Lift expanding positioning device

Abstract

This application discloses a lifting-type diameter-expanding positioning device, relating to the field of positioning devices. It includes a housing and a positioning pin. The housing is equipped with a lifting assembly for moving the positioning pin. Through the cooperative arrangement of structures such as a fixing plate, connecting pipe, and piston, the device is installed so that the workpiece is directly moved above the housing. Gas is supplied to the housing through the first air inlet, causing the piston to rise within the housing and push the positioning pin into the positioning hole of the workpiece. Then, the diameter of the positioning pin is increased by the diameter-expanding assembly, causing the side wall of the positioning pin to abut against the positioning hole of the workpiece, thus positioning the workpiece. After processing, the piston is lowered through the second air inlet, restoring the device and removing the positioning pin from the positioning hole. This design minimizes the need for operators to lift the workpiece, place the positioning hole of the workpiece onto a pressing component, and directly transport the workpiece above the pressing component for positioning, thus avoiding the problem of reduced work efficiency.

Description

Technical Field

[0001] This application relates to the field of positioning devices, and in particular to lifting-type diameter-expanding positioning devices. Background Technology

[0002] The core function of locating pins is to ensure positional accuracy during mechanical assembly, restrict the degree of freedom of objects for accurate alignment, and transmit smaller loads, while improving assembly efficiency and stability. Through the fit between holes and shafts, they restrict the degree of freedom of movement of objects in space, ensuring that the relative positions between components meet design requirements.

[0003] The utility model patent with announcement number CN210978119U proposes an expanded diameter positioning pin, including a positioning pin body, a piston, a tensioning sleeve, a pressing member, and a spring. The tensioning sleeve is elastically deformable. The piston is slidably disposed in the positioning pin body in a vertical direction. The spring is pressed between the piston and the positioning pin body to drive the piston to move downward. The tensioning sleeve is sleeved on the upper end of the positioning pin body. The lower end of the pressing member is located in the positioning pin body and is fixedly connected to the piston.

[0004] In one of the aforementioned expanded diameter locating pins, when the workpiece is conveyed by the conveying device, the operator needs to lift the workpiece and fit the locating hole of the workpiece onto the pressing part. It is not possible to directly convey the workpiece above the pressing part for positioning, which leads to a reduction in work efficiency. Utility Model Content

[0005] To address the aforementioned issues, this application provides a lifting-type diameter expansion positioning device.

[0006] The lifting-type diameter expansion positioning device provided in this application adopts the following technical solution:

[0007] A lifting-type diameter-expanding positioning device includes a housing and a positioning pin. The housing is provided with a lifting assembly for moving the positioning pin. The lifting assembly includes a fixed plate fixedly connected to the bottom of the housing. A connecting pipe is fixedly connected to the upper surface of the fixed plate. A piston is installed inside the housing and sleeved on the connecting pipe. The top end of the piston extends out of the housing and is connected to the positioning pin. A first air inlet is opened at the bottom end of one side wall of the housing below the piston, and a second air inlet is opened at the top end of one side wall of the housing above the piston. The positioning pin and the connecting pipe are provided with a diameter-expanding assembly for expanding the diameter of the positioning pin.

[0008] By adopting the above technical solution, during use, the device is installed so that the workpiece is directly moved above the housing. Gas is supplied into the housing through the first air inlet, causing the piston to rise within the housing and push the positioning pin into the positioning hole of the workpiece. Then, the diameter of the positioning pin is increased by the expansion assembly, so that the side wall of the positioning pin abuts against the positioning hole of the workpiece, thus positioning the workpiece. After processing, the piston is lowered through the second air inlet, restoring the device and removing the positioning pin from the positioning hole. This minimizes the need for operators to lift the workpiece, fit the positioning hole of the workpiece onto the pressing component, and directly transport the workpiece above the pressing component for positioning, thus avoiding the problem of reduced work efficiency.

[0009] Preferably, the expansion assembly includes a piston block slidably disposed at the top end of the connecting pipe, a push-pull rod fixedly connected to the top end of the piston block, the end of the push-pull rod away from the piston block passing through the piston and slidably disposed within the positioning pin, four annular array expansion blocks slidably connected to the side wall of the positioning pin, four guide bevels adapted to the expansion blocks being opened on the side wall of the push-pull rod, and a third air inlet for pushing the piston block to move being opened at the top end of one side wall of the connecting pipe, the third air inlet being located below the piston.

