Positioning pin

Abstract

The utility model relates to the field of pins, and discloses a positioning pin which is provided with a protection assembly, the protection assembly comprises a threaded sleeve A, a pressing block fixedly arranged above the threaded sleeve A, a threaded sleeve B fixedly arranged above the positioning pin, a sealing gasket and a convex ring A fixedly arranged below the sealing gasket, and the diameter of the threaded sleeve B is smaller than that of the positioning pin. A groove A matched with the protruding ring A is formed in the top wall of the threaded sleeve B. After the protruding ring A is inserted into the groove A, the sealing gasket and the protruding ring A are both in contact connection with the threaded sleeve B. After the threaded sleeve A is screwed into the threaded sleeve B, the sealing gasket and the protruding ring A are fixed between the pressing block and the threaded sleeve B. The internal thread positioning pin has the beneficial effect that the positioning pin can be conveniently taken out, and the problems that the screw hole of the internal thread positioning pin is usually exposed outside, impurities such as external dust or chippings can enter the screw hole to block the screwing path of a screw, and water can easily enter the screw hole to rust a thread, so that the screw cannot be normally screwed in are solved; and the positioning pin is inconvenient to take out.

Description

Technical Field

[0001] The utility model relates to the field of pins, in particular to a positioning pin. Background Art

[0002] A locating pin is a component used to secure the relative position of parts in mechanical assembly. It is typically made of hard metal, offering high wear resistance and strength. Its primary function is to secure parts in place during assembly, preventing them from moving or rotating, thereby improving assembly efficiency.

[0003] Dowel pins often have an interference fit during installation, which can easily lead to overtightening and difficulty in removal. In such cases, internally threaded dowel pins should be used to avoid this problem. However, the screw hole of an internally threaded dowel pin is usually exposed to the outside, and impurities such as dust or debris can enter the screw hole, blocking the screw insertion path. Moisture can also easily enter the screw hole, causing the threads to rust, which can prevent the screw from being screwed in properly and make it difficult to remove the dowel pin. Utility Model Content

[0004] The purpose of the present invention is to provide a positioning pin to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning pin, comprising a positioning pin, a screw hole being provided on the top wall of the positioning pin, characterized in that: a protective component is provided on the positioning pin, the protective component comprising a threaded sleeve A, a pressure block fixedly arranged above the threaded sleeve A, a threaded sleeve B fixedly arranged above the positioning pin, a sealing gasket, and a convex ring A fixedly arranged below the sealing gasket, the diameter of the threaded sleeve B being smaller than the diameter of the positioning pin, a groove A matching the convex ring A being provided on the top wall of the threaded sleeve B, after the convex ring A is inserted into the groove A, the sealing gasket and the convex ring A are both in contact and connected with the threaded sleeve B, and after the threaded sleeve A is screwed into the threaded sleeve B, the sealing gasket and the convex ring A are fixed between the pressure block and the threaded sleeve B.

[0006] Preferably, a convex ring B is fixedly provided under the pressure block, and a groove B matching the convex ring B is provided on the top wall of the sealing gasket. The groove B is located directly above the convex ring A. After the threaded sleeve A is screwed into the threaded sleeve B, the convex ring B is inserted into the groove B and fixedly connected to the sealing gasket.

[0007] Preferably, the top wall of the positioning pin is provided with a plurality of oil filling holes A located outside the threaded sleeve B and arranged in a circumferential pattern, and the outer side wall of the positioning pin is provided with a plurality of oil filling holes B connected with the oil filling holes A, and the oil filling holes B are arranged to be tilted downward.

[0008] Preferably, the protective assembly further comprises an extension sleeve, a plurality of plug-in blocks are fixedly provided below the extension sleeve, a plurality of slots matching the plug-in blocks are provided on the top wall of the pressure block, and the plug-in blocks are inserted into the slots and connected with the pressure block by interference fit.

[0009] Preferably, a hexagonal groove is provided on the top wall of the pressing block, the inner hole of the extension sleeve matches the hexagonal groove, and the outer sides of the threaded sleeve A, the pressing block and the extension sleeve are all provided with anti-slip grooves.

[0010] Preferably, the bottom of the positioning pin is round.

[0011] Preferably, the surface of the round head at the bottom of the positioning pin is alloy-hardened, and the materials of the sealing gasket and the convex ring A are both nitrile rubber.

[0012] The beneficial effects of the utility model are as follows: when the utility model is used, the sealing gasket is placed above the threaded sleeve B, the convex ring A is inserted into the groove A, so that the sealing gasket and the convex ring A are both in contact with and connected to the threaded sleeve B, the threaded sleeve A is screwed into the threaded sleeve B, so that the sealing gasket and the convex ring A are fixed between the pressure block and the threaded sleeve B, which plays a role in sealing the screw hole and preventing external impurities or moisture from entering the screw hole; when the locating pin needs to be removed, the threaded sleeve A is screwed out of the threaded sleeve B, so that the threaded sleeve A and the sealing gasket are separated from the threaded sleeve B, the screw is screwed into the screw hole and fixedly connected to the locating pin, and lubricating oil is added to the oil filling hole A , so that the lubricating oil flows through the oil filling hole A and the oil filling hole B and then flows into the connection between the locating pin and the part, lubricating the connection and saving effort. Then, the screw is pulled out to remove the locating pin, which makes it easy to remove the locating pin. In summary, the utility model has the beneficial effect of facilitating the removal of the locating pin, and solves the problem that the screw hole of the internal threaded locating pin is usually exposed to the outside, and foreign dust or debris and other impurities will enter the screw hole, blocking the screw insertion path, and moisture can easily enter the screw hole, causing the thread to rust, resulting in the screw cannot be screwed in normally, making it inconvenient to remove the locating pin. ‌ BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a structural diagram of the utility model;

