondary positioning jig for a rotating shaft, which comprises a movable table, a fixed block and a first pushing block capable of sliding towards the fixed block are fixedly arranged on the movable table, a positioning step matched with the first pushing block and the fixed block and profiling the rotating shaft is arranged between the first pushing block and the fixed block, and a first spring is arranged between the first pushing block and the fixed block; the movable table is further provided with a second pushing block located on the side face of the fixed block and the side face of the first pushing block, the second pushing block is provided with a positioning step profiling the rotating shaft, the movable table is further provided with a driving device connected with the second pushing block, and a push rod of the driving device is sleeved with a second spring. The technical problem to be solved by the utility model is to develop a secondary positioning jig and a processing production line which are accurate in positioning and can avoid damage to a rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a secondary positioning fixture for the hinge of a laptop computer and a processing production line. Background Technology

[0002] The hinge is an almost essential component of a laptop. Its design quality affects not only the laptop's user comfort and overall style but also the arrangement of its ports. To ensure smoother hinge operation, specific parts of the hinge require lubrication during production, and related components need to be assembled. All of these processing steps rely on accurate hinge positioning, while ensuring that the hinge itself is not damaged. However, existing hinge positioning fixtures often perform one-time positioning, requiring precise placement into the limiting groove, which is inefficient. Furthermore, due to the dimensional tolerances of the hinge, existing positioning fixtures pose a risk of inaccurate positioning and damage to the hinge.

[0003] Therefore, those skilled in the art are dedicated to developing a secondary positioning fixture and processing line that can accurately position the shaft and avoid damage to it. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the present invention discloses a secondary positioning fixture and processing production line for a rotating shaft. The technical problem to be solved is to provide a secondary positioning fixture and processing production line that provides accurate positioning and avoids damage to the rotating shaft.

[0005] To achieve the above objectives, this utility model provides a secondary positioning fixture for a rotating shaft, including a movable stage. A fixed block and a first push block slidable toward the fixed block are fixed on the movable stage. A positioning step conforming to the shape of the rotating shaft is provided between the first push block and the fixed block, and a first spring is provided between the first push block and the fixed block. The movable stage also provides a second push block located on the side of the fixed block and the first push block. The second push block has a positioning step conforming to the shape of the rotating shaft, and the movable stage also provides a driving device connected to the second push block. A second spring is sleeved on the push rod of the driving device. The driving device can be a linearly driven device such as a cylinder or a hydraulic cylinder.

[0006] Preferably, both the first pushing block and the fixing block are provided with pin holes, and a guide pin is provided in the pin hole, with the first spring sleeved on the guide pin. Specifically, one end of the guide pin can be fixed in the pin hole of the first pushing block or the fixing block, and the other end of the guide pin can be made into a tapered guide portion to facilitate insertion into the pin hole on the same side. Alternatively, the length of the guide pin can be increased so that the other end of the guide pin slides into the pin hole on the same side, which can also achieve the guiding and limiting function.

[0007] Preferably, the side of the movable stage is provided with a drive block for pushing the first pressing block. The drive block is connected to a power source, which can be a linearly driven device such as a cylinder or hydraulic cylinder. The second pressing block is provided with an anti-jamming body, which can be a bearing arranged vertically along the axial line. The drive block is provided with an arc surface that slides in cooperation with the anti-jamming body. During the pressing process, if the position of the drive block deviates, the arc surface contacts the bearing, and it can slide forward under the rotation of the bearing, avoiding jamming between the drive block and the second pressing block, thus reducing manufacturing progress and production costs.

[0008] Preferably, the second push block has an installation groove, and the anti-jamming body is installed in the installation groove by a support shaft installed in the vertical direction.

[0009] Preferably, the movable platform is provided with a positioning device on the side near the fixed block. The positioning device has a connected power source and a positioning rotating body. The power source can be a linearly driven device such as a cylinder or hydraulic cylinder. The positioning rotating body can be a bearing arranged vertically along the axial line. The movable platform has a positioning groove that mates with the positioning rotating body. The positioning groove is an arc surface. When the movable platform moves to the designated position, the power source pushes the positioning rotating body to engage with the positioning groove, thus supporting and positioning one side of the movable platform.

[0010] Preferably, the moving platform is further provided with a limiting block, which is fixed to the side of the second push block away from the second spring; the limiting block has a threaded through hole, and a limiting screw is fitted in the threaded through hole, the limiting screw corresponding to the second push block. By adjusting the screw-out length of the limiting screw, the extreme position of the second push block is controlled by the screw, further preventing the rotating shaft from being damaged by the second push block.