[0010] By adopting the above technical solution, after the positioning pin is pushed into the workpiece, gas is introduced into the space between the piston and the piston block through the third air inlet, which pushes the piston block to move downward in the connecting pipe, drives the push-pull rod to move downward, causes the guide bevel to move downward and squeeze the expansion block, moves the expansion block outward on the positioning pin, increases the diameter of the positioning pin, and positions and fixes the workpiece.

[0011] Preferably, the first spring inside the connecting tube has its bottom end fixedly connected to the fixing plate and its top end fixedly connected to the piston block.

[0012] By adopting the above technical solution, the first spring can push the piston block to rise in the connecting pipe during the piston component's ascent, preventing the piston block from falling in the connecting pipe during the piston component's ascent, causing the expansion block to move out of the positioning pin, which would make it difficult for the positioning pin to be inserted into the positioning hole.

[0013] Preferably, a first support ring is fixedly connected to the upper surface of the fixed plate, and the first air inlet is located on one side of the first support ring.

[0014] By adopting the above technical solution, the first support ring can prevent the bottom end of the piston from sticking to the fixed plate, making it difficult for gas to enter through the first air inlet and raise the piston.

[0015] Preferably, a second support ring is fixedly connected to the top of the inner part of the housing, the bottom end of the second support ring abuts against the piston, and the second air inlet is located on one side of the second support ring.

[0016] By adopting the above technical solution, the second support ring can prevent the top of the piston from sticking to the housing, making it difficult for gas to enter through the second air inlet, thus lowering the piston.

[0017] Preferably, a fixing ring is fixedly connected to the top of the piston, and four second springs in an annular array are fixedly connected to one side wall of the fixing ring. The second springs are respectively fixedly connected to the expansion block.

[0018] By adopting the above technical solution, during the process of supplying gas to the housing through the second air inlet, the exhaust from the first air inlet causes the first spring to rebound, pushing the push-pull rod upward so that the guide bevel is aligned with the expansion block. The rebound of the second spring can push the expansion block into the guide bevel, allowing the expansion block to return to its original position and preventing the expansion block from extending outside the positioning pin.

[0019] Preferably, each of the second springs is provided with a telescopic rod, and the two ends of the telescopic rod are respectively fixedly connected to the expansion block and the fixing ring.

[0020] By adopting the above technical solution, the telescopic rod can prevent the second spring from bending and being damaged when the expansion block squeezes it.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. This application utilizes the cooperative arrangement of structures such as a fixed plate, connecting pipe, and piston component. During use, the device is installed, allowing the workpiece to move directly above the housing. Gas is supplied into the housing through the first air inlet, causing the piston component to rise within the housing and push the positioning pin into the positioning hole of the workpiece. Then, the diameter of the positioning pin is increased by the expansion assembly, causing the side wall of the positioning pin to abut against the positioning hole of the workpiece for positioning. After processing, the piston component is lowered through the second air inlet, restoring the device and removing the positioning pin from the positioning hole. This minimizes the need for operators to lift the workpiece, fit the positioning hole of the workpiece onto the pressing component, and directly transport the workpiece above the pressing component for positioning, thus reducing work efficiency.

[0023] 2. The first spring can push the piston block to rise in the connecting pipe during the piston component's ascent, preventing the piston block from falling in the connecting pipe during the piston component's ascent, causing the expansion block to move out of the positioning pin, which would make it difficult for the positioning pin to be inserted into the positioning hole. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of the lifting-type diameter expansion positioning device according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram illustrating the internal structure of the shell, representing a key embodiment of this application.

[0026] Figure 3 The embodiments of this application mainly embody Figure 2 A schematic diagram of the enlarged structure of region A in the middle;

[0027] Figure 4 The embodiments of this application mainly embody Figure 2 A schematic diagram of the enlarged structure of region B in the middle.

[0028] Reference numerals: 1. Housing; 2. Positioning pin; 3. Fixing plate; 4. Connecting pipe; 5. Piston; 6. First air inlet; 7. First spring; 8. Piston block; 9. Push-pull rod; 10. Expansion block; 11. Guide bevel; 12. Third air inlet; 13. First support ring; 14. Second support ring; 15. Second air inlet; 16. Fixing ring; 17. Second spring; 18. Telescopic rod. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0030] This application discloses a lifting-type diameter expansion positioning device.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The lifting-type diameter expansion positioning device includes a housing 1 and a positioning pin 2. The housing 1 is provided with a lifting assembly for driving the positioning pin 2 to move. The lifting assembly includes a fixing plate 3, a connecting pipe 4, a piston 5, a first air inlet 6, and a second air inlet 15.