[0014] Attachment Figure 2 This is an explosion diagram of the utility model;

[0015] Attachment Figure 3 It is a top view of the utility model;

[0016] Attachment Figure 4 For attachment Figure 3 Cross-sectional view at AA in the middle.

[0017] In the figure: 1. Locating pin; 2. Screw hole; 3. Threaded sleeve A; 4. Pressure block; 5. Threaded sleeve B; 6. Sealing gasket; 7. Raised ring A; 8. Groove A; 9. Raised ring B; 10. Groove B; 11. Oil filling hole A; 12. Oil filling hole B; 13. Extension sleeve; 14. Insert block; 15. Slot; 16. Hexagonal groove; 17. Anti-slip groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1-4 As shown, the utility model discloses a locating pin, including a locating pin 1, a screw hole 2 is provided on the top wall of the locating pin 1, a protective assembly is provided on the locating pin 1, and the protective assembly includes a threaded sleeve A3, a pressure block 4 fixedly arranged above the threaded sleeve A3, a threaded sleeve B5 fixedly arranged above the locating pin 1, a sealing gasket 6, and a convex ring A7 fixedly arranged below the sealing gasket 6, the diameter of the threaded sleeve B5 is smaller than the diameter of the locating pin 1, a groove A8 matching the convex ring A7 is provided on the top wall of the threaded sleeve B5, after the convex ring A7 is inserted into the groove A8, the sealing gasket 6 and the convex ring A7 are both in contact and connected with the threaded sleeve B5, and after the threaded sleeve A3 is screwed into the threaded sleeve B5, the sealing gasket 6 and the convex ring A7 are fixed between the pressure block 4 and the threaded sleeve B5. When the utility model is used, the sealing gasket 6 is placed above the threaded sleeve B5, and the convex ring A7 is inserted into the groove A8, so that the sealing gasket 6 and the convex ring A7 are in contact with and connected to the threaded sleeve B5, and the threaded sleeve A3 is screwed into the threaded sleeve B5, so that the sealing gasket 6 and the convex ring A7 are fixed between the pressure block 4 and the threaded sleeve B5, which plays the role of sealing the screw hole 2 and preventing external impurities or moisture from entering the screw hole 2; when it is necessary to remove the locating pin 1, the threaded sleeve A3 is screwed out of the threaded sleeve B5, so that the threaded sleeve A3 and the sealing gasket 6 are separated from the threaded sleeve B5, and the screw is screwed into the screw hole 2 to be fixedly connected to the locating pin 1, and lubricating oil is added to the oil filling hole A11. The lubricating oil flows through the oil filling holes A11 and B12 and then flows into the connection between the locating pin 1 and the part, lubricating the connection and saving effort. Then, the locating pin 1 is pulled out by pulling the screw, making it easy to remove the locating pin 1. In summary, the present invention has the beneficial effect of facilitating the removal of the locating pin 1. It solves the problem that the screw hole 2 of the internally threaded locating pin 1 is usually exposed to the outside, and foreign dust, debris and other impurities may enter the screw hole 2 and block the screw insertion path. Moisture can also easily enter the screw hole 2, causing the thread to rust, resulting in the screw being unable to be screwed in normally, making it inconvenient to remove the locating pin 1.

[0020] Preferably, a raised ring B9 is fixedly provided below the pressure block 4, and a groove B10 matching the raised ring B9 is defined on the top wall of the sealing gasket 6. The groove B10 is located directly above the raised ring A7. After the threaded sleeve A3 is screwed into the threaded sleeve B5, the raised ring B9 is inserted into the groove B10 and fixedly connected to the sealing gasket 6. Since the groove B10 is located directly above the raised ring A7, when the threaded sleeve A3 is screwed into the threaded sleeve B5, the raised ring B9 is inserted into the groove B10 and fixedly connected to the sealing gasket 6. The raised ring B9 compresses the raised ring A7, further fixing it to the bottom wall of the groove A8, thereby enhancing the sealing performance.

[0021] Preferably, the top wall of the locating pin 1 is provided with a plurality of oil injection holes A11 located outside the threaded sleeve B5 and arranged in a circumferential pattern. The outer wall of the locating pin 1 is provided with a plurality of oil injection holes B12 connected to the oil injection holes A11, and the oil injection holes B12 are arranged downwardly at an angle. Since the outer wall of the locating pin 1 is provided with a plurality of oil injection holes B12 connected to the oil injection holes A11, lubricating oil is added to the oil injection holes A11, and the lubricating oil flows through the oil injection holes A11 and the oil injection holes B12 and then flows into the connection between the locating pin 1 and the component, lubricating the connection and saving effort when removing the locating pin 1. Since the oil injection holes B12 are arranged downwardly at an angle, the lubricating oil is facilitated to flow out.