[0011] Preferably, the moving platform is provided with an anti-slip plate that rubs against the timing belt. The surface of the anti-slip plate can be toothed to prevent the moving platform from slipping off the timing belt.

[0012] This utility model also provides a shaft processing production line, including the secondary positioning fixture as described above.

[0013] Preferably, the rotating shaft processing production line provided by this utility model further includes a center positioning material picking device and a dual-axis oiling mechanism; the secondary positioning fixture is used for secondary positioning of the rotating shaft, the dual-axis oiling mechanism is used for oiling the positioned rotating shaft, and the center positioning material picking device is used for picking up materials and loading them onto the oiled rotating shaft.

[0014] Specifically, the dual-axis oil injection mechanism includes a column for fixing the mechanism to the production line. A mounting plate is connected to the column via a power source, which can be a linearly driven device such as a cylinder or hydraulic cylinder. Two oil injection devices are mounted on the mounting plate. Each device includes an oil injection motor, the shaft of which is connected to an oil injection pipe. The bottom end of the oil injection pipe is rotatably connected to an eccentrically positioned oil injection needle, thereby forming a circular oil injection path for precise oil injection onto annular parts.

[0015] The beneficial effects of this utility model are:

[0016] By setting up a first and a second pusher block, each equipped with a first and a second spring, the clamping force of the first and second pusher blocks on the rotating shaft is subject to the rebound force of the springs. This prevents excessive pushing force from damaging the rotating shaft and allows the pusher blocks to be advanced gradually, preventing sudden advances from crushing the rotating shaft and providing protection. Furthermore, the contour-following positioning step first performs initial positioning of the rotating shaft, and then the first and second pusher blocks, under the action of the springs, perform secondary positioning, improving positioning accuracy. Attached Figure Description

[0017] Figure 1 This is a partial structural schematic diagram of the secondary positioning fixture of this utility model;

[0018] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0019] Figure 3 This is a partial exploded view of the secondary positioning fixture of this utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of a portion of point B in the middle;

[0021] Figure 5 This is a schematic diagram of the secondary positioning fixture of this utility model;

[0022] Figure 6 yes Figure 5 Enlarged view of a portion of point C in the middle;

[0023] Figure 7 This is a schematic diagram of the positioning device of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the limiting block of this utility model;

[0025] Figure 9 This is a partial structural schematic diagram of the shaft processing production line of this utility model;

[0026] Figure 10 This is a schematic diagram of the structure of the biaxial oil injection mechanism of this utility model;

[0027] Figure 11 This is a cross-sectional schematic diagram of the oil injection device of this utility model;

[0028] Figure 12 This is a schematic diagram of a specific embodiment of the centrally positioned negative pressure adsorption device of this utility model;

[0029] Figure 13 This is a cross-sectional schematic diagram of the central positioning negative pressure adsorption device of this utility model under different states;

[0030] Figure 14 This is an explosion diagram of the centrally positioned negative pressure adsorption device of this utility model;

[0031] Figure 15 This is a schematic diagram of the central positioning component of the central positioning negative pressure adsorption device of this utility model;

[0032] Figure 16 This is a schematic diagram of the suction head of the centrally positioned negative pressure adsorption device of this utility model;

[0033] Figure 17 This is a schematic diagram of the internal structure of the centrally positioned negative pressure adsorption device of this utility model;

[0034] Figure 18 This is a structural schematic diagram of the center positioning material handling device of this utility model.

[0035] In the above figures: 10. Center positioning material handling device; 1. Center positioning negative pressure adsorption device; 11. Connecting round pipe; 111. Limiting pin; 112. Short pin; 12. Air pipe connector; 121. Connecting screw; 13. Suction head; 131. Conical head; 132. Second strip-shaped through hole; 133. Second elastic element; 134. Cross-shaped vent hole; 14. Center positioning element; 141. Positioning shaft; 1411. First strip-shaped through hole; 142. Mounting head; 143. Positioning pin; 15. First elastic element; 16. Positioning block; 17. Mounting block; 2. Frame; 21. First slide rail; 22. Second slide rail;

[0036] 20. Secondary positioning fixture; 3. Moving table; 31. Fixing block; 32. First push-tightening block; 321. Pin hole; 33. Second push-tightening block; 331. Mounting groove; 332. Anti-jamming rotation body; 34. Drive device; 341. Second spring; 35. Positioning groove; 36. Limiting block; 361. Limiting screw; 37. Anti-slip plate; 4. Drive block; 41. Arc surface; 5. Positioning device; 51. Positioning rotation body;

[0037] 30. Dual-axis oil injection mechanism; 6. Column; 7. Mounting plate; 8. Oil injection device; 81. Oil injection motor; 82. Oil injection pipe; 83. Oil injection needle;

