Polishing protection device for outer circle of piston rod

Abstract

The utility model relates to the technical field of piston rod machining, in particular to a piston rod outer circle polishing protection device which comprises an upper connecting plate, a lower connecting plate and a blanking cap, the blanking cap is installed at one end of the piston rod, the other end of the piston rod is sleeved with the lower connecting plate, and the end, away from the piston rod, of the lower connecting plate is connected with the upper connecting plate. The end, away from the lower connecting plate, of the upper connecting plate is connected with external preset polishing equipment. The protection device can protect a non-polished surface, the protection of the non-polished surface is completed through the blanking cap and the lower connecting plate, and the situation that the final polishing effect is affected due to the fact that the piston rod is stressed to generate autorotation in the rotary polishing operation of equipment can be effectively prevented. The polishing device can be used in combination with polishing equipment, the manual polishing operation mode is omitted, the consistency and stability of polishing quality can be guaranteed, the production efficiency is improved, the product delivery cycle can be guaranteed, and the purposes of reducing cost and increasing efficiency are finally achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of protective devices, specifically to a kind of piston rod external circle polishing protective device, belong to piston rod processing field. BACKGROUND

[0002] Piston rod needs to be polished to local surface treatment area before surface treatment, to ensure that its surface roughness meets the surface treatment requirement.The traditional shaft part polishing method is to clamp the part on lathe, and the operator polishes the polishing area with sandpaper, resulting in uneven surface roughness of the piston rod, which cannot guarantee the stability of polishing quality, directly affects the surface plating effect, resulting in relatively long product delivery cycle, which is not conducive to the improvement of production efficiency, and the manual polishing operation of the piston rod needs to be optimized and improved.The grinding and polishing equipment in production site can complete the polishing processing of product inner and outer surface in batches, but cannot polish the product in part area, which is easy to cause damage to the non-polished surface of the product. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides a kind of piston rod external circle polishing protective device.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] A kind of piston rod external circle polishing protective device, including upper connecting plate, lower connecting plate and plug cover, the plug cover is installed in one end of piston rod, the other end of piston rod is sleeved in the inside of lower connecting plate, the end of lower connecting plate away from piston rod is connected with upper connecting plate, the end of upper connecting plate away from lower connecting plate is connected with the polishing equipment of external preset.

[0006] Optionally, the piston rod includes a fixed end and a polishing area, and the plug cover is installed at the end away from the fixed end of the piston rod.

[0007] Optionally, the plug cover is connected with a protruding column at one end, the outer wall of the protruding column is provided with external threads, and the protruding column is inserted into the inside of one end of the piston rod and connected with the internal threads of the inner wall of the end of the piston rod through the external threads.

[0008] Optionally, the lower connecting plate and the upper connecting plate are both provided in a "convex" shape, the base ends of the lower connecting plate and the upper connecting plate are butted at the bottom, and a plurality of fourth inner holes and a plurality of first inner holes are respectively formed in the edge of the base end bottom of the lower connecting plate and the upper connecting plate, and when the lower connecting plate and the upper connecting plate are connected, one end of the bolt is threaded with a nut through the fourth inner hole and the first inner hole.

[0009] Optionally, the lower connecting plate has a through hole inside, which consists of a limiting hole and a sixth inner hole. The sixth inner hole is opened on the protruding end of the lower connecting plate and extends inward to communicate with the limiting hole. The end of the limiting hole away from the sixth inner hole passes through the protruding end and the base end of the lower connecting plate. The inner diameter of the limiting hole is larger than the inner diameter of the sixth inner hole.

[0010] Optionally, the base end of the upper connecting plate is provided with a fifth inner hole, the protruding end of the upper connecting plate is provided with a second inner hole, and two third inner holes are provided on both sides of the outer wall of the protruding end of the upper connecting plate, the third inner holes penetrating the outer wall of the protruding end and communicating with the second inner hole.

[0011] Optionally, when the piston rod is installed with the lower connecting plate, the polished area of ​​the piston rod passes through the limiting hole and the sixth inner hole, and the fixed end is installed inside the limiting hole and the sixth inner hole. The outer side of the inner end of the limiting hole away from the second inner hole and the outer side of the fixed end away from the polished area are both non-cylindrical surfaces.

