Positioning pin with good sealing performance

Abstract

The utility model provides a positioning pin with good sealing performance, which belongs to the technical field of positioning pins and comprises a pin rod, a pin cap and a positioning pin head, the pin cap and the positioning pin head are arranged at two ends of the pin rod, through grooves communicated with each other are arranged in the pin rod and the pin cap in a penetrating manner, and piston rods for pushing the positioning pin head to bend are arranged in the through grooves. The top of the pin cap is in threaded connection with a sealing cover for sealing the through groove, a sealing ring is arranged between the sealing cover and the pin cap, a wear-resisting layer is laid on the outer wall of the pin rod, the pin rod is sleeved with a gasket, a second sealing gasket is arranged between the gasket and the pin cap, and the part, at the bottom of the gasket, of the pin rod is sleeved with a first sealing gasket. The sealing cover and the wear-resistant layer are arranged, the positioning pin and the positioning hole are tightly combined through the sealing cover, the wear-resistant layer and the multiple sealing gaskets, the overall sealing performance of the positioning pin is improved, and the phenomenon that the positioning pin is damaged due to the fact that the positioning pin is eroded by external air is avoided.

Description

Technical Field

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

[0002] Pins are a type of positioning pins. Pins are usually used to ensure the relative position of two objects (such as workpieces or fixtures) in space. This is achieved by limiting their movement on the X and Y axes. The design of pins takes into account the need for repeated positioning, so their shape and hardness are very important. Pins can be used in combination with fixture bushings to achieve more precise positioning. However, the existing pins have insufficient positioning force, the positioning structure is not reliable, and they are easy to fall off during use, and they can also cause damage to the parts to be positioned.

[0003] In order to address the above problems, a Chinese patent with the existing announcement number CN216788925U proposes a positioning pin, which is inserted into the second through hole and the first through hole in sequence through a piston rod, and then the piston rod slides toward the pin head through hole in the first through hole. After the piston rod passes through the first through hole, it presses against the bottom ends of the left and right pin heads, and continues to push the piston rod to move toward the top end of the pin head through hole in the pin head through hole, so that the left and right pin heads are forced to separate and then bent for positioning.

[0004] However, although the above-mentioned positioning pin can pass through the second through hole and the first through hole through the piston rod and push the left and right pin heads to separate under force, and then bend and position, thereby ensuring the stability of the positioning pin, the positioning pin has a reduced sealing performance due to the setting of the first through hole and the second through hole, resulting in the internal erosion of the pin by external air after long-term use, thereby causing damage to the positioning pin. Therefore, the utility model provides a positioning pin with good sealing performance to meet the needs. Utility Model Content

[0005] The utility model aims to solve the problems existing in the above-mentioned background technology and proposes a positioning pin with good sealing performance.

[0006] The technical problem to be solved by the utility model is to provide a positioning pin with good sealing performance to solve the problem that the sealing performance of the existing positioning pin is reduced due to the opening of a through hole, resulting in the internal part of the positioning pin being corroded by external air after long-term use, thereby causing damage to the positioning pin.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A positioning pin with good sealing performance comprises: a pin rod and a pin cap and a positioning pin head arranged at both ends of the pin rod, the pin rod and the pin cap are penetrated by through grooves that are interconnected, the through groove is provided with a piston rod that pushes the positioning pin head to bend, the top of the pin cap is threadedly connected with a sealing cover that seals the through groove, a sealing ring is provided between the sealing cover and the pin cap, the outer wall of the pin rod is paved with a wear-resistant layer, a gasket is sleeved on the pin rod, a sealing gasket 2 is provided between the gasket and the pin cap, and a sealing gasket 1 is sleeved on the pin rod at the bottom of the gasket.

[0009] Preferably, a placement groove is provided on the pin cap, and a level tube is horizontally fixedly connected in the placement groove.

[0010] Preferably, a perspective plate for shielding the placement groove is fixedly connected to the pin cap.

[0011] Preferably, the perspective plate is tempered glass.

[0012] Preferably, the diameter of the gasket is larger than the diameters of the pin cap, the first sealing gasket and the second sealing gasket.

[0013] Preferably, the wear-resistant layer is a chrome-plated layer.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, by providing a sealing cover, a wear-resistant layer, and a plurality of sealing gaskets, a tight combination between the locating pin and the locating hole is achieved, thereby improving the overall sealing of the locating pin and preventing the locating pin from being damaged by external air.

[0016] In the above scheme, by providing a level tube and a perspective plate, the level tube can facilitate the user to position the locating pin, ensure that the locating pin can be accurately connected with the locating hole at the installation position, avoid the deviation of the locating pin, and improve the sealing of the locating pin and the locating hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 It is a partial structural schematic diagram of the through groove and the sealing cover of the utility model;

[0022] Figure 5 It is a partial structural schematic diagram of the piston rod of the utility model.

[0023] [reference numerals]

[0024] 1. Pin rod; 2. Pin cap; 3. Gasket; 4. Sealing gasket 1; 5. Sealing gasket 2; 6. Piston rod; 7. Sealing cover; 8. Positioning pin head; 9. Through groove; 10. Wear-resistant layer; 11. Placement groove; 12. Level tube; 13. Perspective plate; 14. Sealing ring. DETAILED DESCRIPTION

[0025] like Figures 1 to 5 As shown, an embodiment of the utility model provides a positioning pin with good sealing performance, including a pin rod 1 and a pin cap 2 and a positioning pin head 8 arranged at both ends of the pin rod 1, the pin rod 1 and the pin cap 2 are penetrated by through grooves 9 that are interconnected, the through groove 9 is provided with a piston rod 6 that pushes the positioning pin head 8 to bend, the top of the pin cap 2 is threadedly connected with a sealing cover 7 that seals the through groove 9, a sealing ring 14 is provided between the sealing cover 7 and the pin cap 2, the outer wall of the pin rod 1 is paved with a wear-resistant layer 10, a gasket 3 is sleeved on the pin rod 1, a sealing gasket 2 5 is provided between the gasket 3 and the pin cap 2, and a sealing gasket 1 4 is sleeved on the pin rod 1 at the bottom of the gasket 3.