[0038] 40. Rotating shaft. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for 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 manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] like Figures 1 to 4 As shown, this utility model provides a secondary positioning fixture for a rotating shaft, including a movable stage 3. A fixed block 31 and a first push block 32 slidable towards the fixed block 31 are fixed on the movable stage 3. A positioning step conforming to the rotating shaft 40 is provided between the first push block 32 and the fixed block 31, and a first spring (not shown in the figure) is provided between the first push block 32 and the fixed block 31. The movable stage 3 also has a second push block 33 located on the side of the fixed block 31 and the first push block 32. The second push block 33 has a positioning step conforming to the rotating shaft 40, and the movable stage 3 also has a drive device 34 connected to the second push block 33. A second spring 341 is sleeved on the push rod of the drive device 34. The drive device 34 can be a linearly driven device such as a cylinder or hydraulic cylinder. Furthermore, both the first push block 32 and the fixed block 31 have pin holes 321, with guide pins inside the pin holes 321, and the first spring is sleeved on the guide pins. Specifically, one end of the guide pin can be fixed in the pin hole 321 of the first push block 32 or the fixing block 31, and the other end of the guide pin can be made into a tapered guide portion to facilitate insertion into the pin hole 321 on the same side. Alternatively, the length of the guide pin can be increased so that the other end of the guide pin slides into the pin hole 321 on the same side, which can also achieve the guiding and limiting function. At the same time, the moving table 3 is provided with an anti-slip plate 37 that rubs against the timing belt. The surface of the anti-slip plate 37 can be toothed to prevent the moving table 3 from slipping off the timing belt.

[0041] In the above embodiments, by setting a first pressing block 32 and a second pressing block 33, and respectively providing a first spring and a second spring 341, the clamping force of the first pressing block 32 and the second pressing block 33 on the rotating shaft 40 is subject to the rebound force of the springs. This prevents excessive pushing force of the pressing blocks from damaging the rotating shaft, and allows the pressing blocks to be advanced gradually, preventing sudden advances from damaging the rotating shaft, thus providing protection. Furthermore, the contour positioning step first performs preliminary positioning of the rotating shaft, and then the first pressing block 32 and the second pressing block 33 perform secondary positioning under the action of the springs, improving the accuracy of the positioning.

[0042] like Figure 5 and Figure 6 As shown, the side of the moving platform 3 is provided with a drive block 4 for pushing the first pressing block 32. The drive block 4 is connected to a power source, which can be a linearly driven device such as a cylinder or hydraulic cylinder. The second pressing block 33 is provided with an anti-jamming body 332, which can be configured as a bearing arranged vertically along the axial line. The drive block 4 is provided with an arc surface 41 that slides with the anti-jamming body 332. Specifically, as shown... Figure 4 As shown, the second push block 33 has a mounting groove 331, and an anti-jamming body 332 is installed in the mounting groove 331 via a support shaft installed vertically. During the pushing process, if the position of the drive block 4 deviates, the arc surface 41 contacts the bearing and can slide forward under the rotation of the bearing, avoiding jamming between the drive block 4 and the second push block 33, thus reducing manufacturing progress and production costs.

[0043] like Figure 7 and Figure 5 As shown, a positioning device 5 is provided on the side of the movable stage 3 near the fixed block 31. The positioning device 5 is equipped with a connected power source and a positioning rotating body 51. The power source can be a linearly driven device such as a cylinder or hydraulic cylinder. The positioning rotating body 51 can be a bearing arranged vertically along the axial line. The movable stage 3 is provided with a positioning groove 35 that cooperates with the positioning rotating body 51. The positioning groove 35 is an arc-shaped surface. When the movable stage 3 moves to the designated position, the power source pushes the positioning rotating body 51 to engage with the positioning groove 35, thus supporting and positioning one side of the movable stage 3.

[0044] like Figure 8 and Figure 5 As shown, the movable stage 3 is also equipped with a limiting block 36, which is fixed to the side of the second push block 33 away from the second spring 341. The limiting block 36 has a threaded through hole, and a limiting screw 361 is fitted inside the threaded through hole, which corresponds to the second push block 33. By adjusting the screw-out length of the limiting screw 361, the extreme position of the second push block 33 is controlled by the screw, further preventing the shaft from being crushed by the second push block 33.

[0045] like Figure 9 As shown, this utility model also provides a shaft processing production line, including the secondary positioning fixture 20 as described above, as well as a center positioning material handling device 10 and a dual-axis oiling mechanism 30. The secondary positioning fixture 20 is used for secondary positioning of the shaft, the dual-axis oiling mechanism 30 is used for oiling the positioned shaft, and the center positioning material handling device 10 is used for picking up materials and loading them onto the oiled shaft.