[0012] Optionally, after the lower connecting plate is installed with the upper connecting plate and the piston rod, one end of the fixed end of the piston rod extends into the fifth inner hole of the upper connecting plate, and a 0.1mm gap is reserved between the outer wall of the fixed end and the inner wall of the fifth inner hole, a 0.5mm gap is reserved between the end of the fixed end and the inner end of the fifth inner hole, and a 0.1mm gap is reserved between the outer wall of the fixed end and the inner wall of the limiting hole and the sixth inner hole.

[0013] The beneficial effects of this utility model are:

[0014] This protective device safeguards non-polished surfaces through a plug and lower connecting plate. It also effectively prevents the piston rod from rotating during rotary polishing operations, thus avoiding any impact on the final polishing result. It can be used in conjunction with polishing equipment, eliminating manual polishing and ensuring consistent and stable polishing quality. This improves production efficiency, guarantees product delivery time, and ultimately achieves cost reduction and efficiency improvement. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the installation structure of the piston rod and protective device of this utility model.

[0017] Figure 2 This is a schematic diagram of the piston rod structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the upper connecting plate structure of this utility model.

[0019] Figure 4This is a schematic diagram of the lower connecting plate structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the plug structure of this utility model.

[0021] In the diagram: 1. Upper connecting plate; 2. Lower connecting plate; 3. Plug; 4. Bolt; 5. Nut; 6. Piston rod; 7. Fixed end; 101. First inner hole; 102. First end face; 103. Fifth inner hole; 104. Second inner hole; 105. Bottom surface of inner hole; 106. Third inner hole; 107. Second end face; 201. Third end face; 202. Fourth inner hole; 203. Limiting hole; 204. Sixth inner hole; 205. Fourth end face; 301. Fifth end face; 302. External thread. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please see Figures 1-5 As shown, a piston rod outer circle polishing protection device includes an upper connecting plate 1, a lower connecting plate 2 and a plug 3. The plug 3 is installed at one end of the piston rod 6, and the other end of the piston rod 6 is fitted inside the lower connecting plate 2. The end of the lower connecting plate 2 away from the piston rod 6 is connected to the upper connecting plate 1, and the end of the upper connecting plate 1 away from the lower connecting plate 2 is connected to an externally preset polishing device.

[0024] Specifically, the piston rod 6 includes a fixed end 7 and a polishing area, and the plug 3 is installed at the end of the piston rod 6 away from the fixed end 7. One end of the plug 3 is connected to a protruding post, the outer wall of which is provided with external threads 302. The protruding post is inserted into one end of the piston rod 6 and connected to the internal threads on the inner wall of the piston rod 6 end via the external threads 302. The plug 3, connected to one end of the piston rod 6 via threads, can seal and support one end of the piston rod 6, preventing deformation or impact to the end of the piston rod 6 during subsequent polishing. The threaded design facilitates the removal and installation of the plug 3.

[0025] Specifically, both the lower connecting plate 2 and the upper connecting plate 1 are convex in shape. The bottom ends of the bases of the lower connecting plate 2 and the upper connecting plate 1 are aligned with each other. The bottom edges of the bases of the lower connecting plate 2 and the upper connecting plate 1 are respectively provided with multiple fourth inner holes 202 and multiple first inner holes 101. When the lower connecting plate 2 and the upper connecting plate 1 are connected, one end of the bolt 4 passes through the fourth inner hole 202 and the first inner hole 101 and is threadedly connected to a nut 5. During installation, the first end face 102 of the upper connecting plate 1 contacts the third end face 201 of the lower connecting plate 2. The bolt 4 passes through the fourth inner hole 202 and the first inner hole 101, and is threaded onto the bolt 4 using the nut 5 until the nut 5 is tightened and abuts against the end face 205 of the other end of the lower connecting plate 2. This ensures stable installation of the lower connecting plate 2 and the upper connecting plate 1, preventing shaking during subsequent use.