[0026] Specifically, by moving the pin rod 1 and the positioning pin head 8 to the specified position and applying pressure to the pin cap 2, the pin rod 1 and the positioning pin head 8 are inserted into the specified position. At this time, the pin cap 2 can be tightly connected to the position through the rubber pad 1, the rubber pad 2 and the gasket 3, thereby increasing the sealing of the positioning pin and preventing the positioning pin from being damaged by external air. Then, by inserting the piston rod 6 into the through groove 9, the positioning pin head 8 is expanded and positioned, and then the sealing cover 7 and the sealing ring 14 are used to seal the through groove 9, so that the positioning pin and the positioning hole are tightly combined, thereby improving the overall sealing of the positioning pin, and solving the problem that the existing positioning pin has a through hole, which reduces its sealing performance, resulting in the internal erosion of the external air after long-term use, thereby causing damage to the positioning pin.

[0027] It should be noted that the wear-resistant layer 10 can increase the wear resistance and smoothness of the pin rod 1, so that it can be tightly combined with the installation position and reduce the generation of gaps; in this embodiment, the locating pin includes a pin rod 1, a pin cap 2, a locating pin head 8 and a piston rod 6.

[0028] like Figure 3As shown, in the present embodiment, a placement groove 11 is opened on the pin cap 2, a spirit level 12 is horizontally fixedly connected in the placement groove 11, a perspective plate 13 for shielding the placement groove 11 is fixedly connected to the pin cap 2, and the perspective plate 13 is tempered glass. Specifically, the provision of the spirit level 12 can facilitate the user to realize the positioning of the locating pin, ensure that the locating pin can be accurately connected with the locating hole at the installation position, avoid the phenomenon of the locating pin being offset, and improve the sealing of the locating pin and the locating hole.

[0029] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the diameter of the gasket 3 is greater than the diameters of the pin cap 2, the sealing gasket 1 4 and the sealing gasket 2 5.

[0030] like Figure 2 As shown, in this embodiment, the wear-resistant layer 10 is a chrome-plated layer. Chrome plating is a common surface treatment method, which can significantly improve the corrosion resistance and wear resistance of the locating pin. The chrome-plated layer has high hardness and good chemical stability, and can effectively extend the service life of the locating pin. Furthermore, the wear-resistant layer 10 can also be a titanium-plated layer, an anti-corrosion coating, etc.

[0031] Working principle:

[0032] By moving the pin rod 1 and the positioning pin head 8 to the specified position and applying pressure to the pin cap 2, the pin rod 1 and the positioning pin head 8 are inserted into the specified position. At this time, the pin cap 2 can be tightly connected to the position through the rubber pad 1, the rubber pad 2 and the gasket 3, thereby increasing the sealing of the positioning pin and preventing the positioning pin from being damaged by external air. Then, by inserting the piston rod 6 into the through groove 9, the positioning pin head 8 is expanded and positioned, and then the sealing cover 7 and the sealing ring 14 are used to seal the through groove 9, so that the positioning pin and the positioning hole are tightly combined, thereby improving the overall sealing of the positioning pin, and solving the problem that the existing positioning pin has a through hole, which reduces its sealing performance, resulting in the internal erosion of the outside air after long-term use, thereby causing damage to the positioning pin.

Claims

1. A positioning pin with good sealing performance, comprising a pin rod (1) and a pin cap (2) and a positioning pin head (8) arranged at both ends of the pin rod (1), wherein the pin rod (1) and the pin cap (2) are provided with a through groove (9) which is connected to each other, and a piston rod (6) is provided in the through groove (9) for pushing the positioning pin head (8) to bend, characterized in that: The top of the pin cap (2) is threadedly connected with a sealing cover (7) for sealing the through groove (9), and a sealing ring (14) is provided between the sealing cover (7) and the pin cap (2); The outer wall of the pin rod (1) is paved with a wear-resistant layer (10), a gasket (3) is sleeved on the pin rod (1), a second sealing gasket (5) is provided between the gasket (3) and the pin cap (2), and a first sealing gasket (4) is sleeved on the pin rod (1) at the bottom of the gasket (3).

2. The positioning pin with good sealing performance according to claim 1, characterized in that: The pin cap (2) is provided with a placement groove (11), and a level tube (12) is horizontally fixedly connected in the placement groove (11).

3. The positioning pin with good sealing performance according to claim 2, characterized in that: A perspective plate (13) for shielding the placement groove (11) is fixedly connected to the pin cap (2).

4. The positioning pin with good sealing performance according to claim 3, characterized in that: The perspective plate (13) is made of tempered glass.

5. The positioning pin with good sealing performance according to claim 1, characterized in that: The diameter of the gasket (3) is greater than the diameters of the pin cap (2), the sealing gasket 1 (4) and the sealing gasket 2 (5).

6. The positioning pin with good sealing performance according to claim 1, characterized in that: The wear-resistant layer (10) is a chrome-plated layer.

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