[0022] Preferably, the protective assembly further comprises an extension sleeve 13, a plurality of insert blocks 14 being fixedly mounted below the extension sleeve 13. The top wall of the pressure block 4 is provided with a plurality of slots 15 matching the insert blocks 14. The insert blocks 14 are inserted into the slots 15 and connected to the pressure block 4 through an interference fit. Since the top wall of the pressure block 4 is provided with a plurality of slots 15 matching the insert blocks 14, the insert blocks 14 are inserted into the slots 15 and connected to the pressure block 4 through an interference fit, thereby securing the extension sleeve 13 to the pressure block 4. The diameters of the threaded sleeve A3, the pressure block 4, and the extension sleeve 13 are all the same as the diameter of the locating pin 1, thereby extending the positioning length of the locating pin 1.

[0023] Preferably, a hexagonal groove 16 is formed on the top wall of the pressing block 4, and the inner hole of the extension sleeve 13 matches the hexagonal groove 16. The outer sides of the threaded sleeve A3, the pressing block 4, and the extension sleeve 13 are all provided with anti-slip grooves 17. The hexagonal groove 16 formed on the top wall of the pressing block 4 facilitates the removal of the threaded sleeve A3 using a hexagonal wrench. The anti-slip grooves 17 formed on the outer sides of the threaded sleeve A3, the pressing block 4, and the extension sleeve 13 prevent slipping during manual removal.

[0024] Preferably, the bottom of the positioning pin 1 is provided with a round head. Since the bottom of the positioning pin 1 is provided with a round head, it is convenient for the positioning pin 1 to be inserted into the positioning hole.

[0025] Preferably, the bottom round head of the positioning pin 1 is hardened with alloy, and the sealing gasket 6 and the convex ring A7 are both made of nitrile rubber. Since the bottom round head of the positioning pin 1 is hardened with alloy, it has high strength and hardness; since the sealing gasket 6 and the convex ring A7 are both made of nitrile rubber, they have good sealing and wear resistance.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positioning pin, comprising a positioning pin (1), wherein a screw hole (2) is provided on the top wall of the positioning pin (1), and wherein: The positioning pin (1) is provided with a protective assembly, which includes a threaded sleeve A (3), a pressure block (4) fixedly arranged above the threaded sleeve A (3), a threaded sleeve B (5) fixedly arranged above the positioning pin (1), a sealing gasket (6), and a convex ring A (7) fixedly arranged below the sealing gasket (6). The diameter of the threaded sleeve B (5) is smaller than the diameter of the positioning pin (1). A groove A (8) matching the convex ring A (7) is provided on the top wall of the threaded sleeve B (5). After the convex ring A (7) is inserted into the groove A (8), the sealing gasket (6) and the convex ring A (7) are both in contact with and connected to the threaded sleeve B (5). After the threaded sleeve A (3) is screwed into the threaded sleeve B (5), the sealing gasket (6) and the convex ring A (7) are fixed between the pressure block (4) and the threaded sleeve B (5).

2. A positioning pin according to claim 1, characterized in that: A convex ring B (9) is fixedly provided below the pressure block (4), and a groove B (10) matching the convex ring B (9) is provided on the top wall of the sealing gasket (6). The groove B (10) is located directly above the convex ring A (7). After the threaded sleeve A (3) is screwed into the threaded sleeve B (5), the convex ring B (9) is inserted into the groove B (10) and fixedly connected to the sealing gasket (6).

3. The positioning pin according to claim 1, wherein: The top wall of the positioning pin (1) is provided with a plurality of oil filling holes A (11) which are located outside the threaded sleeve B (5) and are arranged in a circumferential manner. The outer wall of the positioning pin (1) is provided with a plurality of oil filling holes B (12) which are connected to the oil filling holes A (11). The oil filling holes B (12) are arranged to be inclined downward.

4. The positioning pin according to claim 1, wherein: The protective assembly further comprises an extension sleeve (13), a plurality of insert blocks (14) are fixedly arranged below the extension sleeve (13), a plurality of slots (15) matching the insert blocks (14) are provided on the top wall of the pressure block (4), and the insert blocks (14) are inserted into the slots (15) and connected to the pressure block (4) by interference fit.

5. A positioning pin according to claim 4, characterized in that: A hexagonal groove (16) is provided on the top wall of the pressing block (4), and the inner hole of the extension sleeve (13) matches the hexagonal groove (16). The outer sides of the threaded sleeve A (3), the pressing block (4) and the extension sleeve (13) are all provided with anti-slip grooves (17).

6. The positioning pin according to claim 1, characterized in that: The bottom of the positioning pin (1) is provided with a round head.

7. A positioning pin according to claim 6, characterized in that: The bottom round head of the positioning pin (1) is made of alloy hardened surface, and the sealing gasket (6) and the convex ring A (7) are both made of nitrile rubber.

Images