[0046] Specifically, such as Figure 10 and Figure 11 As shown, the dual-axis oil injection mechanism 30 includes a column 6, which is used to fix the mechanism to the production line. A mounting plate 7 is connected to the column 6 via a power source, which can be a linearly driven device such as a cylinder or hydraulic cylinder. Two oil injection devices 8 are mounted on the mounting plate 7. Each oil injection device 8 includes an oil injection motor 81. The shaft of the oil injection motor 81 is connected to an oil injection pipe 82. The bottom end of the oil injection pipe 82 is rotatably connected to an eccentrically positioned oil injection needle 83, thereby forming a circular oil injection path, allowing for precise oil injection onto annular parts.

[0047] like Figures 12 to 18 The diagram shows a detailed embodiment of the center positioning negative pressure adsorption device 1 and the center positioning material handling device 10 in a rotary shaft processing production line. The specific structure is as follows:

[0048] like Figures 12 to 14 As shown, this utility model provides a centrally positioned negative pressure adsorption device 1, including a connecting tube 11. One end of the connecting tube 11 is sealed with an air pipe connector 12. A connecting screw 121, which passes through the center, is provided between the connecting tube 11 and the air pipe connector 12. The end face of the connecting screw 121 abuts against a first elastic element 15. The air pipe connector 12 is threadedly connected to the connecting screw 121, and the connecting screw 121 is threadedly connected to the connecting tube 11, thereby ensuring airtightness. The other end of the connecting tube 11 is connected to a suction head 13, and a central positioning element 14 is slidably connected inside the suction head 13. The positioning pin 143 of the central positioning element 14 extends out of the suction head 13. A first elastic element 15, which can be a spring, is provided between the air pipe connector 12 and the central positioning element 14. Meanwhile, a positioning block 16 and a mounting block 17 are provided on the outside of the connecting round tube 11. Both the positioning block 16 and the mounting block 17 are provided with arc-shaped grooves that cooperate with the connecting round tube 11. The two arc-shaped grooves are joined together to form a cylindrical space that cooperates with the connecting round tube 11.

[0049] In the above embodiments, by setting a central positioning member 14, its positioning pin 143 can pass through the hole in the middle of the material. A contour positioning pin can be installed in the middle. For products with holes in the middle, the positioning pin 143 can prevent the product from deviating and can also block the middle hole to prevent air leakage, thus achieving precise positioning. At the same time, the middle of the positioning pin 143 is pointed, which can greatly reduce the accuracy of the transfer mechanism during material handling. In addition, the air pipe connector 12 is used to connect with the air pipe and form a negative pressure in the connecting round pipe 11. The central positioning member 14 can move axially under the action of the first elastic member 15, thereby driving the movement of the suction head 13, so that the suction head 13 can fully contact the material, achieve a sealing effect, and facilitate negative pressure adsorption.

[0050] like Figure 15 and Figure 13 As shown, the center positioning component 14 includes a positioning shaft 141. One end of the positioning shaft 141 is provided with a mounting head 142 that mates with a first elastic element 15. The diameter of the mounting head 142 is smaller than the diameter of the positioning shaft 141. The first elastic element 15 is a spring, and the end of the spring is sleeved on the mounting head 142 and limited by the positioning shaft 141. The other end of the positioning shaft 141 is connected to a positioning pin 143, the end of which is pointed. In addition, a first radially penetrating strip-shaped through hole 1411 is provided on the positioning shaft 141 along the axial direction. A limit pin 111 is slidably fitted inside the first strip-shaped through hole 1411, and both ends of the limit pin 111 are fixedly connected to the connecting round tube 11. Under the action of the spring, the movement distance of the center positioning component 14 is controlled by the limit pin 111 to prevent the center positioning component 14 from falling out of the connecting round tube 11.