[0026] Specifically, the lower connecting plate 2 has a through hole inside, which consists of a limiting hole 203 and a sixth inner hole 204. The sixth inner hole 204 is opened on the protruding end of the lower connecting plate 2 and extends inward to communicate with the limiting hole 203. The end of the limiting hole 203 away from the sixth inner hole 204 passes through the protruding end and the base end of the lower connecting plate 2. The inner diameter of the limiting hole 203 is larger than the inner diameter of the sixth inner hole 204. The limiting hole 203 and the sixth inner hole 204 facilitate the limiting and fixing of the fixed end 7 of the piston rod 6 after the piston rod 6 is installed, so that the piston rod 6 can no longer rotate, and the polishing area of ​​the piston rod 6 can be exposed to facilitate the subsequent polishing equipment to perform stable polishing treatment on its outer wall.

[0027] When the piston rod 6 is installed with the lower connecting plate 2, the polishing area of ​​the piston rod 6 passes through the limiting hole 203 and the sixth inner hole 204. The fixed end 7 is installed inside the limiting hole 203 and the sixth inner hole 204. The outer surface of the inner end of the limiting hole 203 away from the second inner hole 204 and the outer surface of the fixed end 7 away from the polishing area are both non-cylindrical surfaces. After the fixed end 7 is installed inside the limiting hole 203, the limiting hole 203 can limit the fixed end 7. During the subsequent polishing process, the piston rod itself will not rotate, which facilitates stable and orderly polishing.

[0028] Specifically, the base end of the upper connecting plate 1 has a fifth inner hole 103, the protruding end of the upper connecting plate 1 has a second inner hole 104, and two third inner holes 106 are opened on both sides of the outer wall of the protruding end of the upper connecting plate 1. The third inner holes 106 penetrate the outer wall of the protruding end and communicate with the second inner holes 104. The fifth inner hole 103 is used to place a portion of the end of the fixing end 7, and the second inner hole 104 is used to connect with the fixing rod of the external polishing equipment. After the fixing rod is inserted into the interior of the second inner hole 104, the bolt 4 is inserted into the interior of the third inner hole 106 and passes through the pre-set opening on the fixing rod until one end of the bolt 4 passes through the third inner hole 106 on the other side and is installed with a nut, so that the upper connecting plate 1 can be installed with the external polishing equipment.

[0029] Specifically, after the lower connecting plate 2 is installed with the upper connecting plate 1 and the piston rod 6, one end of the fixed end 7 of the piston rod 6 extends into the fifth inner hole 103 of the upper connecting plate 1. A 0.1mm gap is reserved between the outer wall of the fixed end 7 and the inner wall of the fifth inner hole 103, a 0.5mm gap is reserved between the end of the fixed end 7 and the inner end of the fifth inner hole 103, and a 0.1mm gap is reserved between the outer wall of the fixed end 7 and the inner walls of the limiting hole 203 and the sixth inner hole 204. (See attached...) Figure 2 As can be seen, the fixed end 7 is divided into three parts, from left to right: the polygonal end, the cylindrical middle section, and the rightmost transition section. After the piston rod 6 is properly installed, the transition section is located inside the sixth inner hole 204, the cylindrical middle section is located below the inner limit hole 203, and the polygonal end is located above the inner limit hole 203. One end of the polygonal end extends into the fifth inner hole 103 at the end of the upper connecting plate 1, thus limiting one end of the piston rod 6. Figure 3 and Figure 4 As can be seen from the diagram, the interior of the fifth inner hole 103, at the end furthest from the bottom surface 105, and the upper part of the limiting hole 203 are both polygonal in shape, which fits the end of the fixed end 7, preventing the piston rod 6 from rotating during polishing. A pre-reserved clearance is provided for installation to prevent severe wear or compression of the piston rod 6 during installation, and to avoid deformation and damage to the piston rod 6.

[0030] In use, the polishing area of ​​the piston rod 6 passes through the limiting hole 203 and the sixth inner hole 204. The fixed end 7 is installed inside the limiting hole 203 and the sixth inner hole 204. Then, the upper connecting plate 1 and the lower connecting plate 2 are installed with bolts 4. The plug 3 is threaded onto the other end of the piston rod 6. Finally, the upper connecting plate 1 is installed with the fixing rod of the polishing equipment. The fixing rod can drive the upper connecting plate 1, the lower connecting plate 2 and the piston rod 6 to rotate. In conjunction with the polishing structure on the polishing equipment, such as a polishing belt or a polishing wheel, the polishing area of ​​the piston rod 6 can be fully polished.