[0032] The fixing plate 3 is fixedly connected to the bottom of the inner part of the housing 1, the connecting pipe 4 is fixedly connected to the upper surface of the fixing plate 3, the piston 5 is installed inside the housing 1 and sleeved on the connecting pipe 4, the top end of the piston 5 extends out of the housing 1 and is connected to the positioning pin 2, the first air inlet 6 is opened at the bottom of one side wall of the housing 1 and is located below the piston 5, so that gas enters the housing 1 and pushes the piston 5 upward, the second air inlet 15 is opened at the top of one side wall of the housing 1 and is located above the piston 5, so that gas enters the housing 1 and pushes the piston 5 downward, and the positioning pin 2 and the connecting pipe 4 are provided with a diameter expansion assembly for expanding the diameter of the positioning pin 2.

[0033] Reference Figure 2 and Figure 3The expansion assembly includes a piston block 8 slidably disposed at the top of the inside of the connecting pipe 4. A push-pull rod 9 is fixedly connected to the top of the piston block 8. The end of the push-pull rod 9 away from the piston block 8 passes through the piston component 5 and is slidably disposed in the positioning pin 2. Four annular array expansion blocks 10 are slidably connected to the side wall of the positioning pin 2. Four guide bevels 11 adapted to the expansion blocks 10 are opened on the side wall of the push-pull rod 9. A third air inlet 12 for pushing the piston block 8 is opened at the top of one side wall of the connecting pipe 4. The third air inlet 12 is located below the piston component 5. After the positioning pin 2 is pushed into the workpiece, gas enters between the piston component 5 and the piston block 8 through the third air inlet 12, pushing the piston block 8 to move downward in the connecting pipe 4, driving the push-pull rod 9 to move downward, causing the guide bevels 11 to move downward and squeeze the expansion blocks 10, moving the expansion blocks 10 outward on the positioning pin 2, increasing the diameter of the positioning pin 2, and positioning and fixing the workpiece.

[0034] Reference Figure 2 The first spring 7 is located inside the connecting pipe 4. The bottom end of the first spring 7 is fixedly connected to the fixing plate 3, and the top end of the first spring 7 is fixedly connected to the piston block 8. The bottom end of the fixing plate 3 is provided with an exhaust hole that communicates with the connecting pipe 4. The first spring 7 can push the piston block 8 to rise in the connecting pipe 4 during the rising process of the piston 5, preventing the piston block 8 from falling in the connecting pipe 4 during the rising process of the piston 5, causing the expansion block 10 to move out of the positioning pin 2, making it difficult for the positioning pin 2 to be inserted into the positioning hole.

[0035] Reference Figure 2 A first support ring 13 is fixedly connected to the upper surface of the fixed plate 3. The first air inlet 6 is located on one side of the first support ring 13. The first support ring 13 can prevent the bottom end of the piston 5 from sticking to the fixed plate 3, making it difficult for gas to enter through the first air inlet 6 and thus raising the piston 5.

[0036] Reference Figure 2 and Figure 4 The top of the housing 1 is fixedly connected to a second support ring 14. The bottom of the second support ring 14 abuts against the piston 5. The second air inlet 15 is located on one side of the second support ring 14. The second support ring 14 can prevent the top of the piston 5 from sticking to the housing 1, making it difficult for gas to enter through the second air inlet 15, thus lowering the piston 5.

[0037] Reference Figure 1 and Figure 2A fixing ring 16 is fixedly connected to the top of the piston 5. Four ring-shaped arrays of second springs 17 are fixedly connected to one side wall of the fixing ring 16. The second springs 17 are fixedly connected to the expansion block 10. During the process of supplying gas to the housing 1 through the second air inlet 15, the first air inlet 6 exhausts gas, causing the first spring 7 to rebound and push the push rod 9 to rise, so that the guide bevel 11 is aligned with the expansion block 10. The rebound of the second spring 17 can push the expansion block 10 into the guide bevel 11, so that the expansion block 10 returns to its original position and prevents the expansion block 10 from extending outside the positioning pin 2.

[0038] Reference Figure 3 Each of the second springs 17 is equipped with a telescopic rod 18. The two ends of the telescopic rod 18 are fixedly connected to the expansion block 10 and the fixing ring 16, respectively. The telescopic rod 18 can prevent the second spring 17 from bending when the expansion block 10 squeezes it, thus preventing damage to the second spring 17.

[0039] The implementation principle of the lifting-type expansion positioning device in this application embodiment is as follows: During use, the device is installed so that the workpiece is directly moved above the housing 1. Gas is supplied to the housing 1 through the first air inlet 6, causing the piston 5 to rise within the housing 1. This pushes the positioning pin 2 into the positioning hole of the workpiece. After the positioning pin 2 is pushed into the workpiece, the piston 5 rises within the housing 1, connecting the third air inlet 12 to the interior of the housing 1. Gas then enters between the piston 5 and the piston block 8 through the third air inlet 12, pushing the piston block 8 downwards in the connecting pipe 4. This causes the push-pull rod 9 to move downwards, causing the guide bevel 11 to move downwards and compress the expansion block 10, moving the expansion block 10 outwards on the positioning pin 2, thus increasing the vertical position of the positioning pin 2. The workpiece is positioned using the diameter. After processing, during the process of supplying gas to the housing 1 through the second air inlet 15, the first air inlet 6 exhausts gas, causing the first spring 7 to rebound and push the push-pull rod 9 upward, aligning the guide bevel 11 with the expansion block 10. The rebound of the second spring 17 can push the expansion block 10 into the guide bevel 11, restoring the expansion block 10 and preventing it from extending outside the positioning pin 2. Then, the piston 5 is lowered to restore the device and remove the positioning pin 2 from the positioning hole. This method avoids the need for operators to lift the workpiece, place the positioning hole of the workpiece on the pressing part, and directly transport the workpiece above the pressing part for positioning, which would reduce work efficiency.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting-type diameter expansion positioning device, comprising a housing (1) and a positioning pin (2), wherein the housing (1) is provided with a lifting assembly for moving the positioning pin (2), characterized in that: The lifting assembly includes a fixing plate (3) fixedly connected to the bottom of the housing (1). A connecting pipe (4) is fixedly connected to the upper surface of the fixing plate (3). A piston (5) is installed inside the housing (1). The piston (5) is sleeved on the connecting pipe (4). The top end of the piston (5) extends out of the housing (1) and is connected to the positioning pin (2). A first air inlet (6) is opened at the bottom end of one side wall of the housing (1) below the piston (5). A second air inlet (15) is opened at the top end of one side wall of the housing (1) above the piston (5). An expansion assembly for expanding the diameter of the positioning pin (2) is provided on the positioning pin (2) and the connecting pipe (4).

2. The lifting-type diameter expansion positioning device according to claim 1, characterized in that: The expansion assembly includes a piston block (8) slidably disposed at the top end of the connecting pipe (4). A push-pull rod (9) is fixedly connected to the top end of the piston block (8). The end of the push-pull rod (9) away from the piston block (8) passes through the piston component (5) and is slidably disposed in the positioning pin (2). Four expansion blocks (10) in an annular array are slidably connected to the side wall of the positioning pin (2). Four guide bevels (11) adapted to the expansion blocks (10) are opened on the side wall of the push-pull rod (9). A third air inlet (12) for pushing the piston block (8) to move is opened at the top end of one side wall of the connecting pipe (4). The third air inlet (12) is located below the piston component (5).

3. The lifting-type diameter expansion positioning device according to claim 2, characterized in that: The first spring (7) is located inside the connecting tube (4). The bottom end of the first spring (7) is fixedly connected to the fixing plate (3), and the top end of the first spring (7) is fixedly connected to the piston block (8).

4. The lifting-type diameter expansion positioning device according to claim 3, characterized in that: The upper surface of the fixed plate (3) is fixedly connected to a first support ring (13), and the first air inlet (6) is located on one side of the first support ring (13).

5. The lifting-type diameter expansion positioning device according to claim 4, characterized in that: The top of the housing (1) is fixedly connected to a second support ring (14), the bottom of the second support ring (14) abuts against the piston (5), and the second air inlet (15) is located on one side of the second support ring (14).

6. The lifting-type diameter expansion positioning device according to claim 5, characterized in that: The piston (5) is fixedly connected to a fixing ring (16) at its top end. Four second springs (17) in an annular array are fixedly connected to one side wall of the fixing ring (16). The second springs (17) are fixedly connected to the expansion block (10) respectively.

7. The lifting-type diameter expansion positioning device according to claim 6, characterized in that: Each of the second springs (17) is provided with a telescopic rod (18), and the two ends of the telescopic rod (18) are fixedly connected to the expansion block (10) and the fixing ring (16) respectively.

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