[0051] like Figure 16 , Figure 17 and Figure 13 As shown, the suction head 13 has a conical head 131 at its suction end and a second strip-shaped through hole 132 at its other end. A second elastic element 133 is provided between the conical head 131 and the connecting tube 11. The second elastic element 133 can also be a spring. To avoid interference, two short pins 112 that slide in contact with the second strip-shaped through hole 132 are installed on the connecting tube 11. Under the action of the second elastic element 133, the second strip-shaped through hole 132, and the short pins 112, the movement distance of the suction head 13 can be limited. When picking up materials, the air pipe connector 12 is installed on the connecting tube 11 to connect the air source. When picking up the product, the suction head 13 contacts the product, and at the same time, the first elastic element 15 of the center positioning element 14 and the second elastic element 133 of the suction head 13 retract, and the suction head 13 and the center positioning pin 143 contact the material. At the same time, the negative pressure is opened to adsorb the material. In addition, the suction head 13 has a cross-shaped vent 134 inside, and the cross-shaped vent 134 has an arc-shaped surface that slides with the positioning pin 143. Figure 13Figure (a) shows the state where both the first elastic element 15 and the second elastic element 133 are compressed and both are provided with limit pins 111 and short pins 112. Figure 13 Figure (b) shows the state where the first elastic element 15 is compressed, the second elastic element 133 is not compressed, and both are provided with limit pins 111 and short pins 112. Figure 13 Figure (c) shows a state where neither the first elastic element 15 nor the second elastic element 133 is compressed, and only the limit pin 111 is provided.

[0052] like Figure 18 As shown, the present invention provides a center-positioning material handling device 10, including the center-positioning negative pressure adsorption device 1 as described above, and a frame 2. The frame 2 is provided with a first slide rail 21 along the X-direction, and a second slide rail 22 along the Z-direction is slidably connected to the first slide rail 21. Two center-positioning negative pressure adsorption devices 1 are slidably mounted on the second slide rail 22. Both the second slide rail 22 and the center-positioning negative pressure adsorption devices 1 are provided with a power source, which can be a cylinder or hydraulic cylinder, etc., to push the second slide rail 22 to move along the first slide rail 21 (X-direction) and push the negative pressure adsorption devices to move along the second slide rail 22 (Z-direction), thereby adjusting the position of the negative pressure adsorption devices. The second slide rail 22 is provided with a slidingly fitted connecting post, and a mounting block 17 is used to fix the center-positioning negative pressure adsorption device 1 to the connecting post.

[0053] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A secondary positioning fixture for a rotating shaft, characterized in that: The device includes a movable platform (3), on which a fixed block (31) and a first push block (32) slidable toward the fixed block (31) are fixedly provided. A positioning step that matches the first push block (32) and the fixed block (31) and conforms to the rotating shaft (40) is provided. A first spring is provided between the first push block (32) and the fixed block (31). The movable platform (3) is also provided with a second push block (33) located on the side of the fixed block (31) and the first push block (32). The second push block (33) is provided with a positioning step that conforms to the rotating shaft (40). The movable platform (3) is also provided with a drive device (34) connected to the second push block (33). A second spring (341) is sleeved on the push rod of the drive device (34).

2. The secondary positioning fixture as described in claim 1, characterized in that: Both the first push block (32) and the fixing block (31) are provided with pin holes (321), and a guide pin is provided in the pin hole (321), and the first spring is sleeved on the guide pin.

3. The secondary positioning fixture as described in claim 1, characterized in that: The side of the moving platform (3) is provided with a driving block (4) for pushing the first push block (32); the second push block (33) is provided with an anti-jamming rotation body (332), and the driving block (4) is provided with an arc surface (41) that slides with the anti-jamming rotation body (332); the driving block (4) is connected to a power source.

4. The secondary positioning fixture as described in claim 3, characterized in that: The second push block (33) has an installation groove (331) and the anti-jamming rotation body (332) is installed in the installation groove (331) through a support shaft.

5. The secondary positioning fixture as described in claim 1, characterized in that: The moving platform (3) is provided with a positioning device (5) on the side near the fixed block (31). The positioning device (5) is provided with a connected power source and a positioning rotating body (51). The moving platform (3) is provided with a positioning groove (35) that cooperates with the positioning rotating body (51).

6. The secondary positioning fixture as described in claim 1, characterized in that: The movable platform (3) is also provided with a limiting block (36), which is fixed to the side of the second push block (33) away from the second spring (341). The limiting block (36) is provided with a threaded through hole, and a limiting screw (361) is fitted in the threaded through hole. The limiting screw (361) corresponds to the second push block (33).

7. The secondary positioning fixture as described in claim 1, characterized in that: The mobile platform (3) is provided with an anti-slip plate (37) that rubs against the synchronous belt.

8. A shaft processing production line, characterized in that: Includes the secondary positioning fixture (20) as described in any one of claims 1 to 7.

9. The shaft processing production line as described in claim 8, characterized in that: It also includes a center positioning material picking device (10) and a dual-axis oiling mechanism (30); the secondary positioning fixture (20) is used to perform secondary positioning of the rotating shaft (40), the dual-axis oiling mechanism (30) is used to oil the positioned rotating shaft (40), and the center positioning material picking device (10) is used to pick up the material and load it onto the oiled rotating shaft (40).

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