[0031] After the piston rod 6 is polished, the upper connecting plate 1 is removed from the polishing equipment, and other piston rods 6 to be polished are installed. Several polishing protective devices can be prepared, so that only the upper connecting plate 1 needs to be removed from the polishing equipment during the polishing process. During the downtime in the polishing process, the polishing protective device can be removed from the polished piston rod 6 and installed on the piston rod 6 to be polished, which can further improve work efficiency.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A protective device for polishing the outer diameter of a piston rod, characterized in that, It includes an upper connecting plate (1), a lower connecting plate (2) and a plug (3). The plug (3) is installed at one end of the piston rod (6), and the other end of the piston rod (6) is fitted inside the lower connecting plate (2). The end of the lower connecting plate (2) away from the piston rod (6) is connected to the upper connecting plate (1), and the end of the upper connecting plate (1) away from the lower connecting plate (2) is connected to an externally preset polishing device.

2. The piston rod outer circle polishing protection device according to claim 1, characterized in that, The piston rod (6) includes a fixed end (7) and a polished area, and a plug (3) is installed on the end of the piston rod (6) away from the fixed end (7).

3. The piston rod outer circle polishing protection device according to claim 2, characterized in that, One end of the plug (3) is connected to a protruding post, and the outer wall of the protruding post is provided with an external thread (302). The protruding post is inserted into one end of the piston rod (6) and connected to the internal thread of the inner wall of the piston rod (6) through the external thread (302).

4. The piston rod outer circle polishing protection device according to claim 1, characterized in that, Both the lower connecting plate (2) and the upper connecting plate (1) are convex. The bottom of the base end of the lower connecting plate (2) and the upper connecting plate (1) are connected to each other. The bottom edge of the base end of the lower connecting plate (2) and the upper connecting plate (1) are respectively provided with multiple fourth inner holes (202) and multiple first inner holes (101). When the lower connecting plate (2) and the upper connecting plate (1) are connected, one end of the bolt (4) passes through the fourth inner hole (202) and the first inner hole (101) and is threaded with a nut (5).

5. A piston rod outer circle polishing and protection device according to claim 4, characterized in that, The lower connecting plate (2) has a through hole inside. The through hole consists of a limiting hole (203) and a sixth inner hole (204). The sixth inner hole (204) is opened on the protruding end of the lower connecting plate (2) and extends inward to communicate with the limiting hole (203). The end of the limiting hole (203) away from the sixth inner hole (204) passes through the protruding end and the base end of the lower connecting plate (2). The inner diameter of the limiting hole (203) is larger than the inner diameter of the sixth inner hole (204).

6. The piston rod outer circle polishing protection device according to claim 4, characterized in that, The upper connecting plate (1) has a fifth inner hole (103) at the base end, a second inner hole (104) at the protruding end, and two third inner holes (106) on both sides of the outer wall of the protruding end of the upper connecting plate (1). The third inner holes (106) penetrate the outer wall of the protruding end and communicate with the second inner hole (104).

7. A piston rod outer circle polishing protection device according to claim 6, characterized in that, When the piston rod (6) is installed with the lower connecting plate (2), the polished area of ​​the piston rod (6) passes through the limiting hole (203) and the sixth inner hole (204). The fixed end (7) is installed inside the limiting hole (203) and the sixth inner hole (204). The outer side of the inner end of the limiting hole (203) away from the second inner hole (204) and the outer side of the fixed end (7) away from the polished area are both non-cylindrical surfaces.

8. A piston rod outer circle polishing and protection device according to claim 7, characterized in that, After the lower connecting plate (2) is installed with the upper connecting plate (1) and the piston rod (6), one end of the fixed end (7) of the piston rod (6) extends into the fifth inner hole (103) of the upper connecting plate (1), and a 0.1mm gap is reserved between the outer wall of the fixed end (7) and the inner wall of the fifth inner hole (103), a 0.5mm gap is reserved between the end of the fixed end (7) and the inner end of the fifth inner hole (103), and a 0.1mm gap is reserved between the outer wall of the fixed end (7) and the inner wall of the limiting hole (203) and the sixth inner hole (